Noritz N-0842mc-dv User manual

Potential dangers from accidents during installation and use are divided into the following three

categories. Closely observe these warnings, they are critical to your safety.

Prohibited Disconnect

Power Ground Be sure to do

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result

causing property damage, personal injury or death.

NORITZ AMERICA

CORPORATION

Installation Manual

CONDENSING TANKLESS GAS WATER HEATER

N-0842MC-DV (Indoor Installation)

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.

DANGER

WARNING

CAUTION

SBA8223

Rev. 04/09

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 warranty.

•

Check that the installation was done properly in accordance with this Installation Manual upon completion.

•

After completing installation, please 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.

CAUTION

*SBA8223 C*

FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME AP-

PLICATIONS.

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 CSA

B149.1, Natural Gas and Propane Installation Code (NSCNGPIC).

When applicable, installation must conform with the Manufactured Home Con-

struction 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.

Low NOx

Approved by

SCAQMD

CERTIFIED

Accepted For Use

City of New York

Department of Buildings

MEA 19-03-E

Included Accessories

The following accessories are included with the unit.

Check for any missing items before starting installation.

Q’tyShapePart

Tapping Screw 1

each

Part Shape Q’ty

Remote Controller

(See p. 23)

Remote Controller

Cord (10ft)

Optional Accessories

The accessories listed below are not

included with the units, but may be necessary

for installation.

Q’tyShapePartPart Shape Q’ty

Remote Controller

Cord (26 ft)

Quick Connect

Cord 11

Isolation Valves

(includes pressure

relief valve)

Owner's Guide, Warranty,

Installation Manual

(this document)

System Controller 1

Bird Screen for 4" PVC

VT4-PVCS

Bird Screen for 3" PVC

VT3-PVCS 2

3" PVC Terminal

VK3-H-PVC 1

Pipe Cover

(PC-3S)

Quick Connect

Cord

Remote Controller Cord Gas Supply Piping

Cold Water Supply

Hot Water

Remote Controller

Terminal Block

Cord

Connector

Cord

Connector

Quick Connect Multi System Installation

• The Quick Connect Multi System allows the installation of two units together utilizing only the Quick

Connect Cord.

Typical Plumbing

The Quick Connect Cord is 6 ft. long. Install the units 2-18" apart from each other to ensure the

cord will be able to reach between the units. (See Typical Plumbing diagram).

(If the distance between the two units is too great, not only will the cord not be able to reach,

but the water temperature may also become unstable because of the difference in pipe length

between the two units).

* When connecting two units, use only a

single remote controller.

Note: Connect the remote

controller to only one

of the units.

System Diagram

•Insulate the hot water piping to prevent heat loss. Insulate and apply heating materials to the cold

water supply piping to prevent heat loss and freezing of pipes when exposed to excessively cold

temperatures.

Union

Make this distance as short

as possible.

* The hot water temperature

will become unstable as the

pipe length increases.

Distance at center: 20.3 - 36.3 in.

Quick Connect

Cord

Union

Gas Valve

Union

Shutoff

Valve

Shutoff Valve

Hot Water

Shutoff

Valve

Cold Water

Distance on sides

2 - 18 in.

Leave enough clearance around the plumbing to

apply insulation. It will be necessary to add

bends to the piping to ensure that this clearance

is available.

Size the piping to allow for the maximum

flow rates of the units.

4. Before Installation

Checkup

• Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary.

DANGER

Do Not Use Equipment 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.

WARNING

CAUTION

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 Btuh for this unit.

Check the Power

•The power supply required is 120VAC, at 60Hz.

Using the incorrect voltage may result in fire or electric shock.

Use Extreme Caution if Using With a Solar Pre-Heater

• Using this unit 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.

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 "Vent Pipe Installation" 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.

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.

