33
LP- 446 REV. 9.3.14
3. NEVER install condensate lines outside. It is very important that the condensate line is not exposed to freezing temperatures or any type of
blockage. Damages due to frozen or blocked condensate lines ARE NOT covered by warranty.
4. Support of the condensate line may be necessary to avoid blockage of the condensate flow.
The condensate line must remain unobstructed, allowing free flow of condensate. If condensate freezes in the line, or if line is
obstructed in any other manner, condensate can exit from boiler tee, resulting in potential water damage to property.
When installing a condensate pump, select one approved for use with condensing boilers and furnaces. The pump should have an
overflow switch to prevent property damage from condensate spillage.
E. EXHAUST VENT AND INTAKE PIPE SIZING
1. The exhaust vent and intake pipe
are 4” for the Mod Con 500 and 6” for the Mod Con 850.
2. The total equivalent length of exhaust vent and intake pipe should not exceed 200 feet.
a. The equivalent length of friction loss in elbows, tees, and other fittings are listed in Table 12.
FRICTION LOSS EQUIVALENT FOR STAINLESS OR PLASTIC PIPING AND FITTINGS
FITTING DESCRIPTION
4”
6”
8”
90
o
elbow short radius
3’
3’
3’
90
o
elbow long radius
2’
2’
2’
45
o
elbow
1’
1’
1’
Coupling
0’
0’
0’
Tee (intake only)
0’
0’
0’
V Series Vent Kit
1’
1’
1’
AL20 4C Vent Terminal
1’
1’
1’
Pipe (All Materials)
1’
1’
1’
Table 12
– Friction Loss in Equivalent Feet - *Friction loss for long radius elbow is 1’ less.
b. For example: If the exhaust vent has two short 90
o
elbows and 10 feet of PVC pipe we will calculate: Exhaust Vent
Equivalent Length = (2x3) + 10 = 16 feet.
Further, if the 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 = (2x3) + 1 + 10 = 17 feet.
Therefore, total equivalent length equals 33 feet.
c. The exhaust vent and intake pipe are intended to penetrate the same
wall or roof of the building.
d. The minimum total equivalent length is 16 feet.
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 transition total
of 259 ft upsize piping for longer vent runs.
VENT TRANSITION FITTING
SIZE
REDUCING COUPLING
FINAL VENT SIZE
4” Venting
6” x 4”
6”
6” Venting
8” x 6”
8”
Table 13
– Vent Transition Fitting
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.
Figure 15
Содержание 500 HL
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Страница 21: ...21 LP 446 REV 9 3 14 H PIPING DIAGRAMS Figure 6 ...
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Страница 52: ...52 LP 446 REV 9 3 14 Figure 33 Mod Con Internal Connection Diagram LP 428 K ...
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