NORTITZ Condensing Tankless Gas Water Heater Instruction Manual

Instruction Manual for NORTITZ models including: Condensing Tankless Gas Water Heater, NRCR111DV GQ-C3260WXQ-FF US, NRCR92DV GQ-C2660WXQ-FF US

NRCR 92 111 IM

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Installation Manual

The Water Heater must be installed according to manual. • Before installing, make sure that the exhaust flue termination will have the proper clearances according ...

8 mar 2022 — FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS. Installation must conform with local codes, or in the absence of local codes, the National Fuel ...

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CONDENSING TANKLESS GAS WATER HEATER
Installation Manual
Models : NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US)

WARNING
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.

CAUTION
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 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. Also, be sure to fill in all of the required items on the warranty and to hand the warranty to the customer along with the Owner's Guide.

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.

NORITZ America Corporation

SBB8168 Rev. 05/19

Low NOx Approved by SCAQMD 14 ng/J or 20 ppm (Natural Gas Only)

Contents

1 Before Installation

2 About the Water Heater

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

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

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

2 Contents

8 Connecting the Water Supply 41 8.1 Overview of the Recirculation
System.............................................. 41 8.2 Installation ....................................... 42 8.3 Water treatment.............................. 45

9 Connecting the Condensate Drain 47

10 Connecting Electricity

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

13 Setting for Recirculation

14 Trial Operation

15 Checklist After Installation

16 Plumbing Applications

17 Installation of the Quick Connect

Multi-System

18 Maintenance

18.1 Periodic Check ................................. 68

18.2 Procedure for Flushing the Heat Exchanger ........................................ 69

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.

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.

NOTICE

Indicates a potentially hazardous situation which, if not avoided, may result in property damage.

DANGER
CChheecckkuthpe fixing brackets and vent pipe yearly for damage or wear. Replace if necessary.

WARNING
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)
e.g. NRCR111DV (GQ-C3260WXQ-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 PreHUseiantgetrhis appliance with a solar pre-heater can lead to unpredictable output temperatures and possibly scalding. If absolutely necessary, use mixing valves to ensure output temperatures do not get to scalding levels. 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) and the Flex Vent 2 in. Conversion Kit (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.

Before Installation 3

CAUTION
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.
NOTICE
· 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.
4 Before Installation

2 About the Water Heater

2.1 Included Accessories

2.2 Optional Accessories

The following accessories are included with the Water Heater. Check for any missing items before starting installation.
Anchoring Screw (× 7)

The accessories listed below are not included with the Water Heater, but may be necessary for installation.

NOTE

Additional vent pieces are available; consult the latest product catalogue

for details.

Remote Controller (× 1) (See page 52) [RC-7651M-A]

Quick Connect Cord (× 1) [QC-2]

Owner's Guide, Warranty card, Installation Manual (this document) (1 each)

Remote Controller Cord (26 ft (7.9 m)) (× 1) [RC-CORD26]

Remote Controller Cord (6 ft (1.8 m)) (× 1) Wall Mounting Bracket (× 1)

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]

PVC Concentric Termination (× 1) 2 in. (50 mm) : [PVC-2CT] 3 in. (75 mm) : [PVC-3CT]

2 in. SV Conversion Kit (× 1) [SV-CK-2]
· 90° Elbow (With Inlet Screen)
· 2 in. × 3 in. Increaser coupling
· 2 in. Pipe · Installation Manual
(Check List)
About the Water Heater 5

Outdoor Vent Cap (× 1) [VC-6]

Neutralizer (× 1) [NC-1S] (For 1 Water Heater)

Bird Screen for 2 in. (50 mm) PVC [VT2-PVCS]

Flex Vent 2 in. Conversion Kit [EZ2-CK]

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.

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/).
6 About the Water Heater

Flex Vent 2 in. Kit 25 ft [EZ2FVK-1] Flex Vent 2 in. Kit 35 ft [EZ2FVP35-3]
During the installation of Flex Vent 2 in. Kit (EZ2FVK-1 and 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.
Remote Controller (× 1) (See page 54) [RC-9018M]

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.

Item

Specification

Model Name

NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US)

Type

Installation Air Supply / Exhaust

Indoor / Outdoor Wall mounted 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)

Water Inlet

NPT 3/4 in.

Connection Sizes

Hot Water Outlet Hot Water Return Gas Inlet

Condensate Drain

NPT 3/4 in. NPT 3/4 in.
NPT 3/4 in. NPT 1/2 in.

Supply

120 VAC (60 Hz)

Power Supply

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 Flue Collar

·Front Cover: Hot-dipped zinc-aluminum-magnesium-alloy-coated steel w/ Polyester Coating
·Casing: Zincified Steel Plate / Polyester Coating 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

* Minimum flow rate may change by setting temperature and water temperature.

Performances Item

Gas Consumption

Maximum Hot Water Capacity (45°F (25°C) Rise)

Capacity Range

Temperature Settings

°F Mode °C Mode

Performance

NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US)

Maximum

Minimum

Maximum

Minimum

199,900 Btu/h 18,000 Btu/h 165,000 Btu/h 18,000 Btu/h

8.7 GPM (33 L/min)

7.1 GPM (27 L/min)

0.5-11.1 GPM (2-42 L/min)

0.5-9.2 GPM (2-35 L/min)

100-140°F (In 5°F intervals) (9 Options)

37-48°C (In 1°C intervals), 50-60°C (In 5°C intervals) (15 Options)

About the Water Heater 7

2.4 Dimensions
8 About the Water Heater

HEIGHT OF EACH FITTING FROM BOTTOM OF CASE
HOT WATER OUTLET COLD WATER INLET CONDENSATE DRAIN HOT WATER RETURN
GAS INLET

1.8"[45] 1.9"[49] 1.7"[42] 2.7"[69] 2.2"[56]

About the Water Heater 9

2.5 External View

Water Drain Valve (with Water Filter) Hot Water Return Valve Water Supply Valve

Pressure Relief Valve Hot Water Valve

Gas Supply Valve

Condensate Drain Pipe

Indoor Installation Intake Pipe Exhaust Pipe
Flex Vent 2 in. Conversion Kit
Outdoor Installation Outdoor Vent Cap

10 About the Water Heater

3 Choosing an Installation Location

DANGER
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.
WARNING
· 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.

