ICP F9MAE - Page 32

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Specifications subject to change without notice.
Figure 39 Isolation Relay for Humidifiers with Internal Power Supply
24 V
Coil
To Humidifier Leads
To Com/24V Screw Terminal
on Thermostat Strip
To HUM Terminal On
Furnace Control Board
To Humidifier Leads
A11157
Figure 40 Variable Speed Furnace Control − Switch Locations
OAT
PL9
PL4
PL7
SW*
1
SW2 SW3
SW4
O
N
W2
Y1
DHUM
8 7 6 5 4 3 2 1
3 2 1
O
N
O
N
O
N
3 2 1
3 2 1
L11F080