Pentax N-0751M, N-0751M-OD User Manual

0 (0)

Installation Manual

Canada

NORITZ AMERICA CORPORATION

TANKLESS GAS WATER HEATER

N-0751M N-0751M-OD

(Indoor/Outdoor Installation)

(Outdoor Installation)

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.

DANGER

DANGER indicates an imminently hazardous situation which,

 

if not avoided, will result in death or serious injury.

 

 

 

 

WARNING

WARNING indicates a potentially hazardous situation which,

 

if not avoided, could result in death or serious injury.

 

 

 

 

CAUTION

CAUTION indicates a potentially hazardous situation which,

 

if not avoided, may result in minor or moderate injury.

 

 

 

 

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

Prohibited

Disconnect

Ground

Be sure to do

Power

 

 

 

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 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.

CERTIFIED

R

Low NOx

Approved by

SCAQMD

WS-06-9012

Rev. 01/07

Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54latest edition and/or CSA B149.1, Natural Gas and Propane Installation Code (NSCNGPIC).

Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice.

Pentax N-0751M, N-0751M-OD User Manual

1. Included Accessories

The following accessories are included with the unit.

 

Check for any missing items before starting installation.

Part

Shape

Q’ty

Part

Shape

Q’ty

Tapping Screw

 

5

Cross Recessed

 

3

 

Head Screw

 

(N-0751M only)

 

 

 

 

(N-0751M-OD only)

 

 

 

 

 

 

 

Owner's Guide, Warranty,

 

1

Remote Controller

 

 

Installation Manual

 

 

1

 

each

(See p. 21)

 

(this document)

 

 

 

 

 

 

 

 

Remote Controller

 

1

 

 

 

Cord (3m(10'))

 

 

 

 

 

 

 

 

 

The accessories listed below are not

2. Optional Accessories included with the units, but may be necessary for installation.

Part

Shape

Q’ty

Part

Shape

Q’ty

Quick Connect Cord

 

1

Remote Controller

 

1

 

Cord (8m(26'))

 

 

 

 

 

 

Isolator Exp

 

 

Pipe Cover

 

1

(includes pressure

 

1

 

relief valve)

 

 

 

 

[Outdoor installation only]

Remote Controller

1

Outdoor

Junction Box

[ N-0751M only ]

[ N-0751M-OD only ]

Part

Shape

Q’ty

Outdoor Vent Cap

 

1

(VC4(-1))

 

 

 

Part

Shape

Q’ty

Recess Box

 

(RB-4)

1

2

3. Quick Connect Multi System Installation

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

The Quick Connect Cord is 2m (6'). long. Install the units 50 - 450mm (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).

System Diagram

Quick Connect

Cord

Cord

Cord

Connector

Connector

 

Typical Plumbing

 

Union

 

Quick Connect

 

cord

Make this distance as short as possible.

Pressure

Relief

* The hot water temperature will

Valve

become unstable as the pipe

Shutoff

length increases.

Valve

 

*When connecting two units, use only a single remote controller.

Terminal Block

Remote Controller

Note: Connect the remote

 

controller to only one

 

of the units.

Remote Controller Cord

Gas Supply Piping

 

G

Cold Water Supply

 

Hot Water

Distance at center 400 - 800mm (16-32")

Distance on sides 50 - 450mm (2-18")

Union

 

Union

 

Gas Valve

Shutoff

Shutoff Valve

Valve

 

 

Hot Water

 

Cold Water

Leave enough clearance around the plumbing to

Size the piping to allow for the maximum

apply insulation. It will be necessary to add

flow rates of the units.

bends to the piping to ensure that this clearance

 

is available.

 

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.

3

4. Before Installation

DANGER

Checkup [For indoor installation only]

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

Check the Gas

WARNING

Check that the rating plate indicates the

 

 

 

 

 

 

 

 

 

N-0751M

 

 

 

 

 

correct type of gas.

 

 

Natural Gaz Naturel

 

 

 

 

 

 

 

12,000 BTU

 

 

 

 

 

 

 

 

 

199,900 BTU

 

 

 

 

Check that the gas supply line is sized for

 

 

202

765

 

 

 

 

0.65

2.55"

 

 

 

 

 

 

 

4.0

10.5"

 

 

 

199,900 Btuh for this unit.

 

 

 

 

 

 

 

 

 

 

0 - 2,000 Ft. (0 - 610 m) 2,000 - 4,500 Ft.* (610 - 1,370 m*)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the Power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The power supply required is 120V AC, 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.