CAUTION
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).

Choosing an Installation Location 11

CAUTION
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.

NOTICE

· 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.
· 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)

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

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.

12 Choosing an Installation Location

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
WARNING
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.

4.1 Indoor Installation
Required Clearances From the Water Heater Maintain the clearances from both combustible and non-combustible materials.

Securing of space for inspection/repair In order to facilitate inspection and repair, the minimum clearances should be met.

Choosing an Installation Location / Installation Clearances 13

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.

Surrounding the area of installation [When installing the Water Heater in a common side corridor]

4.2 Outdoor Installation
Required Clearances From the Water Heater Maintain the clearances from both combustible and non-combustible materials.

4.3 For Quick Connect Multi-System
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.

14 Installation Clearances

5 Installation of the Water Heater

5.1 Mounting the Water Heater to the wall

2. Hang the Water Heater on the Wall Mounting Bracket.

WARNING
Do not drop or apply unnecessary force to the appliance when installing. Internal parts may be damaged and may become highly dangerous.

CAUTION
· 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.

NOTICE
· 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.
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.

3. Affix the Mounting Bracket (Lower) to the wall by 2 screws.

Installation of the Water Heater 15

5.2 Elevation Adjustment Above 2,000 ft

· 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.

High elevation adjustment
0-2,000 ft (0-610 m) 2,001-4,000 ft (611-1,219 m) 4,001-7,000 ft (1,220-2,134 m) 7,001-10,000 ft (2,135-3,048 m)

ON = / OFF = DIP switches #5 #6

5.3 Filling the condensate container with water
DANGER
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.
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.)

16 Installation of the Water Heater

6 Venting the Water Heater

WARNING
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.

6.1 Venting Installation Sequence

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.

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.

6.2 General Requirements
6.2.1 Vent Piping Material
· 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).
For PVC/CPVC/PP material · Schedule 40 PVC pipe may be used as the vent
material. If required by local code, use schedule 40/80 CPVC or PP.

· This Water Heater must be vented with plastic pipe materials as specified in the table below. Vent installations in Canada which utilize plastic vent systems must comply with ULC S636.

[Exhaust Vent / Air Intake]

Material

United States

Canada

Exhaust Air Intake Exhaust Air Intake

Schedule 40 PVC

ANSI/ASTM D1785 ULC S636

CSA B137.3

PVC-DWV

ANSI/ASTM D2665

Certified Materials

CSA B181.2

Schedule 40 CPVC

ANSI/ASTM F441

Only

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)

* 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

Single Wall Pipe (2 in. / 3 in.) Elbow
Termination** Bird Screen

Parts # ISVL02xx(UV)/03xx(UV), ISEP02xx/03xx, ISIA0203 ISELL0287(UV)/0387(UV),
ISELL0245/0345 ISELL0287UV/0387UV,
ISTT0220/0320 IASPP02/03

- DuraVent PolyPro®

Parts #

Single Wall Pipe 2PPS-xxBL/3PPS-xxBL,

(2 in. / 3 in.)

2PPS-xxL/3PPS-xxL

Elbow

2PPS-E90(B)L/3PPS-E90(B)L, 2PPS-E45(B)L/3PPS-E45(B)L

Termination**

2PPS-E90(B)L/3PPS-E90(B)L, 2PPS-T(B)L/3PPS-T(B)L

Bird Screen

2PPS-BG/3PPS-BG

** Applicable vent termination are "90° elbow" or "Tee type". Concentric vent termination of polypropylene are prohibited.

[Pipe Cement / Primer] Material United States
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493

Canada ULC S636 Certified Materials
Only

NOTE

Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®

(polyphenylsulfone) in non-metallic

venting system is prohibited.

Venting the Water Heater 17

· Use only solid PVC / CPVC (schedule 40) or PP 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.

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) 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 and EZ2FVK-2), 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.

[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

25 ft- Flex Pipe 2 in.- LE, Flex Vent 2 in.

Product Rigid 45 Elbow Set- LE, 35 ft- Flex Pipe

2 in.- LE

Brand name Living Engineering 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.

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.

18 Venting the Water Heater

- DuraVent®- Flex Through Chimney w/ Air Intake

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

Elbow (3 in.): 3PPS-E45L, 3PPS-E90L,

Exhaust Single-Wall Pipe (3 in.): 3PPS-xxL

& Appliance Adapter for PVC Coupler (2 in.):

Intake* 2PPS-ADL,

Increaser: 2PPS-X3L

- Centrotherm- lnnoFlue® PP

Exhaust

Chimney Kit (3 in.): IFCK03xx, Flexible Pipe PP (3 in.): IFVL03xxx

Intake

Termination**: ISELL0387UV, ISTT0320, Bird Screen: IASPP03

Single Wall Pipe (3 in.): ISVL03xx(UV),

Exhaust ISEP03xx

& Elbow (3 in.): ISELL0387UV, ISELL0345UV,

Intake* ISEL0387, ISEL0345,

Increaser: ISIA0203

* Recommended items. ** Applicable vent termination are "87° elbow" or
"Tee type". Concentric vent termination of polypropylene are prohibited.

6.2.2 Installation Instructions

WARNING
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.

· 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.

NOTE

Do not use the Water Heater to support the vent piping.

· 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.
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. · 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. · When attaching the piping to the Water Heater, use the appropriate primer and cement to ensure a proper seal. [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 pipe: between 12 and 15 in lb

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. · 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 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.

Venting the Water Heater 19

· 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.

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 Water Heater 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

Bird Screen Parts # VT2-PVCS VT3-PVCS IASPP02 IASPP03 2PPS-BG 3PPS-BG

· 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. 3 in.

PVC-2LPT (397100) PVC-3LPT (397101)

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

20 Venting the Water Heater

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, PP, 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) 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.
· Disconnect the electrical power and then adjust the DIP switches according to the vent condition noted in the tables below. 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

· 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 (For PVC/ CPVC/PP material)

· 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:

Maximum equivalent

Vent diameter

vent length*1 HV(H(Voer+irztoicnatla) l)

Maximum # Equivalent of elbows*2 length

2 in.

65 ft (20 m)

90° elbow: 5 ft (1.5 m)

3 in.

