Gorenje NRK-1 User manual

Installation Manual
1
Potential dangers from accidents during installation and use are divided into the following three categories.
Closely observe these warnings, they are critical to your safety.
WARNING
CAUTION
DANGER DANGER indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
Vent Kit for Condensing Tankless Gas Water Heater
NRK-1
Rev. 06/23 SBB81HS
Model: NRK-1
Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI
Z223.1 / NFPA54 - latest edition and/or the Natural Gas and Propane Installation Code CSA B149.1 - latest
edition.
The manufacturer reserves the right to discontinue, or change at any time, the designs and/or specifications of its
products without notice.
[Applicable Model]
• EZ98DV, EZ111DV
• NRCR92DV, NRCR111DV
Refer to the installation procedure video by scanning the two-dimensional barcode on the right.
(https://help.noritz.com/index.php/knowledge-base/nrk-1installation/)
If the information in this manual is not followed exactly, a fire or explosion may result causing property
damage, personal injury or death.
WARNING
• Do not connect this vent kit to any appliance not listed in this manual.
• Do not connect this vent kit to any other manufacturer’s appliance.
DANGER
Requests to Installers
• This manual is for the vent components for the designated tankless water heater. For the installation of the
tankless water heater itself, read the installation manual that comes with the tankless water heater.
• In order to install this vent kit correctly, read this installation manual carefully, and follow the installation
instructions.
• Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by
the warranty.
• Check that the installation was done properly in accordance with this installation manual upon completion.
• After completing installation, place this installation manual in a plastic pouch and attach it to the side of the
water heater, or hand it to the customer to retain for future reference.
CAUTION

1. General Information
2
Property damage, personal injury or death can result if these instructions are not followed. They are a guide for
professional installers generally familiar with the installation and maintenance of heating equipment and related
vent systems.
• Do not install in areas with minimum temperatures below 32°F (0°C) as condensation will form inside the
B-Vent causing corrosion.
• Do not use for anything other than designated tankless water heater (including models manufactured by
others).
• Appliances can be started up immediately after NRK-1 is installed and inspected.

2. Included Accessories and Parts Lists
3
Part Shape Q'ty Part#
Diffuser Items
- No Roof Kit
Diffuser 1 EZ2FVD-NRK
Base Junction Support 1 EZ2FVBJS-1
Base Junction Adapter Set 1 EZ2FVBJADS-1
3″ Diffuser Gasket 1 EZ2FVDG-1
4″ Diffuser Gasket 1 EZ2FV4DG
Aluminum Tape 4 —
Spacer for 3″ B-Vent 1 EZ2SP3-NRK
Spacer for 4″ B-Vent 1 EZ2SP4-NRK
Installation Manual
(This document) 1 —
SV Conversion 2″ Air Intake Filter 1 SV-CK-2-1
InnoFlue®
Items
2″ Polypropylene Rigid Pipe
(Straight, 3 ft) 3 ISVL023
Polypropylene-PVC Adapter 1 ISAGL0202
Centrocerin (Lubricant) 1 IACE50
Color: red
Color: white
The following accessories are included.
Check for any missing items before starting installation.
Note) PVC pipe is not included in this kit.

3. General Safety
4
• If similar vent has already been installed, it must be replaced with this designated new one.
• NRK-1 is designed only for installation inside of the B-Vent wall. Do not use it for other installation method.
• Make sure the B-Vent rain cap is attached before installation. Do not use this kit if the B-Vent rain cap or
B-Vent itself is corroded and damaged.
• Before installation, make sure no nails or screws have penetrated through the inner B-Vent wall where
the polypropylene pipe will be installed. Those obstructions may damage the polypropylene pipe and may
result in fires, property damage or exposure to Carbon Monoxide.
• Make sure components are kept under these following conditions.
* Clean and dry place.
* Keep out of direct sunlight.
• Handle the polypropylene pipe carefully.
Dropping, Crushing and Stacking may cause damage, and may result in fires, property damage or
exposure to Carbon Monoxide.
• NRK-1 cannot be painted.
• Avoid places where open flame are common, such as those where gasoline, benzene and adhesives are
handled, or places in which corrosive gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are
present.
• Avoid installation in places where dust or debris will accumulate.
Dust may block the air-supply opening, causing the performance of the device fan to drop and incomplete
combustion may occur as a result.
• Avoid installation in places where special chemical agents (e.g. hair spray or spray detergent) are used.
• Only approved for use with the designated B-Vent manufactures.
• If the B-Vent rain cap falls off from the roof due to the installation work, access to the roof for replacement
of the rain cap may be required.
• Any work done incorrectly or not described in this manual can leave parts in the B-Vent and be difficult to
remove. In this case, access to the roof may be required.
WARNING
• Check for any damage to components that may have occurred during transportation before installation.
• Consult with the customer regarding the location of installation.
• Do not install this vent kit in a place where it may be subject to falling objects.
CAUTION

