Crown Boiler PHNTM399, Инструкция по установке и эксплуатации

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Figure 11: CPVC/PVC Expansion Loop and Offset
IV. Venting
B. CPVC/PVC Venting (continued)
• Do not enclose PVC venting. Use higher
temperature rated CPVC pipe in enclosed
spaces or to penetrate combustible or
non-combustible walls.
• PVC vent pipe may not be used
to penetrate combustible or non-
combustible walls unless all following
three conditions are met simultaneously
(see Figure 12):
- The wall penetration is at least 66
in. (1680 mm) from the boiler as
measured along the vent
- The wall is 12 in. (300 mm) thick or
less
- An air space of at least of that shown
in Figure 12 is maintained around
outside of the vent pipe to provide
air circulation
• If above three conditions cannot be met
simultaneously, use CPVC for the wall
penetration.
• Size and cut wall opening such taht a
minimal clearance is obtained and to
allow easy insertion of vent pipe.
• Apply sealant between vent pipe and wall
opening to provide weather-tight seal.
Sealant should not restrain the expansion
of the vent pipe.
• Install contractor provided optional trim
plate on wall outside surface to cover
wall opening (see Figure 12).
• Secure trim plate to wall with nails or
screws and seal ID and plate OD or
perimeter with sealant material.
• When thimble is not used for non-
combustible wall, size and cut wall
opening such that a minimal clearance is
obtained and to allow easy insertion of
vent pipe.
• Install rodent screen and vent terminal
(supplied with boiler). See Figure 13 for
appropriate configuration details.
Figure 12: Wall Penetration Clearances
for PVC Vent Pipe
Table 8: Expansion Loop Lengths
Nominal
Pipe
Dia. (In.)
Length of
Straight Run
Loop Length
“L”
ft. m in. mm
4
20 6.1 60 1520
30 9.1 74 1880
40 12 85 2159
50 15 95 2413
60 18 104 2642