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119421-01E

9

InSTALLATIOn AnD CLEARAnCES
(Vent-Free Operation Only)

  WARNING:  Maintain  the 

minimum  clearances.  If  you 

can, provide greater clearances 

from floor, ceiling and adjoining 

wall.

MInIMUM FIREpLACE CLEARAnCE 

TO COMBUSTIBLE MATERIALS

Side Wall 16", Ceiling 42"

LOG SIZING REQUIREMENTS

Minimum Firebox

Height

Depth

Front 

Width

Rear 

Width*

17"

14"

24"

20"

* Measured at 14" depth.
Carefully follow the instructions below. This 
will ensure safe installation into a masonry, 
UL127-listed manufactured fireplace or certi

-

fied vent-free firebox.

Minimum Clearances For Side 
Combustible Material, Side Wall and 
Ceiling

A.  Clearances from the side of the fireplace 

cabinet to any combustible material and 

wall should follow diagram in Figure 4.

 

Example:

 The face of a mantel, bookshelf, 

etc. is made of combustible material and 
protrudes 3 

1

/

2

" from the wall. This com

-

bustible material must be 4" from the side 
of the fireplace opening (see Figure 4).

 

Note: When installing your gas logs into 

a  manufactured  firebox,  follow  firebox 

manufacturer’s instructions for minimum 
clearances to combustible materials.

B.  Clearances from the top of the fireplace 

opening to the ceiling should not be less 

than 42".

INSTALLATION

Continued

Figure 4 - Minimum Clearance for 

Combustible to Wall 

*Minimum 16" from Side Wall 

Example

*

NOTICE: Manual control heaters 

may be used as a vented product. 

If so, you must always run heater 

with chimney flue damper open. 

If  running  heater  with  damper 

open, noncombustible material 

above fireplace opening is not 

needed. Go to 

Installing Damper 

Clamp  Accessory  for  Vented 

Operation

, page 11.

Minimum Noncombustible Material 
Clearances

If Not Using Mantel

Note: If using a mantel, proceed to If Using 
Mantel, page 10. If not using a mantel, follow 
the information below.

You  must  have  noncombustible  material(s) 
above the fireplace opening. Noncombustible 
materials  (such  as  slate,  marble,  tile,  etc.) 
must be at least 1/2" thick. With sheet metal, 

you must have noncombustible material be-
hind it. Noncombustible material must extend 

at least 8" up. If noncombustible material is 
less than 12", you must install the fireplace 
hood accessory. See Figure 5, page 10 for 

minimum clearances.

IMPORTANT:

 If you cannot meet these mini-

mum  clearances,  you  must  operate  heater 
with chimney flue damper open. Go to 

Install-

ing  Damper  Clamp  Accessory  for  Vented 
Operation,

 page 11.

Summary of Contents for HDVF3018N

Page 1: ...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...

Page 2: ...itisinstalled Provisions for adequate combustion and ventila tion air must be provided RefertoAirforCombustion and Ventilation section on page 5 of this manual This appliance may be in stalled in an a...

Page 3: ...ntrols can be dangerous WARNING Donotallowfans toblowdirectlyintothefireplace Avoidanydraftsthatalterburner flame patterns Ceiling fans can create drafts that alter burner flame patterns Altered burne...

Page 4: ...1 Before using furniture polish wax carpet cleaner or similar products turn heater off If heated thevaporsfromtheseproductsmay create a white powder residue within burner box or on adjacent walls or f...

Page 5: ...ibit the use of vent free heaters This heater may also be operated as a vented decorative ANSI Z21 60 product by opening the flue damper Safety Pilot This heater has a pilot with an Oxygen Deple tion...

Page 6: ...ining Fresh Air Flow for Heater Location Confined and Unconfined Space National Fuel Gas Code ANSI Z223 1 NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1 000...

Page 7: ...l GasCode ANSIZ223 1 NFPA54 theInternationalFuelGasCode or applicable local codes VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space When...

