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
Key
16
Modulating fan
32
Heating circulating pump
42
DHW temperature sensor (see kit)
44
Gas valve
47
Modulation Regulator (24V)
72
Room thermostat (
fi
eld sourced)
81
Ignition/detection electrode
114
Water pressure switch
138
External probe (not
fi
tted)
155
Hot water tank temperature probe (
fi
eld sourced)
278
Double sensor ( Heating)
297
Air pressure transducer
370
Low Water Cutoff (LWCO) - (
fi
eld sourced)
Important
: Before connecting the
room thermostat
, remove the jumper on terminal block.
37
WIRING DIAGRAM
370 - Field Source LWCO
Summary of Contents for CHB-100
Page 6: ...Figure 2 Component Listing 6 3 GENERAL VIEW AND MAIN COMPONENTS ...
Page 33: ...33 12 RATINGS AND CAPACITIES ...
Page 38: ...KEY Part Number Description Qty A01 FE3980B830 CASING CTR 1 38 REPAIR PARTS LIST CHB 100 ...
Page 40: ...40 REPAIR PARTS LIST CHB 100 ...
Page 42: ...42 REPAIR PARTS LIST CHB 100 ...
Page 44: ...KEY Part Number Description Qty A01 FE3980B830 CASING CTR 1 44 REPAIR PARTS LIST CHB 130 ...
Page 46: ...46 REPAIR PARTS LIST CHB 130 ...
Page 48: ...48 REPAIR PARTS LIST CHB 130 ...
Page 50: ...NOTES 50 ...
Page 51: ...NOTES 51 ...
Page 52: ...ECR International Inc 2201 Dwyer Avenue Utica NY 13501 web site www ecrinternational com ...