Emerson White Rodgers 36C94-303 Installation Instructions Manual

36C94-303

Delay-Opening Combination Gas Valve

INSTALLATION INSTRUCTIONS

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CARE­FULLY BEFORE INSTALLING OR OPERATING THIS CONTROL
COULD CAUSE PERSONAL INJURY AND/OR PROPERTY
DAMAGE.

DESCRIPTION

36C94-303 is a direct replacement for 36C94-302,
36E93-301, 36E93-302, 36E93-303 and 36E93-304.

The 36C94-303 combination gas valve is designed
for intermittent ignition system applications. The
valve is equipped with a redundant solenoid valve

that controls gas ow to the pilot and main burners, a
main valve that controls gas ow to the main burner,

a pressure regulator to maintain a constant outlet
pressure, integral gas pressure switch and a two

position on/o switch for electrical shuto.

Pipe Size

Available (inches)

1/2" x 3/4" NPT 230,000 370,000

Type of Gas: Natural gas
LP gas (use conversion kit)

Pressure Regulator Adjustment Range:
Nat. Gas – 2.5 to 5.0" W.C.
L.P. Gas – 7.0 to 12" W.C.
Ambient Temperature:

–40 to +175°F (–40 to 79°C)

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PIPE SIZE/CAPACITIES

Capacity (BTU/hr) at 1” W.C.

pressure drop across valve

AGA Std. Nat. Gas

(1,000 btu/ cu. ft.)

Pressure Rating: 14" W.C. (1/2 PSI) max.
Voltage: 24 VAC
Frequency: 60 Hz
Current: 0.6 A

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

Specications ............................................. 1

Precautions ................................................ 3

Installation .................................................. 4

Lighting Instructions ................................... 7

French Language ....................................... 9

Spanish Language ........................................17

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SPECIFICATIONS

LP. Gas

(2,500 btu/cu. ft.)

CONTENTS

PART NO. 37-7086C

Replaces 37-7086B

1305

Upright, 90° from upright or vertical

to replacement control.

SPECIFICATIONS

Parts and Accessories:

F92-0656 - LP to Natural Gas Conversion Kit for use on Single Stage 36C, D, E, F, G, H, J valves.
Regulation range 2.5" to 5.0" W.C.

F92-0659 - Natural to Regulated LP Gas conversion Kit for use on Single Stage 36C, D, E, F, G,
H, J valves. Regulation range 7.0" to 12.0" W.C.

UPRIGHT

LEFT OR RIGHT

NOTE: Control shown may not be identical

Figure 1. Mounting positions

4.00 R
SWING RADIUS

3.89
REF.

5.09

.89

1.25

INLET BOSS
UP OR DOWN

BARBED HOSE FITTING
MUST BE REINSTALLED
IF REGULATOR
IS READJUSTED

PRESSURE ADJUSTING
SCREW IS BENEATH
THE BARBED
HOSE FITTING

OUTLET
PRESSURE TAP
1/8”-27 N.P.T.

1.08
PILOT GAS OUTLET
CONNECTION
FOR 1/4” O.D. TUBE

2

.88

1.44

.88

2.87

OUTLET 3/4”-14 N.P.T.
THDS. WITH SCREEN

Figure 2. Gas Valve, Outlet Side

!

WA RNING

!

PRECAUTIONS

DO NOT BEGIN INSTALLATION UNTIL YOU READ THE FOLLOWING
PRECAUTIONS.

If you do not follow these instructions exactly, a fire or

!

WARNING

1. Failure to turn o electric or main gas supply to heating system could cause personal injury
and/or property damage by shock, gas suocation, re, and/or explosion.

2. Do not use this control on circuits exceeding specied voltage. Higher voltage will damage
the control and may cause shock or re hazard.

3. NEVER USE FLAME OR ANY KIND OF SPARK TO CHECK FOR GAS LEAKS–COULD CAUSE
FIRE AND/OR EXPLOSION.

4. Do not use a control set for natural gas with LP gas, or a control set for LP gas with natu-

ral gas. Personal injury and/or property damage, gas suocation, re, and/or explosion

may result.

1. Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring

can cause equipment damage, property damage and/or personal injury.

2. This control is not intended for use in locations where it may come in direct contact with

water. Suitable protection must be provided to shield the control from exposure to water
(dripping, spraying, rain, etc.).

explosion may result causing property damage, personal
injury or loss of life.

CAUTION

Before beginning any modication, be sure ALL electrical disconnects are in the OFF position.

