Operation Manual

INSTALLING CONTROL WIRES FOR HUMIDIFIER CONTROL (THM303A ONLY)
l If control of the humidifier is desired, the 2 wires connecting the original humidistat needs to be connected
to the 2 terminals marked 'H1' and 'H2'.
l The original humidistat should be removed or set to 'OFF' position.
Noted: The 2 humidifier control terminals 'H1' and 'H2' are electrically isolated from the Heat / Cool terminals.
15
RH
O
W
Y
H1
H2
G
RC
B
Humidifier
M
Humidistat should be off or Disconnected