IBC Technologies SL 20-115 - Page 9

1-5
INSTALLATION
SL 20-115 MODULATING GAS BOILER
• Any improper operation of the common venting system should be corrected
so the installation conforms with the National Fuel Gas Code, ANSI Z223.1 -
latest edition. In Canada, all installations must conform with the current CAN/
CGA - B149.1-10 Installation Code and/or local codes.
1.4.1 Applications
All SL series boilers are approved with alternative venting options: either 2-pipe
DirectVentorsinglepipe/IndoorAirventingcanbeusedofferingexibilityto
meetthespecicrequirementsoftheinstallation.WiththeDirectVentcase,
combustion air is piped directly to the boiler’s air intake from outdoors (see
Section 1.4.7 for air intake piping requirements). Using the indoor air alternative,
air for combustion is drawn from the indoor air surrounding the boiler.
Provided the maximum overall vent length limit is not exceeded, the installer may
choose to vent the boiler through the wall, directly through the roof or upward
using an existing - but otherwise unused - chimney as a vent raceway.
1.4.2 Exhaust Vent Material
EXHAUST VENT MATERIAL – CANADA
Only CPVC or Polypropylene (PPs) vent component systems approved under
ULC-S636 Standard for Type BH Gas Venting Systems, or stainless steel Type
BH venting systems* are to be used. Permitted PPs materials comprise Single
WallRigidpipeandttingsandFlexible.Ensurecompliancewithexhaust
temperature limitations for the respective materials, which typically are:
• ULC-S636 CPVC: 90°C (194°F)
• ULC-S636 PPs:- 110°C (230°F)
For long vent runs with higher initial exhaust temperature, some jurisdictions may
allow the use of mixed materials for economy: CPVC for the initial run followed by
ULC-S636 approved PVC to the termination (It is the responsibility of the Installer
toconrmthatlocalcodeswillallowthisoption).Ensureappropriatetransition
glueisused.Theinstallerisresponsibletoensurethatsufcienttemperature
loss is allowed for in the CPVC section to fall below the 65°C (149°F ) upper limit
for PVC, taking into account the highest possible ambient temperature in the area
of vent travel (e.g. boiler room, attic and/or chase).
EXHAUST VENT MATERIAL – USA
IBC strongly recommends that only CPVC or PPs vent component systems
approved under ULC-S636 Standard for Type BH Gas Venting Systems,
or stainless steel Type BH venting systems* are to be used but many local
jurisdictions in the USA still allow the use of PVC (Sch. 40 ASTM D1785 or
D2665andttings)orCPVC(Sch.40/ASTMF441withSch.80ttings);orCSA
approved 2” or 3” stainless vent systems. If PVC is to be used, you shall use a
minimum of 10 lineal feet of CPVC, and then transition to PVC using approved
transition glue. The installer shall ensure that vent temperatures in the PVC
section cannot exceed 140°F.
Do not use ABS or any cellular core pipe for exhaust venting.
The boiler offers 3” venting connections. Fittings are to be used to adapt to the
appropriate diameter (see Vent Travel below). There are two stainless steel,
gasketedttingsonthetopoftheboiler.Exhaustventingistobeinserteddirectly
intothe3”femalestainlesssteelttingontheleft(see Figure 3).
ForPPsmaterial,usethe3”transition/adaptortting(Sch40toPPs)offered