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Air Handler Thermostat Wiring Block
LOW VOLTAGE/BASSE TENSION
R
W1
Y2
Y1
V/W2
Connections to the Air Handler PC Board.
Other thermostat wires removed for clarity.
1. Disconnect all power supplies.
2. Remove the air handler front panel by removing the 6 screws that secure the top panel and the 9
screws that secure the front panel.
3. Route the 120V power supply cable (field-supplied) through the power supply connection knockout
hole and connect to the air handler 120V Power Supply terminals.
4. Route the 24V thermostat cable (field-supplied) through the thermostat connection knockout hole
and connect to the air handler PC Board.
5. If installing the Domestic Priority Switch, REU-OP3 (recommended optional accessory purchased
separately), connect it to the air handler PC Board (see above image).
6. Connect the following:
A. Connect ground wire to the supplied green ground wire
B. Connect black to black and white to white power supply terminal
7. Replace the air handler access panel.
Canadian Air Handler Installation and Operation Manual
G
C
DH O
1
2
Rinnai Domestic Priority
Switch:
Rinnai REU-OPU3
(accessory installed in
Rinnai Engine)
Field Supplied
Thermostat
23
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