Rinnai RSC160iN Manual
Rinnai
Kedler & kedler
RSC160iN
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Tankless Water Heater (With Pump)
Installation and Operation Manual
ANSI Z21.10.3 CSA 4.3
INTERNAL INDOOR MODELS:
RSCi REUNPFFUSA
RSCi REUNPFFUSA
EXTERNAL OUTDOOR MODELS:
RSCe REUNPWUSA
RSCe REUNPWUSA
CUS
U334-0777(00)
06000012350449
2 Rinnai Tankless Water Heater Installation and Operation Manual
WARNING
If the information in these instructions is not followed exactly, a re or explosion may result
causing property damage, personal injury, or death.
• Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any
other appliance.
• WHAT TO DO IF YOU SMELL GAS
– Do not try to light any appliance.
– Do not touch any electrical switch; do not use any phone in your building.
– Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
– If you cannot reach your gas supplier, call the re department.
• Installation and service must be performed by a trained and qualied professional, service
agency or the gas supplier.
Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion ou pour éviter tout dommage matériel, toute
blessure ou la mort.
• Ne pas entreposer ni utiliser d’essence ou ni d’autres vapeurs ou liquides inammables à
proximité de cet appareil ou de tout autre appareil.
• QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
– Ne pas tenter d’allumer d’appareil.
– Ne touchez à aucun interrupteur ; ne pas vous servir des téléphones se trouvant dans le
bâtiment.
– Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions
du fournisseur.
– Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
• L’installation et l’entretien doivent être assurés par un installateur ou un service d’entretien
qualié ou par le fournisseur de gaz.
AVERTISSEMENT
Full-length French and Spanish versions available online at rinnai.us
Rinnai Tankless Water Heater Installation and Operation Manual 3
Contents
1. Welcome .......................................................................................................................................... 5
2. Safety ............................................................................................................................................... 6
2.1 Safety Symbols ....................................................................................................................... 7
2.2 Safety Precautions .................................................................................................................. 7
3. About the Water Heater .................................................................................................................. 9
3.1 Front View ............................................................................................................................... 9
3.2 Bottom View .......................................................................................................................... 10
3.3 Components ......................................................................................................................... 11
3.4 Specications ........................................................................................................................ 12
3.5 Dimensions ........................................................................................................................... 13
3.6 Accessories .......................................................................................................................... 15
4. Install the Water Heater ................................................................................................................ 17
4.1 Installation Guidelines .......................................................................................................... 17
4.2 What You Will Need .............................................................................................................. 18
4.3 Choose an Installation Location ............................................................................................ 19
4.4 Mount the Water Heater to the Wall ...................................................................................... 24
4.5 Vent the Water Heater .......................................................................................................... 26
4.6 Connect Water Supply .......................................................................................................... 50
4.7 Install the Isolation Valves .................................................................................................... 51
4.8 Install Pressure Relief Valve ................................................................................................. 52
4.9 Connect Condensate Drain .................................................................................................. 54
4.10 Connect the Gas Supply ....................................................................................................... 57
4.11 Connect the Power Supply ................................................................................................... 60
4.12 Congure Parameter Settings ............................................................................................. 61
4.13 Post-Water Heater Installation Checklist ............................................................................. 63
5. Operation .......................................................................................................................................65
5.1 Safety Precautions ................................................................................................................65
5.2 Operating Instructions ...........................................................................................................67
5.3 Control Panel ........................................................................................................................68
5.4 Setting the Temperature .......................................................................................................69
5.5 Performance Data .................................................................................................................70
4 Rinnai Tankless Water Heater Installation and Operation Manual
5.6 Diagnostic Codes ..................................................................................................................72
5.7 Conguring Recirculation .....................................................................................................75
6. Maintenance .................................................................................................................................. 81
6.1 Maintenance ......................................................................................................................... 81
6.2 Cleaning and Inspecting the Air Filter (Indoor Units Only) .................................................... 83
6.3 Flushing the Heat Exchanger ............................................................................................... 85
6.4 Draining the Water Heater .................................................................................................... 86
7. Appendices ................................................................................................................................... 87
7.1 Massachusetts State Gas Regulations ................................................................................. 87
7.2 Wiring Diagram ..................................................................................................................... 89
7.3 Ladder Diagram .................................................................................................................... 90
7.4 Pressure Drop and Water Flow Curves ................................................................................ 91
7.5 Pressure Drop Curve (Water Heater + Pump) ...................................................................... 92
7.6 Guidelines for Additional Temperature Controllers ............................................................... 93
8. Warranty ........................................................................................................................................ 94
Rinnai Tankless Water Heater Installation and Operation Manual 5
ANSI American National Standards
Institute
BTU British Thermal Unit
DHW Domestic Hot Water
GPM Gallons per minute
LPG Liqueed Petroleum Gas
NG Natural Gas
PP Polypropylene
PRV Pressure Relief Valve
PSI Pounds per square inch
WC Inches of water column
To The Consumer
• You must read the entire manual to
properly operate the water heater and to
have regular maintenance performed.
• Keep this manual for future reference.
• As when using any appliance generating
heat, there are certain safety precau-
tions you should follow. See section “2.2
Safety Precautions” for detailed safety
precautions.
• Be sure your water heater is installed by
a trained and qualied professional.
• -If installing in the state of Massachu
setts, you must read section “7.1 Massa-
chusetts State Gas Regulations” in this
manual.
Acronyms and Abbreviations
Following is a list of common acronyms and
abbreviations used in this manual:
Thank you for purchasing a Rinnai Tankless
Water Heater. Before installing and operating
this water heater, be sure to read these
instructions completely and carefully to
familiarize yourself with the water heater’s
features and functionality.
To The Installer
• It is recommended that a trained and
qualied professional who has attended
a Rinnai training class complete your
installation. The warranty may be voided
due to any improper installation.
• The trained and qualied professional
should have skills such as:
– Gas sizing
– Connecting gas lines, water lines,
valves, and electricity
– Knowledge of applicable national,
state, and local codes
– Installing venting through a wall or
roof
– Training on installation of Rinnai
tankless water heaters is accessible
at rinnaipro.myabsorb.com
• Read all instructions in this manual
before installing the water heater. The
water heater must be installed according
to the exact instructions in this manual.
• Proper installation is the responsibility of
the installer.
• When installation is complete, leave
this manual with the water heater (for
internal/indoor units) or give the manual
directly to the consumer.
1.
1.
1.
1. 1. W
W
W
Welcome
elcome
elcome
elcomeWelcome
Table 1
WARNING AVERTISSEMENT
6 Rinnai Tankless Water Heater Installation and Operation Manual
• -Assurez-vous de bien suivre les instruc
tions données dans cette notice pour
réduire au minimum le risque d’incend-
ie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la
mort.
• Ne pas entreposer ni utiliser d’essence
ou ni d’autres vapeurs ou liquides in-
ammables à proximité de cet appareil
ou de tout autre appareil.
• QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ :
– Ne pas tenter d’allumer d’appareil.
– Ne touchez à aucun interrupteur ; ne
pas vous servir des téléphones se
trouvant dans le bâtiment.
– Appelez immédiatement votre
fournisseur de gaz depuis un voisin.
Suivez les instructions du fournis-
seur.
– Si vous ne pouvez rejoindre le
fournisseur, appelez le service des
incendies.
• L’installation et l’entretien doivent être
assurés par un installateur ou un service
d’entretien qualié ou par le fournisseur
de gaz.
