HTP Flexible Vent Kit - Manual (Page 2)

2
• Do not mix pipe, fittings, or joining methods from different manufacturers with this flexible vent kit.
• Do not use adhesives of any kind with this venting system. Use only approved fittings.
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only
trained service personnel should install or service heating equipment.
This installation shall be done by a qualified service agency in accordance with these instructions, all
applicable codes, and requirements of the authority having jurisdiction. If the information in these
instructions is not followed exactly, property damage, personal injury, or death may result.
When working on heating equipment, observe all precautions in the literature, on tags, and on labels
attached to the appliance. Follow all safety codes. Wear safety glasses and work gloves. Have a fire
extinguisher available.
Before beginning any installation or modification, be sure the main electrical disconnect switch is in the
“OFF” position. Electrical shock can cause serious personal injury or death.
This vent kit may be used in residential or commercial installations to terminate Category II or IV gas-
burning appliances ONLY. Failure to follow this warning will result in fire, serious personal injury, or death.
A. APPLICATION
The maximum positive pressure of the flexible vent kit is 8” w.c. The maximum flue gas temperature of
the appliance must be not more than 230
o
F (110
o
C) (ULC-S636-Class IIC). This vent kit must only be
used in vertical system designs. An existing chimney or chase must be used to route the flexible venting
system. To prevent condensate from pooling in the vent, flex pipe is not to bend more than 45
o
.
Terminating the vent pipe or air inlet with an elbow or tee is expressly prohibited when using the flexible
vent kit.
B. PRESSURE DROPS
Refer to the appliance manufacturer’s installation instructions for information about maximum venting
length, pressure drops, and equivalent length of the fittings. Use the guidelines below to adjust the
recommended vent lengths for the polypropylene venting system.
• The 3” (80 mm) Polypro Flex Kit (8400P-001) has a total equivalent length (TEL) of 14’ (4.26 m)
for the entire kit.
• It is important to measure the amount of flexible pipe used, as the resistance is 25% greater than
standard pipe. For example: Standard PVC/CPVC 3” (80mm) pipe resistance is equal to 1’. 3” (80
mm) Flexible Polypro Venting (8400-002/8400-003) pipe resistance is equal to 1.25’ (380 mm).
C. MINIMUM CLEARANCE TO COMBUSTIBLES
The following table indicates the minimum clearance to combustible materials. It is prohibited to place any
type of insulation around the venting system within these clearances.
SYSTEM CLEARANCE TO COMBUSTIBLES, HORIZONTAL OR VERTICAL INCH (mm)
Flexible Vent System 1.2 (30)
Table 1