Noritz NH150-DV Installation Manual

NORITZ AMERICA

Installation and Instruction Manual

CORPORATION

GAS-FIRED DIRECT VENT BOILER

NH199-DV (Indoor Installation)
NH150-DV (Indoor 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 indicates an imminently hazardous situation which,

DANGER

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

WARNING

CAUTION

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.

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
Power

Ground

Be sure to do

CAUTION

Requests to Installers

• In order to use the boiler safely, read this installation and instruction 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 and instruction
manual upon completion.

•

After completing installation, please either place this
plastic pouch and attach it to the side of the boiler or hand it to the customer. 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
User's information manual.

installation and instruction manual

in a

Complies with

jurisdictions having

40 ng/J or 55 ppm

NOx regulations

(Natural Gas Only)

SBA8383-2

Rev. 03/13

CERTIFIED

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).

R

Where required by the authority having jurisdiction, the installation must con­form to the Standard for Controls and Safety Devices for Automatically Fired
Boilers, ANSI/ASME CSD-1.

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

Noritz America Corporation
11160 Grace Avenue,
Fountain Valley, CA 92708
www.noritz.com

*SBA8383*

1.

Included Accessories

Anchoring Screw

Safety Relief Valve

The following accessories are included with the
boiler in the inside of package.Check for any miss­ing items before starting installation.

User's Information Manual,

Warranty, Installation and

5

Instruction Manual (this document)

Safety Relief Valve

1

Fitting and Gasket

Q’tyShapePartPart Shape Q’ty

1

each

1

Y terminal

Round terminal

2.

Optional Accessories

Flue Terminal

VT4-TL

Pressure & Temperature

4

11

1

Gauge

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

Flue Terminal

VT4-TS

1

Q’tyShapePartPart Shape Q’ty

1

2

55554040

Before Installation

3.

DANGER

Do Not Use Equipment for Purposes Other Than Those Specified

• The NH199-DV/ NH150-DV is a boiler to be used for space heating or indirect water heating
only. Do not use the hot water supplied by the boiler for drinking purposes.

• This boiler has a pressure rating of up to 150 psi, but it is designed to be used in a low pres­sure (15 psi) closed loop heating system. Use a 30 psi relief valve.

Checkup

• Once a year, check the fixing brackets, the air supply and exhaust pipes and the flue terminals
to see if they need to be replaced.

WARNING

Precautions on Vent Pipe Replacement

• The vent system will almost certainly need to be replaced when this appliance is being installed.
Use vent pipe that is listed to UL 1738 for Category III appliances for the exhaust venting. Category
III listed vent pipe is suggested for the air supply pipe also, but other materials may be acceptable.
Consult local codes.
* If Category III listed vent pipe is already installed, check for punctures, cracks or blockages and

consult with the vent pipe manufacturer before reusing.

Use Approved Vent Materials

• Use only vent materials that are listed to UL 1738 for Category III appliances for the exhaust venting
of this appliance.
Improper venting may result in fires, property damage or exposure to Carbon Monoxide.

Snow Precaution

• If this product will be installed in an area where snow is known to accumulate, protect the vent
termination from blockage by snow drifts or damage from snow falling off of roofs.

Check the Gas

• Check that the rating plate indicates the correct type of gas.

• Check that the gas supply line is sized for 199,900 Btuh for
the NH199-DV, or 150,000 Btuh for the NH150-DV.

Check the Power

• The power supply required is 120VAC, at 60Hz.
Using the incorrect voltage may result in fire or electric shock.

CAUTION

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.

Use the Specified Anti-Freeze

• When using anti-freeze, use Noritz approved anti-freeze only.
Using an anti-freeze other than one specified by Noritz could lead to leakage of fluid (water) or
clogging of pipes.

3

Choosing Installation Site

4.

* Locate the appliance in an area where leakage from the boiler or connections will not result in dam-

age 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.

* Install this boiler in a way that the constituent parts of the gas ignition system are protected from water

(water drops, spray, rain, etc.) during device operation and repair (circulator replacement, drain trap
or control device replacement, etc.).

DANGER

• 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.

WARNING

• The boiler is designed for indoor installation only.Never install it
outdoors or in a bathroom, it may be damaged or a fire may be
caused.

• 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.

