Noritz NCC300DV 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 re or explosion may result

causing property damage, personal injury or death.

NORITZ AMERICA

CORPORATION

Installation Manual

CONDENSING TANKLESS GAS WATER HEATER

NCC300DV (GQ-C5032WZ-FF US) (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

SBB80Z0-2

Rev. 11/20

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, 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.

CAUTION

*SBB80Z0*

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 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 specications of its products without notice.

CERTIFIED

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

Anchoring Screw 1

each

Part Shape Q’ty

Remote Controller

(See p. 37)

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))

Quick Connect Cord

(QC-2) 11

each

Isolation Valves*

(includes pressure

relief valve)

Owner's Guide, Warranty,

Installation Manual

(this document)

Bird Screen for

4" (100mm) PVC

VT4-PVCS

Pipe Cover

(PC-7S)

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

4" (100mm)

Horizontal Hood

Termination PVT-HL

Plastic Rain Cap**

PRC-1

each

System Controller Unit

SCU-301-12M

SCU-401-12M

SCU-401-24M

System Controller

(SC-301-6M, SC-401-6M)

SV Conversion Kit

( SV-CK-4)

•90 Elbow

(With Inlet Screen)

•

Installation Manual

(Check List)

Drain hose

(With clamp) 2

Neutralizer

(NT20A)

(For up to 10 water heaters)

4"PVC to 5"

SS Vent Adapter

(PVC4XVP5-ADAPT)

* Isolation valves are necessary for ushing the Heat Exchanger.

They allow for easy ushing of the system.

** Not approved for use in Canada.

Noritz Connect

Wireless Adapter

NWC-ADAPTER

(NAW-1 US)

To drain outletTo drain outlet

To drain outlet

Cold Water

Hot Water

Quick Connect Cord

Union

Gas Valve

Pressure

Relief Valve

Isolation Valve*

* Isolation valves are

necessary for flushing

the Heat Exchanger.

They allow for

easy flushing of

the system.

Make this distance as

short as possible.

The hot water temperatur

will become unstable as

the pipe length increases.

Size the piping to allow for the

maximum flow rates of the units.

The backflow preventer should be placed

upstream of the cold water branch.

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.

Distance on sides

3-17" (75-432mm)

Exhaust

Intake

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.

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.

The Quick Connect Cord is 6 ft.(2m) long. Install the units 3-17" (75 - 432mm) 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 di󰀨erence in pipe length

between the two units).

Note: Connect the remote

controller to only one

of the units.

Units must be same

model in order to

quick connect.

4. Before Installation

Checkup

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

DANGER

Do Not Use Equipment for Purposes Other Than Those Specied

• 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

300,000 Btuh.

Check the Power

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

Using the incorrect voltage may result in re 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 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-4) is prohibited.

Make sure to follow all clearance and venting requirements outlined in this manual.

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 specied 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 res, 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 o󰀨 of roofs.

e.g. NCC300DV(GQ-C5032WZ-FF US)

5. Choosing Installation Site

• 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 res 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 re or cracking.

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

Dust may accumulate and reduce the performance of the unit's fan.

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 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 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 unit 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 unit's fan. This can result in incomplete

combustion.

• Place the unit for easy access for service and maintenance.

• A drain pan, or other means of protection against water damage, is

required to be installed under the water heater in case of leaks.

DANGER

WARNING

Prohibited

* 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 oors 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 ow.

* 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.

• 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 ow will not be

a󰀨ected by fans or range hoods.

• Take care that noise and exhaust gas will not a󰀨ect neighbors.

Avoid installation on common walls as the unit will make some

operational noises while it is running.

• Before installing, make sure that the exhaust ue 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).

• If the unit is installed in a location with very high humidity,

condensate may form inside the unit and/or cause incomplete

combustion, damage to the electrical components, or electric

leakage.

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 listed below:

Noritz N-Vent www.noritz.com

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

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

• Consult with the customer concerning the location of installation.

• Do not install the water heater near staircases or emergency exits.

•

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

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.

•

Do not locate the vent termination directed towards a window or any other

structure which has glass or wired glass facing the termination.

Prohibited

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 the Natural Gas and Propane Installation

Code CSA B149.1 - latest edition for detailed requirements.

WARNING

Item

Distance from combustibles

• Maintain the following clearances

from both combustible and

non-combustible materials.

Check Illustration

In order to facilitate inspection and repair it

is recommended to leave:

• 8" (200mm) or more on either side of the

unit.

