Lochinvar KNIGHT XL 801 - Manual (Page 18)

18
3
General venting
6. Priming and Cementing:
a. Handle fi ttings and pipes carefully to prevent
contamination of surfaces.
b. Apply a liberal even coat of primer to the fi tting
socket.
c. Apply a liberal even coat of primer to the pipe end to
approximately 1/2" beyond the socket depth.
d. Apply a second primer coat to the fi tting socket.
e. While primer is still wet, apply an even coat of
approved cement to the pipe equal to the depth of
the fi tting socket.
f. While primer is still wet, apply an even coat of
approved cement to the fi tting socket.
g. Apply a second coat of cement to the pipe.
h. While the cement is still wet, insert the pipe into the
fi tting, if possible twist the pipe a 1/4 turn as you insert
it. NOTE: If voids are present, suffi cient cement was
not applied and joint could be defective.
j. Wipe excess cement from the joint removing ring or
beads as it will needlessly soften the pipe.
Table 3A Vent Pipe, and Fittings
PVC/CPVC air intake/vent connections
1. Combustion Air Intake Connector (FIG.’s 3-9 and 3-10) - Used to provide combustion air directly to the unit from
outdoors. A fi tting is provided on the unit for fi nal connection. Combustion air piping must be supported per guidelines
listed in the National Mechanical Code, Section 305, Table 305.4 or as local codes dictate.
2. Vent Connector (FIG.’s 3-9 and 3-10) - Used to provide a passageway for conveying combustion gases to the outside.
Transition
fi ttings are provided with the unit for fi nal connection. Vent piping must be supported per the National Building
Code, Section 305, Table 305.4 or as local codes dictate.
6” COUPLING
(FIELD SUPPLIED)
6” CPVC
STARTER
PIECE
(FACTORY SUPPLIED)
VENT
AIR
THE 6” STAINLESS STEEL ADAPTER SUPPLIED
WITH THE BOILER MUST BE USED FOR VENT
CONNECTION TO PVC/CPVC. THE 6” CPVC
STARTER PIECE MUST BE USED FOR PVC ONLY.
Figure 3-10 Near Boiler PVC/CPVC Venting - Models
701 - 801
VENT
AIR
4" CPVC PIPE SUPPLIED WITH
BOILER MUST BE USED FOR VENT CONNECTION
NOTE: CPVC VENT OR STAINLESS STEEL PIPE AND
VENT FITTINGS MUST BE USED IN CLOSET AND
ALCOVE INSTALLATIONS.
*
* 4” CPVC STREET ELBOW
MAY BE SUBSTITUTED
Figure 3-9 Near Boiler PVC/CPVC Venting - Models 400 - 601
*Use of FasNSeal Flex smooth inner wall vent is to be used in vertical or near vertical sections only, taking precaution to ensure
no sagging occurs of the vent system. Connect to the FasNSeal rigid vent using specially designed adapters and sealing method,
see manufacturer’s instructions.
Installation & Operation Manual
All vent pipe materials and fi ttings must comply with the following:
Item Material
Standards for installation in:
United States Canada
Vent pipe and
fi ttings
PVC Plastic Pipe, Schedules 40, 80, & 120 ANSI/ASTM D1785
CPVC and PVC venting must be ULC-S636
Certifi ed. IPEX is an approved manufacturer
in Canada supplying vent material listed to
ULC-S636.
PVC Plastic Pipe Fittings, Schedule 40 ANSI/ASTM D2466
PVC Plastic Pipe Fittings, Schedule 80 ANSI/ASTM D2467
PVC - DWV Pipe and Fittings ANSI/ASTM D2665
CPVC Plastic Pipe, Schedule 40 & 80 ANSI/ASTM F441
CPVC Plastic Pipe Fittings, Schedule 80 ANSI/ASTM F439
AL29-4C UL1738 ULC-S636
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
Approved Stainless Steel Vent Manufacturers
Make Model
ProTech Systems (Simpson Dura-Vent Co.) FasNSeal Vent / FasNSeal Flex* Vent
Z-Flex (Nova Flex Group) Z-Vent
Heat Fab (Selkirk Corporation) Saf-T Vent