White Rodgers 36C74 User Manual download pdf

Printed in U.S.A.

PART NO. 37-5868A

Replaces 37-5153A

9732

WHITE-RODGERS

CONTENTS

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

Specifications ..................................................... 1

Precautions ........................................................ 2

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

Main Piping Connection

Pilot Gas Connection

System Wiring

Adjustment ......................................................... 4

Pilot Flame Adjustment

Pressure Regulator Adjustment

Pilot Lighting Instructions and Precautions ........ 5

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.

DESCRIPTION

The 36C74 Gas Valve is for use on systems providing

automatic ignition of the pilot and/or main burners and

incorporates the following features: pilot/redundant sole-

noid valve, main valve, integral pressure regulator and

male spade terminals for point-to-point wiring.

This gas valve is also equipped with a step-opening

feature to provide for quieter main burner ignition. The

valve opens partially until main burner flame is estab-

lished, then the valve opens to full operating pressure.

Electrical Rating:

24 VAC (30 Volts max. Voltage), 60 Hz.

Types of Gases: Natural or LP Gas

Pressure Rating: 14” W.C. (

⁄2 PSI)

Ambient Temperature: -40° to 175°F (-40° to 79°C)

Regulator Adjustment Range:

Natural Gas: 2.5” to 5.0” W.C. (Full flow)

LP Gas: 7.5” to 12.0” W.C. (Full flow)

(Step pressure not adjustable)

SPECIFICATIONS

INSTALLATION INSTRUCTIONS

Type 36C74

Combination Gas Valve

INLET BOSS

UP OR DOWN

UPRIGHT

LEFT OR RIGHT

Upright, 90° from upright or vertical

NOTE: Control shown may not be identical

to replacement control.

OFF

Figure 1. Mounting Positions

PIPE SIZES/CAPACITIES



Pipe Size

(inches)

Capacity (BTU/hr) at

1" pressure drop across valve

/2" x

/8"

/2" x

/2"

/2" x

/4"

/4" x

/4"

100,000

230,000

280,000

162,000

372,600

453,600

Nat. Gas

(1000 BTU/cu. ft.,

64 Sp. Gr.)

LP Gas

(2500 BTU/cu. ft.,

1.53 Sp. Gr.)

OFF

1 2 3 4 5 6

Summary of Contents

Page 1 - Type 36C74

Printed in U.S.A.PART NO. 37-5868AReplaces 37-5153A9732WHITE-RODGERSCONTENTSDescription ... 1Spe

Page 2 - THE FOLLOWING PRECAUTIONS

2DO NOT BEGIN INSTALLATION UNTIL YOU READTHE FOLLOWING PRECAUTIONS.PRECAUTIONS1. Failure to turn off electric or main gas supplyto heating system coul

Page 3 - PILOT GAS CONNECTION

3INSTALLATIONMAIN PIPING CONNECTIONSAll piping must comply with local codes, ordinances,and/or national fuel gas codes.1. Turn off electrical power to

Page 4

4SYSTEM WIRINGREFER TO AND FOLLOW THE APPLIANCEMANUFACTURER’S WIRING DIAGRAM. REFER TOFIG. 4 FOR TERMINAL IDENTIFICATION.INSTALLATION (con’t)Pilot Adj

Page 5 - AND PRECAUTIONS

5PILOT LIGHTING INSTRUCTIONSAND PRECAUTIONSFOR YOUR SAFETY READ BEFORE LIGHTINGWARNING!If you do not follow these instructions exactly, a fire or expl

Page 6 - 9797 Reavis Road

If you need more information about this product, please write to us at:WHITE-RODGERS DIVISION, Emerson Electric Co.9797 Reavis RoadSt. Louis, MO 63123

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White Rodgers 36C74 User Manual

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