Wiring Diagram - ECR International CCB-150 Installation, Operation & Maintenance Manual

95
278
GND
297
+ 15V
OUT
47
72
42
114
G N D
136
O U T
+ 5 V
Important: Before connecting the room thermostat, remove the jumper on terminal block.
Key
16 Modulating fan
32 Heating circulating pump
42 DHW temperature sensor
44 Gas valve
47 Modulation Regulator
72 Room thermostat (fi eld sourced)
81 Ignition/detection electrode
95 Diverter valve

WIRING DIAGRAM

370
M
1 2
X7
370 - Field Source LWCO
138 - Optional Outdoor Sensor
138
3 4 5 6
AUX
X2
1
L
DBM34
81
1k
114 Water pressure switch
136 Flow meter
138 External probe (fi eld sourced)
278 Double sensor (Safety + Heating)
297 Air pressure transducer
370 LWCO - fi eld sourced (fi eld sourced)
38
120Vac
60Hz
L
N
44
N
16
32