White Rodgers 50E47 User Manual

50E47

WHITE-RODGERS

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.

The White Rodgers 50E47 is an automatic gas inter­rupted ignition control employing a microprocessor to
continually monitor, analyze, and control the proper op­eration 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.

Hot Surface Ignition Control

INST ALLA TION INSTRUCTIONS

DESCRIPTION

GENERAL PRECAUTION

!

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, includ­ing dash number. Failure to use exact replace­ment 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 compo­nents could cause the control to malfunction.

CONTENTS

Description......................................................... 1

Precautions........................................................ 1

Specifications..................................................... 2

Installation.......................................................... 3

Mounting & Wiring

Operation ............................................................ 4

PRECAUTIONS

CAUTION

!

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 ser­vicing controls. Wiring errors can cause im­proper and dangerous operation.

This control is not intended for use in locations
where it may come in contact with water. Suit­able protection must be provided to shield the
control from exposure to water (dripping, spray­ing, rain, etc.).

WARNING

!

Do not use on circuits exceeding specified volt­age. Higher voltage will damage control and
could cause shock or fire hazard.

Do not short out terminals on gas valve or pri­mary control to test. Short or incorrect wiring will
damage thermostat and could cause personal
injury and/or property damage.

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398

R

Printed in U.S.A.

PART NO. 37-4836B

Replaces 37-4836A

9541

SPECIFICATIONS

60 Hz 50 Hz

Flame Establishing Time

Standard 4.0 sec 4.8 sec
Optional 7.0 sec 8.4 sec

Flame failure Response time: 0.8 sec 0.96 sec

ELECTRICAL RATINGS:
Input Voltage: 25 VAC 50/60 Hz
Current: 0.2 amp
Relay Contact Ratings:

Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 6.0 amp @ 120 VAC 50/60 Hz-

resistive

Flame Current Requirements:

Minimum current to insure flame detection: 2 µa DC*
Maximum current for non-detection: 0.2 µa DC*
Maximum allowable leakage resistance: 100 M ohms

* Measured with a DC microammeter in the flame

probe lead

OPERATING TEMPERATURE RANGE:

-40° to 175°F (-40° to 80°C)

(all times in seconds unles otherwise noted)

Ignitor

Warmup

Period Dash Number Pre-purge Retries

-1 thru -9 0 17 4 1 0 4 0 21

-10 thur -19 0 45 4 1 0 4 0 49

-20 thru -29 30 17 4 1 0 4 0 51

-30 thru -39 30 45 4 1 0 4 0 79

-40 thru -49 30 17 4 1 2 12 90 293

-50 thru -59 30 45 4 1 2 12 90 377

-60thru -69 0 17 4 1 2 12 60 203

-70 thru -79 0 45 4 1 2 12 60 287

-101 thru -109 0 17 7 4 0 7 0 24

-110 thru -119 0 45 7 4 0 7 0 52

-120 thru -129 30 17 7 4 0 7 0 54

-130 thru -139 30 45 7 4 0 7 0 82

-140 thru -149 30 17 7 4 2 21 90 302

-150 thru -159 30 45 7 4 2 21 90 386

-160 thru -169 0 17 7 4 2 21 60 212

-170 thru -179 0 45 7 4 2 21 60 296

-201 thru -209 0 17 4 1 0 4 0 21

-210 thru -219 0 45 4 1 0 4 0 49

-220 thru -229 30 17 4 1 0 4 0 51

-230 thru -239 30 45 4 1 0 4 0 79

-240 thru -249 30 17 4 1 2 12 90 293

-250 thru -259 30 45 4 1 2 12 90 377

-260 thru -269 0 17 4 1 2 12 60 203

-270 thru -279 0 45 4 1 2 12 60 287

-301 thru -309 0 17 7 4 0 7 0 24

-310 thru -319 0 45 7 4 0 7 0 52

-320 thru -329 30 17 7 4 0 7 0 54

-330 thru -339 30 45 7 4 0 7 0 82

-340 thru -349 30 17 7 4 2 21 90 302

-350 thru -359 30 45 7 4 2 21 90 386

-360 thru -369 0 17 7 4 2 21 60 212

-370 thru -379 0 45 7 4 2 21 60 296

NOTE: All times are in nominal seconds at 60 Hz. Multiply all timings by 120% at 50 Hz.

Reset time is 2.3 seconds max. at power-up.

2

On controls with retry option, ignitor warm-up time is increased by 10 seconds on retry

HUMIDITY RANGE:

To 95% relative humidity (non-condensing)

MOUNTING:

Surface mount or 4" x 4" junction box

Timing Specs (see table below for variable timings):

maximum

Recycle Time: Immediate, or equal to prepurge time

on models with prepurge option.

Gases Approved: Natural, Manufactured, Mixed,

Liquid Petroleum, and LP Gas Air Mixtures are all
approved for use.

TIMING SPECIFICATIONS

Trial for
Ignition

Period

Ignition

Activation

Period

Valve

Sequence

Period Interpurge

Lockout

Time