W
TM
AquaBalance
24 Wiring diagram — WMB-155C Combi Ladder
Figure 72
WMB-155C –– Combi 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 should not
be greater than 120VAC and
3 Amp.
4.
In case of questions during
installation please contact your
local Weil-McLain distributor.
Legend
16
Blower
32
Central heating pump
42
DHW temperature sensor
44
Gas valve
72
Room thermostat (not included)
81
Ignition electrode
95
Mixing (diverting) valve
104(1) Fuse 3.15A
104 (2) Fuse 630mA
56
M
-
ALL
OUNT GAS
FIRED WATER BOILER
—
Boiler Manual
114
Water pressure switch
136
Flow meter
138
Outside temperature sensor (optional on Combi)
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