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122493-01C

11

INSTALLATION

Continued

Figure 7 - Minimum Mantel Clearances 

When Using Hood

Minimum
Noncombustible 
Material 

8"
Min.

12" 15" 18" 20"

2½"

6"

8"

10"

12"

Distances to 
Underside of
Mantel 

Hood
(GA6050,
GA6052 or
GA6053)

Top of
Fireplace
Opening

Underside
of Mantel
Shelf

Mantel Shelf

14"

Min.

Combustible 

Material 

Noncombustible Material 

Hearth

5"

Min.

Combustible 

Material 

Figure 9 - Minimum Fireplace Clearances 

Above Combustible Flooring

Figure 8 - Minimum Fireplace Clearances 

If Installed at Floor Level

NOTICE:  Surface  temperatures 

of adjacent walls and mantels be-

come hot during operation. Walls 

and  mantels  above  the  firebox 

may  become  hot  to  the  touch. 

If installed properly, these tem-

peratures meet the requirement 

of the national product standard. 

Follow all minimum clearances 

shown in this manual.

NOTICE: If your installation does 

not  meet  the  minimum  clear-

ances shown, you must do one 

of the following:

•  raise the mantel to an accept-

able height

•  remove the mantel

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 fireplace, you must install appliance 
at least 5" above the combustible flooring 

(see Figure 9).

INSTALLING DAMPER CLAMP 
ACCESSORY FOR VENTED 
OPERATION

Note:  When  used  as  a  vented  heater,  ap-
pliance must be installed only in a solid-fuel 
burning  fireplace  with  a  working  flue  and 
constructed of noncombustible material.

For Massachusetts Residents Only:

 Instal-

lation of this gas log set as a vented appliance 

in the Commonwealth of Massachusetts re

-

quires the damper be permanently removed 

or welded in the fully open position.
If your heater is a manually-controlled model, 

you may use this heater as a vented product. 
There  are  three  reasons  for  operating  your 
heater in the vented mode.

1.  The fireplace does not meet the clearance 

to  combustibles  requirements  for  vent-
free operation.

2.  State or local codes do not permit vent-

free operation.

3.  You prefer vented operation.
If reasons number 1 or 2 above apply to you, 
you  must  permanently  open  chimney  flue 
damper. You must install the damper clamp 
accessory (to order, see 

Accessories

, page 

27).  This  will  insure  vented  operation  (see 
Figure 10, page 12). The damper clamp will 

keep  damper  open.  Installation  instructions 

are included with clamp accessory.

Summary of Contents for HDL18N

Page 1: ...cal switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire departme...

Page 2: ...vented gas fired heat er It uses air oxygen from the room in which it is installed Provisions for adequate combustion and ventilation air must be provided Refer to Air for Combustion and Ven tilation...

Page 3: ...nt 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 WARNING Any change to thi...

Page 4: ...l operation slight smok ing could occur due to log curing and heater burning manufacturing residues 10 To prevent the creation of soot follow the instructions in Cleaning and Maintenance page 19 11 Be...

Page 5: ...s sembly The data plates contain important warranty and safety information 1 Remove logs and heater base assembly from carton Note Do not pick up heater base assem bly by burners This could damage hea...

Page 6: ...ight construction you must provide additional fresh air Unusually tight construction is defined as construction where a walls and ceilings exposed to the out side atmosphere have a continuous water va...

Page 7: ...an the maximum Btu Hr the space can support You must provide additional fresh air Your options are as follows A Rework worksheet adding the space of an adjoining room If the extra space provides an un...

Page 8: ...ation for required size of ventilation grills or ducts IMPORTANT Do not provide openings for inlet or outlet air into attic if attic has a thermo stat controlled power vent Heated air entering the att...

Page 9: ...RANCE TO COMBUSTIBLE MATERIALS Side Wall 16 Ceiling 42 Front 36 Carefully follow the instructions below This will ensure safe installation into a masonry UL127 listed manufactured fireplace or certi f...

Page 10: ...is not required see Figure 6 Figure 6 Minimum Mantel Clearances Without Using Hood Determining Minimum Mantel Clearance when Using a Hood If minimum clearances in Figure 6 are not met you must have a...

Page 11: ...to combustibles see Figure 8 B If combustible materials are less than 14 to the fireplace you must install appliance at least 5 above the combustible flooring see Figure 9 INSTALLING DAMPER CLAMP ACC...

Page 12: ...eater control panel This will in sure adequate air flow and guard against sooting and controls be ingdamaged Raisefireplacefloor with noncombustible material Make sure material is secure CAUTION Do no...

Page 13: ...lregu lator not supplied Install the external regulator between the heater and propane LP supply WARNING For natural gas units never connect heater to private non utility gas wells This gas is commonl...

Page 14: ...ible Gas Hose if allowed by local codes Natural From Gas Meter 5 W C to 10 5 W C Pressure Propane LP From External Regulator 11 W C to 14 W C Pressure We recommend that you install sediment trap in su...

Page 15: ...m by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air 3 Check all joints from gas meter nat...

Page 16: ...will fit over burner see Figure 18 Holes in bottom of log must seat over pins on base as shown in Figure 18 Make sure back of log as Figure 18 Installing Main Log 1 Back Tab Burner Front Tab Notch for...

Page 17: ...to replace any part of the control system and any gas control which has been under water LIGHTING INSTRUCTIONS WARNING If fireplace has glass doors never operate this heater with glass doors closed If...

Page 18: ...tern Pilot Burner Thermocouple Pilot Burner Thermocouple Inspecting Burners Check pilot flame pattern and burner flame patterns often PILOT FLAME PATTERN Figure 22 shows a correct pilot flame pattern...

Page 19: ...to excessive lint from carpeting bedding material pet hair etc WARNING Failure to keep the primary air opening s of theburner s cleanmayresultin sooting and property damage Once every year a qualifie...

Page 20: ...ile in PILOT position 4 Air in gas lines when in stalled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 Gas regulator setting is not correct OBSERVED PROBLEM When control knob is pres...

Page 21: ...or propane LP gas company 1 Contact local natural or propane LP gas company 2 Clean burner see Cleaning and Maintenance page 19 or replace burner orifice 1 Clean burner see Cleaning and Maintenance pa...

Page 22: ...burner until air is removed from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum instal lation clearances see page 9 4 Clean burner see Cleaning and Maintenance...

Page 23: ...see Checking Gas Con nections page 14 1 Open window and or door for ventilation 2 Contact local natural or propane LP gas company 3 Clean ODS pilot see Cleaning and Maintenance page 19 1 Locate and c...

Page 24: ...www desatech com 122493 01C 24 Parts MODELS hdl18 n p vdb18 n p 1 18 19 2 16 4 15 15 8 9 11 21 5 12 3 10 17b 17c 17a 14 7 6...

Page 25: ...Burner Inlet Tube 1 9 108188 02 Screw Type U Drive 2 x 0 75 1 10 108134 01 NG Plate 1 11 099056 26 Injector 1 099056 19 Injector 1 12 099387 08 Pilot Tube 1 13 098249 01 ODS Nut 2 14 M11084 38 Screw H...

Page 26: ...eating LLC have ready model number of your heater the replacement part number Technical Service You may have further questions about instal lation operation or troubleshooting If so con tact DESA Heat...

Page 27: ...n Street Kansas City MO 64108 KS MO AR 816 842 3911 www washerparts com East Coast Energy Products 10 East Route 36 W Long Branch NJ 07764 732 870 8809 1 800 755 8809 www njplaza com ecep 21st Century...

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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