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119421-01E

19

INSPECTING bURNERS

BURNER PRIMARY AIR HOLES

Air is drawn into the burner through the holes 
in  the  fitting  at  the  entrance  to  the  burner. 
These holes may become blocked with dust, 

lint or pet hair. Periodically inspect these holes 
for  any  blockage  and  clean  as  necessary. 

Blocked air holes will create soot.

MAIN BURNER

Periodically inspect all burner flame holes with 
the  heater  running. All  slotted  burner  flame 
holes should be open with yellow flame pres

-

ent. All round burner flame holes should be 
open with a small blue flame present. Some 
burner flame holes may become blocked by 
debris  or  rust,  with  no  flame  present.  If  so, 

turn off heater and let cool. Remove blockage. 

Blocked burner flame holes will create soot.

Figure 24 - Correct Pilot Flame Pattern

Figure 25 - Incorrect Pilot Flame Pattern

Thermocouple

Pilot Burner

Thermocouple

Pilot Burner

CLEANING AND MAINTENANCE

Check  pilot  flame  pattern  and  burner flame 

patterns often.

pILOT FLAME pATTERn

Figure 24 shows a correct pilot flame pattern. 
Figure 25 shows an incorrect pilot flame pat

-

tern. The incorrect pilot flame is not touching 
the thermocouple. This will cause the thermo

-

couple to cool. When the thermocouple cools, 
the heater will shut down.
If  pilot  flame  pattern  is  incorrect,  as  shown 

in Figure 25

•  turn heater off (see 

To Turn Off 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  heater 

and let cool before cleaning.

  CAUTION:  You  must  keep 

control areas, burner and circu-

lating air passageways of heater 

clean.  Inspect  these  areas  of 

heater  before  each  use.  Have 

heater  inspected  yearly  by  a 

qualified service person. Heater 

may need more frequent clean-

ing  due  to  excessive  lint  from 

carpeting, bedding material, pet 

hair, etc.

  WARNING:  Failure  to  keep 

the  primary  air  opening(s)  of 

the burner(s) clean may result in 

sooting and property damage.

BURNER INjECTOR HOLDER AND 
pILOT AIR InLET HOLE

The primary air inlet holes allow the proper 
amount of air to mix with the gas. This pro

-

vides  a  clean  burning  flame.  Keep  these 
holes  clear  of  dust,  dirt,  lint  and  pet  hair. 

Clean  these  air  inlet  holes  prior  to  each 

heating season. Blocked air holes will create 

soot. We recommend that you clean the unit 
every  three  months  during  operation  and 

have heater inspected yearly by a qualified 

service person.
We also recommend that you keep the burner 
tube and pilot assembly clean and free of dust 

and dirt. To clean these parts we recommend 

using compressed air no greater than 30 PSI. 

Your local computer store, hardware store or 

home center may carry compressed air in a 

can. If using compressed air in a can, please 
follow the directions on the can. If you don’t 
follow directions on the can, you could dam

-

age the pilot assembly.

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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