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107886-01J

POSSIBLE CAUSE

1. Control knob not fully

pressed in

2. Control knob not pressed in

long enough

3. Safety interlock system has

been triggered

4. Equipment shutoff valve not

fully open

5. Thermocouple connection

loose at control valve

6. Pilot ﬂame not touching ther-

mocouple, which allows ther-

mocouple to cool, causing

pilot flame to go out. This

problem could be caused by

one or both of the following:

A) Low gas pressure

B) Dirty or partially clogged

ODS/pilot

7. Thermocouple damaged

8. Control valve damaged

1. Burner oriﬁce is clogged

2. Inlet gas pressure is too low

1. Manifold pressure is too low

2. Burner oriﬁce is clogged

1. Burner oriﬁce is clogged or

damaged

2. Burner damaged

3. Gas regulator defective

1. Not enough air

2. Gas regulator defective

3. Clogged or dirty burner

1. Residues from manufacturing

processes

OBSERVED PROBLEM

ODS/pilot lights but flame

goes out when control knob is

released

Burner does not light after ODS/

pilot is lit

Delayed ignition of burner

Burner backﬁring during

combustion

Yellow ﬂame during burner

combustion

Slight smoke or odor during initial

operation

REMEDY

1. Press in control knob fully

2. After ODS/pilot lights, keep con-

trol knob pressed in 30 seconds

3. Wait one minute for safety in-

terlock system to reset. Repeat

ignition operation

4. Fully open equipment shutoff

valve

5. Hand tighten until snug, then

tighten 1/4 turn more

6. A) Contact local natural or

propane/LP gas company

B) Clean ODS/pilot (see

Cleaning and Maintenance

page 16) or replace ODS/pilot

assembly

7. Replace pilot assembly

8. Replace control valve

1. Clean burner (see

Cleaning

and Maintenance

, page 16) or

replace burner oriﬁce

2. Contact local natural or pro-

pane/LP gas company

1. Contact local natural or pro-

pane/LP gas company

2. Clean burner (see

Cleaning

and Maintenance

, page 16) or

replace burner oriﬁce

1. Clean burner (see

Cleaning

and Maintenance

, page 16) or

replace burner oriﬁce

2. Replace burner

3. Replace gas regulator

1. Check burner for dirt and

debris. If found, clean burner

(see

Cleaning and Mainte-

nance

, page 16)

2. Replace gas regulator

3. Clean burner (see

Cleaning

and Maintenance

, page 16)

1. Problem will stop after a few

hours of operation

TROUBLESHOOTING

Continued

Содержание VP20BT

Страница 1: ...other appliance 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 ph...

Страница 2: ...ng plate This appliance is not convert ible for use with other gases Aftermarket Completion of sale not for purpose of resale from the manufacturer TABLE OF CONTENTS Safety Information 3 Local Codes 4...

Страница 3: ...o high temperatures the appliance should be located out oftraf candawayfromfurniture and draperies Do not place clothing or other ammable material on or near the appliance Never place any objects on t...

Страница 4: ...o cal codes In the absence of local codes use the latest edition of National Fuel Gas Code ANSI Z223 1 NFPA 54 Available from American National Standards Institute Inc 1430 Broadway New York NY 10018...

Страница 5: ...e air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusual...

Страница 6: ...rect vent draws combustion air from the outdoors and vents to the outdoors Example Gas water heater ______________ Btu Hr Vent free heater _____________ Btu Hr Total _____________ Btu Hr 40 000 20 00...

Страница 7: ...t air into attic if attic has a thermostat controlled power vent Heated air entering the attic will activate the power vent Figure 3 Ventilation Air from Outdoors Figure 2 Ventilation Air from Inside...

Страница 8: ...es of the heater as a replace insert in high traf c areas in windy or drafty areas CAUTION This heater cre ates warm air currents These currents move heat to wall sur faces next to heater Installing h...

Страница 9: ...Attaching to Wall Stud This method provides the strongest hold Insert mounting screws through mounting bracket and into wall studs Attaching to WallAnchor This method allows you to attach mounting bra...

Страница 10: ...r ush to wall 4 For thin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings see Figure 10 IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls...

Страница 11: ...3 For carpeted oors make a small cut with a sharp knife at marked locations prior to drill ing If mounting base to a wood oor drill 1 8 inch diameter hole 3 4 inch deep Do not use anchors in wood oor...

Страница 12: ...in Figure 15 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 the...

Страница 13: ...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 compressed air 3 Check all joints from gas meter for n...

Страница 14: ...de Pilot Burner Thermocouple OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING If you do not fol low these instructions exactly a re or explosion may result causing property damage per son...

Страница 15: ...lbetween1 and 5 Selecting the 5 setting will cause the burner to remain fully on without modulating down in most cases Note The thermostat sensing bulb measures the temperature of air near the heater...

Страница 16: ...e of dust and dirt To clean these parts we recommend using compressed air no greater than 30 PSI Your local computer store hardware store or home center may carry compressed air in a can You can use a...

Страница 17: ...25 x 7 24 25 x 25 75 x 7 Carton 26 25 x 21 25 x 9 26 25 x 29 x 9 Weight pounds Heater 20 28 Shipping 25 33 SERVICE HINTS When Gas Pressure Is Too Low pilot will not stay lit burner will have delayed i...

Страница 18: ...on 4 Air in gas lines when in stalled 5 Depleted gas supply propane LP gas only 6 ODS pilot is clogged 7 Gas regulator setting is not correct OBSERVED PROBLEM When ignitor button is pressed there is n...

Страница 19: ...Burner back ring during combustion Yellow ame during burner combustion Slightsmokeorodorduringinitial operation REMEDY 1 Press in control knob fully 2 AfterODS pilotlights keepcon trol knob pressed in...

Страница 20: ...ly propane LP gas only 3 Gas leak See Warning statement above 1 Not enough fresh air is available 2 Low line pressure 3 ODS pilot is partially clogged OBSERVED PROBLEM Heaterproducesawhistlingnoise wh...

Страница 21: ...0 When calling DESA Heating Products have ready your name your address model and serial numbers of your heater how heater was malfunctioning type of gas used propane LP or natural gas purchase date Us...

Страница 22: ...www desatech com 107886 01J 22 ILLUSTRATED PARTS BREAKDOWN MODELS VN20BT VP20BT VN30BT VP30BT 2 3 5 6 8 9 10 10 11 12 13 14 16 18 19 4 7 1 15 17 20...

Страница 23: ...01 Nut M5 2 11 110803 01 110803 02 110803 01 110803 02 ODS Pilot Assembly 1 110186 01 110186 01 110186 01 110186 01 Thermocouple Kit 1 12 103446 01 103446 01 103447 01 103447 01 Burner 1 13 099387 03...

Страница 24: ...intenance 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 of...

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