Noritz NCC1991-DV Manuel utilisateur

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

NCC1991-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

SBA8747

Rev. 11/11

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

FOR USE IN COMMERCIAL, 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

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

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.

*ENERGY STAR®applies when used in a combination potable

water heating and space heating system.

CERTIFIED

*SBA8747*

Low NOx

Approved by

SCAQMD

14 ng/J or 20 ppm

(Natural Gas Only)

Included Accessories

The following accessories are included with the unit.

Check for any missing items before starting installation.

Q’ty

ShapePart

Tapping Screw 1

each

Part Shape Q’ty

Remote Controller

(See p. 28) Remote Controller

Cord (6ft (2m))

Optional Accessories

The accessories listed below are not

included with the units, but may be necessary

for installation.

Q’ty

ShapePartPart Shape Q’ty

Remote Controller

Cord (26ft (8m))

QuickConnect Cord

(QC-2) 11

each

IsolationValves

(includespressure

reliefvalve)

Owner's Guide, Warranty,

Installation Manual

(this document)

Bird Screen for

4" (100mm) PVC

VT4-PVCS

Bird Screen for

3" (75mm) PVC

VT3-PVCS 2

3" (75mm)

PVC Terminal

VK3-H-PVC 1

PipeCover

(PC-3S-SUS)

Note: Additional vent pieces are available; consult the latest product catalogue for details.

3" (75mm) / 4" (100mm)

Horizontal Hood

Termination PVT-HL 2

each 1

System Controller Unit

(SCU-301-12M)

System Controller

(SC-301-6M)

SVConversion Kit

(#SV-CK-3)

•90 Elbow

(WithInlet Screen)

•

InstallationManual

(CheckList)

Drain hose

(With clamp) 1

Neutralizer

(NT20A)

(For up to 16 water heaters)

Neutralizer

(NC-1)

(For 1 water heater)

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

* 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. (515 - 922mm)

Quick Connect Cord

Union

Gas Valve

Union

Shutoff Valve

Hot Water

Shutoff Valve

Cold Water

Distance on sides

2 - 18 in. (50 - 457mm)

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.

The backflow preventer is

put up before it diverges.

Pressure

Relief Valve

The Quick Connect Cord is 6 ft.(2m) long. Install the units 2-18" (50 - 457mm) 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).

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

• Donot use for otherthanincreasing the temperature ofthewater supply, as unexpectedaccidents

mayoccur as a result.

Check Water Supply Quality

• Ifthe water supply isinexcess of 12 grainspergallon (200 mg/L) ofhardness,acidic or otherwise

impure,treat the water withapprovedmethods in order toensurefull warranty coverage.

WARNING

CAUTION

Check the Gas

• Checkthat the rating plateindicatesthe

correcttype of gas.

• Checkthat the gas supplylineis sized for

199,900Btuh.

Check the Power

• Thepower supply required is120VAC,at 60Hz.

Using the incorrect voltage mayresult in ﬁreorelectricshock.

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

• Thevent system will almostcertainlyneed to be replacedwhenthis appliance is beinginstalled.

Onlyuse vent materials thatarespeciﬁed in thisInstallationManualfor use onthisappliance. Refer

tothe "VentPipeInstallation" section fordetails. IfPVC,CPVC, or CategoryIVlistedpipe is already

installed,check for punctures, cracks,orblockages and consult withthevent pipe manufacturer

beforereusing.

Improper venting may result in ﬁres,propertydamageor exposure to CarbonMonoxide.

Snow Precaution

• Ifthis product will beinstalledin an area wheresnowis known to accumulate,protectthe vent

terminationfrom blockage by snowdriftsor damage from snowfallingoffofroofs.

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 exhaust

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.

Theheat and moisture fromthewater heater may causediscolorationof

wallsand resinous materials, orcorrosionof aluminum materials.

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.

Avoid installation on common walls as the unit will make some

operational noises while it is running.

