Navien NHB H Series, Инструкция по установке и эксплуатации

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81 Installing a Common Vent System
9.1.2 Determining the Length of a
Common Vent System
Follow the instructions listed below to determine
the length of a common vent.
1. Add the BTU/H input ratings for each unit in the
cascading system to determine the total BTU/H
rating.
2. Determine the total length (L) of the common
vent, which consists of the horizontal width (W)
and the vertical height (H): Total length (L) = W
+ H.
Exhaust
D
W
H
Intake
Siphon loop
Drain hose
Drain
2. Align the pipe with the pipe fitting and twist
the pipe a quarter turn as you insert it into the
fitting. Twisting the pipe spreads the solvent
cement evenly to ensure a solid joint.
3. Hold the pipe and pipe fitting together for
about 15 seconds until the cement sets.
Note
●
Use approved solvent type cement
for the proper vent materials.
●
Use solvent type cement only.
●
Check the date of manufacture
before using the cement. Ensure that
cement was not manufactured more
than 2 years prior to using it.
●
Ensure that the inside of the pipe
fitting and the outside of the pipe,
where cement will be applied, is
clean.
●
Apply an even layer of cement over
all mating surfaces.
●
Use primer in temperatures lower
than 32
℉
(0
℃
).
●
Use solvent cement in room
temperatures higher than 32
℉
(0
℃
).
●
Installing vent pipe with cement
in cold ambient temperatures can
result in longer cure times.
WARNING
Carbon Monoxide Hazard
To prevent serious injury or death:
●
NEVER apply force or impact to pipes after
making connections.
●
Excessive force might cause the pipe or fitting
to leak harmful gas.