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Application of this type of control may cause
flame rollout on initial startup and could cause
personal injury and/or property damage.
Replace only with exact model number, includ-
ing dash number. Failure to use exact replace-
ment control could cause personal injury and/or
property damage.
If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air
conditioning contractor or licensed electrician.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting compo-
nents could cause the control to malfunction.
Printed in U.S.A.
50E47
Hot Surface Ignition Control
PART NO. 37-4836B
Replaces 37-4836A
9541
INSTALLATION INSTRUCTIONS
WHITE-RODGERS
R
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
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.
CONTENTS
Description ......................................................... 1
Precautions ........................................................ 1
Specifications ..................................................... 2
Installation.......................................................... 3
Mounting & Wiring
Operation ............................................................4
To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete.
Label all wires prior to disconnection when ser-
vicing controls. Wiring errors can cause im-
proper and dangerous operation.
This control is not intended for use in locations
where it may come in contact with water. Suit-
able protection must be provided to shield the
control from exposure to water (dripping, spray-
ing, rain, etc.).
Do not use on circuits exceeding specified volt-
age. Higher voltage will damage control and
could cause shock or fire hazard.
Do not short out terminals on gas valve or pri-
mary control to test. Short or incorrect wiring will
damage thermostat and could cause personal
injury and/or property damage.
DESCRIPTION
The White Rodgers 50E47 is an automatic gas inter-
rupted ignition control employing a microprocessor to
continually monitor, analyze, and control the proper op-
eration of the gas burner.
Signals interpreted during continual surveillance of the
thermostat and flame sensing element initiate automatic
ignition of the burner, sensing of the flame and system
shut-off during normal operation.
System fault analysis, which quickly shuts off the gas flow,
coupled with automatic re-ignition upon sensing a fault
correction, highlight the control’s capabilities.
PRECAUTIONS
GENERAL PRECAUTION
!
CAUTION
!
WARNING
!