HTP ELP-199 - Manual (Page 33)

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LP-294 REV. 2.20.14
E. EXHAUST VENT AND INTAKE PIPE SIZING
ALTITUDE CONSIDERATIONS
INSTALLATION ALTITUDE
TOTAL EQUIVALENT VENT LENGTH (TEL) ALL MODELS
3” VENT DIAMETER 4” INCREASED VENT DIAMETER 2” REDUCED VENT DIAMETER
LESS THAN 5000 FT. 250 ft. – All Models
275 ft. – All Models 100 ft. – ELP-110*
GREATER THAN 5000 FT.
250 ft. – ELP-110
200 ft. – ELP-199
Table 12 – Altitude Considerations and Vent Length - *DO NOT REDUCE VENT DIAMETER ON ELP-199 MODELS
1. The exhaust vent and intake pipes are 3” for the ELP-110 and ELP-199.
2. The total equivalent length of exhaust vent and intake pipe should not exceed those detailed in Table 12.
a. The equivalent length of friction loss in elbows, tees, and other fittings are listed in Table 13.
FRICTION LOSS EQUIVALENT FOR STAINLESS OR PLASTIC PIPING AND FITTINGS
FITTING DESCRIPTION 3” 4”
90
o
elbow short radius 5’ 5’
90 o elbow long radius 4’ 4’
45
o
elbow 3’ 3’
Coupling 0’ 0’
Tee (intake only) 0’ 0’
Concentric Vent Kit 3’ N/A
V Series Vent Kit 1’ 1’
AL20 4C Vent Terminal 1’ 1’
Pipe (All Materials) 1’ 1’
Table 13 *Friction loss for long radius elbow is 1’ less. NOTE: Consult Polypropylene venting instructions for friction loss and
pressure drop equivalents.
b. For example: If the exhaust vent is 3 ” in diameter, and has two
short 90
o
elbows and 10 feet of PVC pipe we will calculate: Exhaust
Vent Equivalent Length = (2x5) + 10 = 20 ft.
Further, if the 3 ” intake pipe has two short 90 o
elbows, one 45
o
elbow, and 10 feet of PVC pipe, the following calculation applies:
Intake Pipe Equivalent Length = (2x5) + 3 + 10 = 23 ft.
The Exhaust Vent Equivalent Length + Intake Pipe Equivalent
Length = Total Equivalent Length. In this example, the Total
Equivalent Length is 43 ft.
c. The minimum total equivalent length is 16 feet.
d. The size of venting on the ELP-110 can also be reduced in order to accommodate existing vent sizes. When reducing down
to a 2” vent from a 3” vent, the total equivalent length shall not exceed 100 equivalent feet. Vent reduction must begin at the
boiler.
Do not reduce vent diameter on the ELP-199. Doing so will result in improper boiler operation, boiler shutdown, and property damage.
Such damages ARE NOT covered by product warranty.
F. LONGER VENT RUNS
The maximum total equivalent length can be extended by equally increasing the diameter of both the exhaust vent and intake pipes.
However, the transitions should begin a minimum of 16 total equivalent feet from the boiler.
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.
Do not exceed the maximum lengths for increased diameter vent pipes. Excessive length could result in boiler shutdown and property
damage.
Figure 13 – Extended Run Detail