Noritz GQ-C3260WXQ-FF US User manual

FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1 / NFPA
54- latest edition and/or the Natural Gas and Propane Installation Code CSA B149.1- latest edition.
When applicable, installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR,
Part 3280 or the Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products
without notice.
Contact Noritz America at 1-866-766-7489, if you have any questions or concerns.
CONDENSING TANKLESS GAS WATER HEATER
Installation Manual
Models : NRCR111DV (GQ-C3260WXQ-FF US)
NRCR92DV (GQ-C2660WXQ-FF US)
NORITZ America Corporation
Requests to Installers
• In order to use the Water Heater safely, 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 Noritz America Limited Warranty.
• Check that the installation was done properly in
accordance with this Installation Manual upon
completion.
• After completing installation, either place this
Installation Manual and Owner’s Guide (the
warranty registration information included) in
a plastic pouch and attach it to the side of the
Water Heater (or the inside of the pipe cover
or recess box if applicable), or hand it to the
customer to retain for future reference. For the
warranty conditions and limitations, see the
Owner’s Guide.
CAUTION
If the information in these instructions is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or
death.
• Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use
any phone in your building.
- Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
- If you cannot reach your gas supplier, call the
fire department.
• Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
WARNING
Low NOx Approved by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
SBB8168-4
Rev. 04/21

2
Contents
1 Before Installation 3
2 About the Water Heater 5
2.1 Included Accessories ....................... 5
2.2 Optional Accessories ....................... 5
2.3 Specifications................................... 7
2.4 Dimensions ...................................... 8
2.5 External View................................... 10
3 Choosing an Installation Location 11
4 Installation Clearances 13
4.1 Indoor Installation ........................... 13
4.2 Outdoor Installation ........................ 14
4.3 For Quick Connect Multi-System..... 14
5 Installation of the Water Heater 15
5.1 Mounting the Water Heater
to the wall ........................................ 15
5.2 Elevation Adjustment Above
2,000 ft............................................. 16
5.3 Filling the condensate container
with water........................................ 16
6 Venting the Water Heater 17
6.1 Venting Installation Sequence......... 17
6.2 General Requirements..................... 17
6.3 Select a Vent Type............................ 23
6.4 Vent Pipe Installation (Direct Vent) .. 24
6.5 Vent Pipe Installation
(Non-Direct Vent) ............................ 30
6.6 Outdoor Installation ........................ 36
7 Connecting the Gas Supply 36
8 Connecting the Water Supply 40
8.1 Overview of the Recirculation
System.............................................. 40
8.2 Installation ....................................... 43
8.3 Water treatment.............................. 45
9 Connecting the Condensate Drain 47
10 Connecting Electricity 49
10.1 Water Heater ................................... 49
10.2 Remote Controller ........................... 49
10.3 Recirculation .................................... 50
10.4 Quick Connect Cord-2 ..................... 51
11 Installation of the Remote Controller 52
11.1 General Requirements..................... 52
11.2 RC-7651M-A .................................... 52
11.3 RC-9018M ........................................ 54
12 Setting the DIP Switches 58
13 Setting for Recirculation 59
14 Trial Operation 60
15 Checklist After Installation 63
16 Plumbing Applications 65
17 Installation of the Quick Connect
Multi-System 66
18 Maintenance 68
18.1 Periodic Check ................................. 68
18.2 Procedure for Flushing the Heat
Exchanger ........................................ 69
Contents

3
1 Before Installation
Potential dangers from accidents during installation and use are divided into the following four categories.
Closely observe these warnings, they are critical to your safety.
Indicates an imminently hazardous situation which, if not avoided, will result in death
or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
Indicates a potentially hazardous situation which, if not avoided, may result in property
damage.
DANGER
WARNING
CAUTION
NOTICE
Checkup
Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary.
DANGER
Precautions on Vent Pipe Replacement
The vent system will almost certainly need to be
replaced when this appliance is being installed.
Only use vent materials that are specified in this
Installation Manual for use on this appliance.
Refer to the “Venting the Water Heater” section
for details. If PVC, CPVC, or Category IV listed pipe
is already installed, check for punctures, cracks,
or blockages and consult with the vent pipe
manufacturer before reusing.
If the flexible polypropylene pipe is already
installed, replace to the new flexible polypropylene
pipe.
Improper venting may result in fires, property
damage or exposure to Carbon Monoxide.
Snow Precaution
If this product will be installed in an area where
snow is known to accumulate, protect the vent
termination from blockage by snow drifts or
damage from snow falling off of roofs.
Check the Gas
• Check that the rating plate indicates the correct
type of gas.
• Check that the gas supply line is sized for
199,900 Btu/h or 165,000 Btu/h.
199,900 Btu/h:
NRCR111DV (GQ-C3260WXQ-FF US)
165,000 Btu/h:
NRCR92DV (GQ-C2660WXQ-FF US)
Check the Power
The power supply required is 120 VAC, at 60 Hz.
Using the incorrect voltage may result in fire or
electric shock.
Use Extreme Caution if Using With a Solar Pre-
Heater
Using this appliance with a solar pre-heater can
lead to unpredictable output temperatures and
possibly scalding. To ensure outlet temperatures
do not exceed 120°F (49°C) at faucets, mixing valve
must be installed.
Do not use a solar pre-heater with the Quick
Connect Multi-System because the system may not
operate properly.
Precautions for Mobile Home Installation
• Verify that the gas supply type matches the gas
type listed on the rating plate. If a gas conversion
must be done, follow the instructions listed in
the gas conversion kit manual.
• If this product will be installed indoors, usage of
the SV conversion kit (SV-CK-2-1 or SV-CK-2) and
the Flex Vent 2 in. Conversion Kit (EZ2-CK-1 or
EZ2-CK) are prohibited. Make sure to follow all
clearance and venting requirements outlined in
this manual.
Chemicals
This product can expose you to chemicals including
lead, lead compounds and carbon bisulfide which
are known to the State of California to cause
cancer, birth defects or other reproductive harm.
For more information go to
www.P65Warnings.ca.gov.
WARNING
e.g. NRCR111DV (GQ-C3260WXQ-FF US)
Before Installation

