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107885-01D

For more information, visit www.desatech.com

For more information, visit www.desatech.com

11

11

INSTALLATION

Continued

INSTALLATION

Connecting To Gas Supply (Cont.)

Checking Gas Connections

Typical Inlet Pipe Diameters

GWRP16(T), GWRN18(T) -  3/8" or greater

GWRP26(T), GWRN30(T) - 1/2" or greater

Installation must include equipment shutoff valve, union, and
plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from heater (see Figure 14).

IMPORTANT:

 Install an equipment  shutoff valve in an accessible

location. The equipment  shutoff valve is for turning on or shutting
off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will
prevent excess sealant from going into pipe. Excess sealant in pipe
could result in clogged heater valves.

Install sediment trap in supply line as shown in Figure 14. Locate
sediment trap where it is within reach for cleaning. Locate sediment
trap where trapped matter is not likely to freeze. A sediment trap
traps moisture and contaminants. This keeps them from going into
heater controls. If sediment trap is not installed or is installed wrong,
heater may not run properly.

IMPORTANT:

  Hold the pressure regulator with wrench when

connecting it to gas piping and/or fittings. Do not over tighten pipe
connection to regulator. The regulator body could be damaged.

 WARNING: Use pipe joint sealant that is resistant

to liquid petroleum (LP) gas.

*  A CSA design-certified equipment shutoff valve with 1/8" NPT
tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 26.

Figure 14 - Gas Connection

Pressure Regulator

Tee Joint

Reducer
Bushing to
1/8" NPT

1/8" NPT
Plug Tap

Test
Gauge
Con-
nection*

Tee Joint

Pipe Nipple

Cap

Heater Cabinet

Sediment
Trap

Equipment
Shutoff Valve *

3"
Minimum

Natural Gas
From Gas Meter
(7" W.C. to 10.5" W.C.
Pressure)

Propane/LP
From External
Regulator
(11" W.C. to 14" W.C.
Pressure)

Regulator Bracket

3/8" NPT Pipe Nipple

Ground Joint Union

 WARNING: Test all gas piping and connections

for leaks after installing or servicing. Correct all leaks
at once.

 WARNING: Never use an open flame to check for

a leak. Apply a noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak. Correct all leaks
at once.

 CAUTION: For propane/LP gas, make sure exter-

nal regulator has been installed between propane/LP
supply and heater. See guidelines under 

Connecting

to Gas Supply, page 10.

Pressure Testing Gas Supply Piping System

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

1.

Disconnect appliance with its appliance main gas valve (con-
trol valve) and equipment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2 psig will damage heater
regulator.

2.

Cap off open end of gas pipe where equipment shutoff valve
was connected.

3.

Pressurize supply piping system by either opening propane/LP
supply tank valve for propane/LP gas or opening main gas valve
located on or near gas meter for natural gas, or using com-
pressed air.

4.

Check all joints of gas supply piping system. Apply a noncorrosive
leak detection fluid to all joints. Bubbles forming show a leak.

5.

Correct all leaks at once.

6.

Reconnect heater and equipment shutoff valve to gas supply.
Check reconnected fittings for leaks.

CHECKING GAS CONNECTIONS

Summary of Contents for GWRN18

Page 1: ...cause injury or property damage Refer to this manualforcorrectinstallationand operational procedures For as sistanceoradditionalinformation consult a qualified installer ser vice agency or the gas su...

Page 2: ...materials gasoline and other flammable vapors and liquids WARNING Do not use any accessory not ap proved for use with this heater Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning res...

Page 3: ...Operating heater above elevations of 4 500 feet could cause pilot outage 12 To prevent performance problems do not use propane LP fuel tank of less than 100 lbs capacity 13 Before using furniture pol...

Page 4: ...ction un lessprovisionsareprovidedforadequatecombustion and ventilation air Read the following instructions to insure proper fresh air for this and other fuel burning appliances in your home Unusually...

Page 5: ...tion air from the outdoors and vents to the outdoors Example Gas water heater _____________ Btu Hr Vent free heater _____________ Btu Hr Total _____________ Btu Hr WARNING If the area in which the hea...

Page 6: ...rs Provide extra fresh air by using ventilation grills or ducts You must provide two permanent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the...

Page 7: ...c candles cleaning fluids oil or kerosene lamps etc in the air exist may discolor walls or cause odors WARNING Never install the heater in a bedroom or bathroom in a recreational vehicle where curtain...

Page 8: ...nting bracket from heater carton Figure 6 Mounting Bracket Figure 5 Attaching Thermostat Sensing Bulb Figure 7 Removing Front Panel Of Heater Removing Front Panel Of Heater 1 Remove the four painted s...

Page 9: ...Screws Through Last Hole On Each End Floor Figure 8 Mounting Bracket Clearances 18 3 4 Min 16 Min 14 Adjoining Wall Only Insert Mounting Screws Through Last Hole On Each End Floor Attaching To Wall A...