150 ft (46 m)

45° elbow: 3 ft (0.9 m)

*1 The maximum vent length includes elbows. *2 Not including the termination.

[DIP Switch Adjustment] Vent length condition

ON = / OFF = DIP switches #7 #8

Less than 33 ft using 2 in. (50 mm) pipe

33 ft or more using 2 in. (50 mm) pipe

Less than 75 ft using 3 in. (75 mm) pipe

75 ft or more using 3 in. (75 mm) pipe

[Vent length Calculation example] Step 1: Vent Diameter
2 in. Step 2: Straight pipe length (Vertical length + Horizontal length)
17 ft Step 3: Number of elbows
90° elbows: 2 45° elbows: 2 Step 4: Calculate equivalent length 90° elbows: 2 × 5 ft = 10 ft 45° elbows: 2 × 3 ft = 6 ft Step 5: Total vent length (Add Step 2 and Step 4 together) 17 ft + 16 ft = 33 ft Step 6: Check [DIP Switch Adjustment] and select DIP switch settings.
33 ft or more using 2 in. (50 mm) pipe] (i.e., turn ON DIP switch #7)

Maximum Vent Length Configurations (For Flex Vent 2 in. Conversion Kit)

Maximum Vent Length Example: · Actual Vent Length = 13 ft (3.9 m) (with DIP
switch set at "Short length" condition) · Actual Vent Length = 25 ft (7.5 m) (with DIP
switch set at "Long length" condition)

Vent length

ON = / OFF = DIP switches #7 #8

Short length 5 ft (1.5 m) - 15 ft (4.5 m)

Long length 15 ft (4.5 m) - 35 ft (10.5 m)

Maximum Vent Length Configurations (For flexible pipe for chimney)

[DuraVent® - Flex Through Chimney w/ Air Intake

(Only 3 in.)] The vent length condition setting depends on

the flexible pipe length, the rigid pipe length and

number of elbows. Calculate an each ventilation

system equivalent length, then adjust the DIP

switch.

ON = / OFF =

Vent length condition

swD#iI7tPch

Maximum equivalent vent length* HV(H(Voer+irztoicnatla) l)

Equivalent length

Short length

< 50 ft (15 m)

Flexible pipe: 1 ft (0.3 m) Rigid pipe:

1 ft (0.3 m)

90° elbow:

Long length

50 ft (15 m)75 ft (22.5 m)

5 ft (1.5 m) 45° elbow:

3 ft (0.9 m)

* The maximum vent length includes elbows.

· Equivalent vent length calculation example: [Example 1] - Vent Size: 3 in. - V (Vertical length): 20 ft - H (Horizontal length): 6 ft - 90° elbow: 2 1 ft × 20 + 1 ft × 6 + 5 ft × 2 = 36 ft
Select "Short length"
[Example 2] - Vent Size: 3 in. - V (Vertical length): 35 ft - H (Horizontal length): 10 ft - 90° elbow: 3 1 ft × 35 + 1 ft × 10 + 5 ft × 3 = 60 ft
Select "Long length"

Venting the Water Heater 21

[Centrotherm® - Flex Through Chimney w/ Air

Intake (Only 3 in.)] The vent length condition setting depends on

the flexible pipe length, the rigid pipe length and

number of elbows. Calculate an each ventilation

system equivalent length, then adjust the DIP

switch.

ON = / OFF =

Vent length condition

swD#iI7tPch

Maximum equivalent vent length*

Equivalent length

Short length Long length

Exhaust vent

(Vertical) + H (Horizontal): < 50 ft (15 m) Air Intake: < 50 ft (15 m)

Flexible pipe: 1 ft (0.3 m) Rigid pipe: 1 ft (0.3 m)

Exhaust vent V (Vertical) + H (Horizontal): 50 ft (15 m)75 ft (22.5 m)
Air Intake:

90° elbow: 5 ft (1.5 m) 45° elbow: 3 ft (0.9 m)

50 ft (15 m)75 ft (22.5 m)

* The maximum vent length includes elbows.

· Equivalent vent length calculation example: [Example 1] - Vent Size: 3 in. - V (Vertical length): 25 ft - H (Horizontal length): 5 ft - 87° elbow: 2 1 ft × 25 + 1 ft × 5 + 5 ft × 2 = 40 ft
Select "Short length"
[Example 2] - Vent Size: 3 in. - V (Vertical length): 30 ft - H (Horizontal length): 10 ft - 87° elbow: 3 1 ft × 30 + 1 ft × 10 + 5 ft × 3 = 55 ft
Select "Long length"

22 Venting the Water Heater

Non-Direct Vent (with Flex Vent 2 in. Conversion Kit EZ2-CK)
Combustion air is supplied from the surrounding indoor air.

Outdoor (with Outdoor Vent Cap VC-6) The Water Heater can be installed outside using the Outdoor Vent Cap (VC-6).

6.3 Select a Vent Type
Direct Vent Combustion air is supplied from the outdoors. Combustion air and exhaust are seperate vent pipes.

Common Vent This Water Heater is suitable for Common Vent System. To make a Common Vent System, refer to the Common Vent installation manual or contact Noritz America at http://support.noritz.com/ or 1-866-766-7489 for details.

Non-Direct Vent (with SV Conversion Kit SV-CK-2) Combustion air is supplied from the surrounding indoor air.

WARNING
Exhaust gasses and combustion air must not be combined into a single PVC pipe using a "Y" fitting.

Venting the Water Heater 23

6.4 Vent Pipe Installation (Direct Vent) 6.4.1 Clearance Requirements from Vent Terminations to Building Openings [When supplying combustion air from the outdoors]
· All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1.

