Installation Guide

19
• 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 Water Heater and must be
purchased separately.
Vent Material Bird Screen Parts #
2 in. (50 mm) PVC or CPVC VT2-PVCS
3 in. (75 mm) PVC or CPVC VT3-PVCS
Centrotherm - 2 in. (50 mm) PP IASPP02
Centrotherm - 3 in. (75 mm) PP IASPP03
DuraVent - 2 in. (60 mm) PP 2PPS-BG
DuraVent - 3 in. (80 mm) PP 3PPS-BG
6.2.4 Maximum Vent Length
• This Water Heater has been designed to be
vented with either 2 in. (50 mm) or 3 in. (75 mm)
PVC, CPVC, or PP.
• The total vent length including horizontal and
vertical vent runs should be no less than 3 ft (0.9
m).
• The Water Heater 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 49 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 Remote Controller and a
cease in operation.
If this occurs, disconnect, then reconnect the
electrical power to the Water Heater to reset
the system.
NOTE
• When adjusting the DIP switches
for longer vent runs, the Btu/h
input of the Water Heater will be
reduced by up to 9%.
• Do not change any other DIP
switches.
Maximum Vent Length Configurations
• The maximum vent length when using 2 in. (50
mm) pipe is 65 ft.
• The maximum vent length when using 3 in. (75
mm) pipe is 150 ft.
Both maximum lengths are reduced by the
number of elbows used, as shown in the following
table:
Vent
diameter
Maximum equivalent
vent length*
1
V (Vertical)
+
H (Horizontal)
Maximum #
of elbows*
2
Equivalent
length
2 in. 65 ft (20 m) 6
90° elbow:
5 ft (1.5 m)
3 in. 150 ft (46 m) 15
45° elbow:
3 ft (0.9 m)
*1 The maximum vent length includes elbows.
*2 Not including the termination.
Here
[DIP Switch Adjustment]
Vent length condition
DIP switches
#7 #8
①Less than 33 ft using 2 in. (50 mm) pipe
 
②33 ft or more using 2 in. (50 mm) pipe
 
③Less than 75 ft using 3 in. (75 mm) pipe
 
④75 ft or more using 3 in. (75 mm) pipe
 
ON =  / OFF = 
[Vent length Calculation example]
Step 1:
Vent Diameter
2 in.
Step 2:
Straight pipe length
(Vertical length + Horizontal length)
17 ft
NOTE
Below are additional models
approved for use by Noritz and
supplied by IPEX. Refer to the IPEX
literature or web site for additional
details.
• The following termination can also be used.
- Termination Manufacturer: IPEX Management Inc.
- Item description
Item Item #
Universal Concentric Vent Kit (UCVK)*
(PVC ULC S636/UL 1738 - Certified for
use in both Canada and USA)
PVC-UCVK
(397007)
IPEX Low Profile Termination Kit**
(PVC ULC S636/UL 1738 - Certified
for use in both Canada and USA)
2 in.
PVC-2LPT
(397100)
3 in.
PVC-3LPT
(397101)
* 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
Venting the Water Heater