Installation Guide

Hydronic Air Handler Installaon and Operaon Manual 25
Refer to section “4.7 Electrical Requirements”
for complete electrical requirements.
1. Disconnect all power supplies.
2. Remove the air handler access panel by
removing the 4 screws that secure the
panel.
3. Route the 120V power supply cable (field-
supplied) through the power supply
connection knockout hole and connect to
the air handler PC Board.
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
(recommended optional accessory
purchased separately), connect it to the air
handler PC Board (see following image).
8. (Optional) If you would like to change the fan
motor speed, follow the steps in section “8.2
Change Fan Motor Speed.”
9. Replace the air handler access panel.
6. Using UL listed wire nuts, connect the
field-supplied wires to the air handler
(black to black and white to white).
Note: Electrical cables go through the knockout
holes on the left or right side of the cabinet. See
the images below for specific locations.
Models: AH083P/CP, AH084P/CP,
AH125P/CP, AH166P/CP
Left Side
Right Side
Power
Supply
Knockout
Thermostat
Connection
Knockout
Model AH206P/CP
Left Side
Right Side
Power
Supply
Knockout
Thermostat
Connection
Knockout
7. Connect the following:
A. Connect ground wire to ground terminal marked “GND”
B. Connect black to black
C. Connect yellow to yellow, or white to white
Air Handler PCB
W2 W1 W G G
Connect
Push Connector
to “W” Wiring
on Thermostat
To
Thermostat
To Air
Handler
PCB
To Domestic Priority Switch
Connect to White and Black Wires (Normally Closed
Wiring Configuration) on Rinnai Domestic Priority Switch
IMPORTANT: If the Domestic Priority Switch is not used in
the installation, remove the wiring harness from the PCB. The
thermostat “W” wire should be directly wired to the PC Board.
Connect Spade
Connector to
“W” Terminal on
Air Handler PCB
Push Connector
to Thermostat
Connections to the Air Handler PC Board
Push-in Wire
Connector Assembly