• Les panneaux d’avertissement de ce
manuel sont ici pour éviter de vous
blesser et d’autres personnes. Suivez-
les explicitement.
• If the information in these instructions is
not followed exactly, a re or explosion
may result causing property damage,
personal injury, or death.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS:
– Do not try to light any appliance.
– Do not touch any electrical switch; do
not use any phone in your building.
– Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
– If you cannot reach your gas supplier,
call the re department.
• -Installation and service must be per
formed by a trained and qualied
professional, service agency or the gas
supplier.
• The warning signs in this manual are
here to prevent injury to you and others.
Please follow them explicitly.
2.
2.
2.
2. 2. Sa
Sa
Sa
Saf
f
f
fe
e
e
ety
ty
ty
tySafety
WARNING
CAUTION
WARNING
Rinnai Tankless Water Heater Installation and Operation Manual 7
2.2 Safety Precautions
The following precautions apply to the installer and
consumer. Read and follow all instructions in this
section.
DO NOT adjust the inter-
nal gas valve.
The design is such that adjustment is not re-
quired. Warranty may be voided if the internal gas
valve is adjusted.
• -Before operating, smell all around the ap
pliance area for gas. Be sure to smell next
to the oor because some gas is heavier
than air and will settle on the oor.
• Keep the area around the appliance clear
and free from combustible materials,
gasoline, and other ammable vapors and
liquids.
• -Combustible construction refers to adja
cent walls and ceiling and should not be
confused with combustible or ammable
products and materials. Combustible and/
or ammable products and materials
should never be stored in the vicinity of
this or any gas appliance.
• -Always check the water temperature be
fore entering a shower or bath.
• To protect yourself from harm, before per-
forming maintenance:
– Turn o the electrical power supply by
unplugging the power cord or by turning
o the electricity at the circuit breaker.
(The temperature controller does not
control the electrical power.)
– -Turn o the gas at the manual gas con
trol valve, usually located immediately
below the water heater.
– Turn o the incoming water supply.
This can be done at the isolation valve
immediately below the water heater or
by turning o the water supply to the
building.
Safety alert symbol. Alerts you to
potential hazards that can kill or hurt
you and others.
Indicates an imminently
hazardous situation which,
if not avoided, will result in
personal injury or death.
DANGER
Indicates a potentially
hazardous situation which,
if not avoided, could result
in minor or moderate injury.
It may also be used to alert
against unsafe practices.
Indicates an imminently
hazardous situation which,
if not avoided, will result in
personal injury or death.
2.1 Safety Symbols
8 Rinnai Tankless Water Heater Installation and Operation Manual
• -DO NOT operate the water heater with
out the front panel installed. The front
panel should only be removed for ser-
vice/maintenance or replacing internal
components.
• BURN HAZARD. Hot exhaust and vent
may cause serious burns. Keep away
from the water heater. Keep small chil-
dren and animals away from the water
heater.
• Hot water outlet pipes leaving the water
heater can be hot to touch.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
(Ne pas entreposer ni utiliser d’essence
ou ni d’autres vapeurs ou liquides inam-
mables à proximité de cet appareil ou de
tout autre appareil.)
• Install the vent system per local and
national codes.
• Do not install this water heater above
10,200 ft (3,109 m).
• Do not obstruct combustion air to the
water heater.
• Failure to properly vent this appliance
can result in death, personal injury and/
or property damage.
• Rinnai recommends that every home
have a carbon monoxide (CO) alarm
in the hallway near bedrooms in each
sleeping area. Check batteries monthly
and replace them annually.
– -Use only your hand to turn the manu
al gas control valve. Never use tools.
If the manual gas control valve will
not turn by hand, do not try to repair
it; call a trained and qualied profes-
sional. Force or attempted repair may
result in a re or explosion.
• Do not use this appliance if any part
has been under water. Immediately call
a trained and qualied professional to
inspect the appliance and to replace any
part of the control system and any man-
ual gas control valve which has been
under water.
(N’utilisez pas cet appareil s’il a été
plunge dans l’eau, même partiellement.
Faites inspecter l’appareil par un licence
professionnelle et remplacez toute partie
du système de contrôle et toute com-
mande qui ont été plongés dans l’eau.)
• Do not use substitute materials. Use only
parts certied for the appliance.
• Should overheating occur or the gas
supply fail to shut o, turn o the manual
gas control valve to the appliance.
(En cas de surchaue ou si l’alimen-
tation en gaz ne s’arrête pas, fermez
manuellement le robinet d’arrêt de l’ad-
mission de gaz.)
• -Only trained and qualied profession
als are permitted to adjust parameter
settings.
• Do not use an extension cord or adapter
plug with this appliance.
• Any alteration to the appliance or its
controls can be dangerous and will void
the warranty.
• Proper venting is required for the safe
operation of this appliance.
• Flammable liquids such as cleaning
solvents, aerosols, paint thinners, ad-
hesives, gasoline and propane must be
handled and stored with extreme care.
These ammable liquids emit ammable
vapors and when exposed to an ignition
source can result in a re hazard or
explosion. Flammable liquids should not
be used or stored in the vicinity of this or
any other gas appliance.
10 Rinnai Tankless Water Heater Installation and Operation Manual
3.2 Bottom View
Gas
Hot Water
Outlet
Cold Water
Inlet
Pressure Relief
Valve
Figure 2: Bottom View
Rinnai Tankless Water Heater Installation and Operation Manual 11
3.3 Components
Air Intake
Burner Assembly
Ignition Unit
PC Board
Integrated
Pump
Heat Exchanger
Gas Valve
Flue Gas Exhaust
Air Inlet Filter
Fan with Integrated
Venturi
Silencer
Bypass Flow
Servo Valve
Intake
Exhaust
Water Flow
Servo Valve
Controller removed
for clarity.
Pump PC Board
Figure 3: Components
12 Rinnai Tankless Water Heater Installation and Operation Manual
3.4 Specifications
Indoor Units Outdoor Units
RSC199i RSC160i RSC199e RSC160e
Minimum Gas Consumption
Btu/h 15,000
Maximum Gas
Consumption Btu/h 199,000 160,000 199,000 160,000
Flow Rate1
(Min-Max) 0.26-9.8 GPM
(1.0-37 L/min) 0.26-8.0 GPM
(1.0-30 L/min) 0.26-9.8 GPM
(1.0-37 L/min) 0.26-8.0 GPM
(1.0-30 L/min)
Max Flow Rate
with Parameter Adjustment 11 GPM (42 L/min) 9 GPM (34 L/min) 11 GPM (42 L/min) 9 GPM (34 L/min)
Weight 68 lb (31 kg) 66 lb (30 kg) 68 lb (31 kg) 66 lb (30 kg)
Sound Level 49 dB 48 dB 53 dB 52 dB
Electrical Data
Normal 78 W 57 W 78 W 55 W
Standby 2.3 W
Freeze Protection 150 W 172 W
Max Current 4 Amps
Fuse 10 Amps
Temperature Setting Minimum: Normal Operation: 98°F (37°C) (Crossover Mode: 120°F (49°C)
Maximum: Default: 120°F (49°C) With Parameter Adjustment: 140°F (60°C)
Bypass Flow Control Electronic
Gas
Supply
Pressure2
Natural Gas 3.5 in. wc - 10.5 in. wc
Propane 8.0 in. wc - 13.5 in. wc
Type of Appliance Super-High-Eciency (Condensing), Tankless, Temperature Controlled,
Continuous Flow Gas Hot Water System
Ignition System Direct Electronic Ignition
Electric Connections Appliance: AC 120 Volts, 60Hz
Temperature Controller: DC 12 Volts (Digital)
Water Supply Pressure Minimum: 50 PSI (Recommended 60-80 PSI for maximum performance)
Maximum: 150 PSI
Remote Control Cable Non-Polarized Two Core Cable (Minimum 22 AWG)
ENERGY STAR® Qualied Yes
Complies with South Coast
Air Quality Management
District 14 ng/J or 20 ppm
NOx emission levels
Yes
1 Minimum ow may vary slightly depending on the temperature setting and the inlet water temperature. Minimum activation ow is
0.4 GPM (1.5 L/min).
2 The maximum gas supply pressure must not exceed the value specied by the manufacturer.
Rinnai products are continually being updated and improved; therefore, specications are subject to change without prior notice.
