Install Instructions

10
6. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers and
any other gas burning appliance to their previous
conditions of use.
7. Any improper operation of the common venting
system should be corrected so the installation
conforms with the National Fuel Gas Code, NFPA
54/ANSI Z223.1. When resizing any portion of the
common venting system, the common venting
system should be resized to approach the minimum
size as determined in the National Fuel Gas Code,
NFPA 54/ANSI Z223.1.
C. Install Vent Connector.
1. Remove vent connector from vent accessory carton.
2. Remove gaskets, orifice plate and hardware from
blower outlet flange.
3. Assemble orifice plate gaskets, orifice plate, and
vent connector. See Figure 3.
4. Secure vent connector with washers and locknuts.
3. Provide and maintain vent pipe minimum clearance
to combustible materials. Vent pipe minimum
clearance to combustible material is five (5)
inches when vent is installed in a fully enclosed
(chase) application or four (4) inches when vent is
installed with at least one side open, similar to a
joist bay application. Use thimble when penetrating
combustible wall.
a. PVCG30 and PVCG40 – Single wall thimble,
Factory Part No. 8116116. Other wall thimble
manufacturers are American Metal Products,
Hart & Cooley, and Metal Fab.
b. PVCG50 and PVCG60 – Double wall thimble,
Factory Part No. 8116115 (accommodates 5
inch to 8-3/4 inch wall thickness). Another wall
thimble manufacturer is Hart & Cooley.
4. Once a vent pipe manufacturer and system is chosen
never mix and match vent systems.
5. If a non-standard length pipe is required:
Gasketed Vent System: The use of the adjustable
length pipe (P/N 8116319U) is recommended to
complete a non-standard pipe length. This pipe
requires a minimum installed length of 12¾ inch
and can adjust across a 7 inch gap up to a maximum
of 19¾ inch long. (Note for the adjustable pipe
the installed length should be measured from the
centerline of the bead on the male end of the first
pipe to the end of the female pipe excluding the
locking band of the second pipe with a single
gasket.) Only in the event the adjustable length pipe
is not sufficient a standard length pipe may be cut
using the procedure outlined below for the Gasket-
Less Vent System.
WARNING
Never exceed maximum installed length of 19¾
inches for adjustable length pipe.
Risk of ue gas leakage is possible.
Gasket-Less Vent System: Carefully cut pipe to
length using a hacksaw with minimum 32 teeth
per inch or circular saw with metal abrasive wheel.
Remove male (bead) end only – female (bell) end
accepts next fitting or pipe.
NOTICE
Cut must be square with pipe and led or
sanded smooth before joining. Carefully ensure
roundness of cut pipe by hand with gloves before
installing. Seal joint with RTV specied in this
manual.
6. Seal all Gasket-Less vent, mixed vent (Gasket-
Less and Gasketed) and field cut joints using Dow
Corning Silastic 732 RTV, Dow Corning Silastic
736 RTV, GE RTV106, Polybac #500 RTV, Sil-
Figure 3: Vent Connector Installation
D. Install Vent Pipe, General.
1. Plan venting system to avoid possible contact with
plumbing or electrical wires. Start venting system at
vent connector and work toward the vent terminal.
2. Use non-combustible ¾ inch pipe strap to support
horizontal runs, maintain vent location and slope,
while preventing sags in pipe. Do not restrict
thermal expansion or movement of vent system.
Maximum support spacing is 5 feet. Do not
penetrate any part of the vent system with fasteners.