4
• This appliance is suitable for combination
potable water and space heating applications.
It cannot be used for space heating
applications only.
• Do not use this appliance if any part has been
underwater. Immediately call a qualified
service technician to inspect the appliance
and replace any part of the control system
and gas control which has been under water.
NOTICE
Do Not Use Appliance for Purposes Other Than
Those Specified
Do not use for other than increasing the
temperature of the water supply, as unexpected
accidents may occur as a result.
Check Water Supply Quality
If the water supply is in excess of 12 grains
per gallon (200 mg/L) of hardness, acidic or
otherwise impure, treat the water with approved
methods in order to ensure full warranty
coverage.
CAUTION
Please read if installing in Massachusetts
Massachusetts requires manufacturers of Side
Wall Vented products to provide the following
information from the Massachusetts code:
• A hard wired carbon monoxide detector with
an alarm and battery back-up must be installed
on the floor level where the gas equipment is to
be installed AND on each additional level of the
dwelling, building or structure served by the side
wall horizontal vented gas fueled equipment.
• In the event that the side wall horizontally vented
gas fueled equipment is installed in a crawl space
or an attic, the hard wired carbon monoxide
detector with alarm and battery back-up may be
installed on the next adjacent floor level.
• Detector(s) must be installed by qualified licensed
professionals.
• APPROVED CARBON MONOXIDE DETECTORS:
Each carbon monoxide detector shall comply with
NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.
• SIGNAGE: A metal or plastic identification plate
shall be permanently mounted to the exterior of
the building at a minimum height of eight (8) ft
above grade directly in line with the exhaust vent
terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall
read, in print size no less than one-half (1/2) in. in
size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR
OF ALL OBSTRUCTIONS”.
• EXEMPTIONS to the requirements listed above:
- The above requirements do not apply if the
exhaust vent termination is seven (7) ft or more
above finished grade in the area of the venting,
including but not limited to decks and porches.
- The above requirements do not apply to a
product installed in a room or structure separate
from the dwelling, building or structure used in
whole or in part for residential purposes.
• This installation manual shall remain with the
product at the completion of the installation.
See the latest edition of Massachusetts Code
248 CMR for complete verbiage and also for
additional (non-vent related) requirements (248
CMR is available online). If your installation is NOT
in Massachusetts, please see your authority of
jurisdiction for requirements that may be in effect
in your area. In the absence of such requirements,
follow the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 and/or CAN/CSA B149.1, Natural Gas and
Propane Installation Code.
Before Installation

5
Anchoring Screw (× 7)
Remote Controller (× 1)
[RC-7651M-A]
(See page 52)
Owner’s Guide, Installation Manual (this
document) (1 each)
Remote Controller Cord (6 ft (1.8 m)) (× 1)
Wall Mounting Bracket (× 1)
Remote Controller Cord (26 ft (7.9 m)) (× 1)
[RC-CORD26]
Isolation Valves (1 each)
(includes pressure relief valve)
Isolation valves are
necessary for flushing the
Heat Exchanger.
They allow for easy flushing
and troubleshooting of the
system.
Cross Over Valve Kit (× 1)
[cCS-V]
Crossover Kit (× 1)
[CSV-BPK]
On Demand Switch- Rocker Type (× 1)
[IHK-RS]
On Demand Button (× 1)
[IHK-GB]
PVC Concentric Termination (× 1)
2 in. (50 mm) : [PVC-2CT]
3 in. (75 mm) : [PVC-3CT]
Quick Connect Cord (× 1)
[QC-2]
2 About the Water Heater
The following accessories are included with the
Water Heater.
Check for any missing items before starting
installation.
The accessories listed below are not included
with the Water Heater, but may be necessary for
installation.
2.1 Included Accessories
2.2 Optional Accessories
NOTE Additional vent pieces are available;
consult the latest product catalogue
for details.
About the Water Heater

6
Noritz Connect Wireless Adapter
NWC-ADAPTER (× 1)
[NAW-1 US]
Noritz Connect Wireless
Adapter enables users to:
• Remote control (Power
ON/OFF, Adjust set
temperature, Operating
for recirculation)
For more information, visit
the Noritz America website
(http://wifi.noritz.com/).
Neutralizer (× 1)
[NC-1S]
(For 1 Water Heater)
Flex Vent 2 in. Conversion Kit
[EZ2-CK-1] [EZ2-CK]
Pipe Cover (× 1)
[PC-10S]
Flex Vent 2 in. Kit – 25 ft
[EZ2FVK-1]
Flex Vent 2 in. Kit – 35 ft
[EZ2FVK-2]
Flex Vent 2 in. Kit – 35 ft*
[EZ2FVP35-3]
(*Including only flex pipe)
During the installation of
Flex Vent 2 in. Kit, ambient
temperatures must be
greater than 40°F (5°C).
Afterwards, installation
site ambient temperature
must be greater than -4°F
(-20°C). Flex vent pipe
breakage may occur if these
temperature requirements
are not observed.
Remote Controller (× 1)
[RC-9018M]
(See page 54)
2 in. SV Conversion Kit (× 1)
[SV-CK-2-1] [SV-CK-2]
Outdoor Vent Cap (× 1)
[VC-6-1]* [VC-6]
* Not approved for use in
Canada.
Bird Screen for 2 in. (50 mm) PVC
[VT2-PVCS]
Bird Screen for 3 in. (75 mm) PVC
[VT3-PVCS]
3 in. (75 mm) Horizontal Hood Termination
[PVT-HL]
Universal Concentric Vent Kit
[PVC-UCVK]
Low Profile Termination Kit
2 in.: [PVC-2LPT]
3 in.: [PVC-3LPT]
ULC S636 / UL 1738
certified for use in both
Canada and USA
Plastic Rain Cap
[PRC-1]
Not approved for use in
Canada.
About the Water Heater