199,900

186,000

3.6

3.35 3.35

3.6

192,700

179,300

199,900 BTU

11,000 BTU 222

4.0

0.75 3.35

10.5

840

10.3a-2007

15 150

4.3a-2007

N-0842MC-DV

5. Choosing Installation Site

* Locate the appliance in an area where leakage from the unit or connections will not result in damage

to the area adjacent to the appliance or to the lower floors of the structure. When such locations

cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed

under the appliance. The pan must not restrict combustion air flow.

•Locate the vent terminal so that there are no obstacles around the termination and so that ex-

haust can't accumulate. Do not enclose the termination with corrugated metal or other materials.

•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.

Using the incorrect voltage may result in fire or cracking.

•Avoid installation in places where dust or debris will accumulate.

Dust may block the air-supply opening, causing the performance of the

device fan to drop and incomplete combustion to occur as a result.

•Avoid installation in places where special chemical agents

(e.g., hair spray or spray detergent) are used.

Ignition failures and malfunction may occur as a result.

• Carbon Monoxide Poisoning Hazard. Do not install this water heater in a

recreational vehicle or on a boat.

•The water heater is designed for indoor installation only. Never install it

outdoors or in a bathroom, it may be damaged or a fire may be caused.

•Consult with the customer concerning the location of installation.

• Install the water heater in an area that allows for the proper clearances

to combustible and noncombustible construction. Consult the rating

plate on the appliance for proper clearances.

•Do not install the water heater in a place where it may be threatened by

falling objects, such as under shelves.

• The water heater must be installed in a place where supply and exhaust

pipes can be installed as directed.

•Do not install the water heater where the exhaust will blow on outer

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.

Prohibited

DANGER

WARNING

CAUTION

Prohibited

•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 equipment.

• Install in a location where the exhaust gas flow will not be

affected by fans or range hoods.

• Take care that noise and exhaust gas will not affect neighbors.

•Before installing, make sure that the exhaust flue termination will

have the proper clearances according to the National Fuel Gas

Code (ANSI Z223.1).

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.

Be sure to do

Prohibited

CAUTION

The Commonwealth of Massachusetts: The water heater can be used for domestic hot water only and not

in a combination of domestic and space heating.

6. Installation Clearances

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, to the National Fuel Gas Code ANSI

Z223.1/NFPA 54 – latest edition. In Canada, see NSCNGPIC for detailed requirements.

WARNING

Item

Distance from combustibles

•Maintain the following clearances

from both combustible and

non-combustible materials.

•There must be a clearance of 24" or

more in front of the Flue terminal.

• This restriction will not be applied to an

area where an effective shield makes a

clearance of 24" or more in front of the

exhaust outlet.

Check Illustration

•If possible, leave 8" or more on either

side of the unit to facilitate inspection.

•If possible, leave 24" or more in front of

the unit to facilitate maintenance

and service if necessary.

•If possible, leave 3" or more above and

below the vent pipe to facilitate inspec-

tion and repair if necessary

Securing of space for

repair/inspection

24" or

8" or

Outdoor Clearances to Opening

into Any Building

Distance from

the side

12"

2" or

12"

or more

12" or

There must be no

building opening

within this area.

12" or

Flue terminal

or more

4" or

Clearance Requirements from Vent Terminations to Building Openings

*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 NSCNGPIC.

Vent Terminal

Clearance

A= Above grade, veranda, porch, deck,

or balcony

B= Window or door that may be opened 12" (36")

C= Permanently closed window

Vertical clearance to ventilated soffit

located above the terminal within a

horizontal distance of 2 feet from the

center of the terminal

E= Unventilated soffit *

F= Outside corner *

G= Inside corner *

H= Each side of center line extended

above meter/regulator assembly

3' within a height 15' above

meter/regulator assembly

I= Service regulator vent outlet 3'

Nonmechanical air supply inlet or

combustion air inlet to any other

appliance

12" (36")

K= Mechanical air supply inlet 3' above if within 10' (6')

L= Above paved sidewalk or paved

driveway located on public property

Under veranda, porch, deck, or

balcony

(7' ***)

()= indicates clearances required in Canada

*Maintain clearances in accordance with local installation codes and the requirements of the gas supplier

***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.

* (12"- Canada Only****)

12" (12")

Air Supply Inlet

Area Where Terminal

is Not Permitted

7. Installation

Securing to the wall

IllustrationCheck

4. Drill holes for the remaining four screws.

5. Hang the unit again by the first screw, and then

insert and tighten the remaining four screws.

