WIRING DIAGRAM: HEATMASTER® TC
1. 230 V outlet
2. On/Off switch
3. Charging pump
4. Heating circulator (optional)
5. Gas valve rectifier
6. 230 Volt - 24 Volt transformer
7. MCBA
8. Display
9. Low-water pressure switch
10. Burner PWM plug
11. Summer/winter switch
12. NTC1 flow sensor
13. NTC2 return sensor
14. NTC5 flue-gas temperature sensor
15. Room thermostat (optional)
16. NTC3 domestic hot water sensor
17. NTC4 outside temperature sensor (optional)
18. NTC6 flow sensor for second heating circuit (optional)
19. Positive terminal of the ionisation current
20. RAM high limit thermostat (optional)
21. Ignition and ionisation cable
22. 230 Volt burner power supply (HeatMaster® 70 / 85 TC only]
23. Gas pressure switch (HeatMaster® 70 / 85 TC only]
The ionisation current is measured between the terminal (19) and the
earth.
ELECTRICAL CONNECTION
Br
B
B
V
W
Y/Gr
B
Br
G
R
V
O
R
W
V
R
Bk
B
Bk
O
Br
R
Br
B
R
Br
Bk
Bk
O
Br
B
R
Bk
230V ~ 50Hz
Br
B
Br
B
B
Br
G
R
V
Bk
B
R
B
B
V
G
O
B
BUS B
BUS A
W
Br
Bk
O
Br
R
Bk
Br
G
R
Br
B
Y/Gr
Y/Gr
Y/Gr
B
W
L
N
PE
Y/Gr
B
Br
B
B
B
Y/Gr
X12.
P
P
X11.
L1
N
PE
M
M
12345678
91
01
11
21
3
123456
X1.6
X1.5
X1.4
X1.3
X1.2
X7
X10.6
X10.7
X10.1
X10.3
X1.1
X2.12
X2.11
X2.10
X2.9
X2.8
X2.7
X2.6
X2.5
X2.4
X2.3
X2.2
X2.1
X3.6
X3.5
X3.4
X3.3
X3.2
X3.1
X4.3
X4.2
X4.1
X5.4
X5.3
X5.2
X5.1
t
V
O
G
22
23
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
B. Blue
Bk. Black
Br. Brown
G.
Grey
O. Orange
R.
Red
V.
Violet
W.
White
Y/Gr. Yellow/Green
EN • 9
664Y5300 • A
E
N
FR
R
U
P
L
DE
IT
ES
N
L