CAUTION

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 hard, acidic or otherwise impure, treat the water with approved methods in order to ensure full warranty coverage.

4

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.

DANGER

[For indoor installation only]

Install the exhaust vent 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.

[For outdoor installation only]

• Do not enclose the termination with corrugated metal or other materials.

This will cause carbon monoxide

Indoor

poisoning and a potential fire hazard.

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.

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 mobile home, recreation vehicle or on a boat.

Prohibited

[Indoor installation]

Prohibited

[Outdoor installation]

5

CAUTION

Consult with the customer concerning the location of installation.

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.

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 vent termination (or the vent

cap in an outdoor installation) will have the proper clearances

Prohibited

according to the National Fuel Gas Code (ANSI Z223.1).

 

[For outdoor installation only]

Install the water heater in a location where it is free from obstacles and stagnant air.

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

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

other structure which has glass or wired glass facing the termination.

• Avoid installation where the unit will be exposed to excessive winds.

[For indoor installation only]

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.

[For N-0751M only]

Make sure that the location allows installation of the exhaust vent as specified.

For outdoor installation, use the outdoor vent cap.

If it is necessary to vent above the roof line in an outdoor installation, also use the base of the vent cap for rain protection.

Prohibited

Be sure to do

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: 1-800-456-9805 and request instructions.

6

6. 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, to the National Fuel Gas Code ANSI Z223.1/NFPA 54 – latest edition. In Canada, see NSCNGPIC for detailed requirements.

[ For N-0751M ]

Item

From Heater

Required Clearances

Cooking Equipment

ofSecuring forspacerepair/inspection

Check

Maintain the following clearance from both combustible and non-combustible materials.

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 noncombustible material of a width greater than the water heater.

If possible, leave 200mm (8") or more on either side of the unit to facilitate inspection.

If possible, leave 600mm (24") or more in front of the unit to facilitate maintenance and service if necessary.

Illustration

300mm (12") Indoor

900mm (36") Outdoor

600mm (24") Outdoor

100mm (4") Indoor

50mm (2") Indoor

600mm (24") Outdoor

Exhaust hood

Dividing plate

Water

 

heater

Range

 

Min: 75mm (3")

200mm

(8") or Min: 75mm (3") more

200mm (8") or

600mm more (24") or more

7

[ For N-0751M -OD]

Item

Check

 

• Maintain the following clearance from both combustible

 

and non-combustible materials.

Heater

* ( ) indicates the distance when installing a heat insulat-

ing board (incombustible material other than metal, with

 

From

thickness of 2.5mm (0.1") or more) or "section of build-

ing effectively finished with incombustible material."

Note, however, that combustion failure may occur to the

ClearancesRequired

unit as exhaust gas reflects from the wall. Provide clear-

 

 

ance of 600mm (24") or more in the front of the unit to

 

facilitate inspection and repair.

installation

When installing the unit in a common side corridor, provide

 

(84") from the corridor floor.

 

 

a clearance of 1175mm (47") or more in front of the unit.

 

• Set the bottom edge of the exhaust port about 2100mm

ofarea

• When installing the unit on a balcony, etc., secure an

the

 

evacuation route of 600mm (24") or more in width.

Surrounding

 

• Provide clearance of 600mm (24") or more in front of the

 

 

 

unit to facilitate inspection and repair. Do install the unit

 

 

such as the wall of the second floor where the unit is out

 

 

of reach.

 

 

600mm (24")

 

combustible

 

(300mm (12"))

combustible

 

or more

 

 

 

 

10mm (0.4")

 

 

or more

 

 

combustible

 

combustible

 

900mm

 

 

combustible

 

 

(36") or more

 

 

150mm

 

 

 

(6") or more

 

150mm

 

 

(6") or more

 

 

 

1175mm (47")

 

 

 

or more

 

 

 

about

 

 

Handrail

2100mm (84")

 

 

common side

 

 

 

 

 

 

corridor

 

600mm (24")

or more

Handrail

balcony, etc.

