Honeywell Steam Humidifier Professional Installation Manual page 58

B: Advanced Steam Humidifier Wiring
OPTION 3: VisionPRO IAQ Wiring with Fan Delay
• Follow this diagram if you are using VisionPRO IAQ with Steam Humidifier's fan-delay feature.
• The system fan will turn on when the water temperature reaches 176°F (80°C).
• Set installer setup #0374 to 3.
TH9421C
STEAM HUMIDIFIER
AFS
OPTION 4: VisionPRO IAQ without Fan Delay
• Follow this diagram if using VisionPRO IAQ to turn system fan on immediately with humidity call.
• Set installer setup #0374 to 1.
TH9421C
STEAM
HUMIDIFIER
56
COMMUNICATION
LED
THM5421C
COMMUNICATION
LED
THM5421C
FURNACE
1
On
Off
C7089U
M33052A
FURNACE
1
On
Off
C7089U
AFS Monitor Recommended
M33053
Steam Humidifier System 69-2285—09
2
3 4 5 6
AFS Monitor Recommended
M32914A
2
3 4 5
6
M32915