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UNVENTED (VENT-FREE)

NATURAL GAS LOG HEATER

Variable Manually-Controlled Models Also Design-Certified As

Vented Decorative Appliances

OWNER’S OPERATION AND INSTALLATION MANUAL

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WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury, or loss 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 electrical switch; do
not use any phone in your building.

Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.

If you cannot reach your gas sup-
plier, call the fire department.

— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.

WARNING: Improper installation, ad-
justment, alteration, service, or mainte-
nance can cause injury or property
damage. Refer to this manual for cor-
rect installation and operational proce-
dures. For assistance or additional in-
formation consult a qualified installer,
service agency, or the gas supplier.

WARNING: This is an unvented gas-fired heater. 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 Ventilation section on page 4 of this manual.

®

PI

LOT

O

F

F

O

N

LO

REMOTE

OFF

ON

HI

CFS18NR, VS18NR,

VS24NR   VS30NR

18", 24", and 30"

Remote-Ready Models

DESA INTERNATIONAL

This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by

state or local codes.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

WARNING: This appliance is for in-
stallation only in a solid-fuel burning
masonry or UL127 factory-built fire-
place, or in an approved ventless fire-
box. It is design-certified for these
installations in accordance with ANS
Z21.11.2. Exception: Do not install
this appliance in a factory-built fire-
place that includes instructions stat-
ing it has not been tested or should
not be used with unvented gas logs.

Summary of Contents for VS18NR

Page 1: ...roperty damage Refer to this manual for cor rect installation and operational proce dures For assistance or additional in formation consult a qualified installer service agency or the gas supplier WAR...

Page 2: ...with a fire placescreeninplace Makesurefireplace screen is closed before running heater 8 This log heater is designed to be smoke less If logs ever appear to smoke turn offheaterandcallaqualifiedservi...

Page 3: ...ed to ANS Z21 11 2 standard for unvented heaters State and local codes in some areas prohibit the use of vent free heaters This heater may also be operated as a vented decorative ANS Z21 60 product by...

Page 4: ...rating of one perm 6x10 11 kg per pa sec m2 or less with open ings gasketed or sealed and b weather stripping has been added on openable windows and doors and c caulking or sealants are applied to ar...

Page 5: ...ances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used _________________ Btu Hr max...

Page 6: ...d Crawl Space To Crawl Space To Attic Or Remove Door into Adjoining Room Option 3 Ventilation Grills Into Adjoining Room Option 2 Ventilation Grills Into Adjoining Room Option 1 12 12 Figure 2 Ventila...

Page 7: ...l codes INSTALLATION CHECK GAS TYPE Use only natural gas If your gas supply is not natural gas do not install heater Call dealer where you bought heater for proper type heater INSTALLATION AND CLEARAN...

Page 8: ...ntel If not using a mantel follow the information below You must have noncombustible material s above the fireplace opening Noncombus tible materials such as slate marble tile etc must be at least 1 2...

Page 9: ...pening Underside of Mantel Shelf Mantel Shelf 12 A 20 241 2 271 2 30 All minimum distances are in inches 2 1 2 6 8 10 Minimum Noncombustible Material 8 Min 12 15 18 All minimum distances are in inches...

Page 10: ...rsarelevel Ifheaterisnotlevel heaterwill not work properly Area of Various Standard Round Flues Diameter ins Area sq ins 5 20 sq inches 6 29 sq inches 7 39 sq inches 8 51 sq inches INSTALLING DAMPER C...

Page 11: ...ed Purchase the optional A G A design certified manual shutoff valve from your dealer See Accessories page 23 Minimum inlet pressure for purpose of input adjustment Figure 13 Gas Connection Tee Joint...

Page 12: ...ts individual manual shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator 2 Cap off open end of gas pipe where manual shutoff valve was connected 3...

Page 13: ...ure 16 Push back of logs flush with metal grate bar Note 18 model has only one front log 2 Rest bottom middle log 2 behind metal posts on front burner Make sure the grooves in the bottom of the log fi...

Page 14: ...re to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not us...

Page 15: ...em etc For wall thermostat operation follow in struction supplied with thermostat acces sory GWMT1 For wall switch operation followinstructionssuppliedwithGWMS2 OPTIONAL REMOTE OPERATION NOTICE You mu...

Page 16: ...Off with the Hand Held Remote Unit Figure 24 Thermostat Hand Held Remote Control Unit Selections GHRCT only The log heater will automatically cycle between pilot and the heat setting that has been se...

Page 17: ...e pattern Theincorrectpilotflameisnottouch ing the thermocouple This will cause the thermocouple to cool When the thermo couple cools the heater will shut down If pilot flame pattern is incorrect as s...

Page 18: ...ware store or home center may carry com pressed air in a can You can use a vacuum cleaner in the blow position If using com pressed air in a can please follow the direc tions on the can If you don t f...

Page 19: ...D PROBLEM When ignitor button is pressed there is no spark at ODS pilot When ignitor button is pressed there is spark at ODS pilot but no ignition ODS pilot lights but flame goes out when control knob...

Page 20: ...en using furniture polish wax carpet cleaners or similar products 1 Replace 9 volt batteries in receiver and remote control OBSERVED PROBLEM One or both burners do not light after ODS pilot is lit Del...

Page 21: ...SIBLE CAUSE 1 Metal expanding while heating or con tracting while cooling 1 Heater burning vapors from paint hair spray glues cleaners chemicals new carpet etc See IMPORTANT state ment above 2 Low fue...

Page 22: ...r TECHNICAL SERVICE You may have further questions about in stallation operation or troubleshooting If so contact DESA International s Technical Service Department at 1 800 DESA LOG 1 800 337 2564 You...

Page 23: ...LL MOUNT ON OFF SWITCH GWMS2 Not Shown For all models Allows the gas log heater to be turned on and off with a wall switch WALL MOUNT THERMOSTAT SWITCH GWMS1 Not Shown For all models The desired comfo...

Page 24: ...URAL GAS LOG HEATER DESA INTERNATIONAL ILLUSTRATED PARTS BREAKDOWN VARIABLE CONTROL CFS18NR VS18NR VS24NR VS30NR 8 9 10 11 8 8 12 13 23 14 26 27 6 6 16 19 31 21 22 29 30 17 24 20 15 28 18 10 1 10 2 6...

Page 25: ...271 03 Ignitor Cable 1 14 102445 01 102445 01 102445 01 Piezo Ignitor 1 15 103588 01 103588 01 103588 01 Heat Shield 1 16 103782 01 103782 01 103782 01 Valve Bracket 1 17 M12461 26 M12461 26 M12461 26...

Page 26: ...such other costs related to repairing a defective heater will be the responsibility of the owner TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT THIS EXPRESS WARRANTY EX...

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