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122136-01C

10

Minimum
Noncombustible 
Material 

Minimum
Noncombustible 
Material Height 

Distances to 
Underside of
Mantel 

Top of
Fireplace
Opening

Underside of
Mantel Shelf

Mantel Shelf

8"

(A) 

8" 14" 17" 20"

All minimum 
distances are
in inches

Log Set
All Models

2 1/2"

6"

8"

10"

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.

If Using Mantel

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. Even if noncombustible material 

is more than 12", you may need the hood ac

-

cessory to deflect heat away from your mantel 
shelf. See Figure 5 (see page 9), Figure 6 and 

Figure 7 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.

MANTEL CLEARANCES

In addition to meeting noncombustible mate-

rial clearances, you must also meet required 
clearances  between  fireplace  opening  and 

mantel shelf. If you do not meet the clearances 

listed below, you will need a hood.

Determining Minimum Mantel Clearance

If  you  meet  minimum  clearance  between 

mantel shelf and top of fireplace opening, a 
hood is not required (see Figure 6).

INSTALLATION

Continued

Determining Minimum Mantel Clearance 
when Using a Hood

If minimum clearances in Figure 6 are not met, 

you must have a hood. When using a hood 
there are still certain minimum mantel clear-

ances required. Follow minimum clearances 

shown in Figure 7 when using a hood.

NOTICE: Surface temperatures 

of  adjacent  walls  and  mantels 

become  hot  during  operation. 

Walls  and  mantels  above  the 

firebox  may  become  hot  to 

the touch. If installed properly, 

these  temperatures  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:

•  operate the logs only with the 

flue damper open

•  raise the mantel to an accept

-

able height

•  remove the mantel

Figure 6 - Minimum Mantel Clearances 

Without Using Hood

Figure 7 - Minimum Mantel Clearances 

When Using Hood

Minimum
Noncombustible 
Material 

8"
Min.

12" 15" 18"

All minimum 
distances are
in inches

20"

2 1/2"

6"

8"

10"

12"

Distances to 
Underside of
Mantel 

Hood (GA6050,
GA6052 and
GA6053)

Top of 
Fireplace
Opening

Underside of
Mantel Shelf

Mantel Shelf

Summary of Contents for VSB18N

Page 1: ...se any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and...

Page 2: ...id fuel burning masonry or UL127 factory built fireplace or in a listed ventless firebox enclo sure It is design certified for these installations in accordance with ANSI Z21 11 2 Exception Do not ins...

Page 3: ...ll warnings Keep this manual for reference It is your guide to safe and proper operation of this fireplace WARNING Any change to this heater or its controls can be dangerous WARNING Do not use a blowe...

Page 4: ...ank of less than 100 lbs capacity is not recommended propane LP units only 4 If you smell gas shut off gas supply do not try to light any appliance do not touch any electrical switch do not use any ph...

Page 5: ...heaters Non thermostat models may also be operated as a vented decorative ANSI Z21 60 product by opening flue damper Safety Pilot This heater has a pilot with an Oxygen Deple tion Sensing ODS safety s...

Page 6: ...se volume is less than 50 cubic feet per AIR FOR COMBUSTION AND VENTILATION Continued 1 000 Btu per hour 4 8 m3 per kw of the ag gregate input rating of all appliances installed in that space and an u...

Page 7: ...asCode or applicable local codes VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space When ventilating to an adjoining unconfined space you...

Page 8: ...heat resistant sealant Do not seal chimney flue damper Installation WARNING Never install the heater in a bedroom or bathroom unless installed as a vented appliance see page 11 in a recreational vehi...

Page 9: ...ceiling should not be less than 42 Figure 4 Minimum Clearance for Combustible to Wall Minimum 16 from Side Wall Example INSTALLATION Continued NOTICE Manualcontrolheaters maybeusedasaventedproduct Ifs...

Page 10: ...t required clearances between fireplace opening and mantel shelf If you do not meet the clearances listed below you will need a hood Determining Minimum Mantel Clearance If you meet minimum clearance...

Page 11: ...ree 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...

Page 12: ...lant resistant to propane LP gas not provided electric drill with 3 16 drill bit flathead screwdriver 1 Apply pipe joint sealant lightly to male threads of the fitting to be threaded into gas regulato...

Page 13: ...ill reduce incoming gas pressure You must reduce incoming gas pressure to between 11 and 14 of water If you do not reduce incom ing gas pressure heater regulator damage could occur Install external re...

Page 14: ...lator 2 Cap off open end of gas pipe where equip ment shutoff valve was connected 3 Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main ga...

Page 15: ...check to see if flames contact any log Ifso repositionlogaccordingto the log installation instructions in this manual Flames contact ing log will create soot It is very important to install these logs...

Page 16: ...causing property damage per sonal injury or loss of life A This appliance has a pilot which must be lighted by hand When lighting the pilot follow these instructions exactly B BEFORE LIGHTING smell a...

Page 17: ...0 seconds release control knob Note If pilot goes out repeat steps 3 through 7 If control knob does not pop out when released contact a qualified service person or gas supplier for repairs 8 Slightly...

Page 18: ...ols the heater will shut down If pilot flame pattern is incorrect as shown in Figure 22 turn heater off see To Turn Off Gas to Ap pliance page 17 see Troubleshooting page 20 Note The pilot flame on na...

Page 19: ...older located at the end of the burner tube again Remove any large particles of dust dirt lint or pet hair with a soft cloth or vacuum cleaner nozzle Figure 23 Injector Holder On Outlet Burner Tube Bu...

Page 20: ...on 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 pressed in and turned t...

Page 21: ...act local natural or propane LP gas company 1 Contact local natural or propane LP gas company 2 Clean burner see Cleaning and Maintenance page 18 or replace burner orifice 1 Clean burner see Cleaning...

Page 22: ...burner until air is removed from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum installa tion clearances see page 8 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 18 1 Locate and c...

Page 24: ...uct If they can t supply original replacement part s call DESA Heating LLC at 1 866 672 6040 When calling DESA Heating LLC have ready your name your address model and serial numbers of your heater how...

Page 25: ...8 2195 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 2950 Fretz Valley Road...

Page 26: ...www desatech com 122136 01C 26 17 14 15 3 16 18 11 10 4 2 12 8 5 16 13 7 9 1 17 17 Parts Variable Manually Controlled HL18P HL18N VSB18P VSB18N HL24P HL24N VSB24P AND VSB24N...

Page 27: ...ith Ignitor LP 1 9 122141 01 Manual Valve Outlet Tube 1 10 122146 01 Natural Gas Plate 1 11 107186 05 Injector 1 107186 06 Injector 1 107186 07 Injector 1 107186 08 Injector 1 12 098354 01 Control Kno...

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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