8

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

 

Area Where Terminal

 

 

 

 

 

 

 

Air Supply Inlet

is Not Permitted

 

 

 

 

 

 

 

 

 

 

Clearance

Indoor Installation

Outdoor Installation

 

 

(See p.10)

 

(See p.10, 11)

 

 

 

 

 

A=

Above grade, veranda, porch, deck,

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

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

 

or balcony

 

 

 

 

 

 

 

B=

Window or door that may be opened

1.2m (4') below or to the side of

300mm (12") [900mm (36")]

 

opening, or 0.3m (1') above

 

 

 

opening [900mm (36")]

 

 

 

 

C=

Permanently closed window

*

 

 

*

 

 

Vertical clearance to ventilated soffit

 

 

 

 

 

D=

located above the terminal within a

*

 

 

*

 

horizontal distance of 0.6m (2') from

 

 

 

 

 

 

 

 

 

 

the center of the terminal

 

 

 

 

 

 

 

 

 

 

 

 

E=

Unventilated soffit

*

 

 

*

 

F=

Outside corner

*

 

 

*

 

G=

Inside corner

*

 

 

*

 

H=

Each side of center line extended

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

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

 

above meter/regulator assembly

above meter/regulator assembly

above meter/regulator assembly

 

 

 

I=

Service regulator vent outlet

0.9m (3')

 

 

0.9m (3')

 

 

Nonmechanical air supply inlet or

1.2m (4') below or to the side of

300mm (12") [900mm (36")]

 

J=

combustion air inlet to any other

opening, or 0.3m (1') above

 

 

appliance

opening [900mm (36")]

 

 

 

 

K=

Mechanical air supply inlet

0.9m (3') above if within

0.9m (3') above if within

 

 

3m (10') [1.8m (6')]

3m (10') [1.8m (6')]

 

 

 

 

L=

Above paved sidewalk or paved

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

 

 

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

 

driveway located on public property

 

 

 

 

 

 

 

 

 

M=

Under veranda, porch, deck, or

*[300mm (12") - Canada Only****]

*[300mm (12") - Canada Only****]

 

balcony

 

 

 

 

 

 

 

[ ]= 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.

9

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.

[ For N-0751M]

Maintain the following clearances to any opening in any building:

In-

 

• 1.2m (4') below, 1.2m (4') horizontally from,

 

or 0.3m (1') above any door, operable win-

is

 

dow, or gravity air inlet into any building.

HeaterWhen

Indoors

0.9m (3') above any forced air inlet within

 

 

 

 

3m (10').

Clearances

stalled

 

Vent

 

 

-

 

• 0.3m (1') below, 0.3m (1') horizontally from,

isIn

Cap

or 0.3m (1') above any door, operable

Heater

Venta

window, or gravity air inlet into any building.

 

 

 

 

0.9m (3') above any forced air inlet within

VentClearancesWhen

stalledOutdoorsWith

3m (10').

(Noritz vent cap)

 

 

Illustration

1.2m (4')

1.2m (4')

0.3m (1')

0.9m (3')

0.3m (1') 0.3m (1')

0.3m (1')

0.9m (3')

*For Installations in Canada, clearances are as follows: To windows, doors, & gravity air inlets: 900mm (36"). To forced air inlets: 1.8m (6'). These clearance requirements hold true for all of the above situations: Indoor, Outdoor w/vent cap.

10

[ For N-0751M- OD]

Maintain the following clearances to any opening in any building:

 

 

• 0.3m (1') below, 0.3m (1') horizontally from,

ClearancesOpeningOutdoorto

 

or 0.3m (1') above any door, operable

 

window, or gravity air inlet into any building.

BuildingAnyinto

0.9m (3') above any forced air inlet within

3m (10').

 

 

 

 

• 0.3m (1') below, 0.3m (1') horizontally from,

is

 

or 0.3m (1') above any door, operable

 

window, or gravity air inlet into any building.

HeaterWhen

BoxRecess

0.9m (3') above any forced air inlet within

 

 

 

 

3m (10').

VentClearances

Installedina

 

(recess box installation with cover removed)

Illustration

0.3m (1')

0.3m (1')

0.3m (1')

0.9m (3')

0.3m

0.3m (1')

(1')

 

0.3m

 

(1')

0.9m (3')

 

*For Installations in Canada, clearances are as follows: To windows, doors, & gravity air inlets: 900mm (36"). To forced air inlets: 1.8m (6').

11

7. Installation

Securing to the wall

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 sure to do

be damaged and may become highly dangerous.

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

 

 

Item

Locating Screw Holes

Mounting

Structure

Elevations

(2,000').

Installationsat

Above610m

Check

CAUTION

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.

