Install Instructions

APPENDICES
HVAC
ELECTRONIC
HUMIDISTAT
THERMOSTAT
HUM
HUM
24V
24V
GYWRRc
GYWRC
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
RECOMMENDED
AIR FLOW SWITCH (AFS)
1
M24757A
HVAC
POWER
MASTER
Tr ueSTEAM - INTERNAL
Follow the diagram for control options 1 through 14 to wire the TrueSTEAM. Refer to the installation manual
provided with the control for additional instructions if needed.
OPTION 1: Dry-contact Mechanical
Humidistat Wiring
1
Make sure that the thermostat used
isolates Y from G. All Honeywell Prestige,
VisionPRO IAQ, VisionPRO, and Focus Pro
thermostats do this.
OPTION 2: TrueIAQ Wiring
1
• Make sure that the thermostat used
isolates Y from G. All Honeywell Prestige,
VisionPRO IAQ, VisionPRO, and Focus
Pro thermostats do this.
• For the TrueIAQ Installer Setup, set ISU
#25 to 3.
HVAC
RECOMMENDED
AIR FLOW SWITCH (AFS)
HumidiPRO
THERMOSTAT
C
R
U
U
S
S
GYWRRc
GYWR C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
M34831
Tr ueSTEAM
Setting
Light
Auto
Next Auto
System
%
Inside
%
HUMIDITY BOOST
OUTDOOR
SENSOR
(OPTIONAL)
1
CAUTION: Voltage Hazard.
Before wiring to HVAC terminals, disconnect HVAC equipment power. Make sure TrueSTEAM
is not plugged in.
6
543
2
On
Off
1
AFS Monitor Recommended
M32913
TrueSTEAM Humidication System 69-2285—05
56
B: Advanced TrueSTEAM Wiring