Honeywell ST9141A1002 Manuale Utente

1

69-0780

LIGHT-EMITTING DIODE (LED) INDICATIONS:

LED flashing dim-bright indicates normal operation.
LED off when control is powered indicates defective

control.

LED on continuously when control is powered indicates

defective control.

LED flashing in a cycle with LED on  followed by one

or more off pulses indicates the following system
errors.

1

Burner limit circuit is open.

2

Primary limit circuit is open.

3

Pressure switch circuit is improp-
erly closed.

4

Control is in lockout due to air
not circulating (overheating).

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazardous condi-
tion.

2. Check the ratings and specifications given in the

instructions and on the product to ensure the product is
suitable for your application.

3. Installer must be a trained, experienced service

 technician.

4. After installation is complete, check out the product

operation as provided in these instructions.

Disconnect power supply before wiring to pre-
vent electrical shock or equipment damage.

The ST9141A1002 is mounted in the appliance wiring

compartment using four No. 6 screws (obtained locally)
through holes on the corners of the enclosure.

All wiring must comply with local codes and ordi-

nances. Disconnect power before making wiring connec-
tions. Refer to Fig. 1 for standard wiring connections. Refer
to Fig. 2 for an internal schematic.

The ST9141A1002 Electronic Fan Timer integrates con-

trol 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 ST9141A1002 are to
monitor the thermostat for heat, cool, and fan demands and
run the induced draft blower motor and up to a two-speed
circulating fan as required. The ST9141A1002 monitors an
spdt pressure switch, burner limit and primary limit. A
Honeywell SV9500 Hot Surface Pilot Ignition System
Control manages the burner, which is energized through
the pressure switch. A light-emitting diode (LED) indicates
system status.

In addition, this model includes electronic air cleaner

and humidifier convenience terminal connections.

NOTE: Use this control to replace an identical ST9141A1002

Electronic Fan Timer only. This control is not for use in
general applications.

ELECTRICAL RATINGS:

Power Requirements:

Voltage: 18-30 Vac, 60 Hz.

Contact Ratings:

Combustion Blower:

1.5A Full Load, 10A Locked Rotor at 115 Vac.
.75A Full Load, 5A Locked Rotor at 230 Vac.
Reduce full load rating by humidifier load.

Circulating Fan (Heat-Cool Speed):

15A Full Load, 30A Locked Rotor at 115 Vac.
7.5A Full Load, 15A Locked Rotor at 230 Vac.
Reduce full load rating by electronic air cleaner

load.

Thermostat Load: 0.06A plus ignition system current

draw.

ON/OFF DELAY SETTINGS:

Heat Speed:

Delay On: 30 seconds, fixed.
Delay Off: 60, 100, 140 or 180 seconds, field

adjustable.

Cool Speed:

Delay On: 6 seconds, fixed.
Delay Off: 60 seconds, fixed.

Timing Tolerance: Larger of 

±

5% or 

±

2 seconds.

POSTPURGE TIMING: 5 seconds.
ENVIRONMENTAL RATINGS

Temperature: -40

°

 to +175

°

 F [-40

°

 to +79

°

 C].

Humidity: 5 to 95%, noncondensing.

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