Desa GVC35PA, GVC50PA Combustion, Ventilation, Determining FRESH-AIR Flow for Heater Location

Page 15

FRESH AIR FOR

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

COMBUSTION

Example 1: Locating Heater in Unconfined (Open) Area

AND

 

NOTICE

 

VENTILATION

 

An unconfined area has a minimum air volume of 50

 

Continued

 

cubic feet for each 1000 BTU/Hr input rating of all

 

 

appliances in the area (cubic feet equals length x width

 

 

 

 

 

 

x height of area). Include adjoining rooms only if there

 

 

 

are no doors between the rooms or if you add ventila-

 

 

 

tion grills between the rooms (see Ventilating Confined

 

 

 

Area, page 17).

 

 

 

 

 

 

In an open area, the air that leaks around doors and windows may provide enough

 

fresh air for combustion and ventilation.

Draft Hood Spillage Test

Follow the steps below to see if enough fresh air is available.

1.Close all windows and doors.

2.If you have a fireplace, start a fire. Build fire until flames are burning strongly.

3.Turn on all exhaust fans. These include exhaust fans for kitchen, bathroom, water heaters (gas or electric), etc.

4.Turn on all vented gas appliances. These include any room heaters, water heaters, clothes dryer, etc.

5.Wait ten minutes for drafts to regulate.

6.Check for draft-hood spillage at each vented gas appliance. Do this by holding a lit match two inches from the draft opening (see Figure 9). If match flame pulls toward the draft hood, there is no spillage. If match flame blows away from the draft hood, there is spillage. This is a hazardous condition. See Draft Hood Spillage, page 16.

 

Vent Pipe

Vent Pipe

 

Draft Hood

 

Match

Heater

Typical

Match

Water

 

Heater

Draft Hood

 

 

Opening

Figure 9 - Checking for Draft Spillage

No Draft Hood Spillage: This shows there is enough fresh air in area for appliances. Turn off all exhaust fans and appliances if desired.

Continued

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Contents
OWNER’S Operation and Installation Manual For Your SafetyWhat to do if YOU Smell GAS Contents Carbon monoxide poisoning may lead to death SafetyInformation Electrical shock, and carbon monoxide poisoningSafety Information Identification ProductUnpacking FeaturesInstalling Heater Local CodesLocating Heater Installing HeaterVenting Heater Do not vent heater in any of the following ways see Figure Venting HeaterVenting Heater Proper Size Vent Supply. Follow all local codes Installing Connecting to GAS Supply Qualified service person must connect heater to gasGas Connection Test all gas piping and connections for leaks after install Checking GAS ConnectionsIng or servicing. Correct all leaks at once Fresh AIR for Combustion and Ventilation Draft Hood Spillage Test CombustionVentilation Determining FRESH-AIR Flow for Heater LocationVentilation Air from Outdoors Fresh AIR for15 to make sure fresh air ventilation is adequate Confined area has an air volume of less than 50 cubicFor Your Safety Read Before Lighting Operating HeaterLighting Instructions Viewing Pilot Shutting Off Heater Manual Lighting ProcedureBlower Operation To Turn OFF GAS to ApplianceInspecting Pilot and Burner Flame Pilot Flame PatternBurner Flame Pattern Correct Burner Flame Pattern Maintenance CleaningTurn off and unplug heater and let cool before servicing Trouble ShootingUnless you need gas supply for testing, shut off manual Shutoff valve before servicing. Only a qualified serviceTrouble Problem CauseTROUBLE- Shooting Observed Possible Problem Cause RemedyConnections, Statement at topRemoving Control Valve and Burner Tube Service ProceduresRemoving Burner Changing Burner Orifice WiringDiagram BlowerHints ServiceAccessories TechnicalParts Ordering ReplacementParts Under Warranty Parts Not Under WarrantyCabinet Assembly Illustrated Parts ListBurner Assembly Parts List Limited Warranty Vanguard Vented Propane GAS Heaters Warranty Information
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