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110398-01A

For more information, visit www.desatech.com

For more information, visit www.desatech.com

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WIRING DIAGRAM

SPECIFICATIONS

TECHNICAL SERVICE

REPLACEMENT PARTS

SPECIFICATIONS

Natural Gas

Propane/LP

Btu (Variable)

20,000/39,000

20,000/39,000

Type Gas

Natural Gas Only Propane/LP Only

Ignition

Piezo

Piezo

Pressure Manifold

3.5" W.C.

8.0" W.C.

Inlet Gas Pressure (in. of water)

Maximum

10.5"

14"

Minimum*

5"

11"

Shipping Weight

32 lbs.

32 lbs.

* For input adjustment

SERVICE HINTS

When Gas Pressure Is Too Low

• pilot will not stay lit

• burners will have delayed ignition

• heater will not produce specified heat

• propane/LP gas supply may be low

You may feel your gas pressure is too low. If so, contact your local
natural or propane/LP gas supplier.

TECHNICAL SERVICE

You may have further questions about installation, operation, or
troubleshooting. If so, contact DESA International’s Technical
Service Department at 1-866-672-6040. When calling please have
your model and serial numbers of your heater ready.

You can also visit DESA International’s technical services web site
at 

www.desatech.com.

WIRING DIAGRAM

Note:

 For proper operation of optional accessories, the wires from

the switch to the control must be connected exactly as shown.

AUT

O

OF

F

ON

Thermopile

REPLACEMENT PARTS

Note:

 Use only original replacement parts. This will protect your

warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply
original replacement part(s), call DESA International’s Technical
Service Department at 1-866-672-6040. When calling DESA Inter-
national, have ready

• your name and address

• model and serial numbers of your heater

• how heater was malfunctioning

• type of gas used (propane/LP or natural gas)

• purchase date

Usually, we will ask you to return the part to the factory.

PARTS NOT UNDER
WARRANTY

Contact authorized dealers of this product. If they can’t supply original
replacement part(s), call DESA International at 1-866-672-6040 for
referral information. When calling DESA International, have ready

• model number of your heater

• the replacement part number

Summary of Contents for VYM27NR/PR

Page 1: ...n consult a qualified installer service agency or the gas supplier WARNING Thisapplianceisforinstalla tiononlyinasolid fuelburningmasonry or UL127 factory built fireplace or in an approved ventless fi...

Page 2: ...or service this fireplace Improper use of this fireplace can cause serious injury or death from burns fire explosions electrical shock and carbon monoxide poisoning WARNINGS DANGER Carbon monoxide po...

Page 3: ...ons in Clean ing and Maintenance page 17 10 Before using furniture polish wax carpet cleaner or similar products turn heater off If heated the vapors from these prod ucts may create a white powder res...

Page 4: ...tiple openings You may also install this log heater in a standard firebox REMOTE CONTROL ACCESSORIES There are four optional remote controls that can be purchased separately for this log heater wall s...

Page 5: ...nished with doors are considered a part of the unconfined space Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them AIR FOR COMBUSTION AND VENTI...

Page 6: ...within 12 of the ceiling and one within 12 of the floor on the wall connecting the two spaces see options 1 and 2 Figure 2 You can also remove door into adjoining room see option 3 Figure 2 Follow th...

Page 7: ...to vinyl or cloth wall coveringsoroperatingheaterwhereimpurities such as but not limited to tobacco smoke aromatic candles cleaning fluids oil or kerosene lamps etc in the air exist may discolor wall...

Page 8: ...with damper open noncombustible material above fire place opening is not needed Go to Installing Damper Clamp Accessory for Vented Operation page 10 Figure 5 Heat Resistant Material Slate Marble Tile...

Page 9: ...ening Underside of Mantel Shelf Mantel Shelf 12 A 18 20 22 24 All minimum distances are in inches 2 1 2 6 8 10 Minimum Non Combustible Material 8 Min 12 15 18 All minimum distances are in inches 20 2...

Page 10: ...HEATER BASE ASSEMBLY WARNING Ifinstallinginasunkenfireplace special care is needed You must raise the fireplace floor to allow access to heater control panel This will insure adequate air flow and gu...

Page 11: ...commonly known as wellhead gas INSTALLATION Installing Heater Base Assembly Cont Connecting To Gas Supply A CSA design certified equipment shutoff valve with 1 8 NPT tap is an acceptable alternative...

Page 12: ...cess 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...

Page 13: ...2 on grate to fit as illus trated in Figure 18 2 Place center insert log 3 as illustrated in Figure 19 3 Place top left log 4 and top right log 5 as illustrated in Figure 20 4 Make sure open areas of...

Page 14: ...ntheventsbefore operating heater Youmustoperatethisheaterwithafireplacescreen in place Make sure fireplace screen is closed before running heater NOTICE Duringinitialoperationofnewheater burning logsw...

Page 15: ...OFF position MANUAL LIGHTING PROCEDURE Note All remote control accessories must be purchased sepa rately see Accessories page 24 Follow instructions included with the remote control Thermostat Control...

Page 16: ...Held Remote Control Unit Selections GHRCTA only Figure 25 Setting the Selector Switch Control Knob and Flame Adjustment Knob for Remote Operation Selector Switch in Remote Position Optional Remote Co...

Page 17: ...nd 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 vacuum cleaner in the blow position If using comp...

Page 18: ...d 7 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 Nu...

Page 19: ...o Air for Combustion and Venti lation requirements page 4 1 Turn control knob to LO position and let warm up for a minute 2 Operate burner until air is removed from line Have gas line checked by local...

Page 20: ...disappear over time REMEDY 1 This is common with most heaters If noise is excessive contact qualified ser vice person 1 Open window and ventilate room Stop using odor causing products while heater is...

Page 21: ...model and serial numbers of your heater ready You can also visit DESA International s technical services web site at www desatech com WIRING DIAGRAM Note For proper operation of optional accessories t...

Page 22: ...T O N H I L O O F F P I L O T O N H I L O 1 3 1 1 1 5 1 4 1 2 9 3 2 13 12 15 14 18 17 12 12 16 21 12 19 6 8 7 4 11 12 20 10 9 23 22 ILLUSTRATED PARTS BREAKDOWN VYM27NR VYM27PR FVFM27NR FVFM27PR NOTE...

Page 23: ...urner Clip 1 7 099056 16 099056 17 Burner Orifice Injector 1 8 104591 01 104591 01 Burner 1 9 100609 01 099387 13 Pilot Tube Regulator to Pilot 1 10 103781 01 103781 02 Gas Control Valve 1 11 104611 0...

Page 24: ...Shown For all models The desired comfort setting can be selected on the wall thermostat and the log heater will automatically cycle from pilot to the heat setting selected WALL MOUNT ON OFF SWITCH GWM...

Page 25: ...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 26: ...110398 01A For more information visit www desatech com For more information visit www desatech com 26 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 Postage Required TM TAPE TAPE...

Page 27: ...________________________________________________________ _______________________________________________________________________________________________ _______________________________________________...

Page 28: ...be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of no...

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