Ref

Description

A Clearance above grade, veranda, porch, deck, or

balcony

B Clearance to window or door that may be opened

Canadian Direct Vent Installations 1 12 in. (30 cm)
6 in. (15 cm) for appliances

12 in. (30 cm) for appliances > 10,000 Btuh (3kW) and

36 in. (91 cm) for appliances

> 100,000 Btuh (30 kW)

C Clearance to permanently closed window

D Vertical clearance to ventilated soffit located

above the terminal within a horizontal distance of

2 feet (61 cm) from the center line of the terminal

E Clearance to unventilated soffit

F Clearance to outside corner

G Clearance to inside corner

H Clearance to each side of center line extended above meter/regulator assembly

I Clearance to service regulator vent outlet

Above a regulator within 3 ft (91 cm)

horizontally of the vertical center

line of the regulator vent outlet to a

maximum vertical distance of 15 ft

(4.5 m)

J Clearance to non-mechanical air supply inlet to

6 in. (15 cm) for appliances

building or the combustion air inlet to any other

appliance

12 in. (30 cm) for appliances

> 10,000 Btuh (3kW) and

K Clearance to a mechanical air supply inlet L Clearance above paved sidewalk or paved
driveway located on public property M Clearance under veranda, porch, deck, or balcony

36 in. (91 cm) for appliances > 100,000 Btuh (30 kW) 6 ft (1.83 m)
7 ft (2.13 m) 12 in. (30 cm)

US Direct Vent Installations 2 12 in. (30 cm)
6 in. (15 cm) for appliances 9 in. (23 cm) for appliances > 10,000 Btuh (3kW) and 12 in. (30 cm) for appliances
> 50,000 Btuh (15 kW) * * * * * *
*
6 in. (15 cm) for appliances 9 in. (23 cm) for appliances > 10,000 Btuh (3kW) and 12 in. (30 cm) for appliances
> 50,000 Btuh (15 kW) 3 ft (91 cm) above if within
10 ft (3 m) horizontally * *

1 In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code 2 In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and
serves both dwellings. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. * Clearance in accordance with local installation codes and the requirements of the gas supplier. Clearance to opposite wall is 24 in. (60 cm).
24 Venting the Water Heater

6.4.2 Horizontal Vent Termination
For Horizontal Vent Termination - PVC/CPVC Material Only · Use a condensation drain if necessary. · In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refer to Technical Bulletin TB 010606 for full installation instructions.
Venting the Water Heater 25

A(Wltherenna3teftH(o0r.9izomn)tdailsVtaenncteTberemtwineaetnioInnt-aPkVeCa,nCdPEVxChaoursPtPcaMnnatoetrbiael ensured.)
WARNING
· If the distance between the air inlet and exhaust vent terminations is too short, the Water Heater will draw in the exhaust gases through the intake. There is a risk of inadequate combustion air for the Water Heater, thus increasing Carbon Monoxide (CO) emissions and noise due to vibration.
· Termination elbows must be oriented vertically, pointing directly downward. Attempts to prevent exhaust air from entering the air inlet by angling termination elbows in directions other than directly downward will increase the risk of freezing.
· Reversing the air intake and exhaust pipes is not allowed. Carbon Monoxide (CO) emissions and noise due to vibration will increase.
· Insert the bird screen into the 90° elbow installed vertically downward. · Intake and exhaust should face the same direction. Intake and exhaust should keep the same pressure zone.
NOTE Do not use Hood termination (PVT-HL).
26 Venting the Water Heater

For Horizontal PVC Concentric Termination - PVC/CPVC Material Only · The concentric termination may be shortened, but not lengthened from its original factory supplied length. · 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination.
Maintain the same vent pipe diameter from the Water Heater flue to the termination. · Use a condensation drain if necessary. · In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refer to Technical Bulletin TB 010606 for full installation instructions.
For Universal Concentric Vent Kit
Venting the Water Heater 27

6.4.3 Vertical Vent Termination
For Vertical Vent Termination - PVC, CPVC or PP Material
28 Venting the Water Heater

For Vertical PVC Concentric Termination - PVC/CPVC Material Only · The concentric termination may be shortened, but not lengthened from its original factory supplied length. · 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination.
Maintain the same vent pipe diameter from the Water Heater flue to the termination. · Use a condensation drain if necessary. · In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refer to Technical Bulletin TB 010606 for full installation instructions.
Venting the Water Heater 29

6.5 Vent Pipe Installation (Non-Direct Vent) 6.5.1 Clearance Requirements from Vent Terminations to Building Openings [Other than Direct Vent]
· All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1.

Ref

Description

Canadian Non-Direct Vent Installations 1 US Non-Direct Vent Installations 2

A Clearance above grade, veranda, porch, deck, or balcony

12 in. (30 cm)

B Clearance to window or door that may be

6 in. (15 cm) for appliances

opened

12 in. (30 cm) for appliances

4 ft (1.2 m) below or to side of

> 10,000 Btuh (3kW) and

opening;

1 ft (300 mm) above opening

36 in. (91 cm) for appliances

> 100,000 Btuh (30 kW)

C Clearance to permanently closed window

D Vertical clearance to ventilated soffit located

above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the

terminal

E Clearance to unventilated soffit

F Clearance to outside corner

G Clearance to inside corner

H Clearance to each side of center line extended above meter/regulator assembly

I Clearance to service regulator vent outlet

Above a regulator within 3 ft (91 cm)

horizontally of the vertical center

line of the regulator vent outlet to a

maximum vertical distance of 15 ft

(4.5 m)

J Clearance to non-mechanical air supply inlet to

6 in. (15 cm) for appliances

building or the combustion air inlet to any other

appliance

12 in. (30 cm) for appliances

4 ft (1.2 m) below or to side of

> 10,000 Btuh (3kW) and

opening;

1 ft (300 mm) above opening

36 in. (91 cm) for appliances

> 100,000 Btuh (30 kW)

K Clearance to a mechanical air supply inlet

6 ft (1.83 m)

3 ft (91 cm) above if within 10 ft (3 m) horizontally

L Clearance above paved sidewalk or paved driveway located on public property

7 ft (2.13 m)

M Clearance under veranda, porch, deck, or balcony

12 in. (30 cm)

30 Venting the Water Heater

6.5.2 Consideration for Installation
DANGER
· When installing this Water Heater in an area with a large amount of lint such as a commercial Laundromat, direct vent ("-DV") system must be used. The "-SV" configuration (using SV Conversion Kit) and Flex Vent 2 in. Conversion Kit are prohibited.
· When installing this Water Heater in a mobile home, all combustion must be drawn directly from the outdoors. The "-SV" configuration (using SV Conversion Kit) and Flex Vent 2 in. Conversion Kit are prohibited.
For SV Conversion Kit
WARNING
Failure to change DIP switch #3 and use SV Conversion Kit SV-CK-2 could result in a fire or explosion causing property damage, personal injury or death. Refer to the instructions provided with the conversion kit for additional details. · Disconnect the erectrical power and then turn ON DIP switch #3 if combustion air will be supplied from the indoors. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switch. 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.

