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VI
CTORY
II V
HS Models
CATEGORY II AND III VENTING
1. Vent Material
A) The vent system for horizontal or vertical venting
(Category II and III) must be UL listed single wall 3"
diameter AL29-4C
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stainless steel material. The follow-
ing manufacturers’ systems are approved for use within
a specified minimum and maximum equivalent vent
length for each model. Proper adapter must be used as
a connector between Victory
II boilers flue collar and
venting system as shown below:
Heat-Fab Part Numbers for various items of vent system are
listed in Slant/Fin Part List, Publication No. VHS-10PL.
B) When joining the various components of the above
listed vent systems, the manufacturers’ instructions
should be closely followed to insure proper sealing.
C) Use sealant specified by vent system manufacturer
for sealing of pipe and fittings. See Figure 4 for
proper application of vent pipe sealing for Safe-T vent
system by Heat-Fab. Inc.
D) All vent connections must be liquid and pressure tight
E) Flue vent system CANNOT be cut to length. Consult
manufacturer’s instructions. For Heat-Fab system, use
slip joint connector to adjust pipe lengths dimensions.
F) DO NOT use plastic or galvanized flue pipe.
2. Flue Length Restriction
Maximum and minimum equivalent flue length for different
s
ystems are given in the tables on page 6. Equivalent flue
length is sum of straight flue lengths and equivalent
length of elbows. The vent termination is in addition to the
a
llowed equivalent lengths.
Example: Boiler Model VHS-180 is to be installed at sea
level with 2 elbows using Heat-Fab vent system. Maximum
straight run would be: 40 - 2 x 3 = 34ft. If same boiler is to
be installed in Colorado Springs (5,980 ft. altitude), the maxi-
mum straight run would be: 20 - 2 x 3 = 14 ft.
3. Installation
A. Horizontal Venting:
Figures 5 and 6 show typical horizontal venting. For
combustible wall passage of vent piping a U.L. listed
thimble must be used. See Figures 5 and 6 for wall
thimble Part Numbers and more information.
B. Vertical Venting:
Figure 7 shows typical vertical venting. A fire stop is
required for each ceiling and floor penetration. An
existing chimney (see Figure 8) may be used as a
chase for vertical venting. Other appliances CANNOT
be vented into the same chimney or vent pipe within
the chimney.
For both, horizontal and vertical venting, the following
points MUST be followed:
A. All Victory
II boilers are equipped with a built-in con-
densation drain and trap. The trap loop must be filled
with water. DO NOT operate the boiler without filling
the trap with water to prevent flue gas discharge into
space. The drain should extend to a floor drain or to a
container which may require emptying periodically.
B. The horizontal vent pipe must be sloped upward from
the boiler at a pitch of at least 1/4" per 1 foot of run, so
that the condensate from the vent system runs to the
drain trap.
C. The horizontal vent pipes must be supported with pipe
straps at intervals no greater than indicated by vent
pipe manufacturer’s instructions. The vertical portion
vent pipe also must be supported per manufacturer’s
instructions.
D. Minimum clearances of vent pipes from combustible
constr
uctions must be maintained (see Page 3).
E. Common venting with other appliances or another Vic-
tory
II boiler is NOT allowed.
F. The vent piping must terminate with a screened elbow
or tee. See Figures 5 and 6 for horizontal and 7 and 8
for vertical termination information. A cap termination
may be used for vertical venting.
G. See Appendix A for vent system location and conden-
sation drain requirements.
H. For roof passage of vent piping a U.L. listed roof flash-
ing must be used.
Figure 4. Vent Sealing Instructions
(Consult vent manufacturer’s instructions.)
5
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: AL 29-4C is a registered trademark of Allegheny Ludlum Corp.
Manufacturer Type/System Adapter Part Sealant
No.
Heat-F
ab
.
Inc. Saf-T Vent Not Required RTV 106 or Dow
Corning 732
Heat-F
ab
. Inc. Saf-T Vent Not Required Not Required
EZ Seal
ProTech System, FasNSeal FSA-SLB-3 Not Required
Inc.
Fle
x-L StaR-34 SRASFA3 GE-1S806
International, Inc.
Z-Flex, Inc. Z-Vent O2SVSSLA2 GE, RTV 106