White Rodgers 37C73U Bedienungsanleitung

FOR YOUR SAFETY

“WHAT TO DO IF YOU SMELL GAS”

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

• Immediatelycallyourgassupplierfromaneighbor’s

phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire

department.

Do not use this Natural Gas control on a LP Gas

water heater. Improper operation could occur, re-

sulting in personal injury and/or death due to Car-

bonMonoxidepoisoning,fire,orexplosion.Check

for proper gas type as listed on the rating plate

affixed to the water heater.

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS BEFORE INSTALLING OR OPERATING THIS

CONTROL COULD CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH.

RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.

WARNING

1. This control must be installed or serviced only by a

professional.

2. Do not use force when moving the gas control knob. If

you cannot turn the knob with hand pressure only, the

control must be replaced.

3. Do not use the control if the knob will not “pop up” after

being depressed while the knob is in the PILOT posi-

tion. The mechanism is damaged and the control must

be replaced. Shut off gas to the water heater.

4. For your safety, this control is supplied with tamper

resistant screws. Do not attempt to repair or adjust the

control.Ifyouexperienceproblems,replacethecontrol

immediately. Continuing to use a damaged control

could result in fire and/or explosion.

5. An odorant has been added to the gas to help you

detect it. Before lighting, search for the odor of gas by

sniffing at floor level around the water heater.

6. Insomesituations,thegasmayloseitsodor.Todetect

unodorized gas, you must have a gas detector which

canbepurchasedfromyourgascompany.Ifyoudonot

have a detector and have the slightest suspicion that

gas may be present, get out of the house and call the

gas company. DO NOT RELY TOTALLY ON YOUR

NOSE.

Scald burns occur in under one second with 160°

water, which this thermostat will deliver if the

temperature dial is set at “VERY HOT”. Lower

settingsofthetemperaturedialwillreducetherisk

of scald and will reduce your fuel bill.

WARNING

RISK OF SCALDING

INCREASES WITH

HOTTER WATER

CAUTION:

37C73U

Water Heater Thermostat Control

Installation Instructions

FOR NATURAL GAS ONLY

WHITE-RODGERS

Printed in U.S.A.

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

PART NO. 37-6092A

9912

Fixed Adjustment Main and Pilot Regulators

The main and pilot gas regulators require no field

service. They automatically control and maintain the

outlet main and pilot burner gas pressure.

INSTALLATION

REPLACEMENT INFORMATION

REMOVING OLD CONTROL

1. Shut off gas to water heater.

2. Shut off water at cold water inlet.

3. Connect hose to heater drain cock. Drain water to a

nearby drain. Open a hot water faucet for faster drain-

ing.

4. Disconnect gas line at union (figure 1). Remove piping

from old control.

5. Disconnect the:

a. Thermocouple (left side).

b. Pilot burner (small tube on the right side)

c. Main burner (large tube in the middle).

6. Remove the control by turning it counterclockwise

(). If needed, a short piece of 1/2” black iron pipe

can be screwed into the control inlet to increase lever-

age.

SPECIAL INSTALLATION NOTE

If replacing a Unitrol or Robertshaw control, install exten-

sion adaptor fitting provided into the outlet of the control.

If replacing a control with 3/8" NPT outlet, install small

adaptor fitting provided into the outlet of the control.

INSTALLING NEW CONTROL

All piping must comply with local and state ordinances or

withtheNationalFuelGasCode(ANSIZ223.1–NFPA54),

whichever applies.

Dirt or contamination in the gas line can block the control

from operating creating a risk of explosion, injury or death.

To protect the control from dirt/contamination, a drip leg or

sediment trap (see Figure 1) must be installed in the piping

leading to the control.

1. Apply pipe joint compound to the male threads of

control, leaving the first two or three threads clean.

2. Install control in tank. Turn clockwise ( ). Use a

shortpieceofpipetohelpinturning.Alignthecontrolso

that burner and pilot tubes may be connected.

3. Make burner, pilot, and thermocouple connections. Do

not use pipe joint compound or teflon tape. Thermo-

couplenutshouldbehandtightenedandthenturnedan

additional1/4turnwithasmallwrench.DONOTOVER-

TIGHTEN.

4. Connectgasline.Usenewblackironpipethathasbeen

properly reamed. If old pipe is used, be sure it is clean

and free from rust and scale. Use pipe joint compound

on male threads only. (Use a pipe joint compound

approvedfor natural gasservice.) Do notuseTEFLON

tape. Do not apply compound to first two threads.

5. DO NOT use joint compound or tape on the union

connection.

To pilot

burner

To main burner

To thermocouple

RISK OF SCALDING

INCREASES WITH

HOTTER WATER

CAUTION:

Figure 1. Typical gas connection

Drip leg

(sediment trap)

Pipe cap

Tee

Union

(metal-to-metal)

Gas shut-off

valve

Gas supply

pipe

6. To fill the water heater with water:

a. Close the water heater drain valve by turning the

handletotheright(clockwise).Thedrainvalveison

the lower front of the water heater.

b. Open the cold water supply valve to the water

heater.

The cold water supply valve must be left open

when the water heater is in use.

c. To ensure complete filling of the tank, let air exit by

openingthenearesthotwaterfaucet.Allowwaterto

run until a constant flow is obtained. This will let air

out of the water heater and the piping.

d. Check all new water piping for leaks. Repair as

needed.

Never use this water heater unless it is completely

filled with water. To prevent damage to the tank,

the tank must be filled with water. Water must flow

from the hot water faucet before turning ON gas to

the water heater.