For Flex Vent 2 in. Conversion Kit Flex Vent 2 in. Conversion Kit

1. Secure the "Flex Vent 2 in. Conversion Kit" to top of the Water Heater. (Refer to the instructions provided with "Flex Vent 2 in. Conversion Kit" for additional detail.)

NOTE

Flex Vent 2 in. Conversion Kit must be installed in the proper direction as

shown above.

2. Disconnect the electrical power and then turn ON DIP switch #2 and #3. 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.

· SV Conversion Kit SV-CK-2 is required for the air intake.
· Noritz recommends a carbon monoxide alarm installed in same room space as Water Heater when supplying combustion air from the indoors.
WARNING
To prevent possible personal injury or death due to asphyxiation, common venting with other manufacturer's induced draft appliances is not allowed.

Venting the Water Heater 31

6.5.3 Combustion Air

NOTE

Provide adequate combustion air so as to not create negative pressure

within the building.

· Supply combustion air to the Water Heater as per the National Fuel Gas Code, ANSI Z223.1- latest edition and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1 - latest edition.
· A minimum free area of each opening:

[NRCR111DV (GQ-C3260WXQ-FF US)]

Indoor make up

air is provided example

Outdoor Direct or Vertical ducts

make

example

up air is Horizontal ducts

provided

example

200 in.² 20 in. (W) × 10 in. (H)
50 in.² 10 in. (W) × 5 in. (H)
100 in.² 20 in. (W) × 5 in. (H)

[NRCR92DV (GQ-C2660WXQ-FF US)]

Indoor make up

165 in.²

air is provided example 20 in. (W) × 8 1/4 in. (H)

Outdoor Direct or Vertical ducts

41 in.²

make

example 10 in. (W) × 4 1/10 in. (H)

up air is Horizontal ducts

82 in.²

provided

example 20 in. (W) × 4 1/10 in. (H)

(e.g. SV Conversion Kit installation) · If the Water Heater is installed in a mechanical
closet, a minimum of permanent clearance of 4 in. or more in front of the Water Heater is required. In order to facilitate maintenance and repair, a minimum clearance (24 in. or more) should be met. · If combustion air will be provided through a duct, size the duct to provide as below. - NRCR111DV (GQ-C3260WXQ-FF US):
70 ft3 of fresh air per minute - NRCR92DV (GQ-C2660WXQ-FF US):
58 ft3 of fresh air per minute
32 Venting the Water Heater

6.5.4 Horizontal Vent Termination
· Use a condensation drain if necessary. · In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refer to Technical Bulletin TB 010606 for full installation instructions.
Venting the Water Heater 33

6.5.5 Vertical Vent Termination
For SV Conversion Kit
34 Venting the Water Heater

For Flex Vent 2 in. Conversion Kit
WARNING
This Water Heater is suitable only for vertical vent.
Venting the Water Heater 35

6.6 Outdoor Installation
· When installing this Water Heater outdoors, the "Outdoor Vent Cap (VC-6)" must be used.
· Refer to the instructions provided with Outdoor Vent Cap for additional detail.
· Disconnect the electrical power and then turn ON DIP switch #2 if outdoor installation. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switch. 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.
36 Venting the Water Heater

7 Connecting the Gas Supply

Follow the instructions from the gas supplier.
WARNING
The sizing and installation of the gas system for this Water Heater, as with any gas appliance, is the sole responsibility of the installer. The installer must be professionally trained to do such work and must always follow all local and national codes and regulations.
Gas Type The gas type indicated on the Water Heater's rating plate (NG or LP) must match the type of gas being supplied to the Water Heater. Gas Conversions · If the supplied gas does not match the gas type
on the rating plate, contact your water heater supplier for a replacement Water Heater with the proper gas type. · If a gas conversion is needed, there are conversion kits available for some models. · The conversion kit shall be installed by a qualified service agency in accordance with the manufacturer's instructions and all applicable codes and requirements of the authority having jurisdiction. The qualified service agency is responsible for the proper installation of this kit. Improper installation of this kit will void the Noritz America Limited Warranty. Conversion kits will only be shipped directly to the Distributor or Agency performing the conversion.

Pressure · Check the gas supply pressure immediately
upstream at a location provided by the gas company. · Supplied gas pressure must be within the limits shown in the specifications section with all gas appliances operating.
WARNING
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment. Low gas pressure may cause a loss of flame or ignition failure at other appliances in the home, which may result in unburned gas in the home. Serious accidents such as fire or explosion may result.
Pressure Test The appliance and its gas connections must be leak tested before placing the appliance in operation. · Test at test pressures equal to or less than ½ psi
(3.5 kPa). · The appliance must be isolated from the gas
supply piping system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system. · If test pressures are in excess of 1/2 psi (3.5 kPa), the appliance and its individual shut off valve must be completely disconnected from the gas supply piping system during the test process.

Meter · The gas meter must be sized properly for the
Water Heater and other gas appliances to operate properly. · Select a gas meter capable of supplying the entire Btu/h demand of all gas appliances in the building.

Measuring Gas Pressure In order to check the gas supply pressure to the Water Heater, a tap is provided on the gas inlet. 1. Remove the 9/32 in. hex head
/Philips screw from the tap.

Regulators
WARNING
· Ensure that all gas regulators used are operating properly and providing gas pressures within the specified range of the Water Heater being installed.
· Excess gas inlet pressure may cause serious accidents.

2. Connect a manometer using a silicon tube. 3. Open up at least two fixtures with hot water
side fully. 4. Hold in the "Maximum
Burner Set Button" on the circuit board.

Connecting the Gas Supply 37

Pipe Sizing · A gas shut off valve must be installed on the
supply line. · Gas piping shall be in accordance with local utility
company requirements and/or in the absence of local codes, use the latest edition of National Fuel Gas Code (NFPA54GC), ANSI Z223.1. In Canada, use the latest edition of CSA B149.1, Natural Gas and Propane installation code. · Size the gas line according to total Btu/h demand of the building and length from the meter or regulator so that the following supply pressures are available even at maximum demand.