6. Take waterproofing measures so that water does

not enter the building from screws mounting the

device.

•Make sure the unit is installed securely so that it will

not fall or move due to vibrations or earthquakes.

1. Drill a single screw hole, making sure to hit a stud.

2. Insert and tighten the screw and hang the unit by

the upper wall mounting bracket.

3. Determine the positions for the remaining four screws

(two for the top bracket and two for the bottom), and

remove the unit.

• The weight of the device will be applied to the wall. If the strength of the wall is not suffi-

cient, reinforcement must be done to prevent the transfer of vibration.

•Do not drop or apply unnecessary force to the device when installing. Internal parts may

be damaged and may become highly dangerous.

• Install the unit on a vertical wall and ensure that it is level.

Locating Screw Holes

Mounting

Structure

•When installing with bare hands, take caution to

not inflict injury.

•Be careful not to hit electrical wiring, gas, or water

piping while drilling holes.

Item

CAUTION

Be sure to do

Mounting Bracket

(upper)

Tapping Screw

Location of Screw Hole

Locating Screw Holes

HIGH ELEVATION

DISCONNECT

•If this water heater is being installed at an elevation of

2,000 ft. or higher, disconnect the connector labeled

"High Elevation Disconnect" as illustrated on the right.

This connector is located inside the unit.

•Disconnect power to the water heater before discon-

necting this connector. Failure to perform this step will

result in a "73" code displayed on the remote controller

and a cease in operation. If this occurs, disconnect,

then reconnect power to the water heater to reset the

system.

Installations at Elevations

Above 2,000 ft.

Filling the neutralizer unit with water

The neutralizer unit can be filled before connecting the vent pipe.

Filling the neutralizer unit before vent pipe installation.

DANGER

Prior to initial start up, make sure that you fill the neutralizer unit with water.

This is to prevent dangerous exhaust gases from entering the building.

Failure to fill the neutralizer unit could result in severe personal injury or death.

Please follow one of the procedures described below to ensure that the neutralizer unit is filled with water.

1) Fill the neutralizer unit by pouring approx. 17 oz.(500ml) of water into the exhaust accessory on the top of

the appliance as illustrated below.

Or, if the vent pipe has already been installed:

2) After installing the drain pipe, make sure that the area around the appliance is well ventilated; open a

window or a door if necessary.

Then, operate the unit and verify that condensate is coming out of the drain pipe.

(During normal use of the water heater, condensate will begin to discharge from the drain pipe within 15 minutes

of use. However, depending on the season and/or installation site conditions, it may take longer.)

17 oz.

500ml

Intake

Exhaust

8. Vent Pipe Installation (Indoor Installation Only)

WARNING

Be sure to do

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, in the U.S. to the National Fuel Gas Code ANSI

Z233.1/NFPA 54 – latest edition, and in Canada, in accordance with NSCNGPI.

Pipe diameter 4"

No. of Elbows Max. Straight Vent Length

439'

345'

251'

157'

•This appliance may be vented with either PVC

or CPVC schedule 40 pipe.

Refer to page 12 for additional requirements.

•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.

•Do not common vent or connect more than

one appliance to this venting system.

•The total vent length including horizontal &

vertical vent runs should be no less than 3'.

•Do not store hazardous or flammable sub-

stances 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 so as to prevent injury or

property damage.

•If snow is expected to accumulate, take care

the end of the pipe is not covered with snow or

hit by falling lumps of snow.

Maximum Vent Lengths

•This appliance has been designed to be vented

with 4" PVC or CPVC pipe. Do not exceed the

following maximum vent lengths:

•Maintain the same vent pipe diameter from the

heater flue to the vent termination.

