Desa Tech CGD3018P, CGD3924P, CGD3930P installation manual Determining AIR Flow for Heater Location

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AIR FOR COMBUSTION AND VENTILATION

Continued

6

DETERMINING AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this work sheet 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

 

40,000

Btu/Hr

Vent-free heater

+

39,000

Btu/Hr

Total

=

 

 

Btu/Hr

79,000

*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)

79,000

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 7.

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.

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Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASContents Safety Information 001 Operation Local Codes Unpacking Product FeaturesSafety Device Piezo Ignition SystemUnusually Tight Construction AIR for Combustion and VentilationProviding Adequate Ventilation Unconfined SpaceDetermining AIR Flow for Heater Location Determining if You Have a Confined or Unconfined SpaceVentilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Installing Check GAS TypeHigh traffic areas Windy or drafty areas Minimum Fireplace Clearance LOG Sizing RequirementsMinimum Wall and Ceiling Clearances see Figure Minimum Non Combustible Material Clearances If Using Mantel Floor Clearances Installing Damper Clamp Accessory for Vented Operation Attaching Damper ClampInstalling Heater Base Assembly Installation Items NeededConnecting to GAS Supply Attaching Base Assembly to Fireplace FloorExternal Regulator With Vent Pointing Down Pressure Testing gas Supply Piping system Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig Installing Logs Installing Back Log #1For Your Safety Read Before Lighting Operating HeaterVariable Control Operation Manual Lighting Procedure Control Knob Ignitor Button Inspecting Burners Pilot Flame PatternThermostat-Controlled Models Only ODS/PILOT and Burner Cleaning and Maintenance Trouble ShootingTurn off heater and let cool before cleaning LogsCleaning and Mainte TROUBLE- ShootingRefer to Air for Com Gas leak. See Warning Optional Positioning of Thermostat Sensing Bulb Installing Thermostat Sensing Bulb behind Glass Doors Technical Service Service HintsModel Models Parts Under Warranty Parts Not Under WarrantyParts Central Hood GA6050 AccessoriesValve GA5010 Hood GA6052Illustrated Parts Breakdown Parts List CGD3018P CGD3924P CGD3930PCGD3924PT CGD3924PT 102991 102991 Warranty Information Keep this Warranty

CGD3924P, CGD3018P, CGD3930P specifications

The Desa Tech CGD3924P, CGD3930P, and CGD3018P represent a trio of high-performance gas fireplaces designed for modern home heating. These models are engineered to prioritize efficiency, style, and user comfort, making them an attractive addition to any living space.

The CGD3924P is a versatile fireplace primarily known for its contemporary front design and compact size, suitable for smaller rooms. It features a dual burner system, which enhances the flame presence and warmth distribution. The unit operates on natural gas and includes a built-in blower, facilitating effective heat circulation throughout the area. Its adjustable flame height allows users to customize the ambiance, while the realistic log set contributes to the fireplace's authentic aesthetic.

Moving on to the CGD3930P, this model boasts a larger viewing area, offering an impressive flame display that becomes the focal point of any room. Its innovative technology features an advanced electronic ignition system for easy lighting and operation. This unit is designed with energy efficiency in mind, achieving high AFUE ratings that help reduce heating costs. The CGD3930P also includes a thermostatic remote control, providing convenience for users to adjust settings from across the room.

Lastly, the CGD3018P is a traditional-style fireplace that caters to homeowners seeking a classic charm. With detailed craftsmanship and an antique finish, it provides an inviting atmosphere. This unit features a single burner system, ideal for smaller spaces, delivering modest yet reliable heat output. The CGD3018P’s user-friendly design emphasizes ease of maintenance, highlighting its accessibility for routine care.

All three models utilize high-quality materials that enhance durability and safety, ensuring long-lasting performance. The fireplaces are equipped with safety features such as auto shut-off systems and venting options that comply with national safety standards.

In terms of installation, each unit provides flexible venting options, including direct vent capabilities, allowing for various setups to meet specific home requirements.

Ultimately, the Desa Tech CGD3924P, CGD3930P, and CGD3018P stand out in the market for their combination of cutting-edge technologies, aesthetic appeal, and user-friendly features, making them ideal choices for modern heating solutions in homes today.
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