Honeywell TrueSTEAM Guide D'installation page 17

Note: This image is not a complete wiring diagram. It only depicts power monitoring.
See "Wiring the TrueSTEAM" on page 19.
1
TrueSTEAM
HUM
HUM
1 2 3 4 5 6
On
Off
Note: This image is not a complete wiring diagram. It only depicts power monitoring.
See "Wiring the TrueSTEAM" on page 19.
Humidity Control
HUM
HUM
Off
TrueSTEAM Humidification System 69-2285EF—01
Thermostat with
Humidity Control
HVAC System
2 3
R
C
TrueSTEAM
HVAC System
R
C
1 2 3 4 5 6
On
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
15