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www.desatech.com

107882-01M

8

IMPORTANT:

 

Vent-free heaters add moisture to 

the air. Although this is beneficial, installing heater 

in rooms without enough ventilation air may cause 

mildew to form from too much moisture. See 

Air for 

Combustion and Ventilation, 

page 5. If high humid-

ity is experienced, a dehumidifier may be used to 

help lower the water vapor content in the air.
For convenience and efficiency, install heater
•  where there is easy access for operation, inspec-

tion and service

•  in coldest part of room
An optional fan kit is available from your dealer. 

See 

Accessories

, page 26. If planning to use fan, 

locate heater near an electrical outlet.

INSTALLATION

Continued

Figure 5 - Attaching Thermostat Sensing 

Bulb

Clamp

Thermostat 
Sensing 
Bulb

LOCATING HEATER

  WARNING:  Maintain  the 

minimum  clearances  shown 

in Figure 4. If you can, provide 

greater  clearances  from  floor, 

ceiling and joining wall.

A wall mounting bracket is included with this 

heater. An Optional Base Kit (GA4550) may be 

purchased to allow the unit to be installed away 

from a wall (see 

Accessories

, page 26). Determine 

which method is best for your application.

 WARNING: Never install the 

heater

•  in a bedroom or bathroom 

•  in a recreational vehicle

•  where  curtains,  furniture, 

clothing  or  other  flammable 

objects are less than 36 inches 

(91.5 cm) from the front, top or 

sides of the heater

•  as a fireplace insert

•  in high traffic areas

•  in windy or drafty areas

 CAUTION: If you install the 

heater in a home garage

•  heater  pilot  and  burner  must 

be at least 18 inches (45.7 cm) 

above floor

•  locate  heater  where  moving 

vehicle will not hit it

 CAUTION: This heater creates 

warm air currents. These currents 

move heat to wall surfaces next 

to  heater.  Installing  heater  next 

to  vinyl  or  cloth  wall  coverings 

or operating heater where impu-

rities (such as, but not limited to, 

tobacco smoke, aromatic candles, 

cleaning  fluids,  oil  or  kerosene 

lamps, etc.) in the air exist, may 

discolor walls or cause odors.

Minimum
From
Sides Of
Heater

FLOOR

CEILING

36"

(91.5 cm)

Minimum

Minimum To Top

Surface Of Carpeting,

Tile Or Other

Combustible Material

Left
Side

Right
Side

6" (15.2 cm) Blue Flame
10" (25.4 cm) Plaque

2" (5.1 cm)

Figure 4 - Mounting Clearances As 

Viewed From Front of Heater

THERMOSTAT SENSING BULB

The thermostat sensing bulb is below the heater.
1.  Place clamp on thermostat sensing bulb as 

shown  in  Figure  5.  Clamp  is  provided  in 

hardware package.

2.  Snap clamp into upper mounting hole as shown 

in Figure 5. Mounting hole is located on lower 

left edge on back of heater. Make sure the 

thermostat sensing bulb is pointing up.

Summary of Contents for CBN20T

Page 1: ...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 Immediatelycallyourgassupplierfromaneighbor s phone Follow the g...

Page 2: ...This appliance is not convert ible for use with other gases Aftermarket Completion of sale not for purpose of resale from the manufacturer State of Massachusetts The installation must be made by a li...

Page 3: ...s heater WARNING Any change to this heater or its controls can be dangerous WARNING Do not use a blower insert heat exchanger insertorotheraccessorynotap proved for use with this heater Due to high te...

Page 4: ...vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture 14 Provide adequate clearances around air openings LOCAL CODES Installanduseheaterwithc...

Page 5: ...air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusually...

Page 6: ...space can support _________ Btu Hr actual amount of Btu Hr used Example 51 200 Btu Hr maximum the space can support 60 000 Btu Hr actual amount of Btu Hr used AIR FOR COMBUSTION AND VENTILATION Conti...

Page 7: ...ntended for use as supplemental heat Use this heater along with your primary heating system Do not install this heater as your pri mary heat source If you have a centralheatingsystem youmay run system...

Page 8: ...r bathroom in a recreational vehicle where curtains furniture clothing or other ammable objectsarelessthan36inches 91 5 cm from the front top or sides of the heater as a replace insert in high traf c...

