Crown Boiler PHNTM399, Инструкция по установке и эксплуатации

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IV. Venting
B. CPVC/PVC Venting (continued)
b. Install provided Schedule 40 x 30 in. (760 mm)
long CPVC pipe into the vent section of the
connector with a slight twisting motion and
secure by tightening the worm band clamp screw.
c. All CPVC vent components supplied with boiler
inside vent carton [Schedule 40 x 30 in. (760
mm) long CPVC pipe and Schedule 80 CPVC
90° Elbow] must be used for near-boiler piping
before transitioning to Schedule 40 PVC (ASTM
2665) pipe components for remainder of vent
system. The 30 in. (760 mm) long CPVC straight
pipe may be cut to accommodate desired vent
configuration provided both pieces are used
in conjunction with CPVC 90° Elbow before
any PVC components are used. Ensure that the
CPVC 90° Elbow is the first elbow used in the
vent system as it exits the boiler.
d. Insert Schedule 40 PVC combustion air pipe
(installer provided) into the combustion air
section of the connector with a slight twisting
motion and secure by tightening the worm band
clamp screw.
e. Clean all vent and combustion air pipe joints
with primer and secure with cement. Use a field
supplied cement and primer that is listed for use
with the materials being joined (CPVC and/or
PVC). The following, or its equivalent, may be
used to join CPVC to PVC:
• IPS Corporation #P-70 Primer
• IPS Corporation #790 Multi-Purpose
Solvent Cement.
Always use primer on both the pipe and fitting
before applying the cement. Assemble the pipe
in accordance with the instructions on the cans of
primer and cement.
Figure 10: Near-Boiler Vent/Combustion Air Piping
4. System Assembly
WARNING
Asphyxiation Hazard. CPVC/PVC vent piping and
fittings rely on glued joints for proper sealing.
Follow all manufacturer instructions and
warnings when preparing pipe ends for joining
and using the primer and the cement.
a. Plan venting system to avoid possible contact
with plumbing or electrical wires. Start at
vent connector at boiler and work towards vent
termination.
b. Design the vent system to allow 3/8 in.
(9.5 mm) of thermal expansion per 10 ft. (3.0 m)
of CPVC/PVC pipe. Runs of 20 ft. (6.1 m) or
longer that are restrained at both ends must use
an offset or expansion loop. Refer to Figure 11
and Table 8.
c. All CPVC/PVC vent and combustion air
pipe joints must be cleaned with primer and
glued with cement. Follow all manufacturer
instructions and warnings when preparing pipe
ends for joining and using the primer and the
cement.
5. Horizontal Sidewall Termination
a. Standard Two-Pipe Termination
See Figure 5.
i. Vent Piping
Running PVC vent pipe inside Enclosures
and through Walls:
• PVC vent pipe must be installed in such
way as to permit adequate air circulation
around the outside of the pipe to prevent
internal wall temperature rising above
ANSI Z21.13 standard specified limit.