Supply Pressure

Natural Gas

LP Gas

Min 3.5 in. W.C. 8 in. W.C.

Max 10.5 in. W.C. 14 in. W.C.

WARNING
Gas pressures below the required minimum pressure may result in ignition failure, personal injury or death.
Flexible Connectors Flexible gas lines are not recommended unless the minimum inside diameter is ¾ in. or greater and the rated capacity of the connector is equal to or greater than the Btu/h demand of the Water Heater.
Reference Tools & Sample Calculations
NOTICE
The tables and samples below are for reference only. The professional sizing and installing the gas line should always run the appropriate calculations before all installations.

[ACpaalcrutilaaltsioent oEfxsaimzinpglet]ables are printed on page 40. In cases where these tables are not appropriate, refer to the NFPA. 1. Draw a sketch of a piping system.
Enter the system information. (e.g.)

2. · Determine the gas type used and supply gas Pressure, and enter it.
· Determine the piping material and enter it to the below.
· Select the appropriate pipe sizing table from page 40 and enter it to the below.

(e.g.)

Gas type: Supply gas pressure: Piping material: Table used: Pressure drop:

Natural 6 in. W.C.
Sch 40 steel 2
1.0 in. W.C.

Gas type: Supply gas pressure: Piping material: Table used: Pressure drop:

3. · On the sketch, label the section of pipe from the point of delivery (meter or regulator) to the first tee as Section 1.
· Label the section from the first tee to the second tee as Section 2, and label the section from the first tee to the third tee as Section 3. Use similar section numbers for additional sections.
(e.g.)

38 Connecting the Gas Supply

4. · Enter the demand is the amount of gas flowing through a section of pipe in the table below. - For natural gas, use total Btu/h rating/1000 (ft3/h). - For propane, use total Btu/h.
· For each section, determine the longest piping from the point of delivery to the furthest appliance through each section. Enter this length for all pipe sections in the table below.
· Round up to the lengths in the appropriate table on page 40. Read across until a capacity equal to or greater than the required demand for the section is found. Read up to find the size. Repeat for each section of piping. Enter this size in the table below.

(e.g.) Section 1 2 3 4 5

Demand 409.9 299.9 110

The longest length 45 ft 35 ft 45 ft

Size 1 in. 1 in. 3/4 in.

Section

Demand

The longest length

Size

5. · Enter the input rating for each appliance in the table below. - For natural gas appliances, enter the input rating in Btu/h/1000 (ft3/h). - For propane appliances, enter the input rating in Btu/h.
· Enter the outlet length from each appliance to the point of delivery in the table below.
· Round up to the lengths in the appropriate table on page 40. Read across until a capacity equal to or greater than the required demand for the section is found. Read up to find the size. Repeat for each appliance. Enter this size in the table below.

(e.g.) Appliance Outlet A Outlet B Outlet C Outlet D
Appliance Outlet A Outlet B Outlet C Outlet D

Demand 35 75
199.9 100 Demand

Outlet length 45 ft 40 ft 35 ft 35 ft Outlet length

Size 1/2 in. 1/2 in. 3/4 in. 1/2 in.
Size

Final Check

1. Turn on and operate all gas appliances including the Water Heater.
2. Check the inlet pressure at each appliance shall be such that the supply pressure at the appliance is greater than or equal to the minimum pressure required by the appliance.

NOTE

If all appliances are not receiving the minimum inlet pressure, the

gas piping system may need to be

changed.

Connecting the Gas Supply 39

[Gas pipe sizing tables] · These tables are for reference only. Consult gas pipe manufacturer for actual pipe capacities. · It is an example of Schedule 40 Metallic Pipe. · (Only Table 1- 4) Values in Table are in ft of Gas per Hour. Contact your gas supplier for Btu/ft ratings. For simplification
of your calculations, 1 ft of Gas is approximately equivalent to 1,000 Btu.

1. Maximum Natural Gas Delivery Capacity (For Less than 6 in. W.C. initial supply pressure)

Pipe Size 1/2 in.

10 ft (3 m)
172

20 ft (6 m)
118

0.5 in. W.C. Pressure Drop

Length (including fittings)

30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft

(9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m)

3/4 in. 1 in.

360 247 199 170 151 137 126 117 110 104

678 466 374 320 284 257 237 220 207 195 173 157 144 134

1 1/4 in. 1,390 957 768 657 583 528 486 452 424 400 355 322 296 275 1 1/2 in. 2,090 1,430 1,150 985 873 791 728 677 635 600 532 482 443 412

2 in. 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020 928 854 794 2 1/2 in. 6,400 4,400 3,530 3,020 2,680 2,430 2,230 2,080 1,950 1,840 1,630 1,480 1,360 1,270

2. Maximum Natural Gas Delivery Capacity (For 6 - 7 in. W.C. initial supply pressure)

Pipe Size 1/2 in. 3/4 in. 1 in. 1 1/4 in. 1 1/2 in. 2 in. 2 1/2 in.

10 ft (3 m)
250 524 986 2,030 3,030 5,840 9,310

20 ft (6 m)
172 360 678 1,390 2,090 4,020 6,400

1.0 in. W.C. Pressure Drop

Length (including fittings)

30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft

(9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m)

138 118 105

289 247 219 199 183 170 160 151 134 121 111 104

544 466 413 374 344 320 300 284 252 228 210 195

1,120 957 848 768 707 657 617 583 516 468 430 400

1,680 1,430 1,270 1,150 1,060 985 924 873 774 701 645 600

3,230 2,760 2,450 2,220 2,040 1,900 1,780 1,680 1,490 1,350 1,240 1,160

5,140 4,400 3,900 3,530 3,250 3,020 2,840 2,680 2,380 2,150 1,980 1,840

3. Maximum Natural Gas Delivery Capacity (For 7 - 8 in. W.C. initial supply pressure)

Pipe Size 10 ft (3 m)
1/2 in. 364 3/4 in. 762 1 in. 1,440 1 1/4 in. 2,950 1 1/2 in. 4,420 2 in. 8,500 2 1/2 in. 13,600

20 ft (6 m)
250 524 986 2,030 3,030 5,840 9,310

2.0 in. W.C. Pressure Drop

Length (including fittings)

30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft

(9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m)

201 172 153 138 127 118 111 105

420 360 319 289 266 247 232 219 194 176 162 151

792 678 601 544 501 466 437 413 366 332 305 284

1,630 1,390 1,230 1,120 1,030 957 898 848 751 681 626 583

2,440 2,090 1,850 1,680 1,540 1,430 1,350 1,270 1,130 1,020 938 873

4,690 4,020 3,560 3,230 2,970 2,760 2,590 2,450 2,170 1,970 1,810 1,680

7,480 6,400 5,670 5,140 4,730 4,400 4,130 3,900 3,460 3,130 2,880 2,680

4. Maximum Natural Gas Delivery Capacity (For 8 - 10.5 in. W.C. initial supply pressure)

3.0 in. W.C. Pressure Drop Length (including fittings)
Pipe Size 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft

(3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m)

1/2 in.