7
2.3 Specifications
• Specifications may be changed without prior notice.
• The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water
temperature.
* Minimum flow rate may change by setting temperature and water temperature.
Item Specification
Model Name NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US)
Type Installation Indoor / Outdoor Wall mounted
Air Supply / Exhaust Power Vented
Ignition Direct Ignition
Operating Pressure 15-150 psi
(Recommended 50 to 80 psi for maximum performance)
Minimum Activation Flow Rate*
Minimum Operating Flow Rate*
0.5 GPM (2.0 L/min)
0.29 GPM (1.1 L/min)
Dimensions (Height) × (Width) × (Depth) 27.0 in. (687 mm) × 18.5 in. (471 mm) × 14.1 in. (359 mm)
Weight 73 lbs. (33 kg)
Water Holding Capacity 0.85 Gallon (3.2 L)
Connection
Sizes
Water Inlet NPT 3/4 in.
Hot Water Outlet NPT 3/4 in.
Hot Water Return NPT 3/4 in.
Gas Inlet NPT 3/4 in.
Condensate Drain NPT 1/2 in.
Power
Supply
Supply 120 VAC (60 Hz)
Consumption NG: 218 W LP: 202 W
Freeze Prevention: 114 W
NG: 185 W LP: 175 W
Freeze Prevention: 114 W
Maximum Current 4 Amps
Materials
Casing
•Front Cover: Hot-dipped zinc-aluminum-magnesium-alloy-coated
steel w/ Polyester Coating
•Casing: Zincified Steel Plate / Polyester Coating
Flue Collar PP
Primary Heat Exchanger Stainless Steel Sheeting, Stainless Steel Tubing
Secondary Heat Exchanger Stainless Steel Sheeting, Stainless Steel Tubing
Safety Devices Flame Rod, High Limit Switch, Lightning Protection Device (ZNR),
Freezing Prevention Device, Fan Rotation Detector
Included Accessories Remote Controller, Remote Controller Cord, Anchoring Screws, Wall
Mounting Bracket
Item Performance
NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US)
Maximum Minimum Maximum Minimum
Gas Consumption NG 199,900 Btu/h 18,000 Btu/h 165,000 Btu/h 18,000 Btu/h
LP 199,900 Btu/h 18,000 Btu/h 165,000 Btu/h 18,000 Btu/h
Maximum Hot Water Capacity
(45°F (25°C) Rise) 8.7 GPM (33 L/min) 7.1 GPM (27 L/min)
Capacity Range 0.5-11.1 GPM (2-42 L/min) 0.5-9.2 GPM (2-35 L/min)
Temperature Settings °F Mode 100-140°F (In 5°F intervals) (9 Options)
°C Mode 37-48°C (In 1°C intervals), 50-60°C (In 5°C intervals) (15 Options)
Performances
About the Water Heater

8
2.4 Dimensions
I.DΦ2.4”[Φ61]
2.3”[58]
2.0”[52]
AIR INLET
3×0.5”×1.6”[12×40]RECTANGLE HOLE
1.6”[40]
10.2”[260]
0.5”[12]
27.1”[690]
27.4”[696]
2.2”[56]
3.9”[100]
5.2”[132]
6.7”[169]
8.1”[206]
2×0.4”×0.24”[10×6]OBLONG HOLE
4×0.24”×0.6”[6×15]OBLONG HOLE
4×Φ0.5”[Φ13]
14.1”[359]
1.1”[27]3.5”[89]
0.3”[8]
26.0”[661] 25.9”[658]
2.3”[59]
0.4”[10]
17.8”[452]
18.5”[471]
17.8”[451]
10.1”[256]5.1”[130]
I.DΦ2.4”[Φ61]
FLUE COLLAR
(VIEW FROM BOTTOM)
COLD WATER INLET(3/4”)
WIRING THROUGHWAY
WATER DRAIN VALVE
(WATER FILTER)
WIRING THROUGHWAY
(AC120V)
WATER DRAIN VALVE
HOT WATER OUTLET(3/4”)
GAS INLET(3/4”)
WATER DRAIN VALVE
HOT WATER RETURN(3/4”)
11.3”[288]
9.7”[246]
2.0”[51]
4.9”[124]
1.7”[42]
5.7”[144]
7.0”[177]
9.2”[234]
15.4”[392]
15.6”[397]
10.9”[276]
CONDENSATE DRAIN(1/2”)
WATER DRAIN VALVE
2.2”[56]
6.0”[152]
8.3”[229]
WALL MOUNTING BRACKET
(INCLUDED ACCESSORY)
7×Φ0.2”[Φ6]
16.0”[406]
10.2”[260]
5.1”[130]
7.2”[183]
2.1”[5.3]
27.0”[687]
About the Water Heater

