34
LP- 293 REV. 9.2.14
The maximum equivalent length for increased diameter vent pipes is 275 ft, which includes the 16 ft from the boiler with a transition
total of 259 ft upsize piping for longer vent runs.
VENT TRANSITION FITTING
SIZE
REDUCING COUPLING
FINAL VENT SIZE
3” Venting
4” x 3”
4”
4” Venting
6” x 4”
6”
6” Venting
8” x 6”
8”
Table 11
Do not exceed the maximum lengths for increased diameter vent pipes. Excessive length could result in appliance shutdown and
property damage.
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 carbon monoxide leakage, property damage, severe personal injury, or death.
1. Use only solid PVC or CPVC pipe, or a 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 12 lists optional exhaust/intake terminations available from HTP:
Summary of Contents for EL-110
Page 13: ...13 LP 293 REV 9 2 14 Figure 3 LP 285 B ...
Page 51: ...51 LP 293 REV 9 2 14 Figure 29 Cascade Master and Follower ...
Page 52: ...52 LP 293 REV 9 2 14 Figure 30 ...
Page 53: ...53 LP 293 REV 9 2 14 Figure 31 ...
Page 54: ...54 LP 293 REV 9 2 14 Figure 32 ...
Page 77: ...77 LP 293 REV 9 2 14 Figure 36 ...
Page 78: ...78 LP 293 REV 9 2 14 Figure 37 ...
Page 79: ...79 LP 293 REV 9 2 14 Figure 38 LP 293 A ...
Page 82: ...82 LP 293 REV 9 2 14 ...
Page 83: ...83 LP 293 REV 9 2 14 ...
