Northern Tool And Equipment QCPS?28000 Owner's Manual - Warning
7
INSTALLATION
If outside air is not used, it is important that combustion air be easily available to the air inlet. An air
register that can be opened should be used in tightly insulated homes.
VENTING
This unit is certified for use with UL certified/ Listed 76 mm (3 in) or 101 mm (4 in) diameter in size. This
unit can be vented in an existing chimney with the addition of a liner if the chimney is more than 101
mm (4 in) in diameter. Refer to the instructions provided by the vent or chimney manufacturer,
especially when passing through a wall, ceiling or roof.
This is a pressurized exhaust system. All vent connector joints must be sealed with 500F (260C) RTV
silicone sealant to ensure consistent performance and avoid smoke and ash spillage. All horizontal
connector joints must be sealed with UL181AP foil tape. We recommend that all vertical vent connector
joints be secured with a minimum of 3 screws.
EQUIVALENT VENT LENGTH
The longer the run of pipe in your installation, the more restriction there is in the system. Therefore
larger diameter pipe should be used for longer runs.
Use 76.2 mm (3 in) pipe if you have less than 4.57 m (15 ft) of Equivalent Vent Length (EVL).
To calculate EVL, use the following conversion table:
Qty
Type of Pipe
EVL (ft)
1 90 degree elbow or “T”
5
1 45 degree elbow
3
1ft
Horizontal pipe run
1
1ft
Vertical pipe run
0.5
Example: (3 x 1.22 m [4ft] of vertical length = 3.66 m [12 ft] x 0.5 = 6 EVL) + (1 x elbow or “T” = 5 EVL) +
(2 x 0.3 m [1 ft] of horizontal length = 2 EVL)
Total EVL = 13. So 76.2 mm (3 in) diameter vent is allowed.
WARNING
• Do not install in a bedroom.
CAUTION
• Do not connect this unit to a chimney flue serving another appliance.
• Do not install a flue damper in the venting system of this unit.
• Install vent at clearances specified by the vent manufacture.
• The structural integrity of the manufactured home floor, wall, ceiling, roof must be maintained.