IBC HC Series Installation And Operating Instructions Manual page 12

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.
WARNING
Fully insert the approved
venting material into the
boilers exhaust outlet and
tighten clamp to ensure the
venting connection is locked
in place.
1-6
HC SERIES BOILERS HC 13-50, HC 23-84, HC 29-106, HC 20-125, HC 33-160
Do not use ABS or any cellular core pipe for exhaust venting.
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenolsulfone) in venting systems shall be prohibited.
The boiler offers 3" venting connections. Fittings are to be used to adapt to the
appropriate diameter (see Vent Travel below). CPVC or PVC Exhaust Venting is
to be inserted directly into the 3" female stainless steel fitting on left side of the
boiler's top panel. The clamp must be tightened to secure the pipe into the fitting.
If PPs materials are being used, ensure the proper adapter is used to transition
from the Schedule 40 diameter to the PPs size diameter.
For PPs material, use the 3" transition/ adaptor fitting (Sch 40 to PPs) offered
by the respective PPs manufacturers Centrotherm / Innoflue
ISAA0303) or M&G Dura Vent /PolyPro (#3PPS-AD). For PPs material exposed to
outdoor weather, follow the venting suppliers' recommendations on UV protection.
Combustion air piping is inserted directly into the 3" female stainless steel fitting
on the right (see Section 1.4.7).
Venting shall be supported in accordance with 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
CPVC or PPs (Rigid Single Wall) piping is the standard venting option; with this,
the HC Series boilers, for example, can be vented up to 120 equivalent feet
from the vent termination using 3". The actual vent travel allowance is reduced
for fittings in accordance with Table 3. – e.g. for the models listed above using
6 x 90º CPVC long sweep elbows, the maximum lineal measure of pipe allowed
using 3" pipe is 90 feet (120' – (6 x 5' = 30) = 90').
For 3" Flexible PPs, up to 35 actual lineal feet are allowed in a nominally vertical
orientation (>45°). The equivalent length of 3" Flexible PPs shall be computed
using a multiple of 1.4:1, e.g. 35' x 1.4 = 49' equivalent. The balance of the
venting allowance is still available for use with rigid PPs piping material. 2"
Flexible PPs is not allowed.
EXHAUST PIPE SIZE/FITTINGS
Schedule 40 PVC, CPVC or PPs – Allowances are for each side separately.
2"
3"
2" or 3" 90' Long Sweep Vent Elbow
2" or 3" 90' Short Sweep Vent Elbow
2" or 3" 45' Vent Elbow
PPS
PPs 87-90' Elbow
Flex PPS
3" PPs Flex
Table 3: Maximum Exhaust Venting Length
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).
MAXIMUM EQUIVALENT LENGTH
35'
120'
Allow 5 equivalent feet
Allow 8 equivalent feet
Allow 3 equivalent feet
Allow 8 equivalent feet
(Max. 35) actual feet times 1.4
INSTALLATION AND OPERATION INSTRUCTIONS
TM (their part #