9
2.4 Dimensions
<inch [mm]>
I.DΦ2.4”[Φ61]
2.3”[58] 2.0”[52]
AIR INLET
3×0.5”×1.6”[12×40]RECTANGLE HOLE
1.6”[40]
10.2”[260]
0.5”[12]
27.1”[690] 27.4”[696]
2.2”[56]
3.9”[100]
5.2”[132]
6.7”[169]
8.1”[206]
2×0.4”×0.24”[10×6]OBLONG HOLE
4×0.24”×0.6”[6×15]OBLONG HOLE
4×Φ0.5”[Φ13]
14.1”[359]
1.1”[27]3.5”[89]
0.3”[8]
26.0”[661] 25.9”[658]
2.3”[59]
0.4”[10]
17.8”[452]
18.5”[471]
17.8”[451]
10.1”[256]5.1”[130]
I.DΦ2.4”[Φ61]
FLUE COLLAR
(VIEW FROM BOTTOM)
COLD WATER INLET(3/4”)
WIRING THROUGHWAY
WATER DRAIN VALVE
(WATER FILTER)
WIRING THROUGHWAY
(AC120V)
WATER DRAIN VALVE
HOT WATER OUTLET(3/4”)
GAS INLET(3/4”)
WATER DRAIN VALVE
HOT WATER RETURN(3/4”)
11.3”[288]
9.7”[246]
2.0”[51]
4.9”[124]
1.7”[42]
5.7”[144]
7.0”[177]
9.2”[234]
15.4”[392]
15.6”[397]
10.9”[276]
CONDENSATE DRAIN(1/2”)
WATER DRAIN VALVE
2.2”[56]
6.0”[152]
8.3”[229]
WALL MOUNTING BRACKET
(INCLUDED ACCESSORY)
7×Φ0.2”[Φ6]
16.0”[406]
10.2”[260]
5.1”[130]
7.2”[183]
2.1”[5.3]
27.0”[687]
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
HOT WATER OUTLET 1.8”[45]
COLD WATER INLET 1.9”[49]
CONDENSATE DRAIN 1.7”[42]
HOT WATER RETURN 2.7”[69]
GAS INLET 2.2”[56]
About the Water Heater

10
2.5 External View
Water Supply
Valve
Hot Water
Return Valve
Gas Supply Valve
Condensate Drain Pipe
Water Drain Valve
(with Water Filter)
Pressure Relief
Valve
Hot Water Valve
Outdoor Vent Cap (VC-6-1 or VC-6)
Intake Pipe Exhaust Pipe
Flex Vent 2 in. Conversion Kit (EZ2-CK)
2 in. SV Conversion Kit (SV-CK-2-1)
2 in. SV Conversion Kit (SV-CK-2)
Flex Vent 2 in. Conversion Kit (EZ2-CK-1)
(e.g. Non-direct vent installation)
* The exterior view of air intake side (“Intake Pipe”)
may be different due to the installed item.
(e.g. Direct vent installation)
Indoor Installation
Outdoor Installation
About the Water Heater

11
3 Choosing an Installation Location
Locate the vent terminal and make sure there
are no obstacles around the termination for
exhaust to accumulate or be obstructed.
Do not enclose the termination with corrugated
metal or other materials.
Carbon monoxide poisoning or fire may occur
as a result.
DANGER
• Avoid places where fires 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.
If you do not follow the above, a fire or
explosion may result causing property
damage, personal injury or death.
• Avoid installation in places where dust or
debris will accumulate.
Dust may accumulate and reduce the
performance of the fan of the appliance.
This can result in incomplete combustion.
• Avoid installation in places where special
chemical agents (e.g. hair spray or spray
detergent) are used.
Ignition failures and malfunctions may occur
as a result.
• Do not install this Water Heater in a
recreational vehicle or on a boat as this may
be a Carbon Monoxide Poisoning Hazard.
• The manufacturer does not recommend
installing the Water Heater in an attic due to
safety issues.
If you install the Water Heater in an attic:
- Make sure the appliance will have enough
combustion air and proper ventilation.
- Keep the area around the Water Heater
clean. Dust may accumulate and reduce the
performance of the fan of the appliance.
This can result in incomplete combustion.
- A drain pan, or other means of protection
against water damage, is required to be
installed under the Water Heater in case of
leaks.
WARNING
Do not install in the following places
• A location where it is not free from obstacles
and stagnant air.
• Near staircases or emergency exits.
• A place where it may be threatened by falling
objects, such as under shelves.
• On common walls as the appliance will make
some operational noises while it is running.
Consideration to the surroundings
• Do not install the Water Heater where the
exhaust will blow on outer walls, other
walls or material not resistant to heat. Also
consider the surrounding trees and animals.
The heat and moisture from the Water
Heater may cause discoloration of walls and
resinous materials, or corrosion of aluminum
materials.
• Do not locate the vent termination directed
towards a window or any other structure
which has glass or wired glass facing the
termination.
• Take care that noise and exhaust gas will not
affect neighbors.
• If the appliance is installed in a location with
very high humidity, condensate may form
inside the appliance and/or cause incomplete
combustion, damage to the electrical
components, or electric leakage.
Install according to regulations and manual
• Install the Water Heater in an area that allows
for the proper clearances to combustible
and non-combustible construction. Consult
the rating plate on the appliance for proper
clearances.
• The Water Heater must be installed according
to manual.
• Before installing, make sure that the exhaust
flue termination will have the proper
clearances according to the National Fuel
Gas Code (ANSI Z223.1- latest edition) or the
Natural Gas and Propane Installation Code
(CSA B149.1).
CAUTION
Choosing an Installation Location

