PT22 is digital room thermostat with backlit display for automatic regulation of heating.
Its advantages involve a quick change in the desired temperature by simply turning the wheel, and
possibility of setting up to weekly program with 6 temperature changes per day.
INSTALLATION AND LOCATION
Install the thermostat at a suitable place where its operation cannot be affected by direct fl ow of hot air
from the heater, sunshine or other disturbing effects. Do not install it on an external wall either. The instal-
lation height should be approx. 1.5 m above the fl oor. Place the thermostat in the “reference room”, such
as the living room (the heating source will switch according to the temperature in this room).
The installation must only be done by a properly qualifi ed person!
Before installation, disconnect the power supply!
1) Switch off the main circuit breaker.
2) Remove the control part from the lower cover of the device (Fig.1).
3) Chip away the central plastic piece from the lower cover to lead in conductors.
4) Run the conductor through the hole and connect it to the terminal acc. to the diagram.
5) Fasten the lower cover to the wiring box with screws (Fig. 2).
6) Batteries are located at the back of the control part. Remove their protective paper
(on fi rst use), or insert new batteries (follow the instructions on page 3).
7) Mount the control part on the lower cover.
8) Switch on the main circuit breaker and test correct connection of the thermostat, see
page 5 (TEST).
9) Upon fi rst start (or reset), the thermostat displays “SET CLOCK”, set the current time
and date according to page 4.
Wiring diagram:
Backlit display
if any button is pushed,
the backlit switches on
automatically for 5 s at
least
Control elements
turning
=change of the
temperature set
push
=choice confi rmation
(entry)
push
=
opening the main
menu or return a step
back
PT22 BOILER
*
*
potential-free
(voltage-free) contact
The thermostat terminals
are marked differently with
every type of boiler. The-
refore, follow the wiring
prescribed by the boiler
manufacturer!
