Domestic hot water sensor kit – Dunkirk DWB Series User Manual
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1k
81
32
95
278
1 4
120V
60Hz
138
5 6 7 8
3 4
1 2
16
44
N
L
138
370
95
278
T
T
297
47
114
GND
+15V
OUT
155
72
X1
X2
AUX
X4
X4
X11
X7
X5
X7
X6
X9
L
L
N
N
1
1
DBM34
10
kOhm
1,8
kOhm
M
*138 - Optional Outdoor Sensor
*155 - Optional Indirect Tank Sensor
*370 - Field Source LWCO
Key
16
Modulating fan
32
Heating circulating pump
42
DHW temperature sensor (see kit)
44
Gas valve
47
Modulation Regulator (24V)
*72 Room thermostat (field sourced)
81
Ignition/detection electrode
114 Water pressure switch
*138 Optional Outdoor Sensor (field sourced)
*155 Optional Indirect Tank Sensor
(See parts list)
278 Double sensor (Safety + Heating)
297 Air pressure transducer
*370 Low Water Cutoff (LWCO) - (field sourced)
*
*
*
NOTICE
*Important:
• Before connecting the room thermostat, remove
jumper on terminal block. ( Key 72)
• Before connecting optional Indirect Tank Sensor,
remove two resistors. (Key 155)
• Before connecting the Low Water Cutoff, remove
the jumper on terminal block. (Key 370)
*
Figure 4 - Wiring Diagram
Remove both resistors.
Wire sensor to 7 and 8.
DOMESTIC HOT WATER SENSOR KIT
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