U.S. Boiler Company PVG3, Installation, Operating And Service Instructions

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13
C.
Install Vent Pipe, U.S. Boiler Gasketed Vent System.
1. Procedure for Joining U.S. Boiler Gasketed Vent
Pipe and Fittings. See Figure 3.
a. Wipe the male end of each joint using an alcohol
pad to remove any dirt and grease.
b. Align weld seams in pipes and use a slight
twisting motion to FULLY insert male end into
female end of joint. Ensure bead in male end
of pipe is below locking band and rest against
the end of the female pipe. Verify the factory-
installed gasket is not dislodged or cut.
c. Tighten locking band by HAND with a 5/16”
nut driver until snug plus ¼ turn. DO NOT
SECURE JOINTS WITH SHEET METAL
SCREWS OR POP RIVETS. DO NOT
PUNCTURE THE VENT SYSTEM!
d. Once the installation is complete, operate
appliance and inspect all joints to ensure that flue
gases and/or liquid condensate will not escape.
D.
Separate Horizontal Venting System. See Figures 4A,
4B and 5. See Figure 28 for Blower Vent Connector
Assembly.
Vent Piping
–
1. This boiler is supplied with components as standard
equipment for installation of the separate horizontal
venting system.
Figure 3: U.S. Boiler Gasketed Vent Joint Detail
III. VENTING (continued)
2. Do not exceed maximum vent lengths. Refer to
Table 4.
3. Recommended horizontal installation consists
of vent being sloped down ¼ inch per foot away
from boiler. See Figure 4A. See Figure 4B for an
alternate horizontal installation.
4. Use appropriate designed thimbles when passing
through combustible walls (thimble use optional for
noncombustible walls). Insert thimble through wall
from outside. Secure outside flange to wall with
nails or screws, and seal ID, OD and vent holes with
sealant material. Install inside flange to inside wall,
secure with nails or screws, and seal with sealant
material.
5. For noncombustible wall application when thimble
is not used, size opening such that bell with locking
band attached cannot pass through.
6. Join vent terminal to vent pipe. See Figure 5.
7. Insert vent pipe through thimble/opening from
outside and join to vent system. Apply sealant
between vent pipe and opening/thimble to provide
weathertight seal and prevent entry of combustion
products into building.