12
Installation in the vicinity of gas ranges,
stoves, fans, and range hoods
• Avoid installation above gas ranges or stoves.
• Avoid installation between the kitchen fan
and stove. If oily fumes or a large amount of
steam are present in the installation location,
take measures to prevent the fumes and
steam from entering in the appliance.
• Install in a location where the exhaust gas
flow will not be affected by fans or range
hoods.
CAUTION
NOT
CORRECT
CORRECT
NOT
CORRECT
• Place the appliance for easy access for
maintenance and repair.
• Do not install the Water Heater in a location
where the appliance will be exposed to
excessive winds.
• The Water Heater will make noise during
operation. Depending on the construction
of the building, this noise may be noticeable
within the building while operating. Avoid
installing the Water Heater in a location (e.g.
adjacent to bedroom, office) where this noise
may become a nuisance.
• Locate the appliance in an area where
leakage from the appliance or connections
will not result in damage to the area adjacent
to the appliance or to the lower floors of the
structure. When such installation locations
cannot be avoided, a suitable drain pan,
adequately drained, must be installed under
the appliance. The pan must not restrict
combustion air flow.
• As with any water heating appliance, the
potential for leakage at some time in the life
of the product does exist. The manufacturer
will not be responsible for any water damage
that may occur.
• Water quality:
If this Water Heater will be installed in a
location where the hardness of the supply
water is high, scale Build-up may cause
damage to the Heat Exchanger.
Perform suggested treatment and
maintenance measures in reference to “8.3
Water Treatment”.
Damage to the Water Heater as a result
of the below is not covered by the Noritz
America Limited Warranty.
- Water in excess of 12 gpg (200 mg/L) of
hardness
- Poor water quality (see the following table)
NOTICE
Contaminant Maximum Allowable Level
Total Hardness* 200 mg/L (12 gpg) or less
Aluminum 0.05 to 0.2 mg/L or less
Chloride 250 mg/L or less
Copper 1.0 mg/L or less
Iron 0.3 mg/L or less
Manganese 0.05 mg/L or less
pH 6.5-8.5
Total Dissolved Solids 500 mg/L or less
Zinc 5 mg/L or less
Sulfate 250 mg/L or less
Residual chlorine* 4 mg/L or less
Source: EPA National Secondary Drinking Water
Regulations (40 CFR Part 143.3)
* Maximum limit suggested by Noritz.
NOTE Consult with the customer concerning
the location of installation.
Choosing an Installation Location

13
State of California: The Water Heater must be
braced, anchored or strapped to avoid moving
during an earthquake. Contact local utilities for code
requirements in your area or call 1-866-766-7489
and request instructions.
The Commonwealth of Massachusetts:
1) This Water Heater can only be used in outdoor
applications if the usage is restricted to
summertime usage exclusively.
2) The Water Heater can be used for hot water only
and not in a combination of domestic and space
heating.
For Venting Manufacturers Requirements, see the
Noritz America website (www.noritz.com).
4 Installation
Clearances
4.1 Indoor Installation
Before installing, check for the following:
Install in accordance with relevant building and
mechanical codes, as well as any local, state or
national regulations, or in the absence of local
and state codes, refer to National Fuel Gas Code
ANSI Z223.1 / NFPA 54- latest edition. In Canada,
see the Natural Gas and Propane Installation
Code CSA B149.1- latest edition for detailed
requirements.
WARNING
Required Clearances From the Water Heater
Maintain the clearances from both combustible and
non-combustible materials.
12 in. (300 mm)
or mor
e
3 in. (76 mm)
or more
4 in. (100 mm)
or more
Securing of space for inspection/repair
In order to facilitate inspection and repair, the
minimum clearances should be met.
* 3 in. (76 mm) or more
** 8 in. (203 mm) or more
24 in.
(610 mm)
or more
*
*
** **
Exhaust
Choosing an Installation Location / Installation Clearances

14
Cooking Equipment
When utilizing an indoor air supply, if the Water
Heater will be installed in the vicinity of a
permanent kitchen range or stove that has the
possibility of generating steam that contains fats
or oils, use a dividing plate or other measure to
ensure that the Water Heater is not exposed to air
containing such impurities.
Exhaust hood
Range
The dividing pla
te should
be of non-combus
tible
material of a width
gr
eater than the Water
Heate
r.
4.2 Outdoor Installation
Required Clearances From the Water Heater
Maintain the clearances from both combustible and
non-combustible materials.
24 in. (610 mm)
or more
36 in. (910 mm)
or more
Outdoor Vent Cap
(VC-6-1 or VC-6)
3 in. (76 mm) or more
4.3 For Quick Connect Multi-System
Surrounding the area of installation
[ When installing the Water Heater in a common side
corridor ]
47 in. (1,194 mm)
or more
84 in. (2,134 mm)
or more
the bottom edge of
the exhaust port
Common side
corridor
Handrail
The Quick Connect Cord is 6 ft (1.8 m) long.
Install the Water Heaters 3-18 in. (76-457 mm)
apart from each other to ensure the cord will be able
to reach between the Water Heaters.
3-18 in.
(76-457 mm)
Installation Clearances

15
5 Installation of the Water Heater
5.1 Mounting the Water Heater to the
wall
• Protect your hands with gloves and take
caution to not inflict injury.
• Be careful not to hit electrical wiring, gas, or
water piping while drilling holes.
CAUTION
• The weight of the appliance will be applied
to the wall. If the strength of the wall is not
sufficient, reinforcement must be done to
prevent the transfer of vibration.
• Install the appliance on a vertical wall and
ensure that it is level.
• The Water Heater will make noise during
operation. Depending on the construction
of the building, this noise may be noticeable
within the building while operating. Avoid
installing the Water Heater in a location (e.g.
adjacent to bedroom, office) where this noise
may become a nuisance.
NOTICE
Do not drop or apply unnecessary force to the
appliance when installing. Internal parts may be
damaged and may become highly dangerous.
WARNING
1. Ensure that the Wall Mounting Bracket is
leveled.
Drill holes for the Wall Mounting Bracket and
affix the Wall Mounting Bracket securely to the
wall by 5 screws.
Finally, make sure the bracket can support the
weight of the Water Heater.
2. Hang the Water Heater on the Wall Mounting
Bracket.
After hanging the Water
Heater, you have the ability
to move either left or right
to position the Water Heater
in the appropriate spot.
Once positioned, a screw
(see below) can be fastened
to ensure no horizontal
movement will occur.
(Not supplied
from Noritz.)
Mounng
Bracket
(Upper)
Hang
3. Affix the Mounting Bracket (Lower) to the wall
by 2 screws.
Anchoring Screw
Mounting
Bracket
(Lower)
IN OUT
The bracket has marking to
assist with ensuring properly
aligned connections. Align
the intake and exhaust vent
center line with the
corresponding mark on the
bracket.
Anchoring
Screw
Intake
Vent
Intake
Vent
Wall
Mounting
Bracket
Exhaust
Vent
Exhaust
Vent
Installation of the Water Heater

