pag. 21
4.5 H
2
O/COMPACT POWER BOARD DIAGRAM
Receiver
board
Smoke exhaust
Code selector for room
temperature thermostat
managed by radio waves
Contr
ol panel
Burner motor
Thermostat
100°C reset
Pellet feed motor
Heating element
Common
n.o. (normally open)
Motorised boiler tube SV
valve circulating pump
Plant circulating
pump
Additional circulating
pump
220-240 V
50 Hz
Boiler
PTC
sensor
Smoke side
pr
essur
e switch
Radio receiver
antenna
Pressure
transducer
Fuse 3.15 A
Fuse 3.15
A
Fuse 1A
3 way motorised valve
must have spring return
4.6 H
2
0/COMPACT ROOM TEMPERATURE THERMOSTAT
The room temperature thermostat is supplied with the appliance. The display A indicates
the temperature set by the user. This value can be changed by means of the controls B and
C. The display D indicates the room temperature detected by the thermostat. The signal is
transmitted by radio waves. The unit is powered by the 220-12V transformer supplied with
the heater. The thermostat may be affixed to a wall (see drawing on the right) or in any
other area as long as it is installed approximately 1.5 metres from the floor, away from heat
sources, windows and any other object which could affect the correct room temperature
value. The thermostat should be installed no further than 10 metres from the appliance
for normal operation. Clean the surfaces thoroughly before fixing the velcro to the them.
The room temperature thermostat detects the temperature and updates it roughly every 30
seconds.
When the room temperature reaches the temperature
set on the thermostat the appliance displays a
blinking black bar indicating the minimum power
level. At that point the power increase operations are disabled. In this phase the
appliance shuts off (according to the manual or automatic cycle previously selected)
if the set point temperature of 76°C is reached in the boiler.
If the power supply to the thermostat or the transmission is cut off, normal operation
restarts from the control panel after 5 minutes.
INSTALLATION
