Honeywell HCM-631N - Quietcare 3 Gallon Owner's Manual page 31

IMPORTANT NOTE: This images below are not complete wiring diagram. 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.
TrueSTEAM
HUM
HUM
1 2 3 4 5 6
On
Off
Humidity Control
HUM
HUM
On
Off
TrueSTEAM Humidification System 69-2285—01
Thermostat with
Humidity Control
HVAC System
1 2 3
R
C
TrueSTEAM
HVAC System
R
C
1 2 3 4 5 6
WIRING BASICS: CONFIGURATION 1
When using a thermostat with integrated
humidity control (such as VisionPRO IAQ
or Prestige):
• The thermostat is powered by the
system transformer. In this configuration,
the thermostat must have power or
TrueSTEAM will not be able to
produce steam.
• Because the thermostat knows when the
system transformer has power, set DIP 4
to UP, so that it is not looking for an R input
from the system R.
M29615
WIRING BASICS: CONFIGURATION 2
When using a humidistat separate from the
thermostat (such as H8908 or TrueIAQ):
• TrueSTEAM generally supplies power
to the humidistat. In this configuration,
TrueSTEAM must monitor HVAC system
power to determine if humidity is allowed.
• Leave DIP 4 in the DOWN position (factory
setting), and wire the HVAC system R and
C to the TrueSTEAM R and C. TrueSTEAM
will verify power is present before allowing
steam production.
M29616
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