Noritz America NCC300OD Installation Manual

NORITZ AMERICA

*SBB80YZ*

CERTIFIED

R

Installation Manual

CORPORATION

CONDENSING TANKLESS GAS WATER HEATER

NCC300OD (GQ-C5032WZ US)

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

WARNING

CAUTION

WARNING:

causing property damage, personal injury or death.

Prohibited

If the information in this manual is not followed exactly, a re or explosion may result

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.

Disconnect
Power

(Outdoor Installation)

Ground

Be sure to do

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 ll in all of the required

items on the warranty and to hand the warranty to the customer along with the Owner's Guide.

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.

Low NOx Approved by SCAQMD

14 ng/J or 20 ppm

(Natural Gas Only)

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.

SBB80YZ

Rev. 08/17

1.

The following accessories are included with the unit.

Included Accessories

Check for any missing items before starting installation.

Part Shape

Anchoring Screw

Remote Controller

2.

Remote Controller

Optional Accessories

Cord (26ft (8m))

Isolation Valves*

(includes pressure

relief valve)

Q’ty

7

1

Q’ty

1

1

each

ShapePart

Owner's Guide, Warranty,

Installation Manual

(this document)

Remote Controller

Cord (6ft (2m))

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

ShapePartPart Shape

Quick Connect Cord

(QC-2)

Pipe Cover

(PC-7S)

Q’ty

1

each

1

Q’ty

1

1

System Controller Unit

System Controller

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

Noritz Connect

Wireless Adapter

NWC-ADAPTER

(NAW-1 US)

* Isolation valves are necessary for ushing the Heat Exchanger.
They allow for easy ushing of the system.

1

1

SCU-301-12M
SCU-401-12M
SCU-401-24M

Neutralizer

(NT20A)

(For up to 10 water heaters)

1

1

2

Make this distance as
short as possible.
The hot water temperatur
will become unstable as
the pipe length increases.

maximum flow rates of the units.

Distance on sides

G

Quick Connect
Cord

Remote Controller Cord

Gas Supply Piping

Cold Water Supply

Hot Water

Remote Controller

Terminal Block

Cord
Connector

Cord
Connector

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 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 difference in pipe length

between the two units).

System Diagram

Typical Plumbing

* When connecting two units, use only a

single remote controller.

Note: Connect the remote

controller to only one
of the units.

Units must be same

model in order to
quick connect.

3-17" (75-432mm)

• 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.

Quick Connect Cord

Pressure
Relief Valve

Isolation Valve*

e

* Isolation valves are

necessary for flushing
the Heat Exchanger.
They allow for
easy flushing of

the system.

Union

Gas Valve

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.

To drain outletTo drain outlet

The backflow preventer should be placed
upstream of the cold water branch.

Size the piping to allow for the

Hot Water

Cold Water

To drain outlet

3

Before Installation

Indoor

4.

WARNING

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.
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.

CAUTION

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.

Choosing Installation Site

5.

* 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.

DANGER

• This water heater is for outdoor installation only.
Never install it indoors.

Do not enclose the termination with corrugated

metal or other materials.

4

This will cause carbon monoxide

poisoning and a potential re

hazard.

WARNING

• 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.

CAUTION

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

• Consult with the customer concerning the location of installation.

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

Prohibited

• 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.

• Install in a location where the exhaust gas ow 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.

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

• Before installing, make sure that the vent 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).

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.

The Commonwealth of Massachusetts:

1) This water heater can only be used in outdoor applications if the usage is restricted to summertime

usage exclusively.

2) The water heater can be used for hot water only and not in a combination of domestic and space

heating.

Prohibited

5

Installation Clearances

6.

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 the Natural Gas and Propane Installation

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

Item Check

• Maintain the following clearance from both combustible

and non-combustible materials.

Required Clearances From Heater

• When installing the unit in a common side corridor, provide
a clearance of 47" (1,190mm) or more in front of the unit.

• Set the bottom edge of the exhaust port about

84" (2,130mm) from the corridor oor.

Handrail

Illustration

24" (600mm)

or more

36" (900mm)

or more

6" (150mm)

or more

47" (1,190mm) or more

about 84"

(2,130mm)

common side
corridor

6

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

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

• Provide clearance of 24" (600mm) or more in front of
the unit to facilitate inspection and repair. Do install the

unit in a location where the unit is out of reach, such as

Surrounding the area of installation

the wall of the second oor.

24" (600mm)

or more

Handrail

balcony, etc.

Clearance Requirements from Vent Terminations to Building Openings

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

D=

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

J=

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)†

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)

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

2

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.

7

Installation

* Do not change any other dipswitches.

* High elevation adjustment.

7.

Securing to the wall

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

Check

CAUTION

• 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.

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.

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 unit.

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

Mounting

device.

Illustration

Location of Screw Hole

Mounting Bracket
(upper)

Locating Screw Holes

Anchoring Screw

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

not fall or move due to vibrations or earthquakes.

