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6.2.3 Termination Considerations
• Do not store hazardous or flammable substances
near the vent termination and check that the
termination is not blocked in any way.
• Steam or condensed water may come out from
the vent termination. Select the location for
the termination as to prevent injury or property
damage.
• If snow is expected to accumulate, make sure the
termination will not be covered with snow or hit
by falling lumps of snow.
• (For PVC/CPVC/PP material) A bird screen must
be installed on the vent terminations to prevent
debris or animals from entering the piping. These
screens are not supplied with the Combi Boiler
and must be purchased separately.
Vent Material
2 in. (50 mm) PVC or CPVC
3 in. (75 mm) PVC or CPVC
Centrotherm - 2 in. (50 mm) PP
Centrotherm - 3 in. (75 mm) PP
DuraVent - 2 in. (60 mm) PP
DuraVent - 3 in. (80 mm) PP
• The following termination can also be used.
- Termination Manufacturer: IPEX Management Inc.
- Item description
Universal Concentric Vent Kit (UCVK)*
(PVC ULC S636/UL 1738 - Certified for
use in both Canada and USA)
IPEX Low Profile Termination Kit**
(PVC ULC S636/UL 1738 - Certified
for use in both Canada and USA)
NOTE Below are additional models
approved for use by the manufacturer
and supplied by IPEX. Refer to
the IPEX literature or web site for
additional details.
* Universal Concentric Vent Kit:
<USA>
#397256 - PVC System 1738
<Canada> #196256 - PVC System 636
#197256 - CPVC System 636
** Low Profile Termination Kit:
<USA>
#397984 - 2" PVC System 1738
#397985 - 3" PVC System 1738
<Canada> #196984 - 2" PVC System 636
#196985 - 3" PVC System 636
22
Venting the Combi Boiler
Bird Screen Parts #
Pavilion Stock Code
: 1816
Pavilion Stock Code
: 1817
IASPP02
IASPP03
2PPS-BG
3PPS-BG
Item
(397007)
2 in.
(397100)
3 in.
(397101)
6.2.4 Maximum Vent Length
• This Combi Boiler has been designed to be
vented with either 2 in. (50 mm) or 3 in. (75 mm)
PVC, CPVC, PP, or 3 in. (75 mm) flexible pipe for
chimney.
• The minimum total vent length including
horizontal and vertical vent runs should not be
less than:
- PVC/CPVC/PP, 3 in. (75 mm) flexible pipe for
chimney: 3 ft (0.9 m)
• The Combi Boiler can be adjusted to
accommodate longer vent runs; refer to the table
below. Do not exceed the maximum vent length.
• Disconnect the electrical power and then adjust
the DIP switches according to the vent condition
noted in the tables below.
Refer to page 68 for the location of the DIP switch
bank and how to change the DIP switches.
Failure to perform this step will result a "73" code
displayed on the Operation Display and a cease in
operation.
If this occurs, disconnect, then reconnect the
electrical power to the Combi Boiler to reset the
system.
NOTE • When adjusting the DIP switches
Stock
Code
Maximum Vent Length Configurations (For PVC/
1819
CPVC/PP material)
1820
• The maximum vent length when using 2 in. (50
mm) pipe is 60 ft.
1820-1
• The maximum vent length when using 3 in. (75
mm) pipe is 100 ft.
Both maximum lengths are reduced by the
number of elbows used, as shown in the following
table:
Vent
diameter
2 in.
3 in.
*1 The maximum vent length includes elbows.
*2 Not including the termination.
for longer vent runs, the Btu/h
input of the Combi Boiler will be
reduced by up to 9%.
• Do not change any other DIP
switches.
Maximum equivalent
vent length*
1
Maximum #
V (Vertical)
of elbows*
+
H (Horizontal)
60 ft (18 m)
100 ft (30 m)
Equivalent
length
2
90° elbow:
6
5 ft (1.5 m)
45° elbow:
8
3 ft (0.9 m)
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