Honeywell Steam Humidifier - Fan Control Wiring; Humidifier Controlling Fan Wiring

APPENDICES
OPTION 12: VisionPRO IAQ controlling 2 Steam Humidiers
6
543
2
On
Off
1
AFS Monitor Recommended
M32914
A
AFS
STEAM HUMIDIFIER 1
FURNACE
M33057
COMMUNICATION LED
COMMUNICATION
TERMINALS
24 VAC
TH9421C1004
THM5421C1008
THE YTH9421C1002 KIT INCLUDES THE TH9421C1004 VISION-PRO IAQ THERMOSTAT AND
THE THM5421C1008 EQUIPMENT INTERFACE MODULE. THE TH8320R1003 KIT INCLUDES
THE TH942C1004 VISION-PRO IAQ THERMOSTAT, THM5421C1008 EQUIPMENT INTERFACE
MODULE, AND C7089U1006 OUTDOOR SENSOR.
A DOUBLE-POLE RELAY SUCH AS THE R8228D1018 IS REQUIRED.
AN AIR-FLOW SWITCH IS RECOMMENDED. IF AN AIR FLOW SWITCH IS NOT USED THERE
DOES NOT NEED TO BE A WIRE ATTACHED TO C ON THE STEAM HUMIDIFIER AND THE #4
DIP SWITCH NEEDS TO BE SET TO “ON”.
GT IS NOT REQUIRED FOR THIS APPLICATION. SINCE THE VISIONPRO IAQ THERMOSTAT
DOES NOT HAVE A Y/G INTERCONNECT, PARALLEL WIRING CAN BE DONE (AS SHOWN).
HM609 OR HM612 STEAM HUMIDIFIER CAN BE USED.
CONFIGURE THE THERMOSTAT TO HUMIDIFY INDEPENDENT OF FAN (INSTALLER SETUP
374 SET TO 3).
1
2
3
4
5
6
STEAM HUMIDIFIER 2
1 6
3
2
1
4
4
5
CONV
HP
Steam Humidier System 69-2285—09
63
B: Advanced Steam Humidier Wiring