Honeywell TrueSTEAM - Control and Indicator Components; Structural and Access Components

TrueSTEAM Humidification System
 9 69-2285EFS—03
WIRING–GETTING STARTED
System Fan Regulation is a configuration that allows TrueSTEAM to monitor the HVAC sys-
tem’sfanoperation,andensurethatthefanisonifhumidityisneeded.Airflowisneededtodis-
tributehumidityintothelivingspace,andpreventcondensationfromformingintheduct.
Therearetwowayssystemfanoperationcanbeconfigured,dependingonwhathumiditycon-
trol is used.
1. Using a thermostat with integrated humidity
control, such as VisionPRO IAQ or Prestige.
• Athermostatcontrolsthefanandhumidifier,so
the control will not allow steam production without
turning the system fan on.
• WirethermostatGtotheHVACsystemGasnormal.
Wire TrueSTEAM HUM terminals to the system HUM
terminals.
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.
2. Using a humidistat SEPARATE from the thermostat,
such as H8908 or TrueIAQ.
• Externalhumiditycontrolsdonotmonitororcontrolthe
systemfan,soitiscriticalthatTrueSTEAMensuresthe
fan has power before allowing humidity.
• BreakthethermostatGtoHVACsystemGconnection.
Wire thermostat G to TrueSTEAM GT. Wire TrueSTEAM
GF to HVAC system G.
Thermostat G calls will pass through TrueSTEAM
unhindered.Ifthissignalisnotpresent,andhumidityis
needed,TrueSTEAMwillrelaypowerfromitsRTterminal
to GF and out to HVAC system G to ensure the fan has power for humidity calls
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 GF until the water temperature reaches 170°F (just before boiling).
Note: This feature can be used with VisionPRO IAQ as well. See page 13.
M28686
G
HUM
HUM
HUM, G
SIGNAL
1
2
3
1
2
3
M28687
R
RT
GF G
G
GT
IF THERMOSTAT G SIGNAL IS NOT PRESENT, THEN THE
TrueSTEAM GF TERMINAL WILL ENERGIZE THE HVAC G
TERMINAL TO TURN ON FAN.
R
HUM
HUM
1
1
WIRING–GETTING STARTED
Note: This image is not a complete wiring diagram.
It only depicts fan regulation.
Note: This image is not a complete wiring diagram.
It only depicts fan regulation.