Page 10: ...nection to the pres sure regulator IMPORTANT For natural gas check gas line pressure before connecting heater to gas line Gas line pressure must be no greater than 14 inches of water If gas line press...

Page 11: ...tional CSA design certified equipment shutoff valve from your dealer See Accessories page 26 Figure 14 Gas Connection Pressure Regulator Tee Joint Reducer Bushing to 1 8 NPT 1 8 NPT Plug Tap Test Gaug...

Page 12: ...sing com pressed air 3 Check all joints from gas meter for natural gas see Figure 16 or propane LP supply tank for propane LP gas to equipment shutoff valve see Figure 17 Apply a noncorrosive leak de...

Page 13: ...rty damage personal injury or loss of life LIGHTING INSTRUCTIONS Ignitor Button Control Knob Figure18 ControlKnobInTheOFFPositionforNon Thermostat Models 1 STOP Read the safety information above 2 Mak...

Page 14: ...knob will lock at the desired position WARNING When running heater set control knob at LOW MEDIUM or HIGH locked positions Never set control knob between locked positions Poorcombustionandhigherlevels...

Page 15: ...own and releasing the ignitor button This will light pilot If nec essary continue to press ignitor button until pilot lights If pilot does not light turn thermostat control knob clockwise Clockwise to...

Page 16: ...ontrolknobcanbesettoany2comfortlevelbetweenHIandLO All plaques will turn off and on Note The thermostat sensing bulb measures the temperature of airneartheheatercabinet Thismaynotalwaysagreewithroom t...

Page 17: ...amage the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes 2 Inspect burner pilot for dust and dirt 3 Blow air through the ports slots and hole...

Page 18: ...ght pounds Heater 20 28 Shipping 25 33 Note Dimensions listed are outer most points on the heater includes control knobs and grill For purposes of input adjustment GWRP16 GWRP26 GWRP16T GWRP26T Btu Va...

Page 19: ...tat control knob is not in pilot position thermostat models only REMEDY 1 Replace pilot assembly 2 Replace pilot assembly 3 Reconnect ignitor cable 4 Free ignitor cable if pinched by any metal or tubi...

Page 20: ...7 or replace burner orifice s 1 Clean burner orifice s see Cleaning and Maintenance page 17 or replace burner orifice s 2 Replace burner 3 Replace gas regulator 1 Replace burner 2 Contact local natura...

Page 21: ...w line pressure 3 ODS pilot is partially clogged 1 Gas leak SeeWarning statement at top of page 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak SeeWarning statem...

Page 22: ...desatech com 22 ILLUSTRATED PARTS BREAKDOWN Cabinet Body Models GWRP16 GWRN18 GWRP26 GWRN30 GWRP16T GWRN18T GWRP26T GWRN30T 14 15 8 5 6 7 4 3 1 2 See Pages 24 and 25 16 10 9 11 12 13 17 ILLUSTRATED PA...

Page 23: ...acket 1 8 098271 09 098271 09 098271 09 098271 09 098271 09 098271 09 098271 09 098271 09 Ignitor Cable 1 9 098462 01 098462 01 098462 01 098462 01 ____ ____ ____ ____ Control Rod Assembly 1 10 098325...

Page 24: ...dels GWRP16 GWRN18 GWRP26 GWRN30 GWRP16T GWRN18T GWRP26T GWRN30T ILLUSTRATED PARTS BREAKDOWN BURNER ASSEMBLY GWRP16 GWRN18 GWRP26 GWRN30 GWRP16T GWRN18T GWRP26T GWRN30T ODS PILOT 5 8 10 7 11 12 9 4 4...

Page 25: ...098508 01 098508 01 098508 01 098508 01 _____ _____ _____ _____ Valve Retainer Nut 1 7 099056 25 099056 24 099056 25 099056 24 099056 25 099056 24 099056 25 099056 24 Injector Plaque A or C 1 8 09905...

Page 26: ...lete installation and operating instructions included Thermostatically controlled blower turns itself on and off as re quired ACCESSORIES Purchasetheseheateraccessoriesfromyourlocaldealer Iftheycan no...

Page 27: ...ted College Completed Graduate School 13 Age of Purchaser Under 20 20 29 30 39 40 49 50 59 60 or Over 14 Buyer s total annual household income Under 15 000 15 000 to 19 999 20 000 to 34 999 35 000 to...

Page 28: ...107885 01D For more information visit www desatech com For more information visit www desatech com 28 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 Postage Required TM TAPE TAPE...

Page 29: ...1 800 654 8534 Fax 1 800 846 0090 franktalk aol com Master Parts Dist 1251 Mound Ave NW Grand Rapids MI 49504 2672 616 791 0505 1 800 446 1446 Fax 616 791 8270 www nbmc com Washer Equipment Co 1715 M...

Page 30: ...r maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility...

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