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Shown with optional
cabinet mantel, hearth
base, and trim
accessories.

Save this manual for future reference.

®

WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.

— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any 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.

• Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s in-
structions.

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

department.

— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.

WARNING: Improper installation,
adjustment, alteration, service,
or maintenance can cause injury
or property damage. Refer to this
manual for correct installation
and operational procedures. For
assistance or additional infor-
mation consult a qualified in-
staller, service agency, or the
gas supplier.

WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided. Refer to 

Air for

Combustion and Ventilation sec-
tion in this manual.

This appliance may be installed in an aftermarket* manufactured (mobile) home,

where not prohibited by state or local codes.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

OWNER’S OPERATION AND INSTALLATION MANUAL

DESA INTERNATIONAL

UNVENTED (VENT-FREE)

PROPANE/LP GAS FIREPLACE

Variable

Manually-

Controlled

Models and

Thermostatically-

Controlled

“B” Models

with

Split Oak Logs

Summary of Contents for VSGF28NTB

Page 1: ...ce must be performed by a quali fied installer service agency or the gas supplier WARNING Improperinstallation adjustment alteration service or maintenance can cause injury orpropertydamage Refertothis manual for correct installation and operational procedures For assistance or additional infor mation consult a qualified in staller service agency or the gas supplier WARNING This is an unvented gas...

Page 2: ... gas The odor helps you detect a gas leak However the odor added to the gas can fade Gas may be present even though no odor exists Make certain you read and understand all Warnings Keep this manual for reference It is your guide to safe and proper operation of this fireplace Safety Information continues on next page Safety Information 2 Product Identification 4 Local Codes 5 Unpacking 5 Product Fe...

Page 3: ...acturing residues 10 Do not allow fans to blow directly into the fireplace Avoid any drafts that alter burner flame patterns Ceiling fans can create drafts that alter burner flame patterns Altered burner patterns can cause sooting 11 Do not use a blower insert heat exchanger insert or other accessory not approved for use with this heater 12 This fireplace needs fresh air ventilation to run properl...

Page 4: ... Branch Rear Log Base Assembly Front Burner Rear Burner Crossover Log Top Middle Log Bottom Middle Log Right Front Branch Figure 2 Fireplace Top Louver Assembly Firebox Hood Bottom Louver Assembly Screen Assembly Top Outer Casing Firebox Support Blower Assembly Thermostat Models only ...

Page 5: ...ty making it ideal for emergency back up heat Safety Device This fireplace has a pilot with an Oxygen Depletion Sensor Shutoff System ODS The ODS pilot is a required feature for vent free room heaters The ODS system shuts off the fireplace if there is not enough fresh air Piezo Ignition System This fireplace has a piezo ignitor This system requires no matches batteries or other sources to light fi...

Page 6: ...all appliances installed in that space Rooms communicating directly with the space in which the appliances are installed through openings not furnished 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 PROVIDING ADEQUATE VENTILATION The following is exerpts from National Fuel Gas Code...

Page 7: ...ter ___________________ Btu Hr Gas fireplace logs ___________________ Btu Hr Other gas appliances ___________________ Btu Hr Total ___________________ Btu Hr Example Gas water heater 40 000 Btu Hr Vent free fireplace 28 000 Btu Hr Total 68 000 Btu Hr Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr t...

Page 8: ... G 001 WARNING Rework worksheet adding the space of the adjoining unconfined space The com bined spaces must have enough fresh air to supply all appliances in both spaces Figure 4 Ventilation Air from Outdoors Ventilation Air From Outdoors 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...

Page 9: ...wer cord INSTALLING HOOD Install hood to top of fireboxas shown in Figure 5 Use 3 Phillips screws provided Figure 5 Installing Hood to Firebox NOTICE A qualified service person must install fireplace Follow all local codes WARNING ICON G 001 WARNING Never install the fireplace in a bedroom or bathroom in a recreational vehicle where curtains furniture clothing or other flammable objects are less t...

Page 10: ...im see Figure 6 5 Slide other end of adjusting plate shim in slot on mitered edge of side brass trim see Figure 6 6 While firmly holding edges of brass trim together tighten both set screws on the adjusting plate with slotted screwdriver 7 Repeat steps 1 through 6 for other side Side Brass Trim Top Brass Trim Slot Mitered Edge Slot Shim Set Screws Adjusting Plate Figure 6 Assembling Brass Trim 8 T...

