Watts PLT-5 Manual

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PLT-5 PLT-12 PLT-20

Order No. Order No. Order No.

Description 0067370 0067371 0067372

Max. Pressure - psi 150 150 150

Max. Temp. - °F 200 200 200

Tank Volume - gal. 2.1 4.5 8.5

Tank Acceptance - gal. 1.26 2.8 3.4

Air Pre-charge - psi 20 20 20

Connections Size - in.

⁄4 male

Diameter - in. 8 10.5 12

⁄2

Length - in. 11 13.5 19

⁄16

Weight - lbs. 5.5 10 15

Models: PLT-5, PLT-12, PLT-20

Potable Hot Water Expansion Tank

Installation Instructions

Certified to ANSI/NSF 61

(73°F/23°C)

Listed by IAPMO

Acceptance Volume

Air Side Water Side Volume at 150psi

Pre-pressure (10.3 bar) (gallons)

(psi) (bar) PLT-5 PLT-12 PLT-20

20 (1.4) 1.48 3.42 7.102

40 (2.8) 1.26 2.88 5.882

60 (4.1) 1.0 2.49 4.705

80 (5.5) .80 1.85 4.009

Figure 1

(Optional Location)

Support Tank

in Optional

Horizontal

Position

(Optional Location)

Watts

Pressure

Gauge

Watts

Backflow Preventer

Water

Supply

Watts

Shutoff

Valve

Watts Pressure

Reducing Valve

Expansion

Tank

Water

Heater

To System

Watts

T&P

Safety

Relief

Valve

Floor Drain

Discharge Line

IS-PLT

W A R N I N G !

Improper installation, adjustment, alteration, service or maintenance can cause property dam-

age, serious bodily injury or death. Read instructions completely before proceeding with instal-

lation. Only qualified personnel may install or service this equipment in accordance with local

codes and ordinances.

Do not exceed 80psi (5.5 bar) air charge. Air charge pressure exceeding 80psi (5.5 bar) could

become hazardous and will void any and all warranties, either written or implied. Failure to fol-

low these instructions will result in the possibility of property damage, serious bodily injury

or death.

This Expansion Tank is designed and intended for water storage at a maximum pressure of

150psi (10.3 bar) and a maximum temperature of 200°F (93ºC). Any use other than for potable

water or a sustained or instantaneous pressure in excess of 150psi (10.3 bar) or 200°F (93ºC)

is UNSAFE and can cause property damage, serious bodily injury or result in death.

Disclaimer: The manufacturer of this tank does not accept any liability or other responsibility for

personal injury or property damage resulting from improper use, installation or operation of this tank

or the system of which it is a part.

Notice: The expansion tank, piping and your connections may in time leak. Select a location

to install the expansion tank where a water leak will not damage the surrounding area. The manu-

facturer is not responsible for any water damage in connection with this expansion tank.

Installation

1. Before beginning installation determine the system pressure.

a. Open a faucet to allow the system pressure to equalize.

b. Close faucet.

c. Read the system pressure at the pressure gauge (Figure 1).

2. The expansion tank pre-charge must be set to the system pressure as

determined in Step 1. Pre-charge prior to installation in the system.

Caution: Pre-charge prior to installation in the system.

Do not adjust the air pre-charge of the expansion tank

with the system under pressure. The air pre-charge

should only be adjusted under zero system pressure.

Note: The normal pre-charge is 20psi (138 kPa).

Do not exceed 80psi. If system pressure exceeds

80psi (5.5 bar) it will be necessary to either: Add a A.

pressure reducing valve to the system or, Locate the B.

expansion tank in a riser where the static pressure is

below 80psi (5.5 bar).

a. Unscrew the protective cap from the air inlet valve.

b. Using a tire pressure gauge, check the tank pre-charge pressure.

c. If necessary, pressurize the tank to the proper setting using a manual

bicycle tire pump. Caution do not exceed 80psi.

d. Replace the protective air cap.

3. Shut off the water supply valve.

4. Shut off power source to the water heater, (electricity, gas, oil burner

switch) and drain system following water heater manufacturer

recommendations.

5. Install the expansion tank in the system (refer to Figure 1).

a. The weight of the expansion tank filled with water is supported by

the system piping. Therefore, it is important that, where appropriate,

the piping has suitable bracing (strapping, hanger, brackets).

b. The expansion tank may be installed vertically (preferred method)

or horizontally. Caution: The tank must be properly supported

in horizontal applications.

c. This expansion tank, as all expansion tanks, may eventually leak.

Do not install without adequate drainage provisions.

6. Turn on the water supply valve.

7. Open a hot water fixture and allow water flow until all air is removed from

the system.

8. Reapply power to the water heater.

9. Open a hot water fixture to allow a slight flow until the hot water has

reached operating temperature.

10. Recheck system pressure following Step 1.a through c.

Caution: Pre-charge prior to installation in the sys-

tem. Do not adjust the air pre-charge of the expan-

sion tank with the system under pressure. The air

pre-charge should only be adjusted under zero sys-

tem pressure.

If necessary, adjust the pressure reducing valve to the

expansion tank pre-charge as determined in Step 2.

Important!

• A pressure relief valve sized and installed in accor-

dance with local codes must be incorporated in

the systems requiring a combined temperature

and pressure safety relief valve. The temperature

and pressure safety relief valve should be sized

and installed in accordance with local codes.

• Never plug a safety Relief Valve.

Figure 1

(Optional Location)

Support Tank

in Optional

Horizontal

Position

(Optional Location)

Watts

Pressure

Gauge

Watts

Backflow Preventer

Water

Supply

Watts

Shutoff

Valve

Watts Pressure

Reducing Valve

Expansion

Tank

Water

Heater

To System

Watts

T&P

Safety

Relief

Valve

Floor Drain

Discharge Line

Air Inlet Valve

USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com

Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca

Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of

original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER

WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special

or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting

from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no

control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above

limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to

determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF