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105070

FIREPLACE MANUFACTURERS INCORPORATED
UNVENTED NATURAL GAS LOG HEATER

OBSERVED PROBLEM

One or both burners do not light after ODS/
pilot is lit

Delayed ignition of one or both burners

Burner backfiring during combustion

Yellow flame in front burner during burner
combustion

Slight smoke or odor during initial operation

Heater produces a whistling noise when
burners are lit

Moisture/condensation noticed on windows

White powder residue forming within burner
box or on adjacent walls or furniture

REMEDY

1. Contact local natural gas company
2. Clean burner(s) (see Cleaning and

Maintenance, page 16) or replace burner
orifice(s)

3. Contact qualified service person
4. Replace burner orifice(s)

1. Contact local natural gas company
2. Clean burner(s) (see Cleaning and

Maintenance, page 16) or replace burner
orifice(s)

3. Contact qualified service person

1. Clean burner (see Cleaning and Main-

tenance, page 16) or replace burner
orifice

2. Replace damaged burner
3. Replace gas regulator

1. Check burner(s) for dirt and debris. If

found, clean burner(s) (see Cleaning and
Maintenance, page 16)

2. Replace gas regulator

1. Problem will stop after a few hours of

operation

1. Turn control knob to LO position and

let warm up for a minute

2. Operate burners until air is removed

from line. Have gas line checked by lo-
cal natural gas company

3. Observe minimum installation clear-

ances (see pages 7 through 9)

4. Clean burners (see Cleaning and Main-

tenance, page 16) or replace burner
orifice(s)

1. Refer to Air for Combustion and Venti-

lation requirements (page 4)

1. Turn heater off when using furniture

polish, wax, carpet cleaners, or similar
products

TROUBLESHOOTING

Continued

POSSIBLE CAUSE

1. Inlet gas pressure is too low
2. Burner orifice(s) clogged

3. Mislocated crossover tube
4. Burner orifice(s) diameter is too small

1. Manifold pressure is too low
2. Burner orifice(s) clogged

3. Mislocated crossover tube

1. Burner orifice is clogged or damaged

2. Damaged burner
3. Gas regulator defective

1. Not enough air

2. Gas regulator defective

1. Residues from manufacturing processes

and logs curing

1. Turning control knob to HI position

when burners are cold

2. Air in gas line

3. Air passageways on heater blocked

4. Dirty or partially clogged burner

orifice(s)

1. Not enough combustion/ventilation air

1. When heated, vapors from furniture pol-

ish, wax, carpet cleaners, etc. turn into
white powder residue

www.desatech.com

Содержание VFN18MV

Страница 1: ...tallation and operational pro cedures For assistance or additional informationconsultaqualifiedinstaller service agency or the gas supplier VFN18MV VFN24MV VFN30MV Variable Manually Controlled LO PILOT OFF HI EMBER MASTER WARNING This is an unvented gas fired heater It uses air oxygen from the room in which it is installed Provisions for adequate combustion and ventilation air must be provided Ref...

Страница 2: ...you must open the vents before operating heater 6 This log heater is designed to be smoke less If logs ever appear to smoke turn off heater and call a qualified service person Note During initial operation slight smoking may occur due to log curing and heater burning manufactur ing residues 7 To prevent the creation of soot follow the instructions in Cleaning and Main tenance page 16 8 Before usin...

Страница 3: ...FETY DEVICE This heater has a pilot with an Oxygen Depletion Sensing ODS safety shutoff system The ODS pilot is a required feature for vent free room heaters The ODS pilot shuts off the heater if there is not enough fresh air PIEZO IGNITION SYSTEM This heater has a piezo ignitor This system requires no matches batteries or other sources to light heater 1 Remove logs and heater base assem bly from ...

Страница 4: ...uate fresh air for these appliances This will insure proper venting of vented fuel burning appliances WARNING This heater shall notbeinstalledinaconfinedspace or unusually tight construction unless provisions are provided foradequatecombustionandven tilation air Read the following in structions to insure proper fresh air for this and other fuel burning appliances in your home PROVIDING ADEQUATE VE...

Страница 5: ...ion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used _________________ Btu Hr maximum the space can support _________________ Btu Hr actual amount of Btu Hr used Example 51 200 Btu Hr maximum the space can support 73 000 Btu Hr actual amount of Btu Hr used The space in the above example is a confinedspace becau...

Страница 6: ...nings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors orspacesopentotheoutdoors Thesespaces include attics and crawl spaces Follow the National Fuel Gas Code NFPA 54 ANS Z223 1 Section5 3 AirforCombustionand Ventilation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if at...

Страница 7: ...nt freeheatersaddmois ture to the air Although this is beneficial installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture See Air for Com bustion and Ventilation pages 4 through 6 CHECK GAS TYPE Useonlynaturalgas Ifyourgassupplyisnot natural donotinstallheater Calldealerwhere you bought heater for proper type heater NOTICE Stateorlocalcodesmay only...

Страница 8: ... install the fireplace hood accessory 24 models only See Figure 5 for minimum clearances IMPORTANT If you cannot meet these minimum clearances you must operate heater with chimney flue damper open Go to Installing Damper Clamp Accessory for Vented Operation page 10 NOTICE Manual control heaters maybeusedasaventedproduct If so you must always run heater with chimney flue damper open If running heat...

Страница 9: ... not meet the clear ances listed below you will need a hood Determining Minimum Mantel Clearance If you meet minimum clearance between mantel shelf and top of fireplace opening a hood is not required see Figure 6 Continued Minimum Non Combustible Material 8 Min 12 15 18 All minimum distances are in inches Log Sets 18 24 Models 20 2 1 2 6 8 10 12 Distances to Underside of Mantel Hood HDABK HDABR To...

Страница 10: ...ireplace mark screw lo cations in mortar joint of bricks 8 Remove heater base from fireplace Remove mounting brackets from heater base 9 Drill holes at marked locations using 3 16 drill bit INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION Note When used as a vented heater appli ance must be installed only in a solid fuel burning fireplace with a working flue and constructed of noncombustible...

Страница 11: ...st gauge connection CAUTION Use only new black iron or steel pipe Inter nally tinned copper tubing may be used in certain areas Check your local codes Use pipe of 1 2 diameter or greater to allow proper gas volume to heater If pipe is too small undue loss of pressure will occur Installation must include an equipment shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test g...

Страница 12: ...d equipment shutoff valve to gas supply Check re connected fittings for leaks INSTALLATION Continued Figure 14 Equipment Shutoff Valve ON POSITION OFF POSITION Open Closed Equipment Shutoff Valve Figure 15 Checking Gas Joints Gas Meter Equipment Shutoff Valve Control Valve Location Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa 1 Close equipment shutoff valve see Fig ure 14 2 Pressurize sup...

Страница 13: ...ward next to the metal posts The pegs on the log must be on top see Figure 17 3 Slide the grooves in the back of the rear log 3 against the rear grate prongs Make sure the peg on the log is on top see Figure 18 4 Place the top middle log 4 on the bottom middle log 2 Make sue the pegs of the bottom middle log fit se curely in the holes of the top middle log see Figure 19 5 Place the crossover log 5...

Страница 14: ...n air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric 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 sup plier call the fire department C Use only your hand to push in or turn the gas control knob Never use...

Страница 15: ...URNER FLAME PATTERN Figure 25 shows correct front burner flame pattern Figure 26 shows incorrect front burner flame pattern The incorrect burner flame pattern shows yellow tipping at top of blue flame Figure 26 Incorrect Front Burner Flame Pattern Figure 25 Correct Front Burner Flame Pattern Yellow Tipping At Top of Blue Flame WARNING If yellow tipping occurs your heater could pro duce increased l...

Страница 16: ...Tocleanthesepartswerecom mend using compressed air no greater than 30 PSI Your local computer store hard ware store or home center may carry com pressed air in a can You can use a vacuum cleaner in the blow position If using com pressed air in a can please follow the direc tions on the can If you don t follow direc tionsonthecan youcoulddamagethepilot assembly 1 Shut off the unit including the pil...

Страница 17: ...ermocouple damaged 8 Control valve damaged REMEDY 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 3 Tighten nut holding piezo ignitor to base panel of log set Nut is located behind base panel 4 Replace ignitor cable 5 Replace piezo ignitor 6 Replace ignitor 7 Replace ignitor 1 Turn on gas supply or open equipment shutoff valve 2 Turn control ...

Страница 18: ...gulator 1 Problem will stop after a few hours of operation 1 Turn control knob to LO position and let warm up for a minute 2 Operate burners until air is removed from line Have gas line checked by lo cal natural gas company 3 Observe minimum installation clear ances see pages 7 through 9 4 Clean burners see Cleaning and Main tenance page 16 or replace burner orifice s 1 Refer to Air for Combustion...

Страница 19: ... air is available 2 Low 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 statement at top of page OBSERVED PROBLEM Heater produces a clicking ticking noise just after burners are lit or shut off Heater produces unwanted odors Heater shuts off in use ODS ope...

Страница 20: ...ORPORATED UNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS BREAKDOWN VARIABLE MANUALLY CONTROLLED MODELS VFN18MV VFN24MV VFN30MV 17 19 18 25 24 20 20 26 27 28 6 7 27 27 24 9 8 10 11 12 14 21 22 26 1 26 2 23 6 1 6 2 13 15 16 4 5 3 2 1R 1L ...

Страница 21: ...Gas Regulator 1 12 M11084 38 M11084 38 M11084 38 Screw 2 13 101011 01 101011 02 101011 03 Inlet Tube 1 14 098354 01 098354 01 098354 01 Control Knob 1 15 098462 03 098462 03 098462 03 Control Rod 1 16 098325 01 098325 01 098325 01 Roll Pin 1 17 098508 01 098508 01 098508 01 Valve Retainer Nut 1 18 102568 01 102568 01 102568 01 Gas Valve 1 19 101005 01 101005 01 101005 01 Valve Bracket 1 20 M11084 ...

Страница 22: ...your local dealer If they can not supply these accessories call Fireplace Manufacturers Incorporated s Parts Department at 1 800 888 2050 for referral information You can also write to the address listed on the back page of this manual FIREPLACE HOOD Black HDABK Part No 01244 Brass HDABR Part No 01245 For all models Helps deflect heat away from mantel or wall above fireplace Fits openings 28 to 48...

Страница 23: ...___________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ____________________________________________________________________________________________...

Страница 24: ...iring a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTA BILITY AND FITNESS FOR A PARTICULAR PURPOSE TO ONE 1 YEAR ON ALL COMPONENTS FR...

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