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114926-01B

6

CHECK GAS TYPE

Use the correct gas type (natural or propane/LP) for 

your unit. If your gas supply is not correct, do not 

instal in fireplace. Call dealer where you bought 

the appliance for proper type of appliance.

  WARNING:  This  appliance 

is equipped for (natural or pro-

pane/LP) gas. Field conversion 

is not permitted.

INSTALLATION AND CLEARANCES

Figure 2 shows technical information regarding 

the installation of your gas log set. Please make 

sure all specifications shown are applicable before 

installation is attempted.

LOG SIZING REQUIREMENTS

 

MINIMUM FIREBOX SIZE

LOG 

 

 

FRONT  REAR* MIN. FLUE

SIZE  HEIGHT  DEPTH  WIDTH  WIDTH 

 SIZE

18" 

20" 

14" 

25"  20.5" 

6.5"

24" 

20" 

14" 

29"  24.5" 

6.5"

*Measured at 14" depth

Figure 4 - Attaching Damper Clamp 

Manufactured 

Fireplace

Masonry 

Fireplace

Damper

Damper 
Clamp

Damper

Damper 
Clamp

Damper

VENTING SPECIFICATIONS FOR 
INSTALLATION

The fireplace chimney flue and vent must be draft-

ing properly. To check the vent for proper drafting: 

Light a tightly rolled newspaper on one end and 

place it at the inside front edge of the fireplace. 

Observe the smoke and be sure the vent is properly 

INSTALLATION

Continued 

SPECIFICATIONS (W.C.)

 

FUEL INLET   

MANIFOLD

 

PRESSURE   

PRESSURE

 

Min.  Max. 

NG 

7" 

10.5" 

3.5"

LP 

11" 

14" 

10"

FLUE OPENING SPECIFICATIONS

Note:

 This vented appliance must be installed only 

in a solid-fuel burning or UL127 factory-built fire-

place constructed of noncombustible material and 

connected to a working flue. The fireplace chimney 

must have a permanent vent opening to outside  

with minimum openings shown in Figure 3.

Figure 2 - Technical Information Chart

Figure 3 - Sizes and Clearances

drawing it up the chimney. If the smoke spills out 

into the room, extinguish the flame and remove any 

obstruction until proper venting is achieved.
The chimney flue damper must be fixed open to pro-

vide a minimum of 32 square inch of free air opening 

at all times during operation of the log set. A damper 

clamp is included to secure the damper.
The minimum flue sizes shown in Figure 3 are 

based on a 6' chimney height using round pipe. Your 

minimum flue size will vary based on input rate and 

chimney height. Refer to the 

National Fuel Gas Code 

ANSI Z223.1/NFPA 54, Section 6.6 

for details.

INSTALLING DAMPER CLAMP

Secure the damper stop clam to the edge of the 

damper as shown in Figure 4. If for any reason 

this clamp doesn't work on your fireplace, another 

suitable clamp or permanent stop must be installed, 

or the damper blade must be cut or removed.

Valve Bracket

INSTALLING REMOTE CONTROL 
ACCESSORY BRACKET

If installing optional remote control accessory you 

will need to install the remote accessory bracket 

for the receiver. 
Use screws provided to attach bracket to valve 

bracket as shown in Figure 5.
Follow  installation  instructions  included  with 

remote accessory.

Figure 5 - Attaching Remote Bracket to 

Valve Bracket

Remote 
Bracket

Summary of Contents for Firewerks VTDMV18NA

Page 1: ...ny 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...

Page 2: ...33 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation This appliance may be installed in an aftermarket per manently located manufactured mobile home where not prohibited by local codes This app...

Page 3: ...ent 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 log set WARNING Do not place log s...

Page 4: ...ss provided by other means screens shall have openings for introduction of combustion air 8 Toreducethecreationofsoot followtheinstruc tions in Cleaning and Maintenance page 12 SAFETY INFORMATION Cont...

Page 5: ...d ser vice person must install heater Follow all local codes WARNING Before installing in a solid fuel burning replace the chimney ue and rebox must be cleaned of soot creo sote ashes and loose paint...

Page 6: ...nly in a solid fuel burning or UL127 factory built re place constructed of noncombustible material and connected to a working ue The replace chimney must have a permanent vent opening to outside with...

Page 7: ...ction to the control valve INSTALLATION Continued CAUTION Never connect propane LP unit directly to the propane LP supply This unit re quiresanexternalregulator not supplied Install the external regul...

Page 8: ...ssure Propane LP From External Regulator 11 W C to 14 W C Pressure 3 Min Pipe Cap Tee Nipple Joint CHECKING GAS CONNECTIONS WARNING Testallgaspiping and connections for leaks after installing or servi...

Page 9: ...valve 3 Make sure control knob of appliance is in the OFF position 4 Check all joints from equipment shutoff valve to gas control see Figure 9 or 10 Apply noncorrosive leak detection uid to all joint...

Page 10: ...d separately see Accessories page 17 Follow instructions included with the remote control OPERATING APPLIANCE FOR YOUR SAFETY READ BEFORE LIGHTING WARNING Keep ue open when operating unit WARNING If y...

Page 11: ...e thermocouple to cool When the thermocouple cools the appliance will shut down If pilot ame pattern is incorrect as shown in Figure 16 turn appliance off see To Turn Off Gas to Appliance page 10 see...

Page 12: ...ignition propane LP gas supply may be low You may feel your gas pressure is too low If so contact your local propane LP or natural gas supplier TECHNICAL SERVICE You may have further questions about i...

Page 13: ...in gas lines when in stalled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 Gas regulator setting is in correct When ignitor button is pressed there is no spark at ODS pilot When igni...

Page 14: ...page 17 1 Contact local natural or propane LP gas company 2 Clean burner s see Cleaning and Maintenance page 12 1 Clean burner see Cleaning and Maintenance page 12 or replace burner ori ce 2 Replace d...

Page 15: ...2 Operate burners until air is removed from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum installation clearances see page 6 4 Clean burners see Cleaning and...

Page 16: ...nding while heating or contracting while cooling 1 Appliance burning vapors from paint hair spray glues cleaners chemicals new carpet etc See IMPORTANT statement above 2 Low fuel supply propane LP onl...

Page 17: ...2 6040 for referral information You can also write to the address listed on the back page of this manual EQUIPMENT SHUTOFF VALVE GA5010 Equipment shutoff valve with 1 8 NPT tap Fits 1 2 pipe FIREPLACE...

Page 18: ...www desatech com 114926 01B 18 ILLUSTRATED PARTS BREAKDOWN VTDMV24NA VTDMV24PA VTDMV18NA VTDMV18PA 1 2 3 4 5 6 17 16 15 7 8 9 10 11 12 14 13...

Page 19: ...ket 1 9 111807 01 111807 02 111807 01 111807 02 Valve 1 10 112376 01 103778 01 112376 01 103778 01 Pilot Assembly 1 11 111828 01 111818 01 111828 01 111828 01 Brass Fitting 2 12 114930 01 114930 01 11...

Page 20: ...The heater MUST be installed by a quali ed 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 conditi...

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