Table 2: Specications
Rinnai Tankless Water Heater Installation and Operation Manual 15
Product Product Description Image
Room Air Screen
Part #: 108000105
Recommended room air screen for use in
room air applications only.
Condensate Neutralizer
Part #: 804000074
Neutralizes the condensate generated by
the water heater.
ScaleCutter
Part #: 103000038
Filters and reduces the amount of scale
entering the water heater allowing for
greater water heater longevity.
ScaleCutter Rell
Cartridge
Part #: 103000039
Rell cartridge for the ScaleCutter lter
assembly.
Drain Down Kit
Part #: 104000059
Provides freeze protection by immediate-
ly draining the water heater upon loss of
power.
Additional Controller
Part #: MC-601-BK
MC-601-W
MC-195T-US
MCC-91-2
MCC-601
Additional controllers are available for
user convenience.
Recess Box
Part #: RGB-CTWH-4
Allows an external (outdoor) water heater
to be recessed into a wall.
Pipe Cover
Part #: PCD07-SM
Encloses the piping below the water
heater for aesthetic purposes.
control•r™ Wi-Fi Mod-
ule (And Accessories)
Part #: RWM101
Controls On-Demand recirculation, re-
motely adjust temperatures, and commu-
nicates with the service provider portal.
The control•r™ Wi-Fi Module and MC-
195T-US controller are not compatible
accessories and must not be installed
together.
3.6 Accessories
Numerous optional accessories are available for purchase for your Rinnai Tankless Water Heater. Listed
below are some commonly purchased accessories. For a complete list of accessories, visit www.rinnai.us.
For questions, or to purchase an accessory, contact your local Rinnai dealer/distributor or Rinnai
Customer Care at 1-800-621-9419.
Table 4: Accessories
16 Rinnai Tankless Water Heater Installation and Operation Manual
Product Product Description Image
EZConnect™ Cable
Part #: REU-EZC-2
Electronically connects two water heaters
and allows them to function as one hot
water source.
Push Button
Part #: RWMPB02
Mounted in a convenient location, such
as a kitchen faucet or bathroom sink,
the wireless push button works with the
control•r™ Module to operate the tank-
less water heater recirculation system by
pushing the button.
Motion Sensor
Part #: RWMMS02
Mounted near the point of use, like a
kitchen faucet or bathroom sink, the wire-
less motion sensor works with the con-
trol•r™ Module to operate the tankless
water heater recirculation system with the
detection of motion.
Rinnai Tankless Water Heater Installation and Operation Manual 17
4.
4.
4.
4. 4. Ins
Ins
Ins
Install the W
tall the W
tall the W
tall the Wa
a
a
at
t
t
ter Hea
er Hea
er Hea
er Heat
t
t
ter
er
er
erInstall the Water Heater
THIS SECTION IS INTENDED FOR THE
INSTALLER
Installer qualications: A trained and qualied
professional must install the appliance, inspect
it, and leak test the water heater before
use. The warranty will be voided due to any
improper installation. The trained and qualied
professional should have skills such as: Gas
sizing; Connecting gas lines, water lines, valves,
and electricity; Knowledge of applicable national,
state, and local codes; Installing venting through
a wall or roof; and training in installation of
tankless water heaters. Training for Rinnai
Tankless Water Heaters is accessible online at
www.trainingevents.rinnai.us.
4.1 Installation
Guidelines
When installing the water heater, follow these
guidelines:
• -This water heater is certied for instal
lation in residential applications and
manufactured (mobile) homes.
• -This water heater is suitable for combi
nation water heating and space heating
and not suitable for space heating appli-
cations only.
• The installation must conform with local
codes or, in the absence of local codes,
with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, or the Natural Gas and
Propane Installation Code, CSA B149.1.
If installed in a manufactured home, the
installation must conform with the Manu-
factured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 and/
or CAN/SCA Z240 MH Series, Mobile
Homes.
• The appliance, when installed, must be
electrically grounded in accordance with
local codes or, in the absence of local
codes, with the National Electrical Code,
ANSI/NFPA 70, or the Canadian Electri-
cal Code, CSA C22.1.
• The appliance and its main gas valve
must be disconnected from the gas sup-
ply piping system during any pressure
testing of that system at test pressures
in excess of 1/2 psi (3.5 kPa) (13.84 in
Wc). For system testing at pressures
less than or equal to 1/2 psi (3.5 kPa)
(13.84 in Wc) the appliance must be iso-
lated from the gas supply piping by clos-
ing its individual manual shuto valve.
• You must follow the installation instruc-
tions and those in section “4.5 Vent the
Water Heater” for adequate combustion
air and exhaust.
• If a water heater is installed in a closed
water supply system, such as one
having a backow preventer in the cold
water supply line, means shall be provid-
ed to control thermal expansion. Contact
the water supplier or local plumbing
inspector on how to control thermal
expansion.
• Should overheating occur or the gas
supply fail to shut o, turn o the manual
gas control valve to the appliance.
(En cas de surchaue ou si l’alimen-
tation en gaz ne s’arrête pas, fermez
manuellement le robinet d’arrêt de l’ad-
mission de gaz.)
• -Combustion air must be free of chem
icals, such as chlorine or bleach, that
produce fumes. These fumes can dam-
age components and reduce the life of
your appliance.
Topics in this section
• Installation Guidelines
• What you will need
• Choose Installation Location
• Mount Water Heater to the Wall
• Vent Water Heater
• Connect Water Supply
• Install Isolation Valves
• Install Pressure Relief Valve
• Connect Condensate Drain
• Connect Gas Supply
• Connect Power Supply
• Congure Parameter Settings
• Connect External Pump with Circ-Logic
• Post-Installation Checklist
18 Rinnai Tankless Water Heater Installation and Operation Manual
DO NOT
• DO NOT install the following internal
(indoor) water heaters outdoor: RSC199i
and RSC160i.
• -DO NOT install the following exter
nal (outdoor) water heaters indoor:
RSC199e and RSC160e.
• DO NOT install the water heater in an
area where water leakage of the unit
or connections will result in damage to
the area adjacent to the appliance or to
lower oors of the structure. When such
locations cannot be avoided, it is recom-
mended that a suitable drain pan, ade-
quately drained, be installed under the
water heater. The pan must not restrict
combustion air ow.
• DO NOT install the water heater in an
area with negative air pressure.
• DO NOT obstruct the ow of combustion
and ventilation air.
• DO NOT use chemically treated water
(i.e. chlorinated water or salt water for
pools or spas) in the appliance.
• DO NOT use substitute parts that are not
authorized for this appliance.