454 312 250 214 190 172 158 147 138 131 116 105

3/4 in. 949 652 524 448 397 360 331 308 289 273 242 219 202 188 1 in. 1,790 1,230 986 844 748 678 624 580 544 514 456 413 380 353

1 1/4 in. 3,670 2,520 2,030 1,730 1,540 1,390 1,280 1,190 1,120 1,060 936 848 780 726 1 1/2 in. 5,500 3,780 3,030 2,600 2,300 2,090 1,920 1,790 1,680 1,580 1,400 1,270 1,170 1,090
2 in. 10,600 7,280 5,840 5,000 4,430 4,020 3,700 3,440 3,230 3,050 2,700 2,450 2,250 2,090

2 1/2 in. 16,900 11,600 9,310 7,970 7,070 6,400 5,890 5,480 5,140 4,860 4,300 3,900 3,590 3,340

5. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of Btu/h

Pipe Size 1/2 in. 3/4 in. 1 in. 1 1/4 in. 1 1/2 in. 2 in.

10 ft (3 m)
291 608 1,150 2,350 3,520 6,790

20 ft (6 m)
200 418 787 1,620 2,420 4,660

30 ft (9 m)
160 336 632 1,300 1,940 3,750

0.5 in. W.C. Pressure Drop

Length (including fittings)

40 ft 50 ft 60 ft 80 ft 100 ft

(12 m) (15 m) (18 m) (24 m) (30 m)

137

122

110

101

287

255

231

212

197

541

480

434

400

372

1,110

985

892

821

763

1,660 1,480 1,340 1,230 1,140

3,210 2,840 2,570 2,370 2,200

125 ft (38 m)
89 185 349 716 1,070 2,070

150 ft (45 m)
84 175 330 677 1,010 1,950

175 ft (53 m)
74 155 292 600 899 1,730

200 ft (60 m)
67 140 265 543 814 1,570

40 Connecting the Gas Supply

8 Connecting the Water Supply
· Installation and service must be performed by a qualified plumber. · In the Commonwealth of Massachusetts, this product must be installed by a licensed plumber or gas fitter in
accordance with the Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. · Observe all applicable codes. · Noritz recommends to install insulation to the hot water line and the hot water return line for comfort and
energy saving.
8.1 Overview of the Recirculation System
· With a Recirculation System, the water from the Water Heater to the fixtures can be warmed up in advance. You can get hot water to your fixtures more quickly with less waste of water.
· See the Owner's Guide for more information about what you can do. · Perform water treatment properly because Scale build-up is more likely to occur in a Recirculation System. · (Only when conforming to California Code of Regulations Title 24 Part 6)
Install the plumbing in accordance with the regulation. · Only one recirculation loop shall be installed in the recirculation system.
[With a dedicated return line] · (Only when conforming to California Code of Regulations Title 24 Part 6)
- Change the Recirculation setting. (See page 59) - Install On-demand Switch and Thermo-sensor. (See page 50)
Connecting the Water Supply 41

[With the Crossover Valve] · Connect the connector marked "Crossover". Refer to page 51 for the location of the connector. · Minimum setting temperature is 120°F (49°C) · Noritz recommends using Watts product. (Sensor Valve Kit : 596816)
Model number or specification subject to change at manufacturer's discretion. Be sure to contact the manufacturer.

NOTE

Crossover valve passes cold water, therefore Water Heater will operate and recirculate automatically even without direct hot water usage.

8.2 Installation 8.2.1 Guidelines
Installation location · If the Water Heater is installed in a closed water
supply system, such as one having a backflow preventer on the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or a local plumbing inspector on how to control this situation..
42 Connecting the Water Supply

· If installing the Water Heater on a roof: If the Water Heater is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to the Water Heater does not drop below 29 psi. It may be necessary to install a pump system to ensure that the water pressure is maintained at this level or to decrease the flow rate by adjusting the water fixture. Check the pressure before putting the Water Heater into operation. Failure to supply the proper pressure to the Water Heater may result in noisy operation, shorter lifetime of the Water Heater, and may cause the Water Heater to shut down frequently.

Potable water · Piping and components connected to the Water
Heater shall be suitable for use with potable water. · Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water. · A Water Heater used to supply potable water may not be connected to any heating system or components previously used with a nonpotable water heating appliance.

Maximum accept length for recirc.

Pipe length of hot water supply line and hot water return line and fittings should be within following table.

Pipe Diameter

3/4 in.

1/2 in.

Total

500 ft (152 m) 200 ft (61 m)

Valve · A pressure relief valve must be installed near the
hot water outlet that is rated in accordance with and complying with either The Standard for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22, or The ANSI/ ASME Boiler and Pressure Vessel Code, Section IV (Heating Boilers). · A pressure relief valve must be capable of an hourly Btu rated temperature steam discharge capacity of 199,900 Btu/h. Multiple valves may be used. The pressure relief capacity must not exceed 150 psi. · Do not install a shutoff valve between a relief valve and the Water Heater. The relief valve must be installed such that the discharge will be conducted to a suitable place for disposal when relief occurs. · No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be installed to allow complete drainage of both the valve and the line. · If this Water Heater is installed with a separate storage vessel, the separate vessel must have its own temperature and pressure relief valve. · Temperature and pressure relief valve must also comply with The Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 (in the U.S. only). · A temperature relief valve is not required, but if one is used, do not install the valve with the probe directly in the flow of water. This may cause unwarranted discharge of the valve. · When the system requires water for space heating at temperatures higher than required for other uses, a means such as a mixing valve shall be installed to temper the water for those uses in order to reduce scald hazard potential.

