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6

103546

FRESH AIR

FOR

COMBUSTION

AND

VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this worksheet to determine if you have a confined or unconfined space.

Space:

 Includes the room in which you will install heater plus any adjoining rooms with

doorless passageways or ventilation grills between the rooms.

1. Determine the volume of the space (length x width x height).

Length x Width x Height =

___________________

cu. ft. (volume of space)

Example:

Space size

20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) =
2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the
volume of these rooms to the total volume of the space.

2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space

can support.

____________ (volume of space) 

÷

 50 cu. ft. = (Maximum Btu/Hr

the space can support)

Example: 

2560 cu. ft. (volume of space) 

÷

 50 cu. ft. =

51.2 or 51,200 (maximum

Btu/Hr the space can support)

3. Add the Btu/Hr of all fuel burning appliances in the space.

Vent-free heater

___________________ Btu/Hr

Gas water heater*

___________________ Btu/Hr

Gas furnace

___________________ Btu/Hr

Vented gas heater

___________________ Btu/Hr

Gas fireplace logs

___________________ Btu/Hr

Other gas appliances*

___________________ Btu/Hr

Total

___________________ Btu/Hr

Example:

Gas water heater

44,000

Btu/Hr

Vent-free heater

+

10,000

Btu/Hr

Total

=

54,000

Btu/Hr

* Do not include direct-vent gas appliances. 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 (maximum the space can support)
_________________ Btu/Hr (actual amount of Btu/Hr used)

Example:

51,200

Btu/Hr (maximum the space can support)

54,000

Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a confined space because the actual Btu/Hr used is more
than 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 unconfined space, remove door to adjoining room or add ventilation grills between
rooms. See Ventilation Air From Inside Building, page 7.

B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space
is an unconfined space. You will need no additional fresh air ventilation.

Summary of Contents for Comfort Glow CGN10L

Page 1: ...mmediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be perform...

Page 2: ...losion and carbon monoxide poisoning WARNING ICON G 001 DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning resemble the flu with head...

Page 3: ...ter if not enough fresh air is available See Fresh Air for Combus tion and Ventilation pages 5 through 8 6 Keep all air openings in front and bottom of heater clear and free of debris This will insure...

Page 4: ...gnitor Button 1 Remove heater from carton 2 Remove all protective packaging applied to heater for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you...

Page 5: ...ction The 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...

Page 6: ...d gas heater ___________________ Btu Hr Gas fireplace logs ___________________ Btu Hr Other gas appliances ___________________ Btu Hr Total ___________________ Btu Hr Example Gas water heater 44 000 B...

Page 7: ...Building This fresh air would come from an adjoining unconfined space When ventilating to an adjoining unconfined space you must provide two permanent openings one within 12 of the ceiling and one wi...

Page 8: ...ra fresh air by using ventilation grills or ducts You must provide two permanent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors or sp...

Page 9: ...0 If you can provide greater clearances from floor ceiling and joining wall WARNING ICON G 001 CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches abo...

Page 10: ...R JOINING WALL WARNING ICON G 001 WARNING Maintain minimum clearances shown in Figure 5 If you can provide greater clearances from floor and joining wall INSTALLINGTO WALL Continued For convenience an...

Page 11: ...Drill holes at marked locations using 5 16 drill bit For solid walls concrete or masonry drill at least 1 1 4 deep 2 Fold wall anchor see Figure 6 3 Insert wall anchor wings first into hole Tap anchor...

Page 12: ...near bottom on back panel of heater see Figure 11 2 Mark screw location on wall 3 Remove heater from wall 4 If installing bottom mounting screw into hollow or solid wall install wall anchor Follow st...

Page 13: ...valves Install sediment trap in supply line as shown in Figure 12 page 14 Locate sediment trap where it is within reach for cleaning Locate sediment trap where trapped matter is not likely to freeze...

Page 14: ...gas piping and connections for leaks after installing or servicing Correct all leaks at once 3 Minimum Manual Shutoff Valve From Gas Meter 4 W C to 10 5 W C Pressure CONNECTING TO GAS SUPPLY Continued...

Page 15: ...RE TESTING HEATER GAS CONNECTIONS 1 Open manual shutoff valve see Figure 13 2 Open main gas valve located on or near gas meter 3 Make sure control knob of heater is in the OFF position 4 Check all joi...

Page 16: ...rn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a qualified service technician or gas supplier Force or attempted repair may result in...

Page 17: ...ass panel If needed keep pressing ignitor button until pilot lights Note If pilot does not stay lit refer to Troubleshooting pages 20 through 23 Also contact a qualified service person or gas supplier...

Page 18: ...t is lit After 30 seconds release control knob 5 Replace front panel OPERATING HEATER Continued Check pilot flame pattern and burner flame pattern often PILOT FLAME PATTERN Figure 17 shows a correct p...

Page 19: ...than 1 2 the glass panel height INSPECTING BURNER Continued WARNING ICON G 001 WARNING If yellow tipping occurs your heater could produce increased levels of carbon monoxide If burner flame pattern s...

Page 20: ...it WARNING ICON G 001 CAUTION You must keep control areas burner and circulating air passageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a qualifi...

Page 21: ...ausing pilot flame to go out This problem could be caused by one or both of the following A Low gas pressure B Dirty or partially clogged ODS pilot 6 Thermocouple dam aged 7 Control valve damaged REME...

Page 22: ...eater blocked 4 Dirty or partially clogged burner orifice REMEDY 1 Clean burner orifice see Cleaning and Mainte nance page 20 or replace burner orifice 2 Replace burner orifice 3 Contact local natural...

Page 23: ...nnections page 14 1 Refer to Fresh Air for Combustion and Venti lation requirements page 5 OBSERVED PROBLEM Heater produces a clicking ticking noise just after burner is lit or shut off Heater produce...

Page 24: ...l s Technical Service Department at 1 800 323 5190 for referral information When contacting your dealer or DESA International have ready your name your address model number of your heater how heater w...

Page 25: ...ter PA 19382 215 696 2670 1 800 368 0803 LA Porte s Parts Service 2444 North 5th Street Hartsville SC 29550 803 332 0191 Parts Department Cans Unlimited Inc P O Box 645 Taylor SC 29687 All States 803...

Page 26: ...26 103546 HEATER EXPLODED VIEW 10 12 11 1 2 3 4 5 6 7 9 8 10 13 14 15 16 17 18 21 23 24 27 22 26 25 19 20 28 29 CGN10L CGN6L...

Page 27: ...ssembly 1 12 1 098514 01 098514 01 Thermocouple 1 12 2 098594 01 098594 01 Ignitor Electrode 1 13 099386 02 099386 02 Burner 1 14 099387 05 099387 05 Pilot Tubing 1 15 098251 01 098251 03 Injector 1 1...

Page 28: ...oes not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects cau...

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