87
H
U
MI
D
I
FI
C
A
TI
ON
/
D
E
H
U
MI
D
I
FI
C
ATI
ON
C2. WITH NON-COMMUNICATING THERMO-
STAT (REQUIRES OPTIONAL HUMIDISTAT)
For non-communicating thermostats, an op-
tional humidistat must be installed. Controlled
humidification and dehumidification can be ac-
complished using a humidistat as shown in
Figures 47 or 48. These figures show installa-
tion of a humidifier with external and internal
power supplies respectively. Dehumidification
operation will be disabled if the dipswitch S2-8
is in the “OFF” position. If this switch is in the
“ON” position, dehumidification control will be
active.
INTE
GRATE
D FURNACE
CONTROL
Communicating Furnace
FIGURE 46
WIRING FOR OPTIONAL HUMIDIFICATION (AND DE-HUMIDIFICATION WITH COMMUNICATING THERMOSTAT) WITH OPTIONAL HU-
MIDIFIER AND NO HUMIDISTAT (HUMIDIFICATION ACTIVE DURING ANY HEAT CALL) (FOR USE WITH COMMUNICATING OR NON-
COMMUNICATING THERMOSTATS)
ST-A1194-55-00
FIGURE 47
WIRING FOR OPTIONAL DE-HUMIDIFICATION AND HUMIDIFICATION (WITH OPTIONAL HUMIDISTAT AND HUMIDIFIER).
NOTE: CAN BE USED WITH COMMUNICATING OR NON-COMMUNICATING SYSTEMS.
ST-A1194-56-00
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