Step Two: Make System Fan Regulation Decision - Honeywell HM512W1005 Installation Manual

STEP TWO: Make System Fan Regulation Decision
System Fan Regulation is a configuration that requires TrueSTEAM to monitor the HVAC system fan and make
sure the fan is on if humidity is needed. This helps ensure that airflow will distribute humidity into the living space,
and prevents water condensation in the duct. There are two ways to configure system fan regulation, depending
on the humidity control used:
• CONFIGURATION 1
• CONFIGURATION 2
Which is right for you?
CONFIGURATION 1 — using a thermostat
with an integrated humidity control such as
VisionPRO IAQ or Prestige — is ideal for
contractors who:
Want integrated control of the humidifier and
HVAC system in the living space.
Want the system fan to turn on immediately
upon a call for humidity.
Proceed to "Wiring Basics: Configuration 1"
illustration at top of next page.
16
– Using a thermostat with integrated humidity control
– Using a humidistat separate from the thermostat
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 avoid excessive air circulation in
the home. TrueSTEAM fan calls will not be
sent out of the TrueSTEAM GF terminal until
the water temperature reaches 176°F (just
before boiling).
Note: This feature can be used with VisionPRO IAQ as well.
See page 21.
Proceed to "Wiring Basics: Configuration 2"
illustration at bottom of next page.
TrueSTEAM Humidification System 69-2285EF—01