7. Open gas shutoff valve.

NOTE

CAUTION

8. BEFORE LIGHTING THE PILOT, CHECK THE GAS

LINES FOR LEAKS:

a. Use a soapy water solution. DO NOT test for gas

leaks using a match or open flame.

b. Brush the soapy water solution on all gas pipes,

joints, and fittings.

c. Check for bubbling soap. This means you have a

leak. Turn OFF the gas and make the necessary

repairs.

d. Recheck for leaks.

e. Rinse off soapy solution and wipe dry.

TO LIGHT APPLIANCE

6. Turn gas control knob counterclockwise

to “PILOT”.

7. Depress control knob all the way and hold down.

Immediately light the pilot with a match. Continue to

hold knob down for approximately one (1) minute after

pilot is lit. Release knob and it will pop back up. Pilot

should remain lit. If pilot goes out, repeat steps 2, 3, 6

and 7.

• If knob does not pop up when released, turn knob

clockwise to “OFF”. STOP and immediately call

your service technician or gas supplier.

• Ifthe pilotwillnot staylitafter severaltries,turn gas

control knob to “OFF” and call your service techni-

cian or gas supplier.

8. Replace inner and outer burner doors.

9. At arm's length away, turn gas control

knob counterclockwise to the full “ON”

position.

10. Align the water temperature dial mark ( ) with the

temperaturepointer onthe cover.Thismark, indicative

of approximately 120°F, is the preferred starting point.

Ifhotter waterisdesired, seeTEMPERATURE REGU-

LATION on page 4.

11. Check for leaks at the pilot and main burner fittings on

thegascontrolwiththemainburnerfiring.Use asoapy

water solution.Ifaleakisdetected,turnthegassupply

off and make repairs.

NOTE

DO NOT USE OPEN FLAME OR ANY KIND OF

SPARK TO CHECK FOR LEAKS. Serious injury or

death from fire or explosion could result.

9. Affix the new Lighting Instruction label on the water

heater to cover the existing label.

The rating plate must be left visible for future reference.

1. Set control to lowest setting by turning the water tem-

perature dial clockwise ( ) to the “PILOT LIGHT-

ING” position. DO NOT FORCE.

2. Turn gas control knob clockwise to “OFF”.

Gas control knob must be depressed slightly to turn

from"PILOT" to "OFF". Do not use tools or exces-

sive force.

3. Wait at least five (5) minutes to clear out any gas, and

thensmellaroundtheappliancearea.Ifyou smell gas,

STOP! Follow instructions “What to do if you smell

gas”onthe firstpageofthisinstruction sheet.Ifyoudo

not detect gas, continue with the next step.

4. Remove inner and outer burner doors located on the

water heater under gas control unit.

5. Find pilot - follow small metal

tubes from gas control. The

pilot is located near the main

burner.

RISK OF SCALDING

INCREASES WITH

HOTTER WATER

CAUTION:

WATER

TEMPERATURE

DIAL

Figure 2. Gas Control Knob and

Water Temperature Dial

GAS

CONTROL

KNOB

TEMPERATURE

POINTER

WARNING

NOTE

PILOT

BURNER THERMO-

COUPLE

TEMPERATURE REGULATION

After the gas connections are made, water is in the heater

and the pilot light is ignited, the control must be set to the

desired water temperature.

The recommended water temperature dial setting is at the

arrow ( ). The water temperature out of the heater at this

setting will be approximately 120°F.

If you use hot water frequently and in short spurts, water

temperaturecan occasionallyexceed thetemperatureset-

tingbyupto30°Fbecauseofthedynamicsoftheappliance.

The arrow ( ) setting is the safest and most economical. If

you want hotter water, rotate the water temperature dial

counterclockwise( )toahighersetting.Approximate

water temperature delivered at the different settings is

shown in the following table.

TO TURN OFF GAS TOAPPLIANCE

Set the control to lowest setting by turning water tempera-

ture dial clockwise ( ) to the “PILOT LIGHTING”

position on dial (as shown in Figure 3). DO NOT FORCE.

Turn gas control knob clockwise to “PILOT”.

Turn gas control knob clockwise to “OFF”.

Gas control knob must be depressed slightly to turn from

“PILOT” to “OFF”. Do not use tools or excessive force.

NOTE

WARNING

To avoid scald injury, set the control at the lowest setting

which will still deliver your needed hot water.

The hotter the water the greater the risk of scald

injury and the shorter the time to cause injury.

Be sure to protect babies and the infirm or others with

impaired mobility who cannot get out of the hot water

quickly. They are the people most commonly hurt in

scaldinjuriesandinneedoflowertemperatureandother

protection like supervision, point-of-use temperature

control equipment or a system mixing valve. A point-of-

usevalveor a system mixing valve canbeobtainedfrom

your plumber.

Never allow small children to use a hot water tap,

ortodrawtheirownbathwater.Neverleaveachild

or impaired person unattended in a bathtub or

shower. Scald burns can result.

APPROXIMATE APPROXIMATE

SETTING TEMPERATURE TIME TO

(°F) CAUSE INJURY

( ) 120°±10°5 Minutes

A 130°±10°30 Seconds

B 140°±10°5 Seconds

C 150°±10°1.5 Second

VERY

160°±10°Under 1 Second

HOT

Review and leave these instructions with the consumer!

RISK OF SCALDING

INCREASES WITH

HOTTER WATER

CAUTION:

Figure 3. Water Temperature Dial

TEMPERATURE

POINTER

WATER

TEMPERATURE

DIAL

WARNING

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