16
5.3 Filling the condensate container
with water
5.2 Elevation Adjustment Above 2,000 ft
Prior to initial start up, make sure that you fill
the condensate container with water.
This is to prevent dangerous exhaust gases from
entering the building.
Failure to fill the condensate container could
result in severe personal injury or death.
DANGER
Follow the procedure described below to ensure
that the condensate container is filled with water.
Fill the condensate container by pouring approx. 10
oz. (280 mL) of water into the exhaust flue on the
top of the Water Heater as illustrated below.
If the vent pipe has already been installed:
After installing the condensate drain pipe, make
sure that the area around the Water Heater is well
ventilated; open a window or a door if necessary.
Then, operate the Water Heater and verify that
condensate is coming out of the condensate drain
pipe.
(During normal use of the Water Heater, condensate
will begin to discharge from the condensate drain
pipe within 15 minutes of use. However, depending
on the season and/or installation site conditions, it
may take longer.)
10 oz.
280 mL
Intake Exhaust
• Adjust the DIP switches as illustrated in the table
below, if this Water Heater is installed at an
altitude of 2,000 ft (610 m) or higher.
• Disconnect the electrical power and then adjust
the DIP switches.
Refer to page 58 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 Do not change any other DIP switches.
Here
High elevation adjustment
DIP switches
#5 #6
0-2,000 ft (0-610 m) OFF OFF
2,001-4,000 ft (611-1,219 m) ON OFF
4,001-7,000 ft (1,220-2,134 m) OFF ON
7,001-10,000 ft (2,135-3,048 m) ON ON
Installation of the Water Heater

17
6 Venting the Water Heater
CARBON MONOXIDE POISONING
Follow all vent system requirements in
accordance with relevant local or state
regulation, or, in the absence of local or state
code, if in the U.S., refer to the National Fuel
Gas Code ANSI Z223.1 / NFPA 54- latest edition,
and if in Canada, in accordance with the Natural
Gas and Propane Installation Code CSA B149.1
- latest edition.
WARNING
6.2 General Requirements
• This is a Category IV appliance.
Only vent materials approved for use with
Category IV appliances shall be used.
• Under normal conditions, this Water Heater
will not produce an exhaust flue temperature in
excess of 149°F (65°C).
6.2.1 Vent Piping Material
For PVC / CPVC / PP / Stainless Steel material
• Schedule 40 PVC pipe may be used as the vent
material. If required by local code, use schedule
6.1 Venting Installation Sequence
4. Install termination assembly as described in
this manual or in the vent manufacturer’s
installation instructions.
If necessary, install Bird Screen (not supplied
with Water Heater).
5. Install combustion air and exhaust vent piping
from Water Heater to termination.
6. Slope the horizontal vent 1/4 in. upwards for
every 12 in. (305 mm) toward the termination.
7. Install supports and hanger straps allowing
for movement from expansion, or as per vent
pipe manufacturer’s instructions or local code
requirements.
[Exhaust Vent / Air Intake]
Material United States Canada
Exhaust Air Intake Exhaust Air Intake
Schedule 40
PVC ANSI/ASTM D1785 ULC S636
Certified
Materials
Only
CSA
B137.3
PVC-DWV ANSI/ASTM D2665 CSA
B181.2
Schedule 40
CPVC ANSI/ASTM F441 CSA B137.3
Polypropylene
(PP)*
Centrotherm- lnnoFlue®
(certified ULC S636),
DuraVent PolyPro® (certified ULC S636)
System 1738TM
PVC Fuel Gas
Venting
IPEX Management Inc.
(certified UL 1738)
Stainless
Steel*
DuraVent- FasNSeal®
(certified UL1738 and ULC S636)
* Only listed manufacture specified vent parts
may be used for this Water Heater.
Refer to the manufacture’s literature for
detailed information.
- Approved Vent Manufacture:
- Centrotherm- lnnoFlue® PP
- DuraVent PolyPro® / FasNSeal®
** Only listed above terminations are
applicable for Water Heater.
*** These terminations are concentric
vent termination of polypropylene.
The PVC to PP adapters are including
Parts #
Single Wall Pipe
(2 in. / 3 in.)
ISVL02xx(UV)/03xx(UV),
ISEP02xx/03xx, ISIA0203
Elbow ISELL0287(UV)/0387(UV),
ISELS0245/0345
Termination**
ISELL0287UV/0387UV,
ISTT0220/0320,
ICWT242/352***, ICTCR24,
ICCT3503, ICTC0335***
Bird Screen IASPP02/03
Parts #
Single Wall
Pipe
(2 in. / 3 in.)
2PPS-xxBL/3PPS-xxBL,
2PPS-xxL/3PPS-xxL,
FSVLxx03, FSAVL3(-2)
Elbow
2PPS-E90(B)L/3PPS-E90(B)L,
2PPS-E45(B)L/3PPS-E45(B)L,
FSELB9003/8803/4503/1503
Termination**
2PPS-E90(B)L/3PPS-E90(B)L,
2PPS-T(B)L/3PPS-T(B)L,
2PPS-HKC/3PPS-HKC***,
FSTT3, FSTB3, FSRC3
Bird Screen 2PPS-BG/3PPS-BG, FSBS3
FasNSeal
Adapter FSA-2PVCS-3FNSF
The venting system shall be installed in
accordance with the water heater manufacturer’s
instructions and, if applicable, the venting system
manufacturer’s instructions.
1. Install the Water Heater.
2. Determine the termination method—horizontal
or vertical, etc.
3. Determine proper location for wall or roof
penetration for each termination.
NOTE Do not exceed maximum allowed vent
lengths as described in this manual.
40/80 CPVC, PP or Stainless Steel.
• This Water Heater must be vented with plastic
pipe or stainless steel pipe materials as specified
in the table below.
Vent installations in Canada which utilize plastic
or stainless vent systems must comply with ULC
S636.
Venting the Water Heater

