39
When servicing is complete, you must make sure this cap is replaced securely. Failure to do so will cause venting
issues that will result in serious injury or death.
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.
It is very important that the condensate piping be no smaller than ¾”. You must use a tee at the condensate
connection with a branch vertically up and open to the atmosphere, so as not to cause a vacuum that could
obstruct the flow of condensate from the boiler. To prevent sagging and maintain pitch, condensate piping should
be supported with pipe supports.
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 the tee, resulting in potential water
damage to property.
NOTE:
To allow for proper drainage on larger horizontal condensate runs, tubing size may need to increase to 1
inch and a second line vent may be required.
E. EXHAUST VENT AND INTAKE AIR VENT SIZING
1. The exhaust vent and intake air vent pipes are 3” for the Elite EL-80/110/155/220 and 4” for the EL-299/399.
2. The total combined equivalent length of exhaust vent and intake air pipe should not exceed 200 feet.
a. The equivalent length of friction loss in elbows, tees, and other fittings are listed in Table 9.
FRICTION LOSS EQUIVALENT FOR STAINLESS OR PLASTIC PIPING AND FITTINGS
FITTING DESCRIPTION
3”
4”
6”
90
o
elbow short radius
5’
5’
3’
90
o
elbow long radius
4’
4’
3’
45
o
elbow
3’
3’
2’
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 9
*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 Pipe Equivalent Length
= (2x5) + 10 = 20 feet.
Further, if the
3” intake air vent pipe has two short 90
o
elbows, one 45
o
elbow, and 10 feet of PVC pipe, the
following calculation applies: Intake Air Equivalent
Length = (2x5) + 3 + 10 = 23 feet.
Therefore, the total equivalent length equals 43 feet.
Figure 13
Summary of Contents for EL-110
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