Prohibited

• 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 boiler in a
mobile home, recreation vehicle or on a boat.

Prohibited

CAUTION

• Consult with the customer concerning the location of installation.

• Install the boiler in an area that allows for the proper clearances to combustible and noncombus­tible construction. Consult the rating plate on the appliance for proper clearances.

• 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.

• Do not install the boiler in a place where it may be threatened by falling objects, such as under
shelves.

• The boiler must be installed in a place where supply and exhaust pipes can be installed as
directed.

• Do not install the boiler 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 boiler may cause discoloration of walls and resino us materials,
or corrosion of aluminum materials.

4

CAUTION

• 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 that the exhaust flue termination
will have the proper clearances according to the National Fuel
Gas Code (ANSI Z223.1).

• 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).

Prohibited

Be sure to do

Prohibited

State of California: The boiler 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.

For Venting Manufacturers Requirements, see websites or phone numbers listed below:
Noritz N-Vent www.noritz.com

5

5. 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.

Item

• Maintain the following clearances
from both combustible and
non-combustible materials.

Distance from combustibles

• 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-

repair/inspection

tion and repair if necessary

Securing of space for

Check Illustration

2" or
more

Distance from
the side

8" or
more

8" or
more

24" or
more

12"
or
more

4" or
more

3"

or more

3"

or more

6

Clearance Requirements from Vent Terminations to Building Openings

* All clearance requirements are in accordance with ANSI Z21.13 and the National Fuel Gas Code,

ANSI Z223.1 and in Canada, in accordance with NSCNGPIC.

D

E

L

B

DescriptionRef

Clearance above grade, veranda, porch,

A=

deck, or balcony
Clearance to window or door that may

B=

be opened

C=

Clearance to permanently closed window

Vertical clearance to ventilated soffit
located above the terminal within a

D=

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

E=

Clearance to unventilated soffit
Clearance to outside corner

F=
G=

Clearance to inside corner

Clearance to each side of center line

H=

extended above meter/regulator assembly

I=

Clearance to service regulator vent outlet
Clearance to nonmechanical air supply

J=

inlet to building or the combustion air inlet
to any other appliance

Clearance to a mechanical air supply inlet

K=

Clearance above paved sidewalk or paved

L=

driveway located on public property
Clearance under veranda, porch, deck,

M=

or balcony

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).

C

F

B

G

A

B

B

B

B

J

A

Vent Terminal

Air Supply Inlet

Canadian Direct Vent

Installations

12 in (30 cm)

36 in (91 cm)

3 ft (91 cm) within a height
15 ft (4.5 m) above the
meter/regulator assembly

3 ft (91 cm)

36 in (91 cm)

6 ft (1.83 m)

7 ft (2.13 m)†

12 in (30 cm)‡

1

*

*

*
*
*

H

I

M

K

Area Where Terminal
is Not Permitted

US Direct Vent

Installations

12 in (30 cm)

12 in (30 cm)

12 in (30 cm)

3 ft (91 cm) above if within

10 ft (3 m) horizontally

2

*

*

*
*
*

*
*

*

*

7

6. Installation

Securing to the wall

• 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 sure to do

be damaged and may become highly dangerous.

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

Item

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 boiler by
the upper wall mounting bracket.

Locating Screw Holes

3. Determine the positions for the remaining four screws
(two for the top bracket and two for the bottom), and
remove the boiler.

4. Drill holes for the remaining four screws.

5. Hang the boiler 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

Mounting

device.

IllustrationCheck

Location of Screw Hole

Mounting Bracket
(upper)

Locating Screw Holes

Anchoring Screw

• Make sure the boiler is installed securely so that it

will not fall or move due to vibrations or earth­quakes.

Structure

• If this boiler is being installed at an elevation of 2,000

ft. (610m) 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 boiler before disconnecting

this connector. Failure to perform this step will result in
a "733" code displayed on the boiler control panel and
a cease in operation. If this occurs, disconnect, then

Above 2,000 ft.

reconnect power to the boiler to reset the system.

Installations at Elevations

8

DISCONNECT

HIGH ELEVATION

Vent Pipe Installation

7.

Vent Terminal Installation

•

Follow the installation instructions included with the vent terminal. It is suggested that the appliance be vented horizontally
through a sidewall. If a vertical vent termination is required, it must follow the requirements of this section (p.9-12).

