Weil-McLain WM97+ - Wiring; Connect circulator and sensor harnesses

CWH companion water heater — Product Manual
Wiring
Electrical shock hazard — Can cause severe personal
injury, death or substantial property damage. Disconnect
power before installing and / or servicing.
Connect circulator and sensor harnesses
1. All wiring connections to the Companion Water Heater are pre-wired
and available in the WM97+ boiler lower jacket interior.
2. Remove the two plastic plugs from the WM97+ jacket bottom (see
Figure 16 or Figure 17).
3. Route the tank sensor harness and CWH circulator harness through
these openings (circulator harness through left opening, sensor through
right opening).
4.
Quick-connect connectors — Connect the harnesses to the mating
connectors in the WM97+ boiler — one for the circulator and one for
the tank temperature sensors.
a. See Figure 14 or Figure 15 for the location of the harness connec-
tors in the boiler.
b. The circulator harness must be attached to the connector in the
boiler and to the connector at the CWH circulator.
c. The CWH tank sensor harness is factory wired to the sensors in the
CWH tank. Route the harness end through the right-side opening
and attach to the sensor harness connector in the boiler.
5.
Grommets — The harnesses are fitted with grommets to seal the bot-
tom openings. Press the grommets through the openings and work
into position.
The grommets must be seated properly to prevent room air
leakage into the boiler enclosure.
Figure 14
WM97+70/110 harness connector locations
Circulator harness
connector
Sensor harness
connector
Figure 15 WM97+155 harness connector locations
Circulator harness
connector
Sensor harness
connector
CWH circulator — The CWH circu-
lator is shipped loose with the CWH
and must be installed as instructed
in this manual.
Figure 16
WM97+70 or 110 jacket bottom wire
harness openings
Plastic plugs
Circulator harness
through this hole
Sensor harness
through this hole
Figure 17 WM97+155 jacket bottom wire
harness openings
Plastic plugs
Circulator harness
through this hole
Sensor harness
through this hole
Part number 635-500-156/0113
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