18
Exhaust Flex Chimney Lining Kit (3 in.): 3PPS-FKL,
Flex Length (3 in.): 3PPS-FLEXxx
Intake Aluminum Flex Length (3 in.): 3DFA-xx,
Coupler (3 in.): 3DFA-FCP
Exhaust
&
Intake*
Elbow (3 in.): 3PPS-E45L, 3PPS-E90L,
Single-Wall Pipe (3 in.): 3PPS-xxL
Appliance Adapter for PVC Coupler (2 in.):
2PPS-ADL,
Increaser: 2PPS-X3L
- DuraVent®- Flex Through Chimney w/ Air Intake
Exhaust Chimney Kit (3 in.): IFCK03xx,
Flexible Pipe PP (3 in.): IFVL03xxx
Intake Termination**: ISELL0387UV, ISTT0320,
Bird Screen: IASPP03
Exhaust
&
Intake*
Single Wall Pipe (3 in.): ISVL03xx(UV),
ISEP03xx
Elbow (3 in.): ISELL0387UV, ISELL0345UV,
ISEL0387, ISEL0345,
Increaser: ISIA0203
- Centrotherm- lnnoFlue® PP
* Recommended items.
** Applicable vent termination are “87° elbow” or
“Tee type”.
Concentric vent termination of polypropylene
are prohibited.
NOTE Covering non-metallic vent pipe and
fittings with thermal insulation is
prohibited.
For 2 in. flexible PP material
• Flex Vent 2 in. Conversion Kit (EZ2-CK-1 or EZ2-CK)
must be used when using 2 in. flexible PP pipe for
vent pipe installation. Refer to the instructions
provided with Flex Vent 2 in. Conversion Kit for
additional detail.
• During the installation of Flex Vent 2 in. Kit
(EZ2FVK-1, EZ2FVK-2 or EZ2FVP35-3), ambient
temperatures must be greater than 40°F (5°C).
Afterwards, installation site ambient temperature
must be greater than -4°F (-20°C). Flex vent
pipe breakage may occur if these temperature
requirements are not observed.
• Only listed manufacturer specified vent parts may
be used for this Water Heater.
• Use only solid PVC / CPVC (schedule 40), PP or
Stainless Steel pipe.
• 2 in. or 3 in. schedule 80 pipe may also be used
on this Water Heater, however the Btu/h input of
the Water Heater will be reduced by up to 9%.
• Maintain the same vent pipe diameter from the
Water Heater flue to the termination.
• In Canada, plastic vent systems must be certified
to ULC S636. The components of the certified
vent system must not be interchanged with other
vent systems or unlisted pipe/fittings.
• In Canada, specified primers and glues of the ULC
S636 certified vent system must be from a single
system manufacturer and not intermixed with
other system manufacturer’s vent system parts.
For flexible pipe for chimney
• During the installation, ambient temperatures
must be greater than 40 °F (5 °C). Afterwards,
installation site ambient temperature must
be greater than -4 °F (-20 °C). Flexible vent
pipe breakage may occur if these temperature
requirements are not observed.
• Only listed manufacture specified vent parts
may be used for this appliance. Refer to the
manufacture’s literature for detailed information.
[Information regarding certified “Flexible vent
pipe and connections”]
- Flex Vent 2 in. Kit – 25 ft (EZ2FVK-1)
- Flex Vent 2 in. Kit – 35 ft (EZ2FVP35-3)
Standard(s) ULC-S636-08 Standards for type BH Gas
Venting Systems
Product
25 ft- Flex Pipe 2 in.- LE, Flex Vent 2 in.
Rigid 45 Elbow Set- LE, 35 ft- Flex Pipe
2 in.- LE
Brand name Tokyo Gas Renovation Co.,Ltd.
• Do not intermingle any other venting material
with allowable polypropylene venting mentioned.
• The Btu/h input of the Water Heater will be
reduced by up to 9% when maximum vent length.
- Flex Vent 2 in. Kit – 35 ft (EZ2FVK-2)
Standard(s) ULC-S636-08 Standards for type BH Gas
Venting Systems
Product 35 ft- Flex Pipe 2 in.- CES, Flex Vent 2 in.
Rigid 45 Elbow Set- CES
Brand name Centrotherm- lnnoFlue®
in the box for each vent manufacture.
These adapters shall not be used for
connecting the appliance to concentric
vent termination. The appliance’s flue
collars (flue connections) are designed
to fit with 2 in. polypropylene diameter.
[Pipe Cement / Primer]
Material United States Canada
PVC ANSI/ASTM D2564 ULC S636
Certified Materials
Only
CPVC ANSI/ASTM F493
Use of cellular core PVC (ASTM F891), cellular
core CPVC, or Radel® (polyphenylsulfone) in
non-metallic venting system is prohibited.
WARNING
Venting the Water Heater