4. Before Installation (Check the condition of installation site)
5
Before installing the NRK-1 vent kit, verify that the installation location is suitable. All checkpoints (1-8) must be
verified to be in the “Suitable” column. If any item is found to be in the “Not Suitable” column, STOP and the Flex
Vent 2” Kit should be used instead.
Check point Suitable Not Suitable
Mark “ ” if each
condition is
matched.
1. Vent system
Vent system is used by 1 appliance only Common vent
2. No Screws or
nails protruding
within the B-Vent
No screws or nails protruding Screws or nails protruding
3. B-Vent shape
Round Oval
4. B-Vent diameter 3″ or 4″ 5″ or larger
5. Distance B-Vent
connection from
the ceiling to the
unit
Horizontal : 5 ft or less
Vertical : 3 ft or less
Horizontal : More than 5 ft
Vertical : More than 3 ft
3 ft or les
s5 ft or less

6
Check point Suitable Not Suitable
Mark “ ” if each
condition is
matched.
6. Vent length from
the top of unit to
the B-Vent rain
cap
No turn from the
B-Vent rain cap to
the ceiling
8.5 ft or less (no turn)
More than 8.5 ft
or
There is a turn
8.5 ft or les
s
7. Rain cap
manufacturer
Duravent
Model:3BVDC, 3GVDC
4BVDC, 4GVDC
Other than those in the left columns.
Amerivent
Model: 3ECW, 4ECW
Metal-Fab
Model: 3MCHP, 4MCHP
8. Connection type
of rain cap
Normal locking
Cap fits over outside of B-vent
Universal cap
Cap fits inside of B-vent

5. General System Overview
7
For 3″ B-Vent
For 4″ B-Vent
2ʺ Air Intake Filter
Diffuser
Spacer
Base Junction Support
Roof
Ceiling
Polypropylene-PVC adapter
B-Vent Rain Cap
PVC Items
(Elbows, Straight Pipes)
3ʺ B-Vent (Straight)
3ʺ Diffuser Gasket
2ʺ Polypropylene Pipe (Straight)
2ʺ Air Intake Filter
Diffuser
Base Junction Support
Base Junction Adapter
Roof
Ceiling
B-Vent Rain Cap
PVC Items
(Elbows, Straight Pipes)
4ʺ B-Vent (Straight)
4ʺ Diffuser Gasket + 3ʺ Diffuser Gasket
2ʺ Polypropylene Pipe (Straight)
Polypropylene-PVC adapter
Spacer

6. Installation
8
If the B-Vent rain cap falls off from the roof due to the installation work, access to the roof for replacement of the
rain cap may be required.
Any work done incorrectly or not described in this manual can leave parts in the B-Vent and be difficult to remove.
In this case, access to the roof to remove or replace parts may be required. Take extra care and precaution to
perform the installation as safely as possible.
1. Tools necessary for the installation
2. Installation Procedure
For an example of a proper installation of this kit. Please follow the procedure below.
If not installed correctly, the water heater will not function properly.
1. Screwdriver 2. Cutting tool 3. Tape measure 4. Marker
• Phillips head
or
• Flat head
• Box wrench (5/16″)
• Hacksaw
• Box Cutter
etc.
NOTE: Hand saws are
not approved for cutting.
NOTE: Single side
hook tape measures
are recommended.
Double-sided hook tape
measures may get caught
inside B-vent.
Double-sided
hook types
• For your safety, do not attempt to work on a rooftop until safety precautions have been identified and taken
including fall prevention measures, ladders or stairways, and personal protective equipment (PPE).
• Installation in windy or wet conditions require additional precautions. Follow local safety regulations.
WARNING
Except for PVC items, use only the parts provided in the package.
Using parts other than the ones provided may cause the product to be assembled incorrectly.
WARNING
[Maximum vent lengths]
• The maximum vent length is 17 ft (5.2 m). The maximum vent length of the B-Vent is 8.5 ft (2.6 m).
• The maximum allowed number of elbows is 2 using 45 degree elbows or 90 degree elbows.
Before proceeding with the installation, refer to section “4. Before Installation (Check the condition of
installation site)”.

