Rinnai CAH Series Instalation And Operating Manual page 25

LOW VOLTAGE/BASSE TENSION
R W1 Y2
V/W2
Wire leads removed for clarity.
A single stage or two stage thermostat must be installed with the
air handler.
Thermostat Field Connections (use depends on the applica-
tion)
•
Dh—Used for dehumidification contact.
•
R—signal is 24V hot to thermostat.
•
W1—signal controls first stage heat from the thermostat. If a
single stage thermostat is used, connect W to W2.
•
W2—signal from a two-stage thermostat.
•
Y1—Connection for the low speed compressor operation.
•
Y/Y2—Connection for the Y signal or high speed (Y2) signal
from the thermostat.
•
G—Connection for the G (fan) signal is energized from the
thermostat.
•
O—Not used with this model air handler.
•
C—Connection for the C terminal to the thermostat (24V
common).
•
1 and 2—not used for this product.
Canadian Air Handler Installation and Operation Manual
Y1 G C DH O
24V Thermostat Terminals
1 2
P = Pump Line Wire Terminal
N = Pump Neutral Terminal
N = Air Handler Neutral Terminal
L1 = Air Handler Line Wire Terminal
120V Pump Supply
120V Power Supply
Power and external pump
power terminals.
25