Honeywell ST9141A1002 manual

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Table of contents for the manual

  • Page 1

    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. Numb[...]

  • Page 2

    2 Fig. 1—Typical ST9141A1002 wiring connections. UNUSED M5607 G W C Y R FUSE AIR CLEANER LO ML MH HI CIRCULATING FAN STARTING CAP BURNER LIMIT PRIMARY LIMIT PRESSURE SWITCH TRANSFORMER 120 VAC 24 VAC = DENOTES STANDARD TERMINAL. = DENOTES TERMINAL NOT PROVIDED. THERMOSTAT L2 (N) L1 (H) TO 120 VAC POWER SUPPLY COOLING CONTACTOR Y GR W CY 1 2 UP SP[...]

  • Page 3

    3 69-0780 K2 COOL ST9141A ELECTRONIC FAN TIMER R W Y G C THERMOSTAT C N2 CIRCULATING FAN NOTE: DOTTED LINES REPRESENT PRINTED CIRCUIT BOARD WIRING. M5608 ELECTRONIC AIR CLEANER TO 120 VAC POWER SUPPLY COMBUSTION AIR BLOWER MED-LOW HIGH LOW FUSE INTERLOCK N1 K2 HEAT K1 MED-HIGH X SV9500 HOT SURFACE PILOT IGNITION SYSTEM CONTROL GND 24V EAC (S) EAC ([...]

  • Page 4

    4 S T9141A1002 Operating Sequence Action System Response Thermostat calls for heat. • Pressure switch confirmed in no airflow position. (If pressure switch shows (W terminal is energized.) airflow, LED flashes three times.) • Combustion air blower is energized. • Air proving switch makes (air flow is established). • Ignition system is energ[...]

  • Page 5

    5 69-0780 Action System Response Primary limit switch string closes. • Circulating fan turns off after the selected heat fan off delay timing. • LED stops flashing. • Normal operation resumes. Primary limit switch string is open • Combustion air blower, circulating fan and ignition system are de-energized. for more than 150 seconds (on each[...]

  • Page 6

    6 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 Printed in U.S.A. QUALITY IS KEY[...]