4.2 What You Will
Need
4.2.1 Items Included
Unpack the Rinnai Tankless Water Heater
package and verify the following contents are
included. If any items are missing, contact your
local dealer/distributor or call Rinnai Customer
Care at 1-800-621-9419.
• Rinnai Tankless Water Heater
• Wall Mounting Bracket (for internal/in-
door water heaters only)
• Pressure Relief Valve and Adapter
• Isolation Valve Kit (for quick isolation
of the water heater for service and/or
maintenance)
• Thermal Isolation Valve
• Literature Bag
– Tankless Water Heater Installation
and Operation Manual (this manual)
– Wall Mounting Bracket Template (for
internal/indoor water heaters only)
– Model/Serial Number Labels (with
printed QR code)
• Controller Cable (for additional controller
connection)
• Vent screens (x2) and vent screen
screws (x2) (for internal/indoor water
heaters only). The vent screen prevents
debris and other objects from entering
the terminal. One vent screen is for the
intake; the other is for the exhaust.
• Self-Tapping Screws (x2) (for internal/
indoor water heaters only)
4.2.2 Items Needed
(Field-Supplied)
• Pipe wrenches (x2)
• Phillips Head screwdriver
• Wire Cutters
• Gloves
• Safety glasses
• Level
• Soap or gas leak detector solution
• Approved venting
• Teon tape (recommended) or pipe
compound
• Pipe insulation
• 3/4 in. Tee (For Dedicated Return)
• 3/4 in. Check Valve (For Dedicated
Return)
• Hammer drill with concrete bits
• Saw
• Threading machine with heads and oiler
• Core drill with diamond head
• Torch set
• Copper tubing cutter
• Steel pipe cutter
• Heat tape
• Electrical wire
• Concrete wall anchors
• Optional pipe cover
• PVC glue/cement and primer
• 2 conductor 22 AWG wire for controller
• Union and drain valves
• Single gang electrical box
• Wire nuts
• Unions and drain valves
Rinnai Tankless Water Heater Installation and Operation Manual 19
4.3 Choose an
Installation
Location
When selecting an installation location, you
must ensure that clearances will be met and
that the vent length will be within required
limits. Consider the installation environment,
water quality, and need for freeze protection.
Requirements for the gas line, water lines,
electrical connection, and condensate disposal
can be found in their respective installation
sections in this manual.
4.3.1 Water Quality
Guidelines
This section provides information on the
importance of water quality to the Rinnai
Tankless Water Heater. The information is
intended to serve as general guidelines only and
is not a complete list of water quality guidelines.
Consideration of care for your water heater
should include evaluation of water quality.
The water must be potable, free of corrosive
chemicals, sand, dirt, or other contaminants. It
is up to the trained and qualied professional
to ensure the water does not contain corrosive
chemicals or elements that can aect or damage
the Rinnai Tankless Water Heater. Water that
contains chemicals exceeding the levels below
can damage the Rinnai Tankless Water Heater.
Replacement of components due to water quality
damage is not covered by the warranty.
If you install this water heater in an area that
is known to have hard water or that causes
scale build-up, the water must be treated and
may require a more frequent ushing schedule.
This water heater includes a service indicator
(Service Soon, ). When selected in the SS
parameter settings, an code will display on SS
the controller indicating that it is time to ush
and service the water heater. Scale build-up is
caused by hard water and can be accelerated
if the water heater is set at a high temperature.
Rinnai oers Southeastern Filtration’s
“ScaleCutter Water Conditioning System”
that oers superior lime scale prevention and
corrosion control.
4.3.2 Environment
Air surrounding the water heater, venting, and
vent termination(s) is used for combustion and
must be free of any compounds that cause
corrosion of internal components.
These include corrosive compounds that are
found in aerosol sprays, detergents, bleaches,
cleaning solvents, oil-based paints/varnishes,
and refrigerants. The air in beauty shops, dry
cleaning stores, photo processing labs, and
storage areas for pool supplies often contains
these compounds. Therefore, it is recommended
that external (outdoor) models be used for
these locations where possible. In applications
utilizing room air where there are high levels of
particulates, Rinnai oers a room air screen.
The water heater, venting, and vent
termination(s) should not be installed in any
areas where the air may contain these corrosive
compounds.
*Source: Part 143 National Secondary Drinking Water
Regulation
Contaminant Maximum Level
Total Hardness Up to 200 mg/L
Aluminum * Up to 0.2 mg/L
Chlorides * Up to 250 mg/L
Copper * Up to 1.0 mg/L
Dissolved Carbon
Dioxide (CO2) Up to 15.0 mg/L
Iron * Up to 0.3 mg/L
Manganese * Up to 0.05 mg/L
pH * 6.5 to 8.5
TDS (Total Dissolved
Solids) * Up to 500 mg/L
Zinc * Up to 5 mg/L
Table 5: Water Quality Guidelines
20 Rinnai Tankless Water Heater Installation and Operation Manual
4.3.3 Internal (Indoor) Water
Heaters
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation.
Chemicals that are corrosive in nature
should not be stored or used near the
water heater or vent termination. This
requirement applies to internal (indoor)
and external (outdoor) water heater.
• In coastal regions, the water heater
should be installed so that it is sheltered/
protected from exposure to sea breeze.
Exposure to salty spray or breeze can
cause corrosion of the water heater.
• DO NOT install the water heater in areas
where combustion air might be contami-
nated with chemicals.
• DO NOT use room air in applications
where the indoor air is corrosive. In-
stall the water heater as direct vent in a
sealed closet so that it is protected from
the potential of contaminated indoor air
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation.
Chemicals that are corrosive in nature
should not be stored or used near the
water heater or vent termination. This
requirement applies to internal (indoor)
and external (outdoor) water heaters.
4.3.4 External Water
Heaters and Vent
Terminations
• Install the water heater as far away as
possible from exhaust vent hoods and
dryer vents.
• In coastal regions, the water heater
should be installed so that it is sheltered/
protected from exposure to sea breeze.
Exposure to salty spray or breeze can
cause corrosion of the water heater.
• Damage and repair due to corrosive
compounds in the air is not covered by
warranty.
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation.
Chemicals that are corrosive in nature
should not be stored or used near the
water heater or vent termination. This
requirement applies to internal (indoor)
and external (outdoor) water heaters.
Rinnai Tankless Water Heater Installation and Operation Manual 21
4.3.5 Freeze Protection
Make sure that in case of freezing weather the water heater and its water lines are protected to
prevent freezing. Damage due to freezing is not covered by the warranty.
When connected to gas and 120-volt power supply, the water heater will not freeze when the outside
air temperature is as cold as -22°F (-30°C) for internal (indoor) models or -4°F (-20°C) for external
(outdoor) models, when protected from direct wind exposure. Because of the “wind-chill” eect, any
wind or circulation of the air on the water heater will reduce its ability to protect itself from freezing.
In the event of a power failure and/or gas interruption at temperatures below freezing, the water
heater should manually be drained of all water to prevent freezing damage. In addition, drain the
condensate trap, drain line and pressure relief valve.
Loss of freeze protection may result in water damage from a burst heat exchanger or water lines.
The water heater may be drained manually. However, it is highly recommended to install the optional
Drain Down Kit accessory that will enable the water heater to immediately drain upon loss of power
(the condensate trap and pressure relief valve are not aected by the Drain Down Kit and must be
manually drained).
The freeze protection features will not prevent the external piping and valves from freezing. It is
recommended that hot and cold water pipes be insulated. Pipe cover enclosures may be packed with
insulation for added freeze protection.