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.

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.

If this water heater is being installed at an elevation of 610m (2,000') 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 disconnecting 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.

Illustration

Location of Screw Hole

Mounting Bracket (upper)

Locating Screw Holes

Tapping Screw

ELEVATION

DISCONNECT

HIGH

12

Part No.
FSAA4
9401RYPK
2SVWA04
SRASPSA4

8. Vent Pipe Installation (Indoor Installation Only)

[ For N-0751M]

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

Be sure to do

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

 

Vent Piping

Use only UL listed category III vent materials.

Follow the vent pipe manufacturer's installation instructions.

Pipe diameter

100mm (4")

No. of Elbows

Max. Straight Vent Length

3

4.6m (15')

2

8.2m (27')

1

11.7m (39')

Make the vertical section of the exhaust vent as short as possible.

Maintain the same vent pipe diameter from the heater flue to the vent termination.

Clearances

Manufacturer and

Enclosed

Unenclosed

Product

Hor.

Vert.

Hor.

Vert.

Noritz N-Vent

250mm (10") (sides)

100mm

75mm

75mm

150mm (6") (bottom)

(4")

(3")

(3")

 

 

375mm (15") (top)

 

 

 

 

Protech FasNSeal

200mm (8") (sides)

100mm

75mm

75mm

100mm (4") (bottom)

(4")

(3")

(3")

 

 

300mm (12") (top)

 

 

 

 

Protech FasNSeal W2

150mm

100mm

75mm

75mm

 

(6")

(4")

(3")

(3")

 

HeatFab SafTVent

150mm

150mm

50mm

50mm

(6")

(6")

(2")

(2")

 

Z-Flex Z-Vent

200mm

100mm

25mm

25mm

(8")

(4")

(1")

(1")

 

Flex-L-StaR-34

200mm

100mm

25mm

25mm

(8")

(4")

(1")

(1")

 

These clearances are subject to change.

Refer to the UL listing for the proper clearances.

The first vertical run from the top of the heater should be no longer than 0.9m (3').

Make sure vent pipe is gas tight and will not leak. Use silicon sealant wherever necessary.

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 0.9m (3').

Do not place any dangerous objects at the end of the exhaust vent and check that vent pipe is not blocked in any way.

Steam (smoke) or water drops may come out from the end of the exhaust pipe. Select the location for the end of the vent so that steam is not visible, and the vent is not wet with dripping water.

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.

Consult the vent pipe manufacturer's installation instructions for chimney connections.

Appliance Adapters

Use the following adapters to connect the unit to the venting system.

Manufacturer and

Product

Protech FasNSeal

HeatFab SafTVent

Z-Flex Z-Vent

Flex-L Star-34

13

Horizontal Vent Termination

 

 

 

 

Terminate at least 300mm (12") above

 

Hanger

 

grade or above snow line.

Elbow

Straps

Terminate at least 2.1m (7') above a public

 

 

walkway, 1.8m (6') from the combustion air

 

Wall

Termination

intake of any appliance, and 0.9m (3') from

 

any other building opening, gas utility meter,

 

Slope vent Thimble

 

 

Downwards

 

service regulator etc.

 

 

Terminate at least 0.9m (3') above any

 

**0.3m (1') Min. -

 

forced air inlet within 3m (10'), 1.2m (4') be-

Appliance

0.9m (3') Max.

 

low, 1.2m (4') horizontally from or 0.3m (1')

Adapter*

 

 

above any door, window, or gravity air inlet

 

* Adapter not required when

 

into any building per National Fuel Gas Code

 

 

ANSI Z223.1/NFPA 54.

 

using Noritz N-Vent.

 

 

** 0.3m (1') minimum recommended,

• Slope the horizontal vent 1/4" downwards

 

 

 

 

but not required. Avoid installing

 

for every 300m (12").

 

elbow directly on flue.

 

 

 

• Use a condensation drain if necessary.

 

 

• In the Commonwealth of Massachusetts a

 

 

 

carbon monoxide detector is required for all

Vertical Vent Termination

 

side wall horizontally vented gas fuel equip-

 

ment. Please refer to Technical Bulletin TB

 

Rain

 

 

Cap

 

010606 for full installation instructions.

Storm

 

 

Collar

Roof

• Terminate at least 1.8m (6') from the combus-

 

 

Flashing

tion air intake of any appliance, and 0.9m (3')

 

 

Roof

 

from any other building opening, gas utility

Jack

 

meter, service regulator etc.