•If 3" PVC or CPVC vent pipe is required, refer to

pages 12 - 14 for instructions.

General Requirements

Clearances

PVC or CPVC has been approved for use on this

appliance with zero clearance to combustibles.

WARNING

CARBON MONOXIDE POISONING

Failure to properly seal the vent system could

cause flue products to enter the living space.

Item Material United States Canada

Exhaust Vent/Air Intake

Schedule 40 PVC ANSI/ASTM D1785

ULC S636 Certified

Materials Only

PVC-DWV ANSI/ASTM D2665

Schedule 40 CPVC ANSI/ASTM F441

Pipe Cement/Primer PVC ANSI/ASTM D2564

CPVC ANSI/ASTM F493

Note: Do Not Use Cellular Foam Core Pipe

PVC/CPVC Installation Instructions

• Use only solid PVC or CPVC schedule 40 pipe. Cellular foam core piping is not allowed.

•

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.

• Follow all general venting guidelines as outlined on this page.

• The pipe shall be installed so that the first 3’ of pipe from the appliance flue outlet is readily

accessible for visual inspection.

• When preparing and assembling the pipe, follow instructions as provided by the pipe

manufacturer. In general, the following practices must be observed:

o Squarely cut all pieces of pipe.

o Remove all burs and debris from joints and fittings.

o All joints must be properly cleaned, primed, and cemented. Use only cement and primer

approved for use with the pipe material as outlined in the above table.

•

• PVC or CPVC pipe has been approved for use on this appliance with zero clearance to combustibles.

All piping must be fully supported. Use pipe hangers at a minimum of 3 foot intervals. Do not use

the water heater to support the vent piping.

3" PVC or CPVC schedule 40 pipe may also be used on this appliance, however the BTUH input of

the appliance will be reduced by up to 10%. Refer to page 13 - 14 for additional instructions.

3 45' 10'

No. of Elbows 4" Pipe 3" Pipe

2 51' 13'

1 57' 16'

• Do not exceed the following maximum vent lengths:

Venting With PVC or CPVC

This appliance can be vented with non cellular core plastic pipe materials as specified in the below table.

Vent installations in Canada which utilize plastic vent systems must comply with ULC S636.

•

•Abird 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

(part #VT4-PVCS, use part #VT3-PVCS when using 3" PVC or CPVC).

When attaching the piping to the water heater, a 4" PVC or CPVC coupling or elbow must be used to

start the vent run. When venting with 3" PVC or CPVC, a 4" x 3" coupling must be used to start the

vent run. It is not necessary to use cement or silicone when attaching the coupling or elbow to the

water heater.

Vertical Vent Termination- PVC/CPVC Materials Only

•

Horizontal Vent Termination- PVC/CPVC Materials Only

•

Insert Bird

Screen* in

End of Each

90 Elbow

Hanger

Straps

**1' mini

* Not supplied with water heater,

order separately.

mum recommended,

but not required.

PVC/CPVC

Coupling

3 ft. Min.

FirestopFirestop

Firestop/Support

Roof

Flashing

Roof

Flashing

Hanger

Strap

**1'

Minimum

**1'

Minimum

Support

PVC/CPVC

Coupling

Slope

Slope vent

Upwards

Intake

Exhaust

vent

Upwards

Intake Exhaust

Insert Bird Screen

in End of 45 Elbow

12" over maximum

snow level

or 24", whichever

is greater.

12" over maximum

snow level

or 24", whichever

is greater.

Insert Bird

Screen* in

End of

90 Elbow

Storm

Collar

Storm

Collar

As illustrated on the left, make sure to keep

a distance of 3' or wider between the intake

and exhaust when installing the vent piping.

Te r minate at least 12" above grade or

above snow line.

Te r minate at least 7' above a public walk-way,

6' from the combustion air intake of

any appliance, and 3' from any other

building opening, gas utility meter, ser-vice

regulator etc.