Page 8: ...nce is equipped for either natural gas or propane LP gas but not both Gas type is indicated on the rat ingplate Fieldconversionisnot permitted NOTICE Thisheater isintended for use as supplemental heat...

Page 9: ...rances to combustible materials B Clearances from the top of the fireplace opening to the ceiling should not be less than 42 INSTALLATION Continued Figure 4 Minimum Clearance for Combustible to Wall M...

Page 10: ...ed Follow minimum clear ances shown in Figure 7 page 11 when using hood NOTICE Surface temperatures of adjacent walls and mantels become hot during operation Walls and mantels above the firebox may be...

Page 11: ...Clamp Damper Floor Clearances A If installing appliance on the floor level you must maintain the minimum distance of 14 to combustibles see Figure 8 B If combustible materials are less than 14 to the...

Page 12: ...ot heater will move when you adjust controls Moving heater may cause a gas leak CAUTION Do not pick up heater base assembly by the burner This could damage heater Only handle base as sembly by grates...

Page 13: ...to test gauge connection Purchase the optional CSA design certified equipment shutoff valve from your dealer For propane LP units the installer must supply an external regulator The external regulator...

Page 14: ...e Pipe Cap Joint Nipple Propane LP From External Regulator 11 W C to 14 W C Pressure Natural From Gas Meter 5 W C to 10 5 W C Pressure controls If sediment trap is not installed or is installed wrong...

Page 15: ...all joints from equipment shutoff valve to control valve see Figures 16 and 17 Apply noncorrosive leak detection fluid to all joints Bubbles forming show a leak 5 Correct all leaks at once 6 Light hea...

Page 16: ...ee Figure 20 4 Locate holes on bottom of right crossover log 4 Slide holes onto right pin on middle log 2 and right pin on back log 3 See Figure 21 for placement 5 Locate holes on bottom of middle cro...

Page 17: ...clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information column 1 If you don t smell gas go to the next step FOR YOUR SAFETY READ BEFORE L...

Page 18: ...y press and turn control knob coun terclockwise to the PILOT position Press in control knob for five 5 seconds see Figure 22 Note You may be running this heater for the first time after hooking up to...

Page 19: ...ff Gas to Ap pliance page 18 see Troubleshooting page 21 Note The pilot flame on natural gas units will have a slight curve but flame should be blue and have no yellow or orange color WARNING Turn off...

Page 20: ...flame comes out of the pilot assembly see Figure 27 With the unit off lightly blow air through the air inlet hole You may blow through a drinking straw if compressed air is not available Figure 26 In...

Page 21: ...talled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 Gas regulator setting is not correct REMEDY 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep...

Page 22: ...equipment shut off valve 4 A Contact local propane LP or natural gas com pany B Clean ODS pilot see Cleaning and Maintenance page 19 or replace ODS pilot assembly 5 Hand tighten until snug then tight...

Page 23: ...ocal propane LP or natural gas company 3 Observeminimuminstallation clearances see page 9 4 Clean burner see Cleaning and Maintenance page 19 or replace burner orifice 1 Turn heater off when us ing fu...

Page 24: ...tement above 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning statement above REMEDY 1 Open window and venti late room Stop using odor causing product...

Page 25: ...ass For all models Helps deflect heat away from mantel or wall above fireplace Note Use only original replacement parts This will protect your warranty coverage for parts replaced under warranty Parts...

Page 26: ...www desatech com 119421 01E 26 Parts Variable Manually Controlled MODELS HDVF3018P AND HDVF3018N 24 21 11 12 13 4 6 3 2 21 8 21 7 10 9 16 15 17 19 22 18 14 19 23 20 18 5 1...

Page 27: ...056 19 Burner Orifice Injector LP 1 099056 26 Burner Orifice Injector NG 1 12 111124 01 Burner Retainer Spring 1 13 102980 01 Burner 1 14 119583 01 Control Valve LP 1 102568 07 Control Valve NG 1 15 0...

Page 28: ...proved by DESA Heating LLC Warranty parts must be obtained through authorized dealers of this prod uct and or DESA Heating LLC who will provide original factory replacement parts Failure to use origin...

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