 

 

Firestop/

Support

 

Hanger

Firestop

Elbow

Strap

 

 

 

 

Condensation

 

 

Drain (Install

 

**0.3m (1') Min. -

According to

 

0.9m (3') Max.

Local Codes)

 

 

Appliance

 

 

Adapter*

 

 

* Adapter not required when

 

using Noritz N-Vent.

 

 

** 0.3m (1') minimum recommended,

 

but not required. Avoid installing

 

elbow directly on flue.

 

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.

Terminate the vent system at least 0.6m (2') above, but not more than 1.8m (6') above the roof line, or according to the vent pipe manufacturer's instructions.

Terminate the vent system at least 0.6m (2') above any portion of a building located within 3m (10') horizontally.

Provide vertical support every 3.6m (12') or as required by the vent pipe manufacturer's instructions.

Slope the horizontal vent 1/4" for every 300m (12") towards the drain tee.

Do not vent straight upwards.

Always have a horizontal section of venting.

Install a condensation drain in the horizontal section of the venting.

14

Combustion Air

Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1 and

in Canada, in accordance with NSCNGPIC.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Provide two permanent openings to allow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circulation of combustion air.

 

 

 

 

 

 

 

 

 

 

 

250mm (10")

 

 

 

 

 

• Make each opening 199 square inches if they

 

 

 

 

 

 

 

 

 

 

provide indoor air, and 100 square inches for

 

 

 

 

 

500mm (20")

outdoor air.

 

 

 

 

 

 

 

• If the unit is installed in a mechanical closet, provide a 600mm (24") clearance in front of the unit to the door.

• If combustion air will be provided through a duct, size the duct to provide 60 cubic feet of fresh air per minute.

500mm (20")

250mm (10")

Openings supplying indoor air

15

9. Gas Piping

Follow the instructions from the gas supplier.

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 12 psi (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 12 psi (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.

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

Measuring Gas Pressure

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.

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.

Sample Gas Line

Noritz Gas Water Heater

(199,900 Btuh) Barbecue

(50,000 Btuh)

 

Outlet E

 

 

 

 

 

 

 

 

 

 

Outlet A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clothes Dryer

 

 

 

 

 

 

 

 

 

3m (10')

 

 

(35,000 Btuh)

 

 

 

 

 

 

 

 

 

 

 

 

 

3m (10')

 

 

 

 

 

 

 

 

 

Outlet C

 

1.5m (5')

Section 1

 

 

 

 

 

 

 

 

 

 

 

 

Section 4

 

Section 3 Section 2

 

 

 

 

 

 

 

 

1.5m (5')

 

 

 

1.5m (5')

 

 

1.5m (5')

 

 

 

 

3m (10')

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.5m (5')

 

 

 

1.5m (5')

 

 

 

 

 

Outlet D

 

 

 

 

 

 

 

Outlet B

 

 

 

3m (10')

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas Fireplace

Gas Range Stove

 

 

 

 

 

 

 

 

 

 

 

 

(25,000 Btuh)

 

(65,000 Btuh)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

 

Meter

**See next page for the pipe capacity charts.

 

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 Calculation

Outlet A: 13.5m (45') (Use 15m (50')), 50,000 Btuh requires 1/2" Outlet B: 12m (40'), 65,000 Btuh requires 1/2"

Section 1: 13.5m (45') (Use 15m (50')), 115,000 Btuh requires 3/4" Outlet C: 9m (30'), 35,000 Btuh requires 1/2"

Section 2: 13.5m (45') (Use 15m (50')), 150,000 Btuh requires 3/4" Outlet D: 7.5m (25') (Use 9m (30')), 25,000 Btuh requires 1/2" Section 3: 13.5m (45') (Use 15m (50')), 175,000 Btuh requires 1" Outlet E: 7.5m (25') (Use 9m (30')), 199,900 Btuh requires 3/4" Section 4: 13.5m (45') (Use 15m (50')), 374,900 Btuh requires 1-1/4"

16

Gas Line Sizing for a Noritz Gas Water Heater

Adapted from UPC 1997

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

Pipe

 

 

 

 

Length in Feet

 

 

 

 

Size

3m (10')

6m (20')

9m (30')

12m (40')

15m (50')

18m (60')

21m (70')

24m (80')

27m (90')

30m (100')

37.5m (125')

1/2"