Te r minate at least 3' above any forced air

inlet within 10', 1' below, 1' horizontally

from or 1' above any door, window, or

gravity air inlet into any building per National

Fuel Gas Code ANSI Z223.1/NFPA 54.

Slope the horizontal vent 1/4" upwards

for every 12" toward 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. Please refer to Technical

Bulletin TB 010606 for full installation in

structions.

As illustrated on the left, make sure to keep a

distance of 3' or wider between the intake and

exhaust when installing the vent piping.

Te r minate at least 6' from the combustion air

intake of any appliance, and 3' from any

other building opening, gas utility meter, service

regulator etc.

Enclose exterior vent systems below the roof

line to limit condensation and protect against

mechanical failure.

When the vent penetrates a floor or ceiling and

is not running in a fire rated shaft, a firestop and

support is required.

Te r minate the vent system at least 2' above, but

not more than 6' above the roof line, or accord-ing

to the vent pipe manufacturer's instructions.

Te r minate the vent system at least 2' above any

portion of a building located within 10' horizon-tally.

Provide vertical support every 3' or as required

by the vent pipe manufacturer's instructions.

A short horizontal section is recommended to

prevent debris from falling into the water heater.

When using a horizontal section, slope the

horizontal vent 1/4” upwards for every 12”

toward the termination to drain condensate.

**1' minimum recommended,

but not required.

Not supplied with water heater,

order separately.

•

Hanger

Straps

The concentric termination may be shortened,

but not lengthened from its original factory

supplied length.

Te r minate at least 12" above grade or

above snow line.

Te r minate at least 7' above a public walkway,

6' from the combustion air intake of

any appliance, and 3' from any other

building opening, gas utility meter, service

regulator etc.

Teminate at least 3' above any forced air

inlet within 10', 1' below, 1' horizontally

from or 1' above any door, window, or

gravity air inlet into any building per National

Fuel Gas Code ANSI Z223.1/NFPA 54.

Slope the horizontal vent 1/4" upwards

for every 12".

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. Please refer to Technical

Bulletin TB 010606 for full installation in

structions.

PVC/CPVC

Coupling

Slope vent

Upwards

Minimum

Pipe diameter

No. of Elbows

310'

213'

116'

Insert Bird Screen

in End of Termination

**Not including the concentric termination

•

There must be a minimum of 1" clearance between

the outside wall and the air intake section of the

termination as illustrated on the left.

•

Install a securing strap to prevent movement of

the termination.

Strap

Max. Straight Vent Length**

3" PVC or CPVC

Gas Meter

Select a gas meter capable of supplying the entire

btuh demand of all gas appliances in the building.

Gas Connection

•Do not use piping with a diameter smaller than

the inlet diameter of the water heater.

•Gas flex lines are not recommended unless they

are rated for 199,900 btuh.

•Install a gas shutoff valve on the supply line.

•Use only approved gas piping materials.

Follow the instructions from the gas supplier.

Gas Pressure

Size the gas line according to total btuh demand

of the building and length from the meter or

regulator so that the following supply pressures

are available even at maximum demand:

Natural Gas Supply Pressure

Min. 4" WC

Max. 10.5" WC

LP Gas Supply Pressure

Min. 8" WC

Max. 14" WC

9. Gas Piping

The appliance and its individual shutoff valve must be disconnected from the gas supply piping system

during any pressure testing of that system at test pressures in excess of 1⁄2psig (3.5 kPa).

The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff

valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1⁄2

psig (3.5 kPa).

The appliance and its gas connections must be leak tested before placing the appliance in operation.

The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.

In order to choose the proper size for the gas line, consult local codes or the National Fuel Gas Code ANSI

Z223.1.

Natural Gas

Meter **See next page for the pipe capacity charts.

Noritz Condensing Tankless Gas Water Heater

(199,900 Btuh)

Clothes Dryer

(35,000 Btuh)

Barbecue

(50,000 Btuh)

Gas Range Stove

(65,000 Btuh)

10'

Gas Fireplace

(25,000 Btuh)

Instructions

1. Size each outlet branch starting from the furthest

using the Btuh required and the length from the

meter.