Legend
Vacuum Breaker
Vacuum Breaker
Drain Valve
Pressure Relief Valve
Union
Check Valve
Ball Valve
Solenoid Valve
1/2 in. Normally Open Solenoid Valve
Route Drain Per Local Code
Cold Water Supply LineHot Water
Supply
Line
3/4 in. Normally Closed Solenoid Valve
Vacuum Breaker
Freeze Protection Piping Diagram
Figure 7: Freeze Protection Piping Diagram
22 Rinnai Tankless Water Heater Installation and Operation Manual
4.3.6 Clearances
Location Clearances to Combustibles
and Non-combustibles
Top 2 in. (51 mm)
0 in. from vent components
Bottom/Ground 12 in. (305 mm)
Front 0 in.
Clearance for servicing is 24 in. (610 mm)
in front of water heater
Back 0 in.
Sides (Left and Right) 2 in. (51 mm)
Add 0.25 in. (6.35 mm) for recess box
Vent
(Internal/Indoor Models)
0 in.
Front Exhaust
(External/Outdoor Models)
24 in. (610 mm)
Side
Top Top
Side
BottomBottom
FrontFront
Figure 8: Clearances
Table 6: Clearances
Internal (Indoor) Models External (Outdoor) Models
Rinnai Tankless Water Heater Installation and Operation Manual 23
4.3.7 Installation Location Checklist
Use this checklist to ensure you have selected the correct location for the water heater.
□The water heater is not exposed to corrosive compounds in the air.
□The water heater location complies with the required clearances.
□The planned combustion air and exhaust termination locations meet the required
clearances.
□The water supply does not contain chemicals or exceed total hardness that will damage
the heat exchanger.
□A standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet (for internal/indoor
models) or other 120 VAC, 60 Hz source is available.
□The installation must conform with local codes or, in the absence of local codes, with
the National Fuel Gas Code, ANSI Z221.3/NFPA 54 Natural Gas and Propane , or the
Installation Code, CSA B149.1
24 Rinnai Tankless Water Heater Installation and Operation Manual
3. Insert the top bracket into the wall mounting
bracket. Make sure the wall mounting bracket
is attached to the wall and can hold the weight
of the water heater before you fully let go.
4.4 Mount the Water Heater to the Wall
4.4.1 Mount the Internal
(Indoor) Water Heater
You Will Need:
• Rinnai Tankless Water Heater
(Internal/Indoor Model)
• Wall Mounting Bracket
Supplied by Installer:
• Level
• -4 Screws for mounting bracket installa
tion
Use appropriate screws for type of wall
constructions.
Instructions:
1. Hold the wall mounting bracket up against
the wall and use a level to make sure the
bracket is even. Proper installation requires
the water heater to be level.
2. Use four screws to secure the wall mounting
bracket to the wall (two screws on the far left
side and two screws on the far right side).
Use the appropriate screws for the wall
construction to secure the mounting bracket
to the wall between two studs.
Figure 11: Mount the top bracket
Figure 9: Level the bracket
Figure 10: Secure the bracket
Rinnai Tankless Water Heater Installation and Operation Manual 25
4. Securely screw the top and bottom brackets
into the wall, making sure the screws are
ush with the wall.
• -Use any of the holes in the top and bot
tom brackets.
• -Make sure the securing method is su
cient to support the weight of the water
heater. Refer to the water heater weight
in section “3.4 Specications.”
Top Bracket
Bottom
Bracket
4.4.2 Mount the External
(Outdoor) Water
Heater to the Wall
You Will Need:
• Rinnai Tankless Water Heater
(External/Outdoor Model)
Supplied by Installer:
• Level
• Screws for top and bottom bracket instal-
lation
Use appropriate screws for type of wall
construction.
Instructions:
1. Securely screw the top and bottom brackets
into the wall, making sure the screws are
ush with the wall.
• -Use any of the holes in the top and bot
tom brackets.
• -Use a level (placed horizontally or ver
tically) to make sure the water heater is
straight. Proper operation requires the
water heater to be level.
• -Make sure the securing method is su
cient to support the weight of the water
heater. Refer to the water heater weight
in section “3.4 Specications.”
Figure 12: Mount the bottom bracket
Figure 13: Mount the water heater
The water heater must be installed in an
upright position. Do not install the water
heater upside down or on its side.
IMPORTANT
The water heater must be installed in an
upright position. Do not install the water
heater upside down or on its side.
IMPORTANT
26 Rinnai Tankless Water Heater Installation and Operation Manual
4.5 Vent the Water Heater
4.5.1 Guidelines
• Internal water heaters can be installed
as direct vent or non-direct vent applica-
tions.
• When installed as Direct Vent, refer to
the “Direct Vent Approved Vent Manufac-
turers and Products” section (within sec-
tion “4.5.4 1. Direct Vent”) for a complete
list of approved vent manufacturers and
products.
• When installed as Non-Direct Vent
(Room Air), the vent must be Category
IV, listed by a national recognized testing
agency or schedule 40 PVC when ac-
cepted by local codes.
• Exhaust must be directly vented to the
outside. Combustion air can be provided
from outside (Direct Vent) or from room
air (Non-Direct Vent).
• If using room air (non-direct vent) for
combustion, ensure the required volume
of indoor air is available according to the
National Fuel Gas Code, ANSI Z223.1/
NFPA 54.
• Avoid dips or sags in horizontal vent
runs by installing supports per the vent
manufacturer’s instructions.
• Support horizontal vent runs every 4 ft
(1.2 m) and all vertical vent runs every 6
ft (1.83 m) or as per vent manufacturer’s
instructions or local code requirements.
• Venting should be as direct as possible
with a minimum number of pipe ttings.
• For manufactured vent systems, vent
connections must be rmly pressed
together so that the connections form an
air tight seal. Follow the venting manu-
facturer’s instructions.
• Refer to the PVC/CPVC manufacturer
for appropriate ttings, solvents or join-
ing methods.
• The vent piece connected to the water
heater must be secured with 1 self-tap-
ping screw.
• -Refer to the instructions of the vent sys
tem manufacturer for component assem-
bly instructions.
• If the vent system is to be enclosed, it is
suggested that the design of the enclosure
shall permit inspection of the vent system.
The design of such enclosure shall be
deemed acceptable by the trained and
qualied professional or the local inspec-
tor.
• Any issues resulting from improper vent
installation will not be covered by warranty.
• DO NOT use cellular core PVC/CPVC.
• DO NOT use Radel or galvanized material
to vent this appliance.
• DO NOT cover non-metallic vent pipe and
ttings with thermal insulation.
• DO NOT combine vent components from
dierent manufacturers.
• DO NOT reduce the vent diameter. Vent
diameter cannot be less than 2 in. (51
mm).
• DO NOT connect the venting system with
an existing vent or chimney.
• DO NOT common vent with the vent pipe
of any other manufacturer’s water heater
or appliance. Rinnai water heaters can
only be common vented with Schedule
40 PVC/CPVC or with a Rinnai certied
common vent system.
WARNING
Rinnai Tankless Water Heater Installation and Operation Manual 27
4.5.2 Venting Installation
Sequence
1. Install the water heater.
2. Determine the termination method—
horizontal or vertical, concentric, or twin
pipes, etc.
3. Determine proper location for wall or roof
penetration for each termination.
4. Install termination assembly as described
in this manual or in the vent manufacturer’s
installation instructions.
5. Install air and vent piping from water heater
to termination.