9
1Remove the B-Vent between bottom of ceiling and tank type water heater.
• Do not leave the B-Vent elbow. Only straight piping from the B-Vent rain cap to the
bottom of the ceiling.
• Make sure the bottom edge of the B-Vent is below the ceiling.
• Make sure no screws or nails are protruding into the B-Vent.
• Make sure there are no holes on the inside of the B-Vent.
2Drain and remove the tank type water heater.
3Measure the original B-Vent diameter and length from the bottom of the B-Vent to the
rain cap.
Record this measurement. This distance is used to determine the total length of
polypropylene pipe.
Tape measure
B-Vent Rain Cap
B-Vent
Length
Diameter
Installation Procedure
Necessary
Accessories
and Tools

10
Installation Procedure
Necessary
Accessories
and Tools
4: This section details how to measure then cut the polypropylene pipes to the required length needed
for the measured B-Vent.
4-1 Check the table (on pages 12-13) for selecting proper polypropylene pipe length
in accordance with the B-Vent length.
Example of B-Vent length: 66 1/4″
NOTE:
If B-Vent measurement is 66.49″ (or less), use 66″ on the chart. If B-Vent measurement
is 66.5″ (or more), use 67″ on the chart.
4-2 Confirm the required number of polypropylene pipes and their length.
Example of B-Vent length: 66 1/4″
NOTE:
Refer to the table (on pages 12-13) before cutting the polypropylene pipe,
to prevent the female end from interfering with the base junction support and
the base junction adapter attached to the bottom end of the B-Vent. The flared
female end of the polypropylene pipe does not fit through the base junction
support or adapter.
The lengths in the table also include an additional 8” length that may be used to
easily attach any additional needed parts below the B-Vent.
Female
end
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
66 35 31 3/4 13 1/4 or more 5 1/4
67 35 32 3/4 13 1/4 or more 5 1/4
[Excerpt from the table on page 12]
Pipe #1 Pipe #2 Pipe #3
[Excerpt from the table on page 12]
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
66 35 31 3/4 13 1/4 or more 5 1/4
67 35 32 3/4 13 1/4 or more 5 1/4
The number of polypropylene pipes: 3
Pipe length
Pipe-#1: 35″
Pipe-#2: 31 3/4″
Pipe-#3: 13 1/4″ or more

11
Installation Procedure
Necessary
Accessories
and Tools
4-3 Cut the polypropylene pipe in accordance with the table with a hacksaw.
Example of B-Vent length: 66 1/4″
• Deburr the cut end using a box cutter so that damage to the diffuser gasket is
avoided.
• Remove debris from inside the polypropylene pipe prior to assembly.
Measure
Hacksaw
Box Cutter
4-4 Put a mark on the polypropylene pipe in accordance with the table.
The mark is used for confirming if the installation is done properly.
Example of B-Vent length: 66 1/4″
Proceed to Step 5 on page 14
Measure
Marker
[Excerpt from the table on page 12]
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
66 35 31 3/4 13 1/4 or more 5 1/4
67 35 32 3/4 13 1/4 or more 5 1/4
Cut the pipe at
8″ from the
male end. Cut
Cut
35″
Pipe-#1 Pipe-#2 Pipe-#3
8″
31 3/4″
Necessary minimum
length: 13 1/4″
Do not cut pipe shorter than
13 1/4″, measured from the
female side of the
polypropylene pipe. This
length should be determined
by the actual water heater
installation condition such
that enough pipe is exposed
to attach adapter.
1/8″ (3 mm)
or less
3° or less
Determine the length of pipe #3
according to the location of the
water heater
.
[Excerpt from the table on page 12]
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
66 35 31 3/4 13 1/4 or more 5 1/4
67 35 32 3/4 13 1/4 or more 5 1/4
5 1/4″
Mark
Pipe-#3