• Before installing, make sure thatthe exhaust ﬂueterminationwill

havethe proper clearances accordingtothe 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 hot water only and not in a

combination of domestic and space heating.

For Venting Manufacturers Requirements, see websites or phone numbers listed below:

Noritz N-Vent www.noritz.com

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.

Check Illustration

• If possible, leave 8" (200mm) or more on

either side of the unit to facilitate inspection.

• If possible, leave 24" (600mm) or more in

front of the unit to facilitate maintenance

and service if necessary.

• If possible, leave 3" (75mm) or more

above and below the vent pipe to facilitate

inspection and repair if necessary

Securing of space for

repair/inspection

24" (600mm)

or more

Distance from

the side

12" (300mm)

or more

2" (50mm)

or more

4" (100mm)

or more

3" (75mm) or more

8" (200mm)

or more

8" (200mm)

or more

• If the unit 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

unit is not exposed to air containing such

impurities.

* The dividing plate should be of

noncombust-ible material of a width

greater than the water heater.

Exhaust hood

Range

Dividing plate Water

heater

Cooking Equipment

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.

Item

•

There must be a clearance of 24" (600mm)

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" (600mm) or more in

front of the exhaust outlet.

Check Illustration

Outdoor Clearances to Opening

into Any Building

12" (300mm)

or more

12" (300mm)

or more

There must be no

building opening

within this area.

Flue terminal

12" (300mm)

or more

12" (300mm)

or more

Vent Clearances When Heater is In-

stalled Indoors

For installations in the USA,

• 4' below, 4' horizontally from, or 1'above any

door, operable window, or gravity air inlet into

any building.

3' above any forced air inlet within 10'.

For installations in Canada,

• 36" (900mm) below, horizontally from, or

above any door, operable window, or gravity

air inlet into any building.

6' (1.8m) from any forced air inlet.

Maintain the following clearances to any

opening in any building: Illustration

4' *

3' *

1' *

* Clearances for USA only.

Vent Terminal

Clearance

A= Above grade, veranda, porch, deck,

or balcony

B= Window or door that may be opened

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' (0.9m) within a height 15' (4.5m)

above meter/regulator assembly

I= Service regulator vent outlet 3' (0.9m)

J= Nonmechanical air supply inlet or

combustion air inlet to any other

appliance

K= Mechanical air supply inlet 3' above if within

10' [6' (1.8m)]

L= Above paved sidewalk or paved

driveway located on public property

Under veranda, porch, deck, or

balcony

* [7' (2.1m***)]

[ ] = 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" (300mm)****]

12" [12" (300mm)]

4’ (1.2m) below or to the side of

opening, or 1’ (0.3m)above opening

[36" (900mm)]

Air Supply Inlet

Area Where Terminal

is Not Permitted

Indoor Combustion Air

3' (0.9m) within a height 15' (4.5m)

above meter/regulator assembly

3' (0.9m)

3' above if within

10' [6' (1.8m)]

* [7' (2.1m***)]

* [12" (300mm)****]

12" [12" (300mm)]

12" [36" (900mm)]

4’ below or to the side of

opening, or 1’ above opening

[36" (900mm)] 12" [36" (900mm)]

Outdoor Combustion Air

(Direct Vent)

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.

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

sufﬁcient, 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)

Location of Screw Hole

Locating Screw Holes

Installations at Elevations

Above 2,000 ft.

• Adjust the dip switches as illustrated in the table to

the right if this water heater is installed at an altitude

of 2000 ft. (610m) or higher.

• Disconnect power to the water heater before

changing the dip switches. 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.

Note : Please refer to page 28 for the location of the

dip switch bank.

Tapping Screw

* Do not change any other dipswitches.

* High elevation adjustment.

2,001 - 4,000 ft (611 - 1,220m)

0 - 2,000 ft (0 - 610m)

ON= OFF=

4,001 - 6,000 ft (1,221 - 1,830m)

6,001 - 8,000 ft (1,831 - 2,440m)

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