37
EN
Cod. 3541Z090 - Rev. 05 - 05/2022
IDOLA S 3.2
TBH - Electrical heater for DHW boiler
ATCO
TCO
A1
A2
Power supply
(TBH)
13
16
CN11
25 26
1
2 3 4 5
6
7 8 9 10
CN30
CN7
27
29 30 31 32
28
fig. 29 -
H-L1-C - For room thermostat (high voltage)
There are three methods for connecting the thermostat.
•
Room thermostat method A (mode set control)
To activate this function set the service parameter 6.1 “Room thermostat” = 1
(mode setting) refer to “9.2 Service parameters table" on page 51.
A.1
When unit detect voltage is 230VAC between C and L1 ,the unit operates in
the cooling mode.
A.2
When unit detect voltage is 230VAC between H and L1, the unit operates in
the heating mode.
A.3
When unit detect voltage is 0VAC for both side(C-L1, H-L1) the unit stop work-
ing for space heating or cooling.
A.4
When unit detect voltage is 230VAC for both side(C-L1, H-L1) the unit working
in cooling mode.
RT1
COOL(C)
POWER
IN
HEAT(H)
Method A
3
15
4
CN11
25 26
1
2 3 4 5
6
7 8 9 10
CN7
CN30
27 28
29 30 31 32
15
3 4
L1
（
Mode set control
）
fig. 30 -
•
Room thermostat method B (one zone control)
To activate this function set the service parameter 6.1 “Room thermostat” = 2 (one
zone) refer to “9.2 Service parameters table" on page 51.
B.1
When unit detect voltage is 230VAC between H and L1, unit turns on.
B.2
When unit detect voltage is 0VAC between H and L1, unit turns off.
Method B
RT1
POWER
IN
CN11
25 26
1
2 3 4 5
6
7 8 9 10
CN7
CN30
27 28
29 30 31 32
15
3
L1
HEAT(H)
（
One zone control
）
fig. 31 -
•
Room thermostat method C (double zone control)
To activate this function set the service parameter 6.1 “Room thermostat” = 3 (dou-
ble zone) refer to “9.2 Service parameters table" on page 51.
C.1
With 230VAC voltage between H and L1, zone1 turns on. With the voltage
0VAC between H and L1, zone2 turns off.
C.2
When the voltage is 230VAC between C and L1, zone2 turns on according to
climate temp curve. With 0VAC voltage between C and L1, zone2 turns off.
C.3
With 0VAC voltage for both sides (C-L1, H-L1), the unit turns off.
C.4
With 230VAC voltage for both sides (C-L1, H-L1), both zone1 and zone2 turn
on.
CN4
S1
Method C
RT1
POWER IN
RT2
POWER IN
CN11
25 26
1
2 3 4 5
6
7 8 9 10
CN7
CN30
27 28
29 30 31 32
15
3 4
COOL(C)
HEAT(H)
L1
zone1
zone2
（
Double zone control
）
fig. 32 -
