Pvc/Cpvc - Lochinvar Shield SWR125 Installation & Service Manual

2
General venting

PVC/CPVC

This product has been approved for use with the PVC/CPVC
vent materials listed in Table 2C.
Installing vent and air piping
The vent connection to the appliance must
⚠ WARNING
be made with the starter CPVC pipe section
provided with the 285-500 models (starter
piece is factory installed on the 125-200
models) if PVC/CPVC vent is to be used.
The field provided vent fittings must be
cemented to the CPVC pipe section using
an "All Purpose Cement" suitable for PVC
and CPVC pipe. Use only the vent materials,
primer, and cement specified in Table 2C to
make the vent connections. Failure to follow
this warning could result in fire, personal
injury, or death.
Use only cleaners, primers, and solvents that
NOTICE
are approved for the materials which are
joined together.
All CPVC and PVC vent pipes must be glued,
NOTICE
properly supported, and the exhaust must be
pitched a minimum of a 1/4 inch per foot
back to the water heater (to allow drainage
of condensate). Horizontal runs shall have
supports suitable for non-metallic vent
piping that do not clamp tightly onto vent,
allowing for vent expansion or contraction.
Supports shall be as close to joints and fittings
as practical and no more than 5 feet apart.
Insulation shall not be used on PVC or CPVC
⚠ WARNING
venting materials.
will cause increased vent wall temperatures,
which could result in vent pipe failure.
When available, follow all vent manufacturer's
NOTICE
installation instructions.
Table 2C PVC/CPVC Vent Pipe, and Fittings
Approved PVC/CPVC Vent Pipe and Fittings
Item Material
PVC Schedule 40, 80
Vent pipe
PVC - DWV
CPVC Schedule 40, 80
PVC Schedule 40
PVC Schedule 80
Vent fittings
CPVC Schedule 80
PVC - DWV
Pipe Cement
PVC
/ Primer
CPVC
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
NOTE: In Canada, CPVC and PVC vent pipe, fittings and cement/
primer must be ULC-S636 certified.
20
The use of insulation
Standard
ANSI/ASTM D1785
ANSI/ASTM D2665
ANSI/ASTM F441
ANSI/ASTM D2466
ANSI/ASTM D2467
ANSI/ASTM F439
ANSI/ASTM D2665
ANSI/ASTM D2564
ANSI/ASTM F493
Installation & Service Manual
1. Work from the water heater to vent or air termination.
Do not exceed the lengths given in this manual for the
air or vent piping.
2. Cut pipe to the required lengths and deburr the inside
and outside of the pipe ends.
3. Chamfer outside of each pipe end to ensure even
cement distribution when joining.
4. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will
prevent adhesion.)
5. Dry fit vent or air piping to ensure proper fit up before
assembling any joint. The pipe should go a third to
two-thirds into the fitting to ensure proper sealing after
cement is applied.
6. Priming and Cementing:
a. Handle fittings and pipes carefully to prevent
contamination of surfaces.
b. Apply a liberal even coat of primer to the fitting
socket and to the pipe end to approximately 1/2"
beyond the socket depth.
c. Apply a second primer coat to the fitting socket.
d. While primer is still wet, apply an even coat of
approved cement to the pipe equal to the depth of
the fitting socket along with an even coat of
approved cement to the fitting socket.
e. Apply a second coat of cement to the pipe.
f. While the cement is still wet, insert the pipe into
the fitting, if possible twist the pipe a 1/4 turn as
you insert it. NOTE:
sufficient cement was not applied and joint could
be defective.
g. Wipe excess cement from the joint removing ring
or beads as it will needlessly soften the pipe.
Figure 2-7 Near Water Heater PVC/CPVC Venting
VENT
CPVC STARTER PIECE
(FACTORY INSTALLED)
MODELS 125 - 200
If voids are present,
CPVC STARTER PIECE
(FACTORY SUPPLIED)
MODELS 285 - 500
DIR #2000586184