• 24" (600mm) or more in front of the unit.

• 3" (75mm) or more above and below the

vent pipe.

Securing of space for

repair/inspection

24" (600mm)

or more

Distance from

the side

12" (300mm)

or more

3" (75mm)

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

non-combustible material of a width

greater than the water heater.

Exhaust hood

Range

Dividing plate Water

heater

Cooking Equipment

DescriptionRef

A= Clearance above grade, veranda, porch,

deck, or balcony

B= Clearance to window or door that may

be opened

C= Clearance to permanently closed window

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

Clearance to nonmechanical air supply

inlet to building or the combustion air inlet

to any other appliance

K= Clearance to a mechanical air supply inlet 6 ft (1.83 m)

L= Clearance above paved sidewalk or paved

driveway located on public property

Clearance under veranda, porch, deck,

or balcony

7 ft (2.13 m)†

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 inches (60 cm).

12 in (30 cm)‡

12 in (30 cm)

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 12 in

(30 cm) for appliances > 10,000

Btuh (3kW) and ≤ 100,000 Btuh

(30 kW), 36 in (91 cm) for

appliances > 100,000 Btuh (30 kW)

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)

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 9 in

(23 cm) for appliances > 10,000

Btuh (3kW) and ≤ 50,000 Btuh

(15 kW), 12 in (30 cm) for

appliances > 50,000 Btuh (15 kW)

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 12 in

(30 cm) for appliances > 10,000

Btuh (3kW) and ≤ 100,000 Btuh

(30 kW), 36 in (91 cm) for

appliances > 100,000 Btuh (30 kW)

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 9 in

(23 cm) for appliances > 10,000

Btuh (3kW) and ≤ 50,000 Btuh

(15 kW), 12 in (30 cm) for

appliances > 50,000 Btuh (15 kW)

3 ft (91 cm) above if within

10 ft (3 m) horizontally

12 in (30 cm)

Vent Terminal

Air Supply Inlet

Area Where Terminal

is Not Permitted

US Direct Vent Installations 2

Canadian Direct Vent Installations 1

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 the Natural Gas and Propane Installation Code

CSA B149.1.

DescriptionRef

Clearance above grade, veranda, porch,

deck, or balcony

Clearance to window or door that may

be opened

Clearance to permanently closed window

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

Clearance to unventilated soffit *

Clearance to outside corner *

Clearance to inside corner *

Clearance to each side of center line

extended above meter/regulator assembly

Clearance to service regulator vent outlet

Clearance to nonmechanical air supply

inlet to building or the combustion air inlet

to any other appliance

Clearance to a mechanical air supply inlet 6 ft (1.83 m)

Clearance above paved sidewalk or paved

driveway located on public property

Clearance under veranda, porch, deck,

or balcony

7 ft (2.13 m)†

In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

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 inches (60 cm).

12 in (30 cm)‡

12 in (30 cm)

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 12 in

(30 cm) for appliances > 10,000

Btuh (3kW) and ≤ 100,000 Btuh

(30 kW), 36 in (91 cm) for

appliances > 100,000 Btuh (30 kW)

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)

4 ft (1.2 m) below or to side

of opening; 1 ft (300 mm)

above opening

6 in (15 cm) for appliances

≤ 10,000 Btuh (3kW), 12 in

(30 cm) for appliances > 10,000

Btuh (3kW) and ≤ 100,000 Btuh

(30 kW), 36 in (91 cm) for

appliances > 100,000 Btuh (30 kW)

4 ft (1.2 m) below or to side

of opening; 1 ft (300 mm)

above opening

3 ft (91 cm) above if within

10 ft (3 m) horizontally

12 in (30 cm)

US Non-Direct Vent Installation

Canadian Non-Direct Vent Installation 1

Vent Terminal

Air Supply Inlet

Area Where Terminal

is Not Permitted

* 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.

Clearance Requirements from Vent Terminations to Building Openings

7. Installation

Securing to the wall

IllustrationCheck

4. Drill holes for the remaining four screws.

5. Hang the unit again by the rst screw, and then

insert and tighten the remaining four screws.

6. Take waterproong 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

su󰀩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 inict 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 11 for the location of the

dip switch bank.

Anchoring Screw

* Do not change any other dipswitches.

* High elevation adjustment.

2,001 - 4,500 ft (611 - 1,350m)

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

ON=OFF=

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