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Intake / Fittings
EX 400, EX 500
EX 700, EX 850
4-inch rigid pipe
170 ft max. each side
Not allowed
6-inch rigid pipe
n/a
120 ft max. (See note below)
90° vent elbow
allow 5 ft for each elbow
45° elbow
allow 8 ft for each elbow
PPs 87-90° elbows
allow 3 ft for each elbow
Table 6
Maximum intake pipe venting length for EX 400, 500, 700, and 850
Note
You must use a reducer to connect 6" vent piping to the 4" vent collar. See
.
For the inlet air – Schedule 40 PVC, CPVC, ABS, PPs or SS piping of any type is permitted.
Note
Unused intake travel cannot be added to the exhaust. Unequal intake and exhaust piping
is allowed.
Ensure that adequate separation is maintained between the air intake inlet and the vent terminal.
Refer to the vent terminal configuration drawings in the Vent Termination section above.
Use support for intake piping, particularly for horizontal runs (follow local codes).
3.5.9 Indoor air combustion air intake
An “Indoor Combustion Air installation” can be described as air for combustion that is taken from the
air surrounding the boiler.
Warning
When using indoor air options, supply adequate combustion air to the boiler room
according to the requirements of all applicable codes.
35
3.5.9 Indoor air combustion air intake
Summary of Contents for EX Series
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Page 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...
Page 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...
Page 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...
Page 124: ...Figure 76 Sequence of Operation 122 Section Appendices...
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Page 128: ...126 Boiler parts diagram EX 400 and EX 500...