6. Slope horizontal exhaust run towards the
water heater 1/4 in. per foot. DO NOT slope
combustion air pipe towards water heater.
7. Install vent supports and brackets allowing
for movement from expansion, or as per
vent manufacturer’s instructions or local
code requirements.
8. Install vent screen (supplied with water
heater) on PVC combustion air and exhaust
termination elbows as illustrated below.
• -Press vent screen inside of termina
tion piece/elbow.
• Secure vent screen to the elbow with
screw provided.
4.5.3 Termination
Considerations
Check to determine whether local codes
supersede the following clearances:
• Avoid termination locations near a dryer
vent.
• Avoid termination locations near com-
mercial cooking exhaust.
• Avoid termination locations near any air
inlets.
• You must install a vent termination at
least 12 in. above the ground or antici-
pated snow level.
The vent for this appliance shall not terminate:
• Over public walkways.
• Near sot vents or crawl space vents or
other areas where condensate or vapor
could create a nuisance or hazard or
cause property damage.
• Where condensate or vapor could cause
damage or could be detrimental to the
operation of regulators, pressure relief
valves, or other equipment.
Listed below are important considerations
for locating vent termination under a sot
(ventilated or unventilated or eave vent; or to a
deck or porch):
• Do not install vent termination under a
sot vent such that exhaust can enter
the sot vent.
• Install vent termination such that exhaust
and rising moisture will not collect under
eaves. Discoloration to the exterior of the
building could occur if installed too close.
• Do not install the vent termination too
close under the sot where it could
present recirculation of exhaust gases
back into the combustion air part of the
termination.
Figure 14: Vent Screen
28 Rinnai Tankless Water Heater Installation and Operation Manual
4.5.4 Venting Options
Three types of venting options are available:
1. Direct Vent (Concentric Pipe and Twin Pipe)
2. Non-Direct Vent (Room Air and External)
3. Common Vent (Indoor Unit Only. Direct Vent and Non/Direct/Room Air Vent)
Concentric Pipe
Combustion air and exhaust
vent directly through a single
concentric connection. Hot
exhaust exits through the interior
tube, while combustion air enters
through the outer layer.
Twin Pipe
Combustion air and
exhaust vent directly
through separate
penetrations.
Room Air
Room air is used for combustion
while exhaust vents to the
outside.
External (Outdoor)
External (outdoor) water
heater.
Direct Vent
Multiple water heaters sharing a combustion
air header and a separate exhaust header that
vents directly through separate penetrations to
the outside.
Non-Direct (Room Air) Vent
Multiple water heaters using room air for
combustion while sharing an exhaust header
that vents directly to the outside.
Figure 15: Concentric Pipe Figure 16: Twin Pipe
Figure 17: Room Air Figure 18: External
Figure 20: Common Vent, Room Air
Figure 19: Common Vent, Direct Vent
Rinnai Tankless Water Heater Installation and Operation Manual 29
1. Direct Vent (Concentric Pipe and Twin Pipe)
Direct Vent Approved Vent Manufacturers and Products
Following is a list of vent components and terminations for Direct Vent installations. Install the correct
venting for your model according to the venting manufacturer’s instructions and the guidelines below. The
information below is correct at time of publication and is subject to change without notice. Contact the
vent manufacturer for questions related to the vent system, products, part numbers and instructions.
Manufacturer Phone Web Site
Ubbink www.rinnai.us800-621-9419
Centrotherm www.centrotherm.us.com877-434-3432
Heat-Fab www.heatfab.com800-772-0739
Metal Fab www.metal-fabinc.com800-835-2830
IPEX U.S.: 800-463-9572
Canada: 866-473-9462
www.ipexamerica.com
www.ipexinc.com
DuraVent 800-835-4429 www.duravent.com
Royal www.royalbuildingproducts.com800-232-5690
Ecco Manufacturing www.eccomfg.com877-955-4805
DiversiTech www.diversitech.com800-995-2222
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
2 in. /4 in. CONCENTRIC VENT TERMINATIONS
UBBINK
US/Canada
229031/229012NPP
229032/229013NPP
2/4 Condensing Horizontal Termination Kit 12 in.
2/4 Condensing Horizontal Termination Kit 21 in. 5
224359/224356NPP 2/4 Condensing Roof Discharge Termination 20
in. above roof 5
710202NPP 2/4 Condensing 90 Degree Diverter Nose (Use
with Wall Terminal) 5
710215NPP 2/4 Condensing 45 Degree Diverter Nose (Use
with Wall Terminal) 5
IPEX
1906005, 197040
FGV Concentric Vent Kit (16 in. length) 20
1906005PVC
(Order from Rinnai)
196105, 197033
FGV Concentric Vent Kit (28 in. length) 20
196105PVC
(Order from Rinnai)
196125
FGV Concentric Vent Kit (40 in. length) 20
196125PVC
(Order from Rinnai)
Table 7: Approved Vent Manufacturers
Table 8: Approved Vent Products
30 Rinnai Tankless Water Heater Installation and Operation Manual
1. Direct Vent (Concentric Pipe and Twin Pipe)
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
2 in. /4 in. CONCENTRIC VENT TERMINATIONS (continued)
ROYAL
52CVKGS6502 PVC Concentric Vent Kit 2 in. x 16 in. 20
52CVKGVS6502-28 PVC Concentric Vent Kit 2 in. x 28 in. 20
52CVKGVS6502-40 PVC Concentric Vent Kit 2 in. x 40 in. 20
CENTROTHERM
ICRT2439 2 in. x 4 in. Concentric Roof Termination 20
DURAVENT
2PPS-VKL/VK-TCL 2 in. x 4 in. Vertical Termination Cap-Kit
Concentric 20
2PPS-HKL 2 in. x 4 in. Horizontal Termination
Kit-Concentric 20
ECCO
190288 2 in. x 4 in. Concentric Horizontal
Termination 5
190295 2 in. x 4 in. Concentric Vertical
Termination 5
DIVERSITECH
CVENT-2 2 in. Concentric Vent (Termination) 20
Rinnai Tankless Water Heater Installation and Operation Manual 31
1. Direct Vent (Concentric Pipe and Twin Pipe)
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
3 in. /5 in. CONCENTRIC VENT TERMINATIONS
UBBINK
223174PP
223176PP
223177PP
3/5 Condensing Horizontal Termination Kit 12 in.