TAG THE DISCONNECT SWITCHES WITH A SUITABLE WARNING LABEL. Electrical shock can
cause personal injury or death.

3

INSTALLATION

Supply

Supply

Supply

MAIN PIPING CONNECTIONS

NOTE

Refer to warnings and cautions on page 3 before
attempting installation. All piping must comply
with local codes, ordinances, and/or national fuel
gas codes.

1. Shut o power to the unit and install Lock-

Out tag on all disconnects and breakers.

2. Turn o main gas supply line valve.

3. Mark all wires going to the old valve with the

terminal description that they are attached
to.

4. If replacing an existing valve, disconnect all
plumbing and electrical connections from the
old control.

5. The control may be installed in any orienta­tion except upside down (see gure 1). The
arrow on the valve indicates the direction of

gas ow through the control.

6. You should use new pipe that is properly
chamfered, reamed, and free of burrs and
chips. If you are using old pipe, be sure it is
clean and free of rust, scale, burrs, chips, and
old pipe joint compound.

7. Apply pipe joint compound (pipe dope) that
is approved for all gases, only to the male
threads of the pipe joints. DO NOT apply

compound to the rst two threads (see gure

3 for typical piping connections).

8. Install gas valve by holding inlet boss with ad-

justable wrench. Do not tighten excessively,
as this may damage the valve (Torque: 375
in-lb maximum). Do not cross-thread during
installation as this may damage the valve.

9. If the original gas valve has a barbed hose

tting, install pressure tube on barbed hose
tting of the replacement valve. Ensure that

the pressure tube will not kink.

10. Do not remove barbed hose tting from

replacement valve even if the original valve
does not have it.

11. Some applications will require modication of

the pilot tube.

12. See SYSTEM WIRING when making electrical
connections. Connect wires per Fig. 4 Diagram
and Fig. 5 Chart.

13. After installation is complete, check the
operation of the unit and, with main burners

ring, check all joints for leaks using a leak

detection solution. Retighten all joints where
bubbles appear. DO NOT USE OPEN FLAME
TO CHECK FOR LEAKS

NOTE: A MANUAL SHUTOFF VALVE

MUST BE INSTALLED WITHIN
6 FEET OF THE EQUIPMENT

Drop

Horizontal

3 in.

minimum

Piped Gas

4

NOTE

All piping must comply with local codes, ordinances,
and/or national fuel gas codes.

Gas Valve

Riser

Gas Valve

Figure 3. Typical Gas Valve Piping

minimum

Piped Gas

3 in.

NOTE: ALWAYS INCLUDE A
DRIP LEG IN PIPING

Horizontal

Riser

3 in.

minimum

Tubing Gas

Drop

Gas Valve

(REDUNDA

ON/OFF

VALVE WIRING

PILOT ADJ.

INSTALLATION

NOTE

SYSTEM WIRING

REFER TO AND FOLLOW THE APPLIANCE MANUFACTURER'S WIRING DIAGRAM. REFER
TO FIG. 4 FOR TERMINAL IDENTIFICATION.

All wiring should be installed in accordance with
local and national electrical codes and ordinances.

Always check that the electrical power supply used
agrees with the voltage and frequency shown on
the gas control.

5

1

4

2
3

36E93

Terminal Panel

36E93-301
36E93-302
36E93-303

Description Term and Size

36E93-304

Old Terminals

5

1

Pilot (Redundant) Coil

Main Coil

SWITCH

C

MAIN

PILOT

NT)

PRESSURE
SWITCH

ELECTRICAL SCHEMATIC

36C94-303

Figure 4. Valve Wiring

1

3

2

4

36C94

Terminal Panel

36C94-303
36C94-302

New Terminals

1/4" Male Spade 3

1/4" Male Spade 1

36C

2

1

FLAME

SWITCH

4

3

4

2
3

Pressure Switch

Common

1/4" Male Spade with 1/4"

x 3/16" adapter installed

1/4" Male Spade 2

4

Figure 5. Terminal Connection Old/New

5

INSTALLATION

PILOT ADJUSTIN
COVER SCRE

.58

4.53

4.00

INLET 1/2"-14 N.P.T.
THDS. WITH SCREEN

INLET
1/8"-27 N.P.T.
PRESSURE TAP

4.00 R
SWING RADIUS

1.44

2.87

1.25

5.09

3.89
REF.

.89

.88

4.53

4.00 R
SWING RADIUS

BARBED HOSE FITTING
MUST BE REINSTALLED
IF REGULATOR
IS READJUSTED

PRESSURE ADJUSTING
SCREW IS BENEATH
THE BARBED
HOSE FITTING

OUTLET
PRESSURE TAP
1/8”-27 N.P.T.