12
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Mark Pipe-#2 Pipe-#3
12 18 or more 12
Not used. Not used.
13 19 or more 13
14 20 or more 14
15 21 or more 15
16 22 or more 16
17 23 or more 17
18 24 or more 18
19 25 or more 19
20 26 or more 20
21 27 or more 21
22 28 or more 22
23 29 or more 23
24 30 or more 24
25 31 or more 25
26 32 or more 26
27 33 or more 27
28 34 or more 28
29 35 29
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Mark Pipe-#3
38 35 12 3/4 or more 4 3/4
Not used.
39 35 13 3/4 or more 5 3/4
40 35 14 3/4 or more 6 3/4
41 35 15 3/4 or more 7 3/4
42 35 16 3/4 or more 8 3/4
43 35 17 3/4 or more 9 3/4
44 35 18 3/4 or more 10 3/4
45 35 19 3/4 or more 11 3/4
46 35 20 3/4 or more 12 3/4
47 35 21 3/4 or more 13 3/4
48 35 22 3/4 or more 14 3/4
49 35 23 3/4 or more 15 3/4
50 35 24 3/4 or more 16 3/4
51 35 25 3/4 or more 17 3/4
52 35 26 3/4 or more 18 3/4
53 35 27 3/4 or more 19 3/4
54 35 28 3/4 or more 20 3/4
55 35 29 3/4 or more 21 3/4
56 35 30 3/4 or more 22 3/4
57 35 31 3/4 or more 23 3/4
58 35 32 3/4 or more 24 3/4
59 35 33 3/4 or more 25 3/4
60 35 34 3/4 or more 26 3/4
61 35 35 3/4 or more 27 3/4
62 35 36 3/4 or more 28 3/4
63 35 37 3/4 or more 29 3/4
64 35 38 3/4 or more 30 3/4
65 35 39 3/4 or more 31 3/4
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Mark Pipe-#3
30 26 1/2 13 1/4 or more 5 1/4
Not used.
31 27 1/2 13 1/4 or more 5 1/4
32 28 1/2 13 1/4 or more 5 1/4
33 29 1/2 13 1/4 or more 5 1/4
34 30 1/2 13 1/4 or more 5 1/4
35 31 1/2 13 1/4 or more 5 1/4
36 32 1/2 13 1/4 or more 5 1/4
37 33 1/2 13 1/4 or more 5 1/4
For B-Vent length from 12″ to 29″ For B-Vent length from 38″ to 65″
For B-Vent length from 30″ to 37″
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
66 35 31 3/4 13 1/4 or more 5 1/4
67 35 32 3/4 13 1/4 or more 5 1/4
68 35 33 3/4 13 1/4 or more 5 1/4
69 35 34 3/4 13 1/4 or more 5 1/4
70 35 35 3/4 13 1/4 or more 5 1/4
71 35 36 3/4 13 1/4 or more 5 1/4
72 35 37 3/4 13 1/4 or more 5 1/4
73 35 38 3/4 13 1/4 or more 5 1/4
For B-Vent length from 66″ to 73″

