Quadra-Fire 7068-112 owner manual Negative Pressure, Draft, Vent Configurations

Castile & Santa Fe CE Pellet Stove

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Vent Configurations

To reduce probability of reverse drafting during shut-down conditions Hearth & Home Technologies strongly recom- mends:

•Installing the pellet vent with a minimum vertical run of 1.52m. Preferably terminating above the roof line.

•Installing the outside air kit at least 1.22m below the vent termination.

To prevent soot damage to exterior walls of the house and to prevent re-entry of soot or ash into the house:

•Maintain specified clearances to windows, doors and air inlets, including air conditioners.

•Vents should not be placed below ventilated soffits. Run the vent above the roof.

•Avoid venting into alcove locations.

•Vents should not terminate under overhangs, decks or onto covered porches.

•Maintain minimum clearance of 152mm from the vent termination to the exterior wall. If you see deposits developing on the wall, you may need to extend this distance to accommodate your installation conditions.

C.Negative Pressure

WARNING! Risk of Asphyxiation! Negative pressure can cause spillage of combustion fumes and soot.

Negative pressure results from the imbalance of air avail- able for the appliance to operate properly. It can be stron- gest in lower levels of the house.

Causes include:

•Exhaust fans (kitchen, bath, etc.)

•Range hoods

•Combustion air requirements for furnaces, water heaters and other combustion appliances

•Clothes dryers

•Location of return-air vents to furnace or air conditioning

•Imbalances of the heating/cooling air handling system

•Upper level air leaks such as:

-Recessed lighting

-Attic hatch

-Duct leaks

To minimize the effects of negative air pressure:

•Install the outside air kit with the intake facing prevailing winds during the heating season

•Ensure adequate outdoor air for all combustion appliances and exhaust equipment

•Ensure furnace and air conditioning return vents are not located in the immediate vicinity of the appliance

•Avoid installing the appliance near doors, walkways or small isolated spaces

•Recessed lighting should be a “sealed can” design

•Attic hatches weather stripped or sealed

•Attic mounted duct work and air handler joints and seams taped or sealed

On nominal heat output the combustion blower operates at 2053 rpm developing 0.33 m^3/s. This is the minimum require- ment for the supply of combustion air.

D. Draft

Draft is the pressure difference needed to vent appliances successfully. When an appliance is drafting successfully, all combustion byproducts are exiting the home through the chimney.

Install through the warm airspace enclosed by the building envelope. This helps to produce more draft, especially dur- ing lighting and die-down of the fire.

Considerations for successful draft include:

•Preventing negative pressure

•Location of appliance and chimney

To measure the draft or negative pressure on your appliance use a magnahelic or a digital pressure gauge capable of reading 0 - .13mm of water column (W.C.).

The appliance should be running on high for at least 15 minutes for the test.

With the stove running on high you should have a negative pressure equal to or greater than the number given in the chart below. If you have a lower reading than you find on the chart, your appliance does not have adequate draft to burn the fuel properly.

Minimum Vacuum Requirements: .095

NOTICE: Hearth & Home Technologies assumes no responsibility for the improper performance of the chimney system caused by:

•Inadequate draft due to environmental conditions

•Downdrafts

•Tight sealing construction of the structure

•Mechanical exhausting devices

August 19, 2011 7068-112 Page 23