Manual

Installation Guide
69-2036EFS—07 6
WIRIng
FAN
FURNACE BOARD
EQUIPMENT INTERFACE MODULE (EIM)
G
C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
CONV. HP
1
2
3
C
R
RC
RH
W1
W2
W3
Y
Y2
G
O/B
AUX
AUX2
Y
Y2
G
H1
U
M2
D1
H
M2
V1
N
T2
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
FAN RELAY
HVAC
POWER
MASTER
VISIONPRO IAQ
D-1
R-2
C-3
M24761
RECOMMENDED
AIR FLOW SWITCH
(AFS)
TrueSTEAM - INTERNAL
Follow this diagram for a system with the VisionPRO IAQ
TM
with operation dependent on HVAC power
(humidification and fan call by thermostat).
Set VisionPRO IAQ
TM
ISU
parameter 374 to 1. This
allows the thermostat to call
for fan at the same time as it
calls for humidification.
If AFS is not used, set DIP 4
ON and wire HUM terminals
only.
If AFS is used, set DIP 5 ON
and DIP 4 OFF and wire R, C,
and Hum terminals.
B
B
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
HUMIDISTAT
HUM
HUM
HAC
HAC
MECHANICAL
HUMIDISTAT
HUM
HUM
HAC
HAC
RECOMMENDED
AIR FLOW SWITCH
(AFS)
TrueSTEAM - INTERNAL
HVAC
120 VAC
R8222
RED
BLACK
L1
L2
120
VAC
AT120
R C
M24760
HVAC POWER MASTER
Follow this diagram if using a blower fan dedicated to the TrueSTEAM (a fan separate from the HVAC
equipment, as in hydronic or cooling-only applications).
Remove Factory installed
jumper (R/RT)
If AFS is used, ensure DIP 5
is in ON position.