Honeywell TrueSTEAM HM506 Installation Manual page 19

l Note: This image is not a complete wiring diagram. It onJy depicts fan regulation. See[
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'W@?_gthe TrueSTEAM" on page 19.
1
TrueSTEAM
HUM
HUM
f Thermostat with
Humidity Control
R
C
HVAC System
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.
Note: This image is not a complete wiring diagram. It onJy depicts fan regulation. See|
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'W@?_gthe TrueSTEAM" on page 19.
l
G
WIRING BASICS: CONFIGURATION 2
When using a humidistat separate from the
thermostat (such as Hsg08 or TrueiAQ):
TrueSTEAM
Humidity Control
H U M
GT
R
GF G
HVAC System
The external humidity control does
not monitor or control the system fan.
TrueSTEAM must confirm 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.
TrueSTEAM Humidification System 69-2285EF--01
17