Page 11: ...ases CONVENTIONAL FIREPLACE INSTALLATION Conventional installation of this fireplace involves installing fireplace along with the corner face or cabinet mantel with hearth base accessories against a wall in your home Follow the instructions below to install the fireplace in this manner Figure 8 Minimum Clearance to Wall and Ceiling QQQQQ QQQQQ QQQQQ QQQQQ QQQQQ 42 16 Face or Cabinet Mantel Corner ...

Page 12: ...to fireplace see Figure 9 Make sure to locate access hole so cabinet mantel will cover it when installed Note You can secure base to floor using wood screws Countersink screw heads and putty over Figure 9 Placing Hearth Base Accessory Against Wall 5 Route flexible gas line through access hole in hearth base 6 Center cabinet mantel on hearth base see Figure 10 Make sure mantel is flush against wall...

Page 13: ... of base Tighten wood screws through these holes and into hearth or floor 12 Check all gas connections for leaks See Checking Gas Connections page 18 Continued Figure 12 Inserting Fireplace Into Cabinet Mantel QQQQQ QQQQQ QQQ QQQ QQQ QQQ QQQ 1 Frame in rough opening Use dimensions shown in Figure 13 for the rough opening 35 1 2 17 3 4 33 Figure 13 Rough Opening for Installing in Wall BUILT IN FIRE...

Page 14: ...le gas line if allowed by local codes after the manual shutoff valve The flexible gas line must be the last item installed on the gas piping See Installing Gas Piping to Fireplace Location page 16 4 Carefully set fireplace in front of rough opening with back of fireplace inside wall opening 5 Attach flexible gas line to gas supply See Connecting Fireplace to Gas Supply page 17 6 Plug electrical co...

Page 15: ...ed Before installing fireplace make sure you have the items listed below piping check local codes sealant resistant to LP propane gas manual shutoff valve test gauge connection sediment trap tee joint pipe wrench approved flexible gas line with gas connector if allowed by local codes not provided NOTICE A qualified service person must connect fireplace to gas supply Follow all local codes An A G A...

Page 16: ...G ICON G 001 CAUTION Use pipe joint sealant that is resistant to liquid petroleum LP gas Install sediment trap in supply line as shown in Figure 18 page 17 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 fireplace gas controls If sediment trap...

Page 17: ...driver Phillips screwdriver sealant resistant to propane LP gas not provided 1 Remove fireplace screen Remove two screws that hold fireplace screen in place for ship ping These screws are located near top of screen Discard screws Lift fireplace screen up and pull out to remove 2 Remove screws that attach log base assembly to fireplace see Figure 19 Carefully lift up log base assembly and remove fr...

Page 18: ...ng Correct all leaks at once WARNING ICON G 001 WARNING Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once Figure 20 Attaching Flexible Gas Lines Together 4 Attach a 45 flare union gas connector to flexible gas line from gas supply see Figure 20 Connect flare union to flexible gas line attached to...

Page 19: ...osition 4 Check all joints from manual shutoff valve to thermostat gas valve see Figure 22 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light fireplace see Operating Fireplace pages 22 and 23 Thermostat controlled models or pages 24 and 25 Manually controlled models Check all other internal joints for leaks 7 Turn off fireplace see ...

Page 20: ... bar Note 18 model has only one front log 2 Rest bottom middle log 2 behind metal posts on front burner Make sure the grooves in the bottom of the log fit over the grate Bring the log forward next to the metal posts The pegs on the log must be on top see Figure 24 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 25 4 ...

Page 21: ...iddle log see Figure 27 Figure 27 Installing Crossover Log 5 Crossover Log 4 Hole Peg Cutout 5 Install fireplace screen by slipping notches of fireplace screen over screws on front of fireplace see Figure 28 Notches Screws for Mounting Screen Figure 28 Installing Fireplace Screen WARNING ICON G 001 WARNING You must operate this fireplace with the fireplace screen in place Make sure fireplace scree...

Page 22: ... phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department C Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician or gas supplier Force or attempted repair may result in a fire or explosion D Do not use this appliance if any...

