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Environmental & Combustion Controls
ST9120U1011
Universal Electronic Fan Timer with adjustable heat fan on, heat fan off, cool fan on, and cool fan off

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Overview
The ST9120U Universal Electronic Fan Timers integrate control of all combustion blower and circulating fan operations in a gas warm air appliance. This control is the central wiring point for most of the electrical components in the furnace. The basic purposes of the ST9120U are to monitor the thermostat for heat, cool and fan demands, run the induced draft blower motor and run a circulating fan (up to two speeds) as required. The ST9120U also monitors limit switch strings and energizes separate ignition control systems through pressure switches. The ST9120U can replace any ST9101, ST9120, ST9141 or ST9160 listed in Table 3 below. The ST9120U features a field-adjustable heat fan-on delay, a field-adjustable heat fan-off delay, a field adjustable cool fan-on delay and a field-adjustable cool fan-off delay. Electronic air cleaner (EAC) and humidifier (HUM) convenience terminal connections and continuous low speed indoor air circulation are provided.

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Product Prices
Package Type Product Base Price($) Order Quantity
U
1 + $207.30

Product Specifications  Back To Top
Description Universal Electronic Fan Timer with adjustable heat fan on, heat fan off, cool fan on, and cool fan off
Application Integrates control of combustion blower and circulating fan operations for a gas warm air appliance
Electrical Ratings 18 to 30 Vac
Frequency 60 Hz
Frequency 50 Hz
Heat Fan On Delay adj. 30, 60 sec (set at 30 sec)
Heat Fan Off Delay adj. 60, 120, 150, 180 sec (set at 120 sec)
Cool Fan On Delay adj. 4, 30 sec (set at 4 sec)
Cool Fan Off Delay adj. 30, 60 sec (set at 30 sec)
Temperature Range, Ambient (F) -40 F to +175 F
Temperature Range, Ambient (C) -40 C to +79 C
Approvals, Underwriters Laboratories Inc Listed: Report MP466
Approvals, Canadian Standards Association Certified: File No. LR95329-17
Replaces all ST9101's, all ST9120's, all ST9141's, and all ST9160's
Tradeline Value Universal Tradeline

Literature and other Resources Download Back To Top
Installation Instructions - (ST9120U Universal Electronic Fan Timers)
Installation Instructions - (ST9120U Universal Electronic Fan Timers)
Sell Sheet - (ST9120U ST9120U Universal Electronic Fan Timer)
Universal Electronic Fan Timer Main(Photo_BW - Web Quality Image)
Universal Electronic Fan Timer Main(Photo_BW - Print Quality Image)
Electronic Fan Timer Single Circuit board 3 inch Cover Off(Photo_BW - Web Quality Image)
Electronic Fan Timer Single Circuit board 3 inch Cover Off(Photo_BW - Print Quality Image)
Electronic Fan Timer Single Circuit board 6 inch Cover Off(Photo_BW - Web Quality Image)
Electronic Fan Timer Single Circuit board 6 inch Cover Off(Photo_BW - Print Quality Image)
Electronic Fan Timer Single Circuit board 3 inch Cover Off(Photo_Color - Web Quality Image)
Electronic Fan Timer Single Circuit board 3 inch Cover Off(Photo_Color - Print Quality Image)
Electronic Fan Timer Single Circuit board 6 inch Cover Off(Photo_Color - Web Quality Image)
Electronic Fan Timer Single Circuit board 6 inch Cover Off(Photo_Color - Print Quality Image)
Universal Electronic Fan Timer Front(Photo_BW - Web Quality Image)
Universal Electronic Fan Timer Front(Photo_BW - Print Quality Image)
Universal Electronic Fan Timer Front(Photo_Color - Web Quality Image)
Universal Electronic Fan Timer Front(Photo_Color - Print Quality Image)
Universal Electronic Fan Timer Front(Photo_Color - Web Quality Image)
Universal Electronic Fan Timer Front(Photo_Color - Print Quality Image)
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