Resideo ST9120U1011/U Universal electronic fan timer replaces ST9120, ST9101, ST9141, and ST9160 models installed in gas warm air furnaces
Includes instructions and special wire harnesses for easy replacement.
The ST9120U1011 monitors the thermostat for heat, cool and fan demands, runs the induced draft blower motor and runs the circulating fan (up to two speeds) as needed. It also monitors limit switch strings and energizes ignition control. In short, this one little unit packs a big punch, making it a smart choice for your applications as well as your business.
Specifications
Description: Twinning capability, with 5 amp. Fuse
Application: Integrates control of combustion blower and circulating fan operations for a gas warm air appliance
Heat Fan On Delay: adj. set at 30 sec
Heat Fan Off Delayz: adj. set at 140 sec
Cool Fan On Delay: adj. 4-30 sec, (set at 4 sec)
Cool Fan Off Delay: fixed 30 sec
Temperature Range, Ambient (F): -40 F to +175 F
Temperature Range, Ambient (C): -40 C to +79 C
Documents
FAQ
What does the ST9120U control?
It integrates control of all combustion blower and circulating fan operations in a gas warm air appliance: it monitors the thermostat for heat, cool and fan demands, runs the induced draft blower and runs the circulating fan at up to two speeds.
What power does it need?
18 to 30 VAC, 60 Hz.
Which delays can be adjusted?
The heat fan-on delay, heat fan-off delay and cool fan-on delay are field adjustable; the cool fan-off delay is fixed.
Does it have accessory terminals?
Yes. Electronic air cleaner (EAC) and humidifier (HUM) convenience terminals are provided, along with continuous low speed indoor air circulation.