3/5 Condensing Horizontal Termination Kit 21 in. 5
223186PP 3/5 Condensing Horizontal Diverter Termination
Kit 19 in. 16
224047PP 3/5 Condensing Raised Horizontal Termination
Kit 24
184162PP 3/5 Condensing Roof Discharge Termination 20
in. above roof 5
IPEX
196006, 197009
FGV Concentric Vent Kit 3 in. x 20 in. 20
196006PVC
(Order from Rinnai)
196106, 197107
FGV Concentric Vent Kit 3 in. x 32 in. 20
196106PVC
(Order from Rinnai)
196116, 197117
FGV Concentric Vent Kit 3 in. x 44 in. 20
196116PVC
(Order from Rinnai)
ROYAL
52CVKGVS6503(PVC)/
52CVKGVSF9003(CPVC) PVC/CPVC Concentric Vent Kit 3 in. x 20 in. 20
52CVKGVS6503-32(PVC)/
52CVKGVSF9003-32(CPVC) PVC/CPVC Concentric Vent Kit 3 in. x 32 in. 20
52CVKGVS6503-44(PVC)/
52CVKGVSF9003-44(CPVC) PVC/CPVC Concentric Vent Kit 3 in. x 44 in. 20
HEAT-FAB
SC03HT Horizontal Termination Adapter 20
SC03VT Vertical Termination Adapter 20
CENTRO
THERM
ICRT3539 3 in./5 in. Concentric Roof Termination PPs-UV 20
32 Rinnai Tankless Water Heater Installation and Operation Manual
1. Direct Vent (Concentric Pipe and Twin Pipe)
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
3 in. /5 in. CONCENTRIC VENT TERMINATIONS (Continued)
METAL-FAB
3CGRLSV Vertical Adapter 1
3CGRLSH Horizontal Adapter 6
3CGRVT Vertical Termination 5
3CGRHT 3 in. x 5 in. Vertical Termination Cap Kit-
Concentric 16
DURAVENT
3PPS-VKL/VK-TCL 3 in. x 5 in. Vertical Termination Cap Kit-
Concentric 20
3PPS-HKL 3 in. x 5 in. Horizontal Termination Kit-
Concentric 20
ECCO
190388 3 in. x 5 in. Concentric
Horizontal Termination 5
190395 3 in. x 5 in. Concentric Vertical Termination 5
DIVERSITECH
CVENT-3 3 in. Concentric Vent (Termination) 20
34 Rinnai Tankless Water Heater Installation and Operation Manual
1. Direct Vent (Concentric Pipe and Twin Pipe)
Manufacturer
Manufacturer
Part number
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
3 in. TWIN PIPE TERMINATIONS
CENTROTHERM
ISELL0387UV 63 in. 87° Long PPS-UV
ISTT0320 3 in. Termination Tee 6
ISLPT0303 3 in. Low Prole Wall Termination 5
DURAVENT
3PPS-HTPL 3 in. Twin Pipe Termination 10
3PPS-HSTL 3 in. Single Horizontal Termination 5
3PPS-TBL 3 in. Black UV Resistant Tee 6
IPEX
196985
FGV PVC Low Prole Termination Kit 5
196985PVC
(Order from Rinnai)
081219 FGV PVC Wall Termination Kit 16
ROYAL
52SWVKGVS6503 PVC Side Wall Vent Kits 5
52WTVKGVS6503 PVC Wall Vent Kits 16
DIVERSITECH
HVENT-3 3 in. Low Prole Horizontal Vent Kit 5
Rinnai Tankless Water Heater Installation and Operation Manual 35
Approved PVC/CPVC Vent and Air Piping Material
Item Material
Standard for Installation in North America
United States Canada
Thermoplastic Piping Materials
Vent or Combustion Air
Intake Pipe and Fittings
PVC Schedule 40 ANSI/ASTM D1785
Thermoplastic vent pipe
must be certied to ULC
S636. Intake pipe may be
of the materials listed in
this table.
PVC-DWV ANSI/ASTM D2665
CPVC Schedule 40 ANSI/ASTM F441
PVC Pipe Cement and
Primer
PVC ANSI/ASTM D2564
CPVC Schedule 40 ANSI/ASTM F493
Non-Metallic Vent Material
ABS ASTM-D2661 or CSA B181.1 NOT PERMITTEDSCH 40 DWV
PVC Vent Screens
Termination Vent Screens Polyethylene
• 2 in. Vent Screens (included in carton box) (IPEX
Part Number: 196050)
• 3 in. Vent Screens (IPEX Part Number: 196051)
Exhaust piping must be of solid core material. Refer to the PVC/CPVC manufacturer for appropriate
ttings, solvents or joining methods.
Table 12: Approved Venting Materials By Manufacturer
Manufacturer Vent Material
Ubbink PVC (Outer Vent), Polypropylene (Inner Vent)
Centrotherm Polypropylene
Heat-Fab Metal
Metal Fab Metal
IPEX PVC/CPVC
DuraVent Polypropylene
Royal PVC
ECCO Manufacturing Polypropylene
DiversiTech PVC/CPVC
Table 11: Approved PVC/CPVC Vent and Air Piping Material
Product
Description
Diagram
Horizontal
Vertical
Equivalent
Length (ft)
Vent Screen N/A
Tee 5
90° Elbow 5
45° Elbow 2.5
Table 9: Various 2 in. or 3 in. Schedule 40 PVC/
CPVC Terminations
Acceptable Acceptable Not
Acceptable
90° Elbows,
Long Sweep
90° Elbows,
Short Sweep
90° Elbows,
Close Turn
Table 10
38 Rinnai Tankless Water Heater Installation and Operation Manual
Concentric Pipe: Installation
Instructions
1. Remove and discard screw from concentric
ue connection.
2. Remove exhaust adapter ring (discard for
concentric venting congurations.)
3. Install the concentric vent. Ensure it is properly
seated.
4. Secure the vent pipe to the concentric ue
connection with the supplied screw.
Concentric
Vent
Mount Concentric Pipe Through Wall
If venting through an exterior wall, align the wall
mounting bracket template (located in literature
bag) to the wall and follow instructions on the
template for appropriate vent hole location. Use
a level to make sure the wall mounting bracket is
even and level.
Wall Mounting
Bracket Template
Level
Wall Mounting
Bracket
Table 14: Concentric Pipe: Vent Applications
Horizontal Wall Terminations
2 in. x 4 in.
3 in. x 5 in.
Vertical Roof
Terminations
2 in. x 4 in.
and
3 in. x 5 in.
Table 15: Concentric Pipe: Maximum Vent Length
Concentric Vent Maximum Equivalent Length
Vent Sizes 2 in. x 4 in. 3 in. x 5 in.
Vent Lengths 65 ft (20 m) 150 ft (46 m)
• 45° elbow is equivalent to 3 ft (1 m)
• 90° elbow is equivalent to 6 ft (2 m)
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Install the venting termination according to the
diagrams and instructions in this manual. Slope
the venting 1/4 in. per foot toward the appliance
according to the vent manufacturer’s installation
instructions. Dispose of condensate per local
codes.
IMPORTANT
Rinnai Tankless Water Heater Installation and Operation Manual 39
1. Direct Vent (Twin Pipe)
Twin Pipe Overview
Combustion air and exhaust vent directly through separate penetrations.
Twin Pipe Termination Clearances
Exhaust
12 in. (0.30 m)
minimum above
combustion air
opening
12 in. (0.30 m)
minimum 12 in. (0.30 m)
minimum
Combustion
Air
12 in. (0.30 m) above
grade or anticipated
snow level
Roof
Indicates area in which intake cannot be installed.
Intake
60 in.
min
12 in.
min
12 in.
min
12 in.
min
12 in.
min
12 in.
min
Intake
Exhaust
Figure 31
Figure 32: Twin Pipe Vertical
Termination of Multiple Water Heaters
Figure 33: Horizontal Vent and Combustion
Air Piping
Minimum clearance for
Ground/Grade/Snow Level
40 Rinnai Tankless Water Heater Installation and Operation Manual
1. Direct Vent (Twin Pipe)
Twin Pipe Installation Instructions
The water heater is equipped with a 2 in. (51 mm)
pipe connection. With the use of a pipe reducer,
installers can use a 3 in. (76 mm) pipe for the
combustion air and exhaust.
1. Remove and discard the screw from the
combustion air vent connection.
2. Remove and discard the combustion air vent
cap.
3. Install the combustion air vent pipe. Ensure it
is properly seated.
Secure the combustion air vent pipe to the
combustion air vent connection with the
supplied screw.
4. Install the exhaust vent pipe. Ensure it is
properly seated.
