HTP ELP-199 - Manual (Page 34)

34
LP-294 REV. 2.20.14
VENT TRANSITION FITTING
SIZE REDUCING COUPLING FINAL VENT SIZE
3” Venting 4” x 3” 4”
Table 14
G. EXHAUST VENT AND INTAKE PIPE INSTALLATION
All joints of positive pressure vent systems must be sealed completely to prevent leakage of flue products into living space. Failure to
do so could result in property damage, severe personal injury, or death.
1. Use only solid PVC or CPVC pipe, or a Stainless Steel or Polypropylene vent system, approved for use with Category IV boilers.
FOAM CORE PIPING IS NOT APPROVED FOR EXHAUST APPLICATIONS. Foam core piping may be used on air inlet piping only.
2. Remove all burrs and debris from joints and fittings.
3. When using PVC or CPVC pipe, all joints must be properly cleaned, primed, and cemented. Use only cement and primer approved
for use with the pipe material. Cement must conform to ASTM D2564 for PVC and ASTM F493 for CPVC pipe. NOTE: DO NOT
CEMENT POLYPROPYLENE PIPE.
4. Ensure the vent is located where it will not be exposed to prevailing winds.
5. In all roof venting applications, exhaust discharge must point away from the pitch of the roof.
6. To prevent water leakage, install adequate roof flashing where the pipe enters the roof.
7. Do not locate vent over public walkways, driveways, or parking lots. Condensate could drip and freeze, resulting in a slip hazard or
damage to vehicles and machinery.
8. Due to potential moisture build-up, sidewall venting may not be the preferred venting option. To save time and cost, carefully
consider venting installation and location.
9. Horizontal lengths of exhaust vent must slope back towards the appliance not less than ¼" per foot to allow condensate to drain from
the vent pipe.
10. The exhaust vent must terminate where vapors cannot make accidental contact with people or pets, or damage shrubs or plants.
11. In vacant chimney applications, install and seal a rain cap over existing chimney openings.
12. All piping must be fully supported. Use pipe hangers at a minimum of 4 foot intervals to prevent sagging of the pipe where
condensate may form.
13. Do not use the appliance to support any piping.
14. A screened straight coupling is provided with the appliance for use as an outside exhaust termination.
15. A screened inlet air tee is provided with the appliance to be used as an outside intake termination.
The following information on Table 15 lists optional exhaust/intake terminations available from HTP:
DESCRIPTION STOCK CODE
3” PVC CONCENTRIC VENT TERMINATION KIT KGAVT0601CVT
3” STAINLESS STEEL VENT TERMINATION KIT V1000
4” STAINLESS STEEL VENT TERMINATION KIT V2000
3” POLYPRO VENT KIT 8400P-001
Table 15