Vent Terminal Installation Precautions

• Do not install the vent terminal indoors • Install the vent terminal with a downward slope

• Install with the proper length protruding through the wall

Proper installation. The
red line can be seen,but
the red rectangle cannot
be seen from the outside.

Avoid installing the terminal where obstacles will block it

•

Vent terminal

Snow
drift

not far
enough

Note the following vent terminal installation requirements

upward

slope

Gasoline

Vent terminal

Tree

downward

slope

too far

•

Clearance from vent terminal.
If multiple boilers are installed, terminals
must be separated by a minimum of
either 12" horizontally or 60" vertically.

•

12" or more

Avoid storing hazardous
objects near the terminal

Gas

60" or more

• Do not cover the vent terminal with any type of
protective screen or enclosure. Blocked terminals
can cause abnormal combustion resulting in undes­ired performance from the boiler.

Vent terminal models

• Use only the following models of Noritz
vent terminals with this boiler.

VT4-TL

•

Vent

•

Vent terminal size variations are listed in the table below.
Choose the model according to the wall thickness required.

VT4-TS

•

terminal

Model
VT4-TL-5 3.5" to 5.1"
VT4-TL-8 5.1" to 8.3"

VT4-TL-14 8.3" to 14.6"
VT4-TL-27 14.6" to 27.2"

(for long vent runs)
(to be installed directly

on top of the appliance)

Wall thickness (in.)

Vent system installation example

Elbows

Intake pipe

Vent terminal

Straight pipe

Exhaust
pipe

Elbow

Boiler

Use a listed Category III vent adapter
to connect the flue collar to the vent
system. Use Category III vent pipe
for the entire length of the exhaust pipe.

Vent terminal

Vent terminal

sloping down

9

Be sure to do

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

Venting Precautions

• Use 4" diameter Category III vent pipe.

• Maximum vent length
Number of 90

degree elbows

4
3
2
1

* Not including the termination

• Exceeding the maximum vent length is danger-

ous and may result in bad combustion.

• If possible,don ’t install the vent pipe through any

enclosed areas. If necessary,consult the pipe
manufacturer ’s instructions for clearances.

•

Install the vent terminal so that all exhaust is di­rected to and all intake air is taken from outdoors.

• In the Commonwealth of Massachusetts a car-

bon monoxide detector is required for all side
wall horizontally vented gas fuel equipment.
Please refer to Technical Bulletin TB 010606 for
full installation instructions.

• Do not store hazardous or flammable sub-

stances near the vent terminal and check that it
is not blocked in any way.

• Slope the intake and exhaust pipes downwards

1/4" for every 12" towards the termination.

• Use only UL listed Category III venting products.

• Connect the vent pipe firmly so that it will prevent

exhaust gases from leaking.

•

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 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.

Maximum

Vent Length*

39'
45'
51'
57'

• Support the vent pipe with hangers at intervals
as required by the vent pipe manufacturer ’s in­stallation instructions.

• Install the vent terminal so that it is easily
accesible for maintenance both from the indoors
and the outdoors.

• If the vent terminal will be installed higher than
the boiler, make the vertical section directly
above the boiler as short as possible,and slope
down to the terminal. Do not have another verti­cal section after the horizontal section begins.

• Make the vertical pipe as short as possible.

• Follow the vent pipe manufacturer's installation

instructions.

• Maintain the same vent pipe diameter all the

way to the end.

• Maintain the following clearances for the

exhaust pipe to combustibles:

Manufacturer and Enclosed Unenclosed

Product Hor. Vert. Hor. Vert.

Noritz N-Vent 4" 1" 1"

Clearances vary by manufacturer, refer to the UL
approved clearances when using materials other
than N-Vent.

• Do not common vent or connect more than
one appliance to this venting system.

• Terminate at least 12"above grade or snow line

• Terminate at least 7'above a public walkway

• Use a condensation drain if necessary

Appliance Adapters

When using a vent system other than N-Vent, an
appliance adapter will be required to properly
connect the vent to this appliance. Consult the
manufacturer's instructions for the proper appli­ance adapter.

10" (sides)
15"(top)
6"(bottom)

10