Manual

TrueSTEAM Humidification System
  69-2036EFS—07
WIRIng
HVAC
RECOMMENDED
AIR FLOW SWITCH (AFS)
MECHANICAL
HUMIDISTAT
HVAC
POWER
MASTER
THERMOSTAT
HUM
HUM
GYWR Rc
GYW
R
C
TrueSTEAM - INTERNAL
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
M24756
12
Wire the TrueSTEAM according to the diagram that applies to your humid-
ity control.
Follow this diagram if using a mechanical humidistat
such as H8908ASPST or other.
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
VISIONPRO IAQ
D-1
R-2
C-3
M24758
RECOMMENDED AIR FLOW SWITCH (AFS)
TrueSTEAM - INTERNAL
Follow this diagram if using VisionPRO IAQ
TM
for independent fan control. TrueSTEAM will
independently activate furnace fan (humidity on demand).
A
Set VisionPRO IAQ
TM
ISU
parameter 374 to 3.
A
HVAC
TrueIAQ
THERMOSTAT
HUM
HUM
R
C
GYWR Rc
GYWR C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
RECOMMENDED
AIR FLOW
SWITCH (AFS)
M27409
HVAC
POWER
MASTER
TrueSTEAM - INTERNAL
Follow this diagram to wire TrueIAQ for manual
operation.
Factory
installed
jumper
Factory
installed
jumper
If AFS is used, ensure DIP 5
is in ON position.
If AFS is used, ensure DIP 5 is in ON position.
If operating TrueSTEAM without
monitoring HVAC power or
AFS, C wiring hookup is
optional, but ensure DIP 4 is in
ON position.
B
B
If AFS is used, ensure DIP 5
is in ON position.
WIRIng
A
Set TrueIAQ ISU parameter 10 to 1, and ISU 25 to 2.
A
For auto-operation: also wire W and G to thermostat
W and G.
B
B