2. Size each section of the main line using the

length to the furthest outlet and the Btuh

required by everything after that section.

Sample Gas Line

Sample Calculation

Outlet A: 45' (Use 50'), 50,000 Btuh requires 1/2"

Outlet B: 40', 65,000 Btuh requires 1/2"

Section 1: 45' (Use 50'), 115,000 Btuh requires 3/4"

Outlet C: 30', 35,000 Btuh requires 1/2"

Section 2: 45' (Use 50'), 150,000 Btuh requires 3/4"

Outlet D: 25' (Use 30'), 25,000 Btuh requires 1/2"

Section 3: 45' (Use 50'), 175,000 Btuh requires 1"

Outlet E: 25' (Use 30'), 199,900 Btuh requires 3/4"

Section 4: 45' (Use 50'), 374,900 Btuh requires 1-1/4"

Section 3 Section 2 Section 1

Outlet A

Outlet B

Outlet C

Outlet D

Outlet E

5' 5'

Section 4

Measuring Gas Pressure

In order to check the gas supply pressure to the unit, a

tap is provided on the gas inlet. Remove the hex head

philips screw from the tap, and connect a manometer

using a silicon tube.

In order to check the gas manifold pressure, a pair of

taps are provided on the gas valve inside the unit.

The pressure can be checked either by removing the hex

head philips screw and connecting a manometer with a

silicon tube, or by removing the 1/8" NPT screw with an

allen wrench and connecting the appropriate pressure

gauge.

Maximum Natur

Natur

al Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)

Contact the Gas Supplier for Btu/Cubic Ft. of the Supplied Gas. 1000 BTU/Cubic Ft. is a Typical Value

Maximum Liquified P

Liquified P

etroleum (Undiluted) Delivery Capacity in Thousands of Btuh (0.5" WC Pressure Drop)

Length in Feet

Pipe

Size

Pipe

Size

1/2"

3/4"

1 1/4"

1 1/2"

2 1/2"

3 1/2"

10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'

10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'

174

363

684

1404

2103

4050

6455

11,412

16,709

23,277

119

249

470

965

1445

2784

4437

7843

11,484

15,998

200

377

775

1161

2235

3563

6299

9222

12,847

Adapted from UPC 1997

171

323

663

993

1913

3049

5391

7893

10,995

152

286

588

880

1696

2703

4778

6995

9745

138

259

532

798

1536

2449

4329

6338

8830

127

239

490

734

1413

2253

3983

5831

8123

56 53 50 44

118 111 104 93

222 208 197 174

456

683

1315

2096

3705

5425

7557

428

641

1234

1966

3476

5090

7091

404

605

1165

1857

3284

4808

6698

358

536

1033

1646

2910

4261

5936

275

567

1071

2205

3307

6221

189

393

732

1496

2299

4331

152

315

590

1212

1858

3465

129

267

504

1039

1559

2992

114

237

448

913

1417

2646

103

217

409

834

1275

2394

196

378

771

1181

2205

185

346

724

1086

2047

173

322

677

1023

1921

162

307

630

976

1811

146

275

567

866

1606

132

252

511

787

1496

112

213

440

675

1260

Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas (0.60 Specific Gravity, 0.5" WC Pressure Drop)

Length in Feet

Pipe

Size

3/4"

1 1/4"

1 1/2"

10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 150' 200'

206

383

614

1261

2934

147

269

418

888

2078

121

218

334

723

1698

105

188

284

625

1472

168

251

559

1317

153

227

509

1203

141

209

471

1114

132

194

440

1042

125

181

415

983

118

171

393

933

137

320

762

116

277

661

Maximum Capacity of Flex TracPipe in Thousands of Btuh Liquified Petroleum

( 0.5" WC Pressure Drop)

Length in Feet

Pipe

Size

3/4"

1 1/4"

1 1/2"

10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 150' 200'

