2. AUX1 and AUX2 for 2-Speed Fan Relay Kit
a. Use to control fan speed operation, high speed for cooling,
heat pump, and fan-only modes. Low speed is used for
electric heat. Fig. 9 shows proper connection for 24-v dc
2-speed fan relay kit. Note that kit’s relay coil is in parallel
with fan relay coil on PCB connected to AUX1 and AUX2.
Make sure the normally closed contact is connected to the
lower speed.
b. The latent capacity control kit is used to control fan speed
operation when the relative humidity is above a set point on
humidistat. Humidistat opens and 2-speed fan relay re-
mains in normally closed position with fan motor running
at a lower speed for maximum humidity control. Fig. 10
shows proper connection for latent capacity control kit.
Note that it is connected in the same manner as 2-speed fan
relay kit but with relay connected to humidistat (orange
wires).
c. Time delay-off relay kit is used to increase the efficiency of
the system by delaying the fan from turning off after the
thermostat is satisfied on the HK61GA001 board. The
Fig. 6—HK61GA001 Printed-Circuit Board
A97025
2FC-1
AUX1
AUX2
DUMMY
DUMMY
DUMMY
COMMON
COMMON
240 VAC
240 VAC
TRANSFORMER
AC LINE
FAN
RELAY
24VDC
FAN
EAC2
L2
T3
T2
T1
EAC1
L1
F4
F3
F2
F1
1
2
3
4
5
6
7
8
9
10
11
12
C
HK61GA001A
W2-3
W2-E
5 AMP
FUSE
MAX
F
AN
TDB
LOW VOLTAGE
TERMINAL BOARD
2ND STAGE
3RD STAGE
NOT USED
FUSE
(LOW VOLTAGE)
CONNECTIONS
FOR VARIOUS
ACCESSORIES
FAN CONNECTIONS
ELECTRONIC AIR
CLEANER CONNECTIONS
ELECTRIC HEAT
BREAKOFF TABS
FOR STAGING
HK61GA001
PLUG
INTERLOCK
DIODES
TRANSFORMER
CONNECTIONS
10
