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White Rodgers 50A55-843 User Manual

White rodgers furnace user manual.
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50A55-843
Universal Integrated Furnace Control
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
The 50A55-843 is an automatic gas interrupted ignition control
These controls incorporate system fault analysis for quick gas
that employs a microprocessor to continually monitor, analyze,
flow shut-off, coupled with automatic ignition retry upon sensing
and control the proper operation of the gas burner, inducer, and
a fault correction.
fan.
Signals interpreted during continual surveillance of the thermo-
stat and flame sensing element initiate automatic ignition of the
burner, sensing of the flame, and system shut-off during normal
operation.
PRECAUTIONS
Installation should be done by a qualified heating and air
WARNING
conditioning contractor or licensed electrician.
If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air condi-
tioning contractor or licensed electrician.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and
Failure to comply with the following
ordinances.
warnings could result in personal injury
This control is a precision instrument, and should be handled
or property damage.
carefully. Rough handling or distorting components could cause
the control to malfunction.
FIRE HAZARD
Following installation or replacement, follow manufacturer's
• Do not exceed the specified voltage.
recommended installation/service instructions to ensure proper
• Protect the control from direct contact with water
operation.
(dripping, spraying, rain, etc.).
• If the control has been in direct contact with water,
replace the control.
CAUTION
• Label all wires before disconnection when servic-
ing controls. Wiring errors can cause improper
and dangerous operation.
Do not short out terminals on gas valve or primary
• Route and secure wiring away from flame.
control. Short or incorrect wiring may damage the
SHOCK HAZARD
thermostat.
• Disconnect electric power before servicing .
• Ensure proper earth grounding of appliance.
• Ensure proper connection of line neutral and line
hot wires.
CONTENTS
EXPLOSION HAZARD
Description ......................................................... 1
• Shut off main gas to appliance until installation is
Precautions ........................................................ 1
complete.
Specifications ..................................................... 2
Installation .......................................................... 3
Mounting & Wiring
Operation ........................................................... 6
Mounting Hole Template ..................................... 8
WHITE-RODGERS
EMERSON ELECTRIC CO.
PART NO. 37-6265F
9797 REAVIS ROAD
Replaces 37-6265E
Printed in U.S.A.
ST. LOUIS, MISSOURI 63123-5398
0327
www.white-rodgers.com

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   Summary of Contents for White Rodgers 50A55-843

  • Page 1: Installation Instructions

    INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE. The 50A55-843 is an automatic gas interrupted ignition control that employs a microprocessor to continually monitor, analyze, and control the proper operation of the gas burner, inducer, and fan.

  • Page 2: Specifications

    The control is factory-set at 30 seconds heat delay- to-fan-on, 180 seconds heat delay-to- fan-off and 45 seconds cool delay-to- fan-off. See OPERATION section for further information. 50A55-843 2 times 30, 45 60/90/ 120/180 45, 90 60 minutes...

  • Page 3

    WARNING FIRE HAZARD • Do not exceed the specified voltage. • Replace existing control with exact model and dash number. • Protect the control from direct contact with water (dripping, spraying, rain, etc.). • Label all wires before disconnection when servic- ing controls.

  • Page 4

    (LINE) HUMIDIFIER ELECTRONIC AIR CLEANER 50A55-843 furnace(s) TWINNING APPLICATIONS FLAME SENSOR PROBE LEGEND Low Voltage (24 VAC) Line Voltage (120 VAC) N. C. = Normally closed switch N. O. = Normally open switch TYPICAL SYSTEM WIRING DIAGRAM 120 VAC 24 VAC CLASS II...

  • Page 5

    HUM N (optional) spade terminal * The twinning feature is available only on models with six screw terminals; one of these terminals will be designated “TWIN”. All 50A55-843 controls used in twinning applications must have the “TWIN” terminal. † Maximum recommended flame probe wire length is 36 inches.

  • Page 6

    OPERATION OPTION SWITCHES The option switches on the 50A55-843 control are used to determine the length of the cool delay-to-fan-off, heat delay-to- fan-on and heat delay-to-fan-off periods. The following table shows the time periods that will result from the various switch positions.

  • Page 7

    Power supplied to both furnaces must be from the same phase of the incoming 120 VAC power. Connect the TWIN screw terminals on the 50A55-843 of the furnaces to be twinned to each other using a single wire (14-22 AWG.).

  • Page 8

    MOUNTING HOLE TEMPLATE MOUNTING HOLE TEMPLATE FOR MOUNTING HOLE LOCATIONS 4.172 .007 (2 plcs.) 6.402 .010 (2 plcs.) Refer to page 3 of the installation instructions for proper installation.

Comments to this Manuals

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  • Rachel Feb 25, 2013 10:07:
    There is no diagram of the product that names and points to the parts.
  • Rachel Feb 25, 2013 10:58:
    There is no picture of how the back of the product 50A55-843 looks. The circuit board is exposed showing the metal on top of the green backing, is this safe? What about metal on metal can this cause a fire?
  • Rachel Feb 25, 2013 10:19:
    There is no picture of how the back of the product 50A55-843 looks. The circuit board is exposed showing the metalon top of the green backing, is this safe? What about metal on metal can this cause a fire?
  • Rachel Feb 25, 2013 10:59:
    There is no picture of how the back of product the 50A55-843. The circuit board is exposed showing the metal on top of the green backing, is this safe? What about metal on metal? Can this cause a fire?