325

605

971

1993

4638

232

425

661

1404

3285

191

344

528

1143

2684

166

297

449

988

2327

149

265

397

884

2082

136

241

359

805

1902

126

222

330

745

1761

118

208

307

696

1647

112

197

286

656

1554

106

186

270

621

1475

143

217

506

1205

129

183

438

1045

** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.

Maximum Capacity for Gas Flex Connectors in Cubic Feet per Hour of Natural Gas (0.60 Specific Gravity, 0.5" WC Pressure Drop)

Length in Inches

Pipe

Size

1/2"

3/4"

1 1/4"

12" 24" 36" 48" 60" 72"

180 150

290

581

1470

125

255

512

1200

106

215

442

1130

197

397

960

173

347

930

Length in Inches

Pipe

Size

1/2"

3/4"

1 1/4"

12" 24" 36" 48" 60" 72"

288 240

465

930

2352

200

409

825

1920

169

344

708

1808

149

315

638

1536

137

278

556

1488

Maximum Capacity for Gas Flex Connectors in Thousands of Btuh Liquified Petroleum ( 0.5" WC Pressure Drop)

** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.

TracPipe® is a registered trademark of Omega Flex.

Gas Line Sizing for a Noritz Condensing Tankless Gas Water Heater

10.

Water Piping

This appliance suitable for potable water and space heating applications. 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.

If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold

water supply line, means shall be provided to control thermal expansion. Contact the water supplier or a local plumb-

ing inspector on how to control this situation.

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 ). This pressure relief valve must

be capable of an hourly Btu rated temperature steam discharge of 199,900 Btuh. Multiple valves may be used. The

pressure relief capacity must not exceed 150 psig. No valve shall be placed between the 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 unit is installed with a separate

storage vessel, the separate vessel must have its own temperature and pressure relief valve. This 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.

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.

When water is required in one part of the system at a higher temperature than in the rest of the system, means such

as a mixing valve shall be installed to temper the water to reduce the scald hazard.

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.

• Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.

• Perform the following insulation measures for prevention of freezing.

•Take appropriate heat insulation measures (e.g., wrapping with heat

insulation materials, using electric heaters) according to the climate of

the region to prevent the pipe from freezing.

•Make sure that there are no water leaks from the cold and hot water

supply pipes, then insulate the pipes completely.

•Be sure to also completely insulate the water supply valve and the

cold and hot water connections on the water heater (refer to the figure

on the right).

•Do not cover the water drain plug with insulation so that water in the

pipe can be drained. (Refer to the figure in the right.)

•

Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping.

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

• When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measure.

• Avoid using joints as much as possible to keep the piping simple.

• Avoid piping in which an air holdup can occur.

•If installing the unit on a roof:

•About lower-level hot water supply

If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to

the unit 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.

Check the pressure before putting the unit into operation.

Failure to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and may

cause the unit to shut down frequently.

Completelyinsulate

thewaterinletand

outletfittings.

Insulatethewater

supplyvalvecompletely.

Donotcoverthewater

drainplugwithinsulation

sothatwaterinthepipe

canbedrained.

Supply water piping

•

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

treated with chromates, boiler seal or other chemicals.

•

Mount a check valve and a shut off valve (near the inlet).

•In order for the client to use the water heater

comfortably, 98.1 to 491 kPa (14 to 70 PSI) of

pressure is needed from the water supply.

Be sure to check the water pressure. 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.

Drain piping

•Expansion water may drop from the pressure

prevention device and wet the floor. If neces-

sary, provide drain piping or use a drain hose to

remove the water.

Hot water piping

•Do not use lead, PVC, iron or any piping which

has been treated with chromates, boiler seal or

other chemicals.

•The longer the piping, the greater the heat loss.

Try to make the piping as short as possible.

•Use mixing valves with low water resistance. Use

shower heads with low pressure loss.

•If necessary, use a pump or other means to en-

sure that the supply water pressure to the inlet of

the heater does not fall below 29 PSI when the

maximum amount of water is being demanded.