19
6.2.2 Installation Instructions
• Follow all general venting guidelines as outlined in
this manual.
• Clearance described in this document is the
minimum recommendation/required distance.
Take appropriate clearance according to the
situations of the site.
• Make sure the vent system is gas tight and will
not leak.
• Support the vent pipe with hangers at regular
intervals as specified by these instructions or the
instructions of the vent manufacturer.
• All piping must be fully supported. Use pipe
hangers at a minimum of 3 ft (0.9 m) intervals.
CARBON MONOXIDE POISONING
• Failure to properly seal the vent system could
cause flue products to enter the living space.
• (For flexible pipe for chimney)
Handle the flexible vent carefully.
Dropping, Crushing and Stacking may cause
damage, and may result in fires, property
damage or exposure to Carbon Monoxide.
WARNING
• Ensure at least 3 ft (0.9 m)
or more distance between
the near edge of the air
intake pipe or exhaust
pipe to the inside corner
of a wall.
[How to tighten the Vent Pipe]
1. Continue to insert the Vent Pipe until it reaches
to the base of the Water Heater Exhaust and
Intake Flue.
• The Vent Pipe will be inserted approximately
2.3 in. (60 mm).
2. Secure the Vent Pipe by tightening the band
using a screwdriver.
• The tightening torque shall be the following:
- For PVC/CPVC pipe: between 16 and 20 in lb
- For PP / Stainless Steel pipe: between 12 and
15 in lb
Exhaust and
Intake Flue
Screwdriver
- Flat head
- Box wrench (5/16 in.)
Vent Pipe
For PVC/CPVC/PP material
• When preparing and assembling the pipe,
follow instructions as provided by the pipe
manufacturer. In general, the following practices
must be observed:
- Squarely cut all pieces of pipe.
- Remove all burrs and debris from joints and
fittings.
- All joints must be properly cleaned, primed,
and cemented. Use only cement and primer
approved for use with the pipe material as
outlined on page 17.
• PVC, CPVC or PP pipe has been approved for
use on this Water Heater with zero clearance to
combustibles.
For 2 in. flexible PP material
• Flex Vent 2 in. Kit may be used only in
accordance with the installation manual
included with the kit.
•The 2 in. flex vent application is only suitable for
vertical vent configuration.
• Flex Vent 2 in. Kit can be installed at zero
clearance to combustible materials.
• The Water Heater can be started up immediately
after Flex Vent 2 in. Kit is installed and inspected.
• Flex Vent 2 in. Kit systems expand and contract
slightly during heating cycles and must be
installed following included instructions.
• Flex Vent 2 in. Kit cannot be painted.
• When installing N-Flex vent, pitch is required as
detailed in Flex Vent 2 in. Kit installation manual.
For flexible pipe for chimney
• Every venting system must be properly planned
and installed for optimum performance and
safety. A flexible pipe installation always begins
with an inspection of the existing masonry
chimney (Chimney must be clean, sized correctly,
properly constructed and in good condition, if
being installed in a chimney as a liner). Inspect
chimney to make certain it is constructed
according to the latest revision of the NFPA211.
Local codes may differ from this code and should
NOTE Do not use the Water Heater to
support the vent piping.
Inside corner
2 ft (0.6 m)*
or more
1 ft (0.3 m)
or mor
e
Vertical
Clearance**
* The clearance between
intake and exhaust
terminations must be
installed in accordance
with page 26 for horizontal
vent termination.
**Clearance requirement is
in accordance with page 24. This vertical clearance
must be considered to prevent exhaust accumulation
under the soffit.
NOTE Do not use electric drivers, impact
drivers and so forth.
• The pipe shall be installed so that the first 3 ft
(0.9 m) of pipe from the Water Heater flue outlet
is readily accessible for visual inspection.
Venting the Water Heater

20
6.2.3 Termination Considerations
• This Water Heater has been designed to be
vented with either 2 in. (50 mm) or 3 in. (75 mm)
PVC, CPVC, PP, 3 in. (75 mm) Stainless Steel or 3
in. (75 mm) flexible pipe for chimney. If you use
Flex Vent 2 in. Conversion Kit, you must use 2 in.
flexible PP.
• The minimum total vent length including
horizontal and vertical vent runs should not be
less than:
- PVC, CPVC, PP, 3 in. (75 mm) Stainless Steel or
3 in. (75 mm) flexible pipe for chimney: 3 ft (0.9
m)
- 2 in. flexible PP: 5 ft (1.5 m)
• The Water Heater can be adjusted to
accommodate longer vent runs; refer to the table
below. Do not exceed the maximum vent length.
• 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.
• The vent for this appliance shall not terminate:
i) over public walkways; or
ii) near soffit vents or crawl space vents or
other areas where condensate or vapor could
create a nuisance or hazard or cause property
damage; or
iii) where condensate vaper could cause damage
or could be detrimental to the operation of
regulators, relief valves, or other equipment.
6.2.4 Maximum Vent Length
• The following termination can also be used.
- Termination Manufacturer: IPEX Management Inc.
- Item description
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
DuraVent- 3 in. (75 mm)
Stainless Steel FSBS3
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.
* 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
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)
be checked. Where there is a conflict, the local
code will prevail. In Canada refer to the National
Building Code or CSA-A405 as applicable.
• Refer to manufacturer’s instructions for assembly
of all flexible components including the chimney
cap and adaptor to rigid pipe at base of masonry
Chimney.
• Ensure none of the vent pipes and chimneys are
damaged or blocked.
• Do not use an existing chimney as a raceway for
a flue pipe if another appliance or fireplace is
vented through the chimney, and do not have any
connections inside the chimney chase.
• When using an inoperative chimney as a means
of a chase for the vent system, the surrounding
space within the chimney cannot be used to draw
combustion air or vent another appliance.
• The remaining space surrounding a chimney
liner, the flexible pipe within a masonry, metal
or factory-built flue shall not be used to supply
combustion air to the Water Heater. A separate
combustion air intake pipe routed back to the
Water Heater can be used in the remaining space
if required, the Water Heater venting system
is approved for zero clearance, and can be run
directly beside the combustion air intake pipe.
Bolt or screw joints together to avoid sag.
• Flexible pipe vertical offsets must not exceed 45°
and are limited to a maximum number of 2.
• Connect flue pipe to the chimney with the
shortest possible length of flue pipe.
• Slope the horizontal vent 1/4 in. upwards for
every 12 in. (300 mm) toward the chimney from
the Water Heater.
• Check and confirm that there is no tension to
the flexible pipe by hanging or suspending of
anything.
• Check vent piping at least once a season. Verify
vent pipe connections to chimney are secure and
no obstructions are present. If vent piping shows
sign of leaking, replace it immediately.
• (For PVC / CPVC / PP / Stainless Steel 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 Water Heater and must be
purchased separately.
Venting the Water Heater