Furnace Blower Operation / Air Conditioner Relay Interlock - GeneralAire 5500 Manuel D'installation Et D'utilisation

3.16 FURNACE BLOWER OPERATION / AIR
CONDITIONER RELAY INTERLOCK
Auxiliary DPDT safety relay: Use this method in the following
situations:
1. To prevent the air conditioner from running when there
is a call for humidity. The DPDT relay will open the "Y"
circuit and close the "G" circuit for operation while a call
for humidity is present (See Fig. 3.w.). The demand for
humidity will override the call for cooling.
2. In systems using a thermostat where G and Y are a single
circuit, the DPDT relay will allow blower operation to occur
without back-feeding the compressor. DO NOT use this
method when simultaneous humidification and cooling
will be desired. Use a high limit humidistat in to avoid
condensation in ductwork. The humidistat should be set
to OFF during the air conditioning season if humidification
is not desired.
3. For homes without an air conditioner. (See Fig. 3.v).
4. For variable speed or DC systems, consult the furnace
manufacturer.
STEAM 5500
N2
G ND
N1
AB
AB
G ND
IN
NO
C
NC
C
NO
GND
24V
Fig. 3.v
FURNACE CONTROL
CIRCUIT BOARD
R W C G Y
NC NO
SPDT RELAY
(FIELD SUPPLIED)
R W G Y
HUMIDISTAT
15
STEAM 5500
N2
G ND
N1
AB
AB
G ND
IN
NO
C
NC
C
NO
GND
24V
NOTE:
External transformer necessary because onboard
transformer is not su cient to power auxiliary relay.
ENG
TO AIR
FURNACE CONTROL
CONDITIONING
CIRCUIT BOARD CONTACTOR
R W C G Y
NC1 NO1 NC2 NO2
C1 C1
DPDT RELAY
(FIELD SUPPLIED)
24V 120V
TRANSFORMER
24V, 10VA
(FIELD SUPPLIED)
Form No. 5500-32 Rev C
Code: +0700092EN REV 3.2 04APR2022