WIRING
TrueSTEAM wiring is different from evaporative pad humidifier wiring. In addition to solenoid water valve actuation,
TrueSTEAM can monitor system power and regulate system fan operation.
You need to decide on the configurations you will use before wiring the TrueSTEAM, These decisions will affect
how the connections are made, how the DIP switches are set, and how TrueSTEAM operates for the homeowner.
STEP ONE:
Make Power Monitoring Decision
Power Monitoring is a configuration that allows TrueSTEAM to humidify only when it has confirmation that the
HVAC system transformer has power. This helps prevent steam from entering the supply duct when the HVAC
system is not operating. There are two ways to configure power monitoring, depending on the humidity
control used:
•
CONFIGURATION 1
– Using a thermostat with integrated humidity control
•
CONFIGURATION 2
– Using a humidistat separate from the thermostat
Before making decisions about wiring configurations:
I understand when to use the DIP switches and how to set them for the humidity control.
CONFIGURATION 1 — using a thermostat
with an integrated humidity control such as
VisionPRO IAQ or Prestige — is ideal for
contractors who:
Want simplified wiring – TrueSTEAM only
needs to be connected to the HUM terminals
from the control.
Provide integrated system and accessory
control in the living space.
Are using VisionPRO IAQ or
Prestige thermostat.
Proceed to “Wiring Basics: Configuration 1”
illustration at top of next page.
CONFIGURATION 2 — using a humidistat
separate from the thermostat such as H8908
or TrueIAQ — is ideal for contractors who:
Use a humidity control separate from
the thermostat.
Wish to locate the humidity control on the
return duct.
Proceed to “Wiring Basics: Configuration 2”
illustration at bottom of next page.
Deciding on the Wiring Configuration
TrueSTEAM Humidification System 69-2285—01
28
