Honeywell TrueSTEAM HM506 Installation Manual page 17

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Note: This image is not a complete wiring diagram. It only depicts power monitoring.
See 'Wiring the TrueSTEAM" on page 19.
TrueSTEAM
HUM
HUM
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):
• 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.
l
Note: This image is not a cornpbte wiring diagram. It only depicts power monitoring.
See 'Wiring the TrueSTEAM" on page 19.
WIRING BASICS: CONFIGURATION 2
When using a humidistat separate from the
thermostat (such as H8908 or TruelAQ):
Humidity Control
TrueSTEAM HVAC System
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.
TrueSTEAM Humidification System 69-2285EF--01
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