Secure the exhaust vent pipe to the exhaust
adapter ring with the supplied screw.
Combustion Air Vent Pipe
Supplied screw
Exhaust Vent Pipe
DO NOT apply
PVC glues,
solvents, or cleaners to the water heater’s
combustion air or exhaust gasket
connections. Failure to correctly assemble
the components according to these
instructions may result in property
damage, personal injury, or death.
Supplied screw
Figure 34
Figure 35
Figure 36
Figure 37
WARNING
Rinnai Tankless Water Heater Installation and Operation Manual 41
This conguration requires the use of a Concentric Vent
Termination
2 in. or 3 in. PVC/
CPVC IPEX/ Royal
Concentric Side Wall
Termination Conguration
This conguration requires the use of a Concentric Vent
Termination
2 in. or 3 in. PVC/CPVC
IPEX/ Royal Concentric Vertical
Termination Conguration
2 in. or 3 in. Schedule
40 PVC/CPVC or ABS Snorkel
Termination Conguration
2 in. or 3 in. Schedule 40
PVC/CPVC or ABS Standard
upside down “U” Vertical
Termination Conguration
2 in. or 3 in. Schedule
40 PVC/CPVC or ABS Elbow
or Tee Side Wall
Termination Conguration
2 in. or 3 in. Schedule
40 PVC/CPVC or ABS Tee
Vertical Termination
Conguration
2 in. or 3 in. PVC
Low Prole Termination
Conguration
Exhaust and
combustion air
MUST NOT be
brought together
into a single
PVC pipe using
a pipe tting.
1. Direct Vent (Twin Pipe)
Twin Pipe Example Vent Applications
Slope horizontal exhaust 1/4 in. per foot towards the water heater. DO NOT slope combustion air pipe
towards the water heater.
Single
Pipe
Combustion
Air Exhaust
Twin Pipe Maximum Vent Length
Table 17: Twin Pipe Maximum Equivalent Length
Vent Sizes 2 in. (51 mm) 3 in. (76 mm)
Vent Lengths 65 ft (20 m) 150 ft (46 m)
• 45° elbow is equivalent to 3 ft (1 m)
• 90° elbow is equivalent to 6 ft (2 m)
Table 16
WARNING
42 Rinnai Tankless Water Heater Installation and Operation Manual
2. Non-Direct Vent (Room Air and External)
Room Air and External Termination Clearances
Canadian Installations1
(CSA B149.1)
U.S. Installations2
(ANSI Z223.1/NFPA 54)
Ref Description Other than direct vent
(Outdoor unit and/or Room Air)
Other than direct vent
(Outdoor unit and/or Room Air)
AClearance above grade, veranda, porch, deck, or balcony 12 in. (30 cm) 12 in. (30 cm)
B Clearance to window or door that may be opened 36 in. (91 cm)
4 ft (1.2 m) below or to side of
opening; 1 ft (300 mm) above opening
C * *Clearance to permanently closed window
DVertical clearance to ventilated sot, located above the terminal within
a horizontal distance of 2 ft (61 cm) from the center line of the terminal * *
E * *Clearance to unventilated sot
F * *Clearance to outside corner
G *Clearance to inside corner 12 in.
HClearance to each side of center line extended above meter/regulator
assembly
3 ft. (91 cm) within a height 15 ft.
(4.6 m)
*
I *Clearance to service regulator vent outlet 3 ft. (91 cm)
JClearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance 36 in. (91 cm) 4 ft (1.2 m) below or to side of
opening; 1 ft (300 mm) above opening
KClearance to a mechanical air supply inlet 6 ft (1.83 m) 3 ft (91 cm) above if within 10 ft
(3 m) horizontally
LClearance above paved sidewalk or paved driveway located on public
property
7 ft (2.13 m) [1]
Vents for Category II and IV
appliances cannot be located above
public walkways or other areas where
condensate or vapor can cause a
nuisance or hazard.
M *Clearance under veranda, porch, deck, or balcony 12 in. (30 cm) [2]
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that is
located between two single family dwellings and serves both dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a minimum
of two sides beneath the oor.
*Clearances are in accordance with local installation codes
and the requirements of the gas supplier. (Dégagement
conforme aux codes d’installation locaux et aux exigences
du foumisseur de gaz.)
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
Regulator vent outlet
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
X
V
Figure 38: Room Air and External Termination Clearances
Notes: 1In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
2In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
Table 18
I
If locally adopted installation codes specify clearances dierent than those illustrated, then the most stringent clearance shall prevail.
44 Rinnai Tankless Water Heater Installation and Operation Manual
Combustion air must be free of corrosive chemicals. Do not provide combustion air from
corrosive environment. Appliance failure due to corrosive air is not covered by warranty.
IMPORTANT
Room Air: Combustion Air
This water heater requires adequate combustion air for ventilation
and dilution of ue gases. Failure to provide adequate combustion
air can result in unit failure, re, explosion, serious bodily injury or death. Use the following
methods to ensure adequate combustion air is available for correct and safe operation of
this water heater.
For applications containing corrosive indoor air, this appliance must be installed as direct vent. DO
NOT use room air in applications where combustion air contains acid forming chemicals such as
sulfur, uorine and chlorine. These chemicals have been found to cause rapid damage and decay and
can become toxic when used as combustion air in gas appliances. Such chemicals can be found in,
but not limited to bleach, ammonia, cat litter, aerosol sprays, cleaning solvents, varnish, paint and air
fresheners. Do not store these products or similar products in the vicinity of this water heater.
Unconned Space
An unconned space is dened in National Fuel Gas Code, ANSI Z223.1/NFPA 54 as “a space whose
volume is not less than 50 cubic feet per 1000 Btu/hr (4.8 m³ per kW per hour) of the aggregate input
rating of all appliances installed in that space. Rooms communicating directly with the space in which
the appliances are installed, through openings not furnished with doors, are considered a part of the
unconned space.” If the “unconned space” containing the appliance(s) is in a building with tight
construction, additional outside air may be required for proper operation. Outside air openings should
be sized the same as for a conned space.
Conned Space
A conned space is dened in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 as “a space
whose volume is less than 50 cubic feet per 1000 Btu/hr (4.8 m³ per kW per hour) of the aggregate
input rating of all appliances installed in that space.” Examples include a small room, closet, alcove,
utility room, etc. A conned space must have two combustion air openings. Size the combustion air
openings based on the BTU input for all gas utilization equipment in the space and the method by
which combustion air is supplied.
Using Indoor Air For Combustion: When using air from other room(s) in the building, the total volume
of the room(s) must be of adequate volume (Greater than 50 cubic feet per 1000 Btu/hr). Combustion
air openings between joining rooms must have at least 1 square inch of free area for each 1000 Btu/h,
but not less than 100 square inches each.
Using Outdoor Air For Combustion
Outdoor air can be provided to a conned space through two permanent openings, one commencing
within 12 in. (0.30 m) of the top and one commencing within 12 in. (0.30 m) of the bottom, of the
conned space. The openings shall communicate to the outside by one of two ways.
When communicating directly with the outdoors through horizontal ducts, each opening shall have
a minimum free area of 1 in2/2000 Btu/hr (1100 mm²/kW) of total input rating of all appliances in the
conned space.
WARNING
If ducts are used, the cross sectional area of the duct must be greater than or equal to the required
free area of the openings to which they are connected.
NOTE
Produkt Specifikationer
| Mærke: | Rinnai |
| Kategori: | Kedler & kedler |
| Model: | RSC160iN |
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