Page 9: ...ng Screws Through Last Hole On Each End Only Insert Mounting Screws Through Last Hole On Each End Floor Floor Figure 8 Mounting Bracket Clearances 8 20 3 cm Min Adjoining Wall Adjoining Wall Only Inse...

Page 10: ...ION Continued Figure 9 Folding Anchor Figure 10 Popping Open Anchor Wings For Thin Walls Figure 11 Mounting Heater Onto Mounting Bracket Mounting Bracket attached to wall Horizontal Slots Stand Out Ta...

Page 11: ...pres sure heater regulator damage could occur Install the external regulator with the vent pointing down as shown in Figure 14 page 12 Pointing the vent down protects it from freezing rain or sleet M...

Page 12: ...er 4 W C to 10 5 W C Pressure Propane LP From External Regulator 11 W C to 14 W C Pressure Ground Joint Union Tee Joint Reducer Bushing to 1 8 NPT 1 8 NPT Plug Tap CAUTION Use only new black iron or s...

Page 13: ...supply Check reconnected t tings for leaks TestPressuresEqualToorLessThan1 2PSIG 3 5 kPa 1 Close equipment shutoff valve see Figure 16 2 Pressurize supply piping system by either opening propane LP s...

Page 14: ...ons exactly a re or explosion may result 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 instru...

Page 15: ...e PILOT position THERMOSTAT CONTROL OPERATION The thermostatic control used on these models differs from standard thermostats Standard thermostats simply turn on and off the burner The thermostat used...

Page 16: ...ater inspected yearly by a quali ed 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 op...

Page 17: ...ilot Assembly Pilot Air Inlet CLEANING AND MAINTENANCE Continued CABINET Air Passageways Use a vacuum cleaner or pressurized air to clean Exterior Use a soft cloth dampened with a mild soap and water...

Page 18: ...gas lines when installed 5 Depleted gas supply propane LP gas 6 ODS pilot is clogged 7 Gas regulator setting is not correct REMEDY 1 Replace pilot assembly 2 Replace pilot assembly 3 Reconnect ignito...

Page 19: ...pilotlights keepcon trol knob pressed in 30 seconds 3 Fully open equipment shutoff valve 4 Hand tighten until snug then tighten 1 4 turn more 5 A Contact local natural or propane LP gas company B Cle...

Page 20: ...isiscommonwithmostheat ers Ifnoiseisexcessive contact quali ed service person 1 Turn control knob to the low est position and let warm up for a minute 2 Operate burner until air is removed from line H...

Page 21: ...e 2 Low fuel supply propane LP gas 3 Gas leak See Warning statement at top of page 1 Gas leak See Warning statement at top of page 2 Control valve defective 1 Foreign matter between con trol valve and...

Page 22: ...t 21 9 lb 9 9 kg Average Shipping Weight 25 4 lb 11 5 kg CBT20PT Propane LP Gas 10 000 20 000 Btu Hr Variable Electronic Ignition Pressure Regulator Setting 8 W C Inlet Gas Pressure in of water Maximu...

Page 23: ...number of your heater the replacement part number SERVICE PUBLICATIONS Youcanpurchaseaservicemanualfromtheaddress listed on the back page of this manual Send a check for 5 00 payable to DESA Heating P...

Page 24: ...KDOWN MODELS CBN20T CBP20T CBN30T CBP30T CBT20NT CBT20PT CBT30NT AND CBT30PT AA Battery Positive UP AAA Battery Negative UP 2 9 10 11 12 13 14 16 18 19 4 15 3 5 6 8 20 9 1 1 7 17 21 Install battery ac...

Page 25: ...t 2 11 110803 01 ODS Pilot Assembly 1 110803 02 ODS Pilot Assembly 1 12 103446 02 Burner 1 103447 06 Burner 1 13 099387 03 3 16 Pilot Tubing 1 14 103845 05 Injector 1 103845 06 Injector 1 103845 07 In...

Page 26: ...OFF VALVE GA5010 For all models Equipment shutoff valve with 1 8 NPT tap FAN KITS GA3250T For all models Provides better heat distribution Makes heater more ef cient Complete installation and operatin...

Page 27: ...s Street Bowling Green KY 42103 3414 270 846 1199 1 800 654 8534 Fax 1 800 846 0090 franktalk aol com Master Parts Dist 1251 Mound Ave NW Grand Rapids MI 49504 2672 616 791 0505 1 800 446 1446 www nbm...

Page 28: ...s of this product and or DESAHeating Products who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty The heater MUST be installed by...

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