Honeywell HM509VPIAQ - TrueSTEAM 9 GPD Humidifier PRO IAQ Owner's Manual page 17

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

TrueSTEAM Humidification System
TrueIAQ
B
HUM
HUM
Y
G
R
C
24V
RECOMMENDED
24V
AIR FLOW
HUM
SWITCH (AFS)
HUM
C
GT
R
RT
GF
EXT
Y
G
Factory
TrueSTEAM - INTERNAL
installed
jumper
EQUIPMENT INTERFACE MODULE (EIM)
1
CONV. HP
2
W1
O/B
3
W2
AUX
C
W3
AUX2
R
Y
Y
RC
Y2
Y2
RH
G
G
H1
U
M2
D1
H
M2
V1
N
T2
69-2036EFS—07
WIRIng
A
HVAC
POWER
MASTER
M27409
FAN
FURNACE BOARD
C
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
G
FAN RELAY
M24758

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