Also install a pressure meter on the inlet. If this is

not done, local boiling will occur inside the water

heater causing abnormal sounds and decreasing

the durability of the heat exchanger.

If this water heater will be installed in an application where the supply water is hard, the water must be

treated with either a water softener, which removes the hardness, or by using sequestering agents, such

as the Noritz Scale Shield, that reduce the amount of scale deposits. Refer to the below tables for sug-

gested treatment and maintenance measures to be taken based on the water hardness level. Damage to

the water heater as a result of water in excess of 12 gpg (200 mg/L) of hardness is not covered by the

Noritz America Limited Warranty.

Note: When installing a water softener, consult with the manufacturer for proper sizing and installation

guidelines; the below diagram is for reference only. For more information about Scale Shield, contact

Noritz America at 866-766-7489.

Water Treatment

Water Treatment System

City Water Supply

Pressure

Relief

Valve

Hot Water to Fixtures

Shutoff Valve

Drain

Cold to Water

Heater

Optional Sediment

Filter

Water Treatment Device

Shutoff Valve

Type of Water

Hardness

Level

Treatment

Device

Flush

Frequency*

Type of Water

Hardness

Level

Treatment

Device

Flush

Frequency*

Soft

0-1 gpg

1-3 gpg

(0-17 mg/L)

None None None

None

Slightly Hard

(17-51 mg/L)

None None

Moderately

Hard

3-7 gpg

(51-120 mg/L)

ScaleShield Once a Year Once a Year

Twice a

Year

Once a Year

7-10 gpg

(120-171 mg/L)

ScaleShield

Very Hard

10-14 gpg

(171-239 mg/L)

Water

Softener

Required

Extremely

Hard

Soft

Slightly Hard

Moderately

Hard

Very Hard

Extremely

Hard

> 14 gpg

(> 239 mg/L)

0-1 gpg

1-3 gpg

(0-17 mg/L)

(17-51 mg/L)

3-7 gpg

(51-120 mg/L)

7-10 gpg

(120-171 mg/L)

10-14 gpg

(171-239 mg/L)

> 14 gpg

(> 239 mg/L)

Water

Softener

Required

Water

Softener

Required

Water

Softener

Required

* Install Noritz Isolation Valves to allow for flushing.

Water

Softener

Suggested

Water

Softener

Suggested

*Install Noritz Isolation Valves to allow for flushing.

**Flushing is required if a water softener is not installed.

Residential Use Treatment Guidelines Commercial Use Treatment Guidelines

NORITZ

Condensing

Tankless Gas

Water Heater

•This water heater is a high efficiency, fully condensing appliance which produces condensate during

operation. The water heater heater incorporates a collection, neutralization, and removal system which

must be properly drained in order to ensure proper operation of this appliance.

•The water heater is supplied with a pre-installed condensate neutralization system. No additional neu-

tralizer is required unless local code dictates otherwise.

•In order to drain the condensate, a 1/2" threaded fitting is provided at the base of the water heater. Do

not reduce the size of this fitting or the drain piping to less than 1/2".

•Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material which

can corrode when placed into contact with water.

•Keep the length of the drain pipe as short as possible. Long runs or applications where the nearest drain

is above the water heater will require the use of a condensate pump. Size the pump to allow for a

maximum condensate discharge of 2 GPH from the water heater.

• Horizontal runs must be sloped 1/4" per foot towards the drain or condensate pump.

•The end of the drain pipe must not be submerged in water or blocked in any way.

•Be sure to check that condensate is freely flowing from the drain piping after the system has been

installed. Condensate will begin flowing out of the water heater within 15 minutes after operation has

started.

•Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heat-

ers, etc.).

11. Condensate Piping



  

  

  

     

    

     

    

Condensate piping to floor drain



  

  

  

   ! "# $

$ "  %%  

%& %

Condensate piping with pump

 

' 

MAINTAIN CLEARANCE

DO NOT ADD

ANY VALVES

DO NOT ADD

ANY VALVES

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