Honeywell Steam Humidifier Professional Installation Manual page 67

B: Advanced Steam Humidifier Wiring
OPTION 14: Steam Humidifier wired to equipment with powered terminals with Steam Humidifier
controlling the fan
HUM W2 Y1 DHUM
NOTES:
1 YOU MUST ADD A 24VAC ISOLATION RELAY BETWEEN THE STEAM HUMIDIFIER AND THE AIR
HANDLER. AN R8222B1067 COULD BE USED.
THE 50027910-001 AIR-FLOW SWITCH (AFS) IS RECOMMENDED TO ENSURE THERE IS
2
AIR-FLOW WHEN THE HUMIDIFIER IS RUNNING. IF THE AFS IS NOT USED, THE 4
DIPSWITCH MUST BE SET TO THE ON POSITION AT THE HUMIDIFIER (UP).
INFINITY/EVOLUTION CONFIGURATION
3
1. IN SETUP UNDER THE INSTALL/SERVICE MENU:
A. SELECT ACCESSORIES AND CHOOSE YES FOR HUMIDIFIER AND SET THE OPTION
HUMIDIFY WITH FAN TO YES.
B. SELECT FURNACE SETUP. UNDER THE G TERMINAL SET UP, SELECT THE FAN
OPTION AND SET THE FAN SPEED TO LOW.
A 24VAC ISOLATION RELAY MUST BE USED BETWEEN THE FURNACE AND THE HUMIDIFIER TO
ISOLATE THE TWO TRANSFORMERS. EQUIPMENT DAMAGE WILL OCCUR IF NOT USED.
THE HUMIDIFY WITH FAN OPTION MUST BE SELECTED. THIS WILL ALLOW THE SYSTEM TO CALL
FOR HUMIDIFICATION WITHOUT A HEAT CALL.
THE G TERMINAL MUST BE SET TO FAN. THIS WILL ALLOW THE HUMIDIFIER TO CONTINUE TO RUN
THE FAN AFTER THE HUMIDIFICATION CALL IS SATISFIED. THE STEAM HUMIDIFIER REQUIRES THE
FAN TO CONTINUE TO RUN UNTIL THE WATER TEMPERATURE IN THE RESERVOIR IS COOLED TO
170 DEG TO PREVENT STEAM FROM CONDENSING IN THE DUCTWORK.
THE INFINITY SYSTEM WILL RUN ITS FAN AT LOW SPEED WHEN IT HAS A CALL FOR
HUMIDIFICATION WITHOUT A HEATING CALL. THIS AIRFLOW IS 50% OF HEATING OR COOLING
AIRFLOW (WHICHEVER IS GREATER). MAKE SURE AIRFLOW SATISFIES ANY MINIMUM
REQUIREMENT FOR YOUR STEAM HUMIDIFIER.
FURNACE SET UP IS SHOWN. FAN COIL SET UP WILL BE SIMILAR.
Steam Humidifier System 69-2285—09
1
1
3
AIR-FLOW
SWITCH
2
G COM W/W1 Y/Y2
FURNACE TERMINALS
24 V
24 V
HUM
HUM
C
GT
R
RT
GF
EXT
3
STEAM HUMIDIFIER
R
1 2 3 4
On
Off
AFS Monitor Recommended
5
6
M33044A
65