13
B-Vent
length
[inch]
Polypropylene pipe length [inch]
Pipe-#1 Pipe-#2 Pipe-#3 Mark
74 35 40 1/4 12 3/4 or more 4 3/4
75 35 40 1/4 13 3/4 or more 5 3/4
76 35 40 1/4 14 3/4 or more 6 3/4
77 35 40 1/4 15 3/4 or more 7 3/4
78 35 40 1/4 16 3/4 or more 8 3/4
79 35 40 1/4 17 3/4 or more 9 3/4
80 35 40 1/4 18 3/4 or more 10 3/4
81 35 40 1/4 19 3/4 or more 11 3/4
82 35 40 1/4 20 3/4 or more 12 3/4
83 35 40 1/4 21 3/4 or more 13 3/4
84 35 40 1/4 22 3/4 or more 14 3/4
85 35 40 1/4 23 3/4 or more 15 3/4
86 35 40 1/4 24 3/4 or more 16 3/4
87 35 40 1/4 25 3/4 or more 17 3/4
88 35 40 1/4 26 3/4 or more 18 3/4
89 35 40 1/4 27 3/4 or more 19 3/4
90 35 40 1/4 28 3/4 or more 20 3/4
91 35 40 1/4 29 3/4 or more 21 3/4
92 35 40 1/4 30 3/4 or more 22 3/4
93 35 40 1/4 31 3/4 or more 23 3/4
94 35 40 1/4 32 3/4 or more 24 3/4
95 35 40 1/4 33 3/4 or more 25 3/4
96 35 40 1/4 34 3/4 or more 26 3/4
97 35 40 1/4 35 3/4 or more 27 3/4
98 35 40 1/4 36 3/4 or more 28 3/4
99 35 40 1/4 37 3/4 or more 29 3/4
100 35 40 1/4 38 3/4 or more 30 3/4
101 35 40 1/4 39 3/4 or more 31 3/4
102 35 40 1/4 40 1/4 32 1/4
For B-Vent length from 74″ to 102″

14
5Attach the diffuser and the 3″ diffuser gasket to the cut side of the pipe-#1.
Diffuser
3″ Diffuser
Gasket
4″ Diffuser
Gasket
(only for 4″
B-Vent)
Fix the diffuser and the 3″ diffuser gasket to the pipe-#1 by 3 screws.
• After installation, visually confirm that the diffuser, 3″ diffuser gasket, and pipe are
securely fastened by looking through holes in the diffuser.
For 4″ B-Vent, put 4″ diffuser gasket on top of 3″ diffuser gasket.
3″ Diffuser Gaske
t
Too Much
Screws not
penetrating pipe
3″ Diffuser Gasket
4″ Diffuser Gasket
3″ Diffuser Gaske
t
4″ Diffuser Gaske
t
Installation Procedure
Necessary
Accessories
and Tools

15
Installation Procedure
Necessary
Accessories
and Tools
6Peel off the release paper of the double sided tape attached on the diffuser top and
attach the spacer.
NOTE:
Make sure the spacers are correctly oriented.
Spacer for 3″
B-Vent
Spacer for 4″
B-Vent
7Apply Centrocerin (Lubricant) only to the top and bottom of the diffuser gasket.
Diffuser
Diffuser Gasket
Polypropylene pipe
Apply Centrocerin
(Lubricant)
Centrocerin
(Lubricant)
8Loosen the 2 bands on the top and bottom of the base junction support.
[For 4″ B-Vent]
Attach the base junction support to the base junction adapter and make the base
junction adapter set.
The tightening torque should be between 7 and 10 in lb.
Base Junction
Support
Base Junction
Adapter
Screwdriver
(Flat head)
or
Box wrench
(5/16″)
Release Paper
[For 3″ B-Vent]
Use spacer for 3″ B-Vent.
Red
[For 4″ B-Vent]
Use spacer for 4″ B-Vent.
Whit
e
Loosen by at
least one turn
.
Tighten

16
Installation Procedure
Necessary
Accessories
and Tools
9Pass the pipe-#1 in the B-Vent very carefully.
10 Connect next polypropylene pipe. Make sure that it is firmly inserted all the way in with
Centrocerin, then fix it by using aluminum tape.
NOTE:
• If you only use pipe-#1 and pipe-#2, make sure pipe-#2 is the pipe you marked in
step 4-4.
• When using pipe-#3, install using the same procedure as above.
In this case, make sure pipe-#3 is the pipe you marked in step 4-4.
• Insert the pipes more carefully as the mark approaches to the B-Vent end.
Centrocerin
(Lubricant)
Aluminum tape
Spin
Push
Pipe-#1:
Polypropylene
pipe with diffuse
r
B-Vent
Do not insert
completely as it will
connect with other
polypropylene pipes.
Mark
Pipe-#2 Pipe-#3
Apply a thin layer of
Centrocerin to the O-ring
attached to the female side
of the polypropylene pipe.
Fix the connection part of
the polypropylene pipe with
aluminum tape.
Aluminum tape
Matching surface
Make sure the marked point and
the B-Vent end are approximately
in the same position.
If there is a difference of more
than 2 inches, start over from
step 3.
Mark Mark
More
than
2″
Mark
More
than
2″

