Vent Travel - IBC SL 20-160 G3 Installation And Operating Instructions Manual

WARNING
Do not mix venting materials
from different Manufacturers.
These venting materials are
designed to be installed as part
of a complete system.
Failure to comply may result in
severe personal injury or death.
EXHAUST PIPE SIZE
Sched.40; Rigid PPs
2"
3"
90° vent elbow
90° long sweep elbow
45° elbow
PPs 87-90° elbows
2" Stainless Sidewall Terminal
IBC P/N 180-148 (P-256)
3" Stainless Sidewall Terminal
IBC P/N 180-149 (P-257)
Flexible PPs
3" Flexible
WARNING
Fully insert the approved venting
material into the boilers exhaust
outlet and tighten clamp to ensure
the venting connection is locked
in place.
INSTALLATION
SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS

1.4.3 Vent Travel

PVC, CPVC or PPs (Rigid Single Wall) piping is the standard venting option; the SL
14-115 G3 boiler, for example, can be sited up to 100 equivalent feet from the vent
termination using 2" or up to 240' using 3". The actual vent travel allowance is reduced for
fittings in accordance with Table 3. – e.g. for an SL 14-115 G3 using 6 x 90º CPVC elbows,
the maximum lineal measure of pipe allowed using 2" pipe is 52 feet (100' – (6 x 8' = 48) =
52'). The same boiler using 3" pipe can have up to 192 feet (240' – (6 x 8' = 48) = 192').
For 3" Flexible PPs, up to 45 actual lineal feet are allowed in a nominally vertical
orientation (>45°). The equivalent length of 3" Flex PPs shall be computed using a multiple
of 1.2:1, e.g. 45' x 1.2 = 54' equiv. PPs 87-90° elbows are considered to be equivalent to
8'.
SL 10-85 G3 SL 14-115 G3
100' 100'
240' 240'
allow 8' equivalent allow 8' equivalent
allow 5' equivalent allow 5' equivalent
allow 3' equivalent allow 3' equivalent
use 8' equivalent use 8' equivalent
allow 20' equivalent of 2" allow 20' equivalent of 2"
Sched. 40 Sched. 40
allow 20' equivalent of 3" allow 20' equivalent of 3"
Sched. 40 Sched. 40
45' (max.) actual lineal x 45' (max.) actual lineal x
1.2 = equivalent 1.2 = equivalent
Table 3: Maximum exhaust venting length.
Note: Unused intake travel cannot be added to the exhaust. Unequal intake and exhaust
piping is allowed (see Section 1.4.8).
Exhaust venting must slope down towards the boiler with a pitch of at least 1/4" per foot
(PPs vent: follow PPs manufacturer requirements) so condensate runs back towards the
trap. Support should be provided for intake and vent piping, particularly so for horizontal
runs (follow local code). Insulate exhaust piping where it passes through unheated spaces
or underground, with appropriate pipe insulation to prevent freezing of condensates.
Certain installations of the SL models can employ the 2" vent options. We caution
installers when using horizontal runs of 2" pipe. Reason: air friction from the fast moving
exhaust during long burner runs at high-fire in a 2" pipe can overcome gravity on 1/4" / foot
vent slope – leaving a pool of condensate at the next upturned elbow. Pooling can impair
the achievement of full high-fire rating plate performance.
Exhaust piping is inserted directly into the 3" female stainless steel fitting on the top, left
side of the boiler and run horizontally or vertically to the outdoors. Screen material can be
placed at the outlet as appropriate for the environment (e.g. insects, dust).
MAXIMUM EQUIVALENT LENGTH
SL 20-160 G3
35'
170'
allow 8' equivalent
allow 5' equivalent
allow 3' equivalent
use 8' equivalent
Not allowed
allow 20' equivalent of
3" Sched. 40
45' (max.) actual lineal x
2 = equivalent
SL 30-199 G3
Not applicable
150'
allow 8' equivalent
allow 5' equivalent
allow 3' equivalent
use 8' equivalent
Not allowed
allow 20' equivalent
of 3" Sched. 40
30' (max.) actual
lineal x 3.3 =
equivalent
1-7