PILOT GAS OUTLET
CONNECTION
FOR 1/4” O.D. TUBE

OUTLET 3/4”-14 N.P.T.
THDS. WITH SCREEN

.88

1.44

2.87

1.25

5.09

3.89
REF.

.89

1.08

.88

Pilot Gas Connection

Install tting into pilot gas outlet (see Fig. 2), turning
until nger-tight. Insert clean, deburred tubing all
the way through the tting. While holding the tubing
securely, slowly tighten tting until you feel a slight
"give." Tighten the tting an additional 1-1/2 turns.

Conversion from Natural to L.P. Gas. Refer to
conversion kit installation instructions.

Outlet Pressure Adjustment

This control is shipped from the factory with the
regulator set to 3.5" W.C. (Natural gas full ow). If
required, the regulator can be adjusted for outlet
pressures normally ranging from 2.5 to 5" W.C.
(natural gas) or 7.5 to 12" W.C. (L.P. gas). Do not

force the adjusting screw beyond the limits that
it can easily be adjusted.

Inlet/Outlet pressure test ports are 1/8" NPT (see
Fig. 2). For testing pressure, the outlet pressure
tap plug will need to be removed and a separate

hose tting installed. After testing pressure with a
manometer remove hose tting and re-install plug.

Tighten to 60 in-lb max.

1. Attach the manometer to the outlet pressure

tap of the valve.

2. Energize system to ignite main burner.

3. Remove barbed hose tting.

4. To DECREASE outlet pressure, turn the

adjusting screw (beneath the barbed hose

tting) counterclockwise.

To INCREASE outlet pressure, turn the

adjusting screw clockwise.

5. Replace the barbed hose tting. Cycle the

valve two or three times to verify regulator
setting.

Pilot Gas Adjustment

This control was factory preset and will not normally

require additional adjustment of pilot ame.
If the pilot ame requires adjustment, remove the

pilot adjusting cover screw and gasket (see Fig. 6).
To REDUCE pilot ame, turn the pilot adjust screw
(beneath the cover screw) clockwise. To INCREASE
pilot ame, turn the pilot adjust screw counter­clockwise. Replace gasket and tighten cover screw.

W

Figure 6. Gas Valve, Top

6

INLET
1/8"-27 N.P.T.
PRESSURE TAP

INLET 1/2"-14 N.P.T.
THDS. WITH SCREEN

G

1/4” X 3/16”
TERMINAL
ADAPTER

.58

4.00

Figure 7. Gas Valve, Side

LIGHTING INSTRUCTIONS

OPERATING INSTRUCTIONS

TO TURN OFF GAS TO APPLIANCE

FOR YOUR SAFETY READ BEFORE OPERATING

!

WARNING

A. This appliance is equipped with an intermittent ignition device which automatically lights the

appliance. Do not try to light the pilot by hand.

B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the

oor because some gas is heavier than air and will settle on the oor.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s

instructions.

• If you cannot reach your gas supplier, call the re department.

C. Do not use this appliance if any part has been under water. Immediately call a qualied service

technician to inspect the appliance and to replace any part of the control system and any gas
control which has been under water.

1. STOP! Read the safety information above on this page.

2. Set the thermostat to lowest setting.

3. Turn o all electric power to the appliance.

4. This appliance is equipped with an ignition device which automatically lights the burner. Do not

try to light the burner by hand.

5. Remove control access panel.

6. Push On/O switch to "OFF."

7. Wait ve (5) minutes to clear out any gas. If you then smell gas, STOP! Follow “B” in the safety

information above. If you don’t smell gas, go to the next step.

8. Push On/O switch to “ON.”

9. Replace control access panel.

10. Turn on all electric power to the appliance.

11. Set thermostat to desired setting.

12. If the appliance will not operate, follow the instructions “To Turn O Gas To Appliance” and call

your service technician or gas supplier.

If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.

FOR YOUR SAFETY

“WHAT TO DO IF YOU SMELL GAS”

1. Set the thermostat to lowest setting.

2. Turn o all electric power to the appliance if
service is to be performed.

3. Remove control access panel.

4. Push On/O switch to “OFF.”

5. Replace control access panel.

7

White-Rodgers is a business
of Emerson Electric Co.

The Emerson logo is a
trademark and service mark
of Emerson Electric Co.

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