1-7
INSTALLATION
SL 80-399 MODULATING GAS BOILER
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
For PPs material, use the transition / adaptor fitting (Sch 40 to PPs) offered by the
respective PPs manufacturers Centrotherm / Innoflue
TM
(their part # ISAA0303 or #
ISAA0404) or M&G Dura Vent / PolyPro
TM
(# 3PPs-AD), (# 4PPs-AD) or Z-Flex/Z_DENS (#
2ZDCPVCG3). For PPs material exposed to outdoor weather, follow the venting supplier’s
recommendations on UV protection.
Combustion air piping - if used - is inserted directly into the 3" or 4" female stainless steel
fitting (see Section 1.4.7).
Venting shall be supported in accordance with the applicable code.
*Manufacturers of stainless steel Type BH venting systems must submit their approved
transition fitting to IBC for evaluation and written approval.
1.4.3 Vent Travel
PVC/CPVC or PPs (Rigid Single Wall) or Schedule 40 approved piping is the standard
venting option; with this, the boilers can be sited up to 200 equivalent feet from the vent
termination. The actual vent travel allowance is reduced for fittings in accordance with the
following tables. For example, for an SL 40-399 G3 using 6 x 90º CPVC vent elbows, the
maximum lineal measure of pipe allowed is 152 feet (200' – (6 x 8' = 48) = 152').
SL 26-260 G3
EXHAUST PIPE SIZE
MAXIMUM EQUIVALENT LENGTH
Sched.40; Rigid PPs
3"
200' (each side)
90° vent elbow
allow 8' equivalent
90° long sweep elbow
allow 5' equivalent
45° elbow
allow 3' equivalent
PPs 87-90° elbows
use 8' equivalent
3" Stainless Sidewall Terminal (SST)
IBC P/N 180-149 (P-257)
allow 20' equivalent of 3" Sched. 40
Flexible PPs
3" PPs Flexible
60' (max.) actual lineal x 3.33 = equivalent
Table 3A: Maximum Exhaust Venting Length for SL 26-260 G3
WARNING
Do not mix PPs 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.
WARNING
Fully insert the approved venting
material into the boilers exhaust
outlet and tighten clamp to ensure
the venting connection is locked
in place.
