Wiring Diagram - Wmb-155H Heating Only Ladder - Weil-McLain Aqua Balance WMB-155 Manual

W
TM
AquaBalance
25 Wiring diagram — WMB-155H Heating Only Ladder
Figure 74 WMB-155H –– Heating Only Ladder Wiring Diagram
NOTES:
1. All wiring must be installed in
accordance with N.E.C. and
any other national state or local
requirements.
2. Room thermostat should be
a dry contact type and should
draw power from the control
board: should not be greater
than 24 VAC and 500 mA.
3. Max. voltage and electric cur-
rent for the LWCO + CH PUMP
+ DHW PUMP should not be
greater than 120 VAC and 3
Amp.
4. In case of questions during
installation please contact your
local Weil-McLain distributor.
Legend
16 Fan
32 Central heating pump (not included)
44 Combination gas valve
72 Room thermostat (not included)
81 Ignition electrode
104(1) Fuse 3.15A
104(1) Fuse 630mA
114 Water pressure switch
130 DHW pump (not included)
58
M -
ALL OUNT GAS FIRED WATER BOILER
—
Boiler Manual
cod. 3541M950
138 Outdoor sensor
143 DHW tank thermostat (not included)
186 Return temperature sensor
191 Exhaust temperature sensor
278 Double sensor (heating + safety)
279 Transformer 115-24 VAC
284 Relay SPST-Coil 24 VAC
370 LWCO (not included)
373 "OPENTHERM" communication (Not used)
Part number 550-100-305/0118