Issue 1 06/02/20
15
Technical Specifications
3
3.4 Electrical Diagram
Dual safety and temperature control thermostat, manual
reset.
The control panel is equipped with a dual safety and
temperature control thermostat.
If the thermostat safety device is triggered it has to be manually
reset.
To do this the thermostat must be dismantled as indicated
below.
1. Disconnect the power supply to the tank to ensure there is
no power supply to the control panel and prevent any risk
of electric shocks.
2. Dismantle the control panel by unscrewing the four corner
screws that fix it to the tank.
3. Remove the protective front control panel.
4. Remove the temperature setting dial by pressing outwards.
5. Unscrew the two screws on the part left uncovered by the
dial. When mounting it again make sure that the position
of the screws is correct.
6. Turn the thermostat round from the back part of the control
panel without the need to disconnect any wires. On the
back part of the thermostat there is a compartment marked
with an ‘S’. Press the tab inside the compartment with a
fine object to reset the thermostat.
7. Reverse the above steps to reassemble the thermostat.
Warning
The high limit stat must always operate the zone valve
in case of over temperature.
Fig. 7
The control panel K/TD has a thermometer and a regulating
and safety thermostat.
- Pilot lights
Te°
- Thermometer
TL°
- Regulating thermostat
and safety thermostat
❄/
☼
- Summer / Winter switch
K
- External contactor
(Leave in winter position as the
summer position will disable the
heating)
❄/
☼
Te°
TL°
E L N 3 4 5 6 7 8 9 10 11
A B C D E F
O/I
TL*
Re
A
B
2
3
A1
B2
A5
A3
B6
B4
T
B
4
2
5
L N
230V 50 Hz Power Supply
DHW Primary Pump (1
amp Max)
DHW Primary Zone Valve
Fig. 8