Connnecting water supply

· Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.
· Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping.

NOTE

· Do not use piping with a diameter smaller than the coupling.

· Avoid using joints as much as

possible to keep the piping simple.

· Avoid piping in which an air holdup

can occur.

Cold water supply

· Be sure to check the water pressure. - In order for the client to use the Water Heater comfortably, 15 to 150 psi* (103.4 to 1034 kPa) of pressure is needed from the water supply. * Recommended 50 to 80 psi for maximum performance. - If the water pressure is low, the Water Heater cannot perform to its full capability, and may become a source of trouble for the client. - If the water pressure is low, local boiling will occur inside the Water Heater causing abnormal sounds and decreasing the durability of the Heat Exchanger. - If the water pressure is too high, use a Pressure Reducing Valve and a Water Hammer Arrester.
· Recommend installing a pressure meter on the inlet.
· Mount a check valve (near the inlet) when required by local code.
· Mount a shut off valve (near the inlet).

NOTE

Do not use PVC, iron, or any piping which has been treated with

chromates, boiler seal or other

chemicals.

Hot water supply

· Try to make the piping as short as possible. The longer the piping, the greater the heat loss.
· Use mixing valves with low water flow resistance. · Use shower heads with low pressure loss. · If the Maximum flow of water cannot be obtained
with the supplied water pressure and/or the water supply pressure is below the recommended pressure, use a pump to increase the pressure and water flow. · Noritz recommends the installation of a wye pattern strainer downstream on the hot water supply to prevent loose scale from accumulating and clogging fixtures.

NOTE

Do not use lead, PVC, iron or any piping which has been treated with

chromates, boiler seal or other

chemicals.

Connecting the Water Supply 43

8.2.2 Freeze Prevention
Perform the following insulation measures for prevention of freezing. · Take appropriate heat insulation measures (e.g.
wrapping with heat insulation materials, using heat tape, electric heaters, solenoids, or pipe covers) according to the climate of the region to prevent the plumbing external to the Water Heater from freezing. The freeze prevention heaters will not prevent this plumbing from freezing. · Make sure that there are no water leaks from the cold and hot water supply lines and the hot water return line, then insulate the pipes completely. · Be sure to also completely insulate the water supply valve and the cold water, hot water and hot water return connections on the Water Heater. · For temporary freeze protection measures, refer to the Owner's Guide.

Outdoor Installation · Freezing is prevented within the Water Heater
automatically unless the outside temperature without wind is below -4°F (-20°C). · If this model is installed in an area where the outside temperature can approach freezing conditions of -4°F (-20°C) or below, then additional freeze protection measures must be used.

NOTE

In order for the freeze prevention heaters to operate, the Water Heater

must connect the electrical power at

all times.

Indoor Installation

· Freezing is prevented within the Water Heater automatically unless the outside temperature without wind is below -30°F (-35°C).
· If this model is installed in an area where the outside temperature can approach freezing conditions of -30°F (-35°C) or below, then additional freeze protection measures must be used.

NOTE

The room temperature must be greater than 32°F (0°C) to prevent

freezing and the room inside must not

have negative pressure.

44 Connecting the Water Supply

8.3 Water Treatment

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 to be taken based on the water hardness level according to the below table.

Treatment Guidelines

Type of Water Hardness Level Treatment Device* Flush Frequency**

Soft Slightly Hard

0-1 gpg (0-17 mg/L)
1-3 gpg (17-51 mg/L)

None

Moderately Hard

3-7 gpg (51-120 mg/L)

Hard Very Hard

7-10 gpg (120-171 mg/L)
10-12 gpg (171-200 mg/L)

Scale Shield or Water Softener

Once a Year***

Extremely Hard

> 12 gpg (> 200 mg/L)

* When selecting a treatment device, you must consult with the device's spec sheet and installation manual for guidelines and limitations. Not all water supplies are compatible. A water test may be required.
** Install Noritz Isolation Valves to allow for flushing.
*** Flushing is required if a water treatment device is not installed.

NOTE

Damage to the Water Heater as a result of the items 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 Water Quality List on page 12.)

· The Remote Controller has displayed a "C1# (Service Reminder)" indicating Scale Build-up, but

the Heat Exchanger has not been flushed.

Water treatment device · The water must be treated with either the Noritz Scale Shield or a water softener. · Water softeners may be regulated by the local water jurisdiction, consult with the manufacturer for code,
sizing, and installation guidelines. The below diagram is for reference only. For more information about Scale Shield, contact Noritz America at http://support.noritz.com/ or 1-866-766-7489.

The illustration is an example. Check with the actual Water Heater about the position of piping, and form.
Connecting the Water Supply 45

Flushing the Heat Exchanger · The Heat Exchanger regularly needs to be flushed
to prevent damage from Scale Build-up. Refer to the "Procedure for flushing the Heat Exchanger" on page 69 or contact Noritz America for more information. (http://support.noritz.com/ or 1-866-766-7489)
About the Service Reminder · This Water Heater is equipped with an automatic
service reminder to announce for flushing the Heat Exchanger. · If the service reminder is selected to ON, the code "C1#*" will displayed on the Remote Controller after the set time period has been reached. When the code is displayed, the Heat Exchanger needs to be flushed to prevent damage from Scale Build-up. * Noritz recommends to flush the Heat Exchanger
when the code "C1#" appears. # = 1, 2, 3, 4 ... 9 · The factory default of this service reminder is disable. If desired, the customer or installer needs to enable the service reminder (connect the red connector marked "SERVICE REMINDER").
[Procedure when turning the service reminder ON] 1. Remove the front cover (4 screws). 2. Connect the red connector marked "SERVICE
REMINDER" near the Circuit Board.

[FWlushhenthtehHeecaotdEex"cCh1an#"gearp. pears:] Refer to the "Procedure for flushing the Heat Exchanger" on page 69. After completing the flushing, the code will be reset.

To deactivate the code "C1#", disconnect the red connector marked "SERVICE REMINDER". The service reminder will be disabled.

NOTE

Need to be flushed the Heat Exchanger in this case.

3. Reattach the front cover (4 screws).
46 Connecting the Water Supply

References

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