Install Instructions

WIRING
IMPORTANT NOTE: The images below are not complete wiring diagrams. It only depicts power monitoring and is not
meant to be a stand alone diagram. Please refer to the “Wiring the TrueSTEAM” section in the following pages for complete
wiring diagrams.
WIRING BASICS: CONFIGURATION 1
When using a thermostat with integrated
humidity control (such as VisionPRO IAQ
or Prestige):
• A thermostat controls the fan and
TrueSTEAM. The control will not allow
steam production unless the system fan
is on.
• Wire Thermostat G to the HVAC system G
as normal.
• Wire TrueSTEAM HUM terminals to the
system HUM terminals.
WIRING BASICS: CONFIGURATION 2
When using a humidistat separate from the
thermostat (such as H6062 or TrueIAQ):
• The external humidity control does
not monitor or control the system fan.
TrueSTEAM must conrm that the fan has
power before allowing humidity.
• Break the thermostat G to HVAC system
G connection. Wire thermostat G to
TrueSTEAM GT. Wire TrueSTEAM GF to
HVAC system G.
• Thermostat G calls will pass directly
through TrueSTEAM. If this signal is
not present, and humidity is needed,
TrueSTEAM will relay power from its RT
terminal to GF and out to HVAC system
G to ensure the fan has power for
humidity calls.
Thermostat with
Humidity Control
HVAC System
TrueSTEAM
1
HUM
HUM
2 3
R
C
M29617
Humidity Control
Thermostat
Tr ueSTEAM
HVAC System
HUM
HUM
R
G
GT
GGF
M29618A
TrueSTEAM Humidication System 69-2285—05
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