174

119

96

82

73

66

61

56

53

50

44

3/4"

363

249

200

171

152

138

127

118

111

104

93

1"

684

470

377

323

286

259

239

222

208

197

174

1 1/4"

1404

965

775

663

588

532

490

456

428

404

358

1 1/2"

2103

1445

1161

993

880

798

734

683

641

605

536

2"

4050

2784

2235

1913

1696

1536

1413

1315

1234

1165

1033

2 1/2"

6455

4437

3563

3049

2703

2449

2253

2096

1966

1857

1646

3"

11,412

7843

6299

5391

4778

4329

3983

3705

3476

3284

2910

3 1/2"

16,709

11,484

9222

7893

6995

6338

5831

5425

5090

4808

4261

4"

23,277

15,998

12,847

10,995

9745

8830

8123

7557

7091

6698

5936

 

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

Maximum Liquified Petroleum (Undiluted) Delivery Capacity in Thousands of Btuh (0.5" WC Pressure Drop)

Pipe

 

 

 

 

 

Length in Feet

 

 

 

 

 

Size

3m (10')

6m (20')

9m (30')

12m (40')

15m (50')

18m (60')

21m (70')

24m (80')

27m (90')

30m (100')

37.5m (125')

45m (150')

60m (200')

1/2"

275

189

152

129

114

103

96

89

83

78

69

63

55

3/4"

567

393

315

267

237

217

196

185

173

162

146

132

112

 

1"

1071

732

590

504

448

409

378

346

322

307

275

252

213

1

1/4"

2205

1496

1212

1039

913

834

771

724

677

630

567

511

440

1

1/2"

3307

2299

1858

1559

1417

1275

1181

1086

1023

976

866

787

675

 

2"

6221

4331

3465

2992

2646

2394

2205

2047

1921

1811

1606

1496

1260

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

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

Pipe

 

 

 

 

 

Length in Feet

 

 

 

 

 

Size

3m (10')

6m (20')

9m (30')

12m (40')

15m (50')

18m (60')

21m (70')

24m (80')

27m (90')

30m (100')

45m (150')

60m (200')

3/4"

206

147

121

105

94

86

80

75

71

67

55

48

 

1"

383

269

218

188

168

153

141

132

125

118

94

82

1

1/4"

614

418

334

284

251

227

209

194

181

171

137

116

1

1/2"

1261

888

723

625

559

509

471

440

415

393

320

277

 

2"

2934

2078

1698

1472

1317

1203

1114

1042

983

933

762

661

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

Pipe

 

 

 

 

 

Length in Feet

 

 

 

 

 

Size

3m (10')

6m (20')

9m (30')

12m (40')

15m (50')

18m (60')

21m (70')

24m (80')

27m (90')

30m (100')

45m (150')

60m (200')

3/4"

325

232

191

166

149

136

126

118

112

106

87

76

 

1"

605

425

344

297

265

241

222

208

197

186

143

129

1

1/4"

971

661

528

449

397

359

330

307

286

270

217

183

1

1/2"

1993

1404

1143

988

884

805

745

696

656

621

506

438

 

2"

4638

3285

2684

2327

2082

1902

1761

1647

1554

1475

1205

1045

** For reference only. Please consult gas pipe manufacturer for actual pipe capacities. TracPipe® is a registered trademark of Omega Flex.

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

Pipe

 

 

 

 

Length in Inches

 

 

Size

300mm (12")

600mm (24")

900mm (36")

1200mm (48")

1500mm (60")

1800mm (72")

1/2"

180

150

125

106

93

86

3/4"

 

 

 

290

255

215

197

173

 

 

 

1"

 

 

 

581

512

442

397

347

 

 

 

1 1/4"

 

 

 

1470

1200

1130

960

930

 

 

 

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

Pipe

 

 

 

 

Length in Inches

 

 

Size

300mm (12")

600mm (24")

900mm (36")

1200mm (48")

1500mm (60")

1800mm (72")

1/2"

288

240

200

169

149

137

3/4"

 

 

 

465

409

344

315

278

 

 

 

1"

 

 

 

930

825

708

638

556

 

 

 

1 1/4"

 

 

 

2352

1920

1808

1536

1488

 

 

 

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

17

Installation and service must be performed by a qualified plumber. In the 10. Water Piping 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.

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 plumbing 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.

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

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.

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.

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 necessary, 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 ensure 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.

18

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