17
Installation Procedure
Necessary
Accessories
and Tools
11 Connect the base junction support with end of the B-Vent.
When passing the base junction support through the polypropylene pipe, hold the
polypropylene pipe firmly and be careful not to push the polypropylene pipe up the
B-Vent rain cap.
NOTE:
• If you fail to hold the polypropylene pipe in place, the entire assembly may push up
and jar the B-Vent rain cap out of place.
• Fix the spacer with the spacer touching the top surface
of the B-Vent rain cap so that the polypropylene pipe
does not fall down.
• [For 4″ B-Vent] Attach the base junction adapter set
with 2 screws from outer pipe of the B-Vent.
• Tighten the band on the base junction support for the B-Vent and the polypropylene
pipe, and then fix them completely.
• The tightening torque should be between 7 and 10 in lb.
Screwdriver
(Phillips head)
Screwdriver
(Flat head)
or
Box wrench
(5/16″)
12 Attach the polypropylene-PVC adapter to the polypropylene pipe with Centrocerin.
Polypropylene
-PVC Adapter
Centrocerin
(Lubricant)
Spacer
Top surface of the
B-Vent rain cap
Base Junction Suppor
t
Tighten
Tighte
n
Base Junction Support
(Example of 3″ B-Vent)
Screws
Base Junction Support
Base Junction Adapter
Tighten
(Example of 4″ B-Vent)
Apply a thin layer of
Centrocerin to the O-ring
attached to the female side of
the polypropylene-PVC
adapter.
Polypropylene-PVC adapter
(Example of 3″ B-Vent)

18
Installation Procedure
Necessary
Accessories
and Tools
13 Make PVC pipe route to the water heater by using elbows (90 or 45 degree), straight
pipes (short sections).
Screwdriver
(Flat head)
or
Box wrench
(5/16″)
14 Fix the connection part with aluminum tape.
Aluminum tape
(Example of 3″ B-Vent)
Polypropylene-PVC
adapter
PVC items (Elbows, Straight pipes)
You can move the water heater
left or right to adjust the PVC pipe.
(Example of 3″ B-Vent)
WARNING
Determine the proper length not giving
too much tension to vent pipe.
If the PVC pipe is too
short, there will be
tension to those parts.
Be careful not to make trap
configuration of PVC pipe.
Slope the horizontal vent 1/4″
upwards for every 12″ (305 mm)
toward the termination to drain
condensate.
Aluminum tape
Polypropylene-PVC
adapter
PVC items
(Elbows, Straight pipes
)
Aluminum tape
Polypropylene-PVC
adapter
Polypropylene pipe

19
Installation Procedure
Necessary
Accessories
and Tools
15 Insert the air intake filter into the intake.
Follow the instruction in the SV conversion kit installation manual to install the SV
conversion kit. Screwdriver
(Flat head)
or
Box wrench
(5/16″)
16 Adjust the exhaust type setting to single vent (SV).
Example of GQ-C3260 series
Remove the front cover and adjust the DIP switch.
Disconnect the electrical power and then turn ON DIP switch #3.
17 Make sure that there is no leakage or loose connection in the venting system.
18 After installation is completed, visually confirm the B-Vent rain cap has not been
dislodged during installation.
Air Intake Filter
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.
Circuit Board
12345678
OFF
ON
Here
CARBON MONOXIDE POISONING
Failure to properly seal the vent system could cause dangerous flue gases to
enter the living space.
WARNING

7.Maintenance
20
• The venting system must be examined periodically by a qualified service technician to check for any leaks or
corrosion.
• Check and confirm that there is no tension to the polypropylene and PVC pipe by hanging or suspending of
anything.
• When replacing the water heater, replace whole venting components to new ones.
Periodically check the following to ensure
proper operation of the water heater.