Page 23: ...knob to any heat level between HI and LO CAUTION Do not try to adjust heating levels by using the manual shutoff valve TO TURN OFF GAS TO APPLIANCE Shutting Off Fireplace Turn control knob clockwise Clockwise to the OFF position Shutting Off Burners Only pilot stays lit Turn control knob clockwise Clockwise to the PILOT position THERMOSTAT CONTROL OPERATION You can set the thermostat control knob ...

Page 24: ... gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department C Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician or gas supplier Force or attempted repair may result in a fire or explosion D D...

Page 25: ...ions WARNING ICON G 001 CAUTION Do not try to adjust heating levels by using the manual shutoff valve VARIABLE CONTROL OPERATION The variable control valve can be set to any heat setting and flame height desired by simply turning the control knob until that setting is attained Even the lowest setting provides realistic flames and glowing embers from two burners Selecting higher settings produces g...

Page 26: ...ower will not operate In the AUTO position the blower will start when the thermostat senses a suffi cient increase in firebox temperature Note Your gas logs and thermostat blower will not turn on and off at the same time The fireplace may run for several minutes before the blower turns on After the heater modu lates to the pilot position the blower will continue to run The blower will shut off aft...

Page 27: ...ner is normal NOTICE Do not mistake orange flames with yellow tipping Dirt or other fine particles are burned by fireplace causing brief patches of orange flame INSPECTING BURNERS Continued If front burner flame pattern is incorrect as shown in Figure 36 turn fireplace off see To Turn Off Gas to Appliance page 23 Thermostat controlled models or page 25 Manually controlled models see Troubleshootin...

Page 28: ...ot WARNING ICON G 001 CAUTION You must keep control areas burners and circulating air passageways of fireplace clean Inspect these areas of fireplace before each use Have fireplace inspected yearly by a qualified service person Fireplace may need more frequent cleaning due to excessive lint from carpeting bedding material etc ODS PILOT AND BURNERS Use a vacuum cleaner or small soft bristled brush ...

Page 29: ...le in PILOT position 4 Air in gas lines when installed 5 ODS pilot is clogged 6 Gas regulator setting is not correct 1 Control knob not fully pressed in 2 Control knob not pressed in long enough 3 Manual shutoff valve not fully open 4 Thermocouple connection loose at control valve 5 Pilot flame not touching thermocouple which allows thermocouple to cool causing pilot flame to go out This problem c...

Page 30: ...lace 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 local propane gas company 3 Observe minimum installation clearances see page 11 4 Clean burners see Cleaning and Maintenance page 28 or replace burner orifice s 1 Refer to Air for Combustion a...

Page 31: ...y clogged 1 Gas leak See Warning statement above 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement above 1 Not enough combustion ventilation air OBSERVED PROBLEM Fireplace produces a clicking ticking noise just after burners are lit or shut off Fireplace produces unwanted odors Fireplace shuts off in use ODS operates Gas odor even when con...

Page 32: ...s 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 1 800 DESA LOG 1 800 337 2564 When calling DESA International have ready your name your address model number of your fireplace how fireplace was malfunc...

Page 33: ...odel 122 lbs Manual Model Figure 37 Blower Wiring Diagram for Thermostat Controlled Models SPECIFICATIONS WIRING DIAGRAM CAUTION Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing Blue Fan Switch Off On Auto Red Fan Switch N O Green White On 110 115 V A C Blower Motor Black Off 1 2 3 Auto ...

Page 34: ...QQQ QQQQQQ QQQQQQ QQQQQQ QQQQQQ QQQQQQ QQQ QQQ QQQ QQQQQQQQQQ QQQQQQQQQQ QQQQQQQQQQ CABINET MANTEL GM100F Series Walnut Finished GM101U Series Unfinished GM106F Series Oak Finished with Medium Stain GM1007U Series Unfinished Shown with optional base and laminate hearth and mantel trim accessories Dimensions WxHxD 56 3 4 x 48 3 4 x 20 5 8 FACE MANTEL GM400F Series Walnut Finished GM401U Series Unfi...

