Rinnai CAH Series Instalation And Operating Manual page 26

Single Stage Hot Water Heat Only Application
Air Handler
R
V/W2
W1
Y2
Y1
G
C
DH
O
1
2
NOTE
Connect common (C) wire only if required. See thermostat installation instructions for more information.
26
Thermostat
R
V/W2
G
C
Two Stage Hot Water Heat Only Application
Air Handler
R
V/W2
W1
Y2
Y1
G
C
DH
O
1
2
Canadian Air Handler Installation and Operation
Thermostat
R
V/W2
W1
G
C