Quadra-Fire CB1200 - Negative Pressure; Draft; Chimney and Exhaust Connection

16 7014-285C August 1, 2018
CB1200 Pellet Insert
C. Negative Pressure
Negative pressure results from the imbalance of air
available for the appliance to operate properly. It can be
strongest in lower levels of the house.
Causes include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustion air requirements for furnaces, water
appliances and other combustion appliances
• Clothes dryers
• Location of return-air vents to furnace or air
conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks such as:
- Recessed lighting
- Attic hatch
- Duct leaks
To minimize the e󰀨ects 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
WARNING
Risk of Asphyxiation!
Negative pressure can cause spillage of combustion
fumes and soot.
E. Chimney and Exhaust Connection
1. Chimney & Connector: Use 3 or 4 inch (76-102mm)
diameter type “L” or “PL” venting system. It can be vented
vertically or horizontally.
2. Mobile Home: Approved for all Listed pellet vent. If using
the 3 inch (76mm) vertical Top Vent Adapter Kit or the 3
to 6 inch (76-152mm) Top Vent O󰀨set Adapter, use Listed
double wall ue connector. A Quadra-Fire Outside Air Kit
must be used with manufactured home installations.
3. Residential: The 3 inch (76mm) vertical Top Vent
Adapter Kit and the 3 to 6 inch (76-152mm) Top Vent
O󰀨set Adapter are tested to use 24 gauge single wall ue
connector or Listed double wall ue connector to Class
A Listed metal chimneys, or masonry chimneys meeting
International Residential Code standards for solid fuel
appliances.
4. INSTALL VENT AT CLEARANCES SPECIFIED BY THE
VENT MANUFACTURER.
5. Secure exhaust venting system to the appliance with at
least 3 screws. Also secure all connector pipe joints with
at least 3 screws through each joint.
6. DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST
VENTING SYSTEM OF THIS Appliance.
7. DO NOT CONNECT THIS Appliance TO A CHIMNEY
FLUE SERVING ANOTHER APPLIANCE.
NOTE: All pipe must be welded seam pipe whenever
possible. Seal pipe joints with high temperature silicone
(500°F [260°C] minimum rated only).
NOTE: If burning shelled eld corn, you must use
approved venting specically designed for corn. Follow
the instructions from the venting manufacturer.
D. Draft
Draft is the pressure di󰀨erence needed to vent an
appliance 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
during lighting and die-down of the re.
Considerations for successful draft include:
• • Preventing negative pressure
• • Location of appliance and chimney
•
Notice: Hearth & Home Technologies assumes no
responsibility for the improper performance of the chimney
system caused by:
• Inadequate draft due to environmental conditions
• Down drafts
• Tight sealing construction of the structure
• Mechanical exhausting devices