Page 35: ...m G3003J Series Jade Marble Laminate Hearth Base Trim G3002S Series Sandstone Marble Laminate Mantel Trim G3003S Series Sandstone Marble Laminate Hearth Base Trim G3002B Series Black Onyx Marble Laminate Trim G3003B Series Black Onyx Marble Laminate Hearth Base Trim Mantel trim for cabinet face or corner mantel Hearth base trim for hardwood hearth bases Hearth Base Trim Mantel Trim FIREBOX BRICK L...

Page 36: ...15 ILLUSTRATED PARTS BREAKDOWN Log Base Assembly Variable Manually Controlled Models VSGF28PV 27 8 9 8 8 19 13 12 8 6 7 7 1 7 2 10 18 23 16 11 26 14 6 6 6 6 21 15 19 32 29 24 30 20 28 31 25 17 22 4 5 3 2 1L 1R ...

Page 37: ...0999 02 Rear Burner Assembly 1 12 102257 08CJ Base Assembly 1 13 098271 06 Ignitor Cable 1 14 103410 01CK Firebox Bottom 1 15 098867 10 Gas Regulator 1 16 101004 01 Front Burner Injector 1 17 102445 01 Piezo Ignitor 1 18 101007 01 Crossover Tube 1 19 099387 05 Pilot Tube 1 20 101972 01 Valve and Piezo Bracket 1 21 M11084 38 Regulator Hex Screw 2 22 102668 01 Front Burner Tube 1 23 101008 01 Gasket...

Page 38: ...15 ILLUSTRATED PARTS BREAKDOWN Log Base Assembly Thermostat Controlled Models VSGF28PTB CSGF28PTB 18 6 27 8 9 8 8 19 13 12 7 7 1 7 2 10 16 11 26 14 29 6 6 6 6 22 25 23 19 24 13 7 2 20 15 28 21 17 4 5 3 2 1L 1R ...

Page 39: ...Pilot Bracket 1 10 101330 02 Front Burner Assembly 1 11 100999 02 Rear Burner Assembly 1 12 102257 08CJ Base Assembly 1 13 098271 06 Ignitor Cable 1 14 103410 01CK Firebox Bottom 1 15 098867 10 Gas Regulator 1 16 101004 04 Front Burner Injector 1 17 102845 01 Inlet Tube 1 18 101382 01 Thermovalve Bracket 1 19 099387 03 Pilot Tube 1 20 102846 01 Burner Tube 1 21 097809 02 Adapter 1 22 099211 01 Scr...

Page 40: ...40 103415 ILLUSTRATED PARTS BREAKDOWN Fireplace 1 2 3 4 6 12 18 19 10 7 13 22 20 23 16 24 24 21 16 16 7 17 14 5 16 16 15 8 9 11 11 11 VSGF28PTB CSGF28PTB ...

Page 41: ...e Front 1 9 101712 02 Firebox Hood 1 10 101348 01 Firebox Support 2 11 099230 01 Shoulder Screw 4 12 101872 03 Firebox Top 1 13 103208 01 Outer Base 1 14 101838 03CJ Firebox Wrapper 1 15 101614 02 Limit Switch thermal disk Assy 1 16 M11084 26 Hex Screw 10 55 17 098304 03 Phillips Pan Head Screw 8 4 18 101727 03 Screen Assembly 1 19 101398 02 Wire Harness 1 20 099998 01 Fan Switch 1 21 103581 01 Bl...

Page 42: ...42 103415 ILLUSTRATED PARTS BREAKDOWN Fireplace 1 2 3 4 6 12 18 10 7 13 16 16 16 7 17 14 5 16 16 15 8 9 11 11 11 VSGF28PV ...

Page 43: ...hillips Pan Head Screw 10 9 6 101351 01CK Top Front 1 7 102455 01 Top Louver Assembly 2 8 101353 01CK Middle Front 1 9 101712 02 Firebox Hood 1 10 101348 01 Firebox Support 2 11 099230 01 Shoulder Screw 4 12 101872 03 Firebox Top 1 13 103208 01 Outer Base 1 14 101838 03CJ Firebox Wrapper 1 15 101514 01CJ Cover 1 16 M11084 26 Hex Screw 10 55 17 098304 03 Phillips Pan Head Screw 8 4 18 101727 03 Scr...

Page 44: ...nd all such other costs related to repairing a defective heater will be the responsibility of the owner TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO THREE 3 Y...

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