Structure

• 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

Above 2,000 ft.

to reset the system.

Note : Please refer to page 25 for the location of the

Installations at Elevations

dip switch bank.

8

5

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

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

ON=OFF=

8.

Gas Piping

Follow the instructions from the gas supplier.

CAUTION

The guidelines and examples we have provided in this manual section are for reference only.
The sizing and installation of the gas system for this water heater, as with any gas appliance, is the
sole responsibility of the installer. The installer must be professionally trained to do such work and

must always follow all local and national codes and regulations. Gas line sizing calculations must

be performed for every installation. Please contact Noritz America at 866-766-7489 if you have any

questions or concerns.

Gas Type

The gas type indicated on the water heater rating plate (NG or LP) must match the type of gas being
supplied to the water heater.

Gas Conversions

If the gas type supplied does not match the gas type on the rating plate, obtain a replacement unit with
the proper gas type.　If a gas type conversion must be made, there are conversion kits available for
some models. [The conversion kit shall be installed by a qualied service agency in accordance with
the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction.
The qualied service agency is responsible for the proper installation of this kit. Improper installation of

this kit will void the warranty.]

Meter

The gas meter must be sized properly for the water heater and other gas appliances to operate properly.
Select a gas meter capable of supplying the entire btuh demand of all gas appliances in the building.

CAUTION

Regulators

Ensure that all gas regulators used are operating properly and providing gas pressures within the specied
range of the water heater being installed. Excess gas inlet pressure may cause serious accidents.

WARNING

Pressure

Check the gas supply pressure immediately upstream at a location provided by the gas company.
plied gas pressure must be within the limits shown in the specications section with all gas appliances
ing. The inlet gas pressure must be within the range specied. This is for the purposes of input
ment. Low gas pressure may cause a loss of ame or ignition failure at other appliances in the home, which
may result in unburned gas in the home. Serious accidents such as re or explosion may result.

Measuring Gas Pressure

In order to check the gas supply pressure to the unit, a tap is provided on the
gas inlet. Remove the 9/32” hex head/Philips screw from the tap, and connect
a manometer using a silicon tube. Open up at least 2 xtures and hold in the
maximum manifold pressure button on the circuit board. Please call Noritz for

details.

Sup-

operat-

adjust-

9

WARNING

Pressure Test

The appliance and its gas connections must be leak tested before placing the appliance in operation.
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 ½ psig (3.5 kPa). We do not recommend pressure testing in excess of ½ psig (3.5kPa).
If it must be done, the appliance and its individual shutoff valve must be completely disconnected
from the gas supply piping system during the test process.

Pipe Sizing/Flexible Connectors

A gas shutoff valve must be installed on the supply line. Gas ex lines are not recommended unless
the minimum inside diameter is ¾” or greater and the rated capacity of the connector is equal to or
greater than the BTU capacity of the water heater. Gas piping shall be in accordance with local utility
company requirements and/or in the absence of local codes, use the latest edition of National

Fuel Gas Code (NFPA54GC), ANSI Z223.1. In Canada, use the latest edition of CSA B149.1,

National Gas and Propane installation code. 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 5 ” WC
Max 10.5” WC

LP Gas Supply Pressure
Min 8” WC
Max 14” WC

Reference Tools & Sample Calculations

CAUTION

The tables and samples below are for reference only. The professional sizing and installing the gas
line should always run the appropriate calculations before all installations.

Which Table to Use

• For NG installations with the initial supply pressure at point of delivery (at the meter, for example) is
less than 8” WC, use the 0.5” WC pressure drop table (Table 1).

• For NG installations with the initial supply pressure at point of delivery is greater than or equal to 8”
WC, use the 3.0” pressure drop table (Table 2).

• For all LP installation use (Table 3)

The inlet pressure must be at least 5” WC for NG or 8” WC for LP for all appliances in the gas system.
If the inlet gas pressure drops below 5” WC for NG or 8” WC for LP, the heater may continue to operate,
but the other appliances in the house may experience ame loss or ignition failure, which can result in gas

leakage into the home. Refer to the NFPA 54 for details.

Please contact Noritz for details. For corrugated stainless steel tubing (CSST) capacity tables, please
consult with the manufacturer.

10

Table 1. For Less than 8” WC initial supply pressure

Instructions

Sample Gas Line

Natural Gas

Noritz Condensing

Natural Gas

Meter

Instructions

Sample Gas Line

able)

Noritz Condensing

Maximum Natural Gas Delivery Capacity (0.5” Pressure Drop) [Schedule 40 Metallic Pipe]

Pipe

Size

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

(3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m)

3/4" 360 247 199 170 151 137 126 11 7 110 104 92

1" 678 466 374 320 284 257 237 220 207 195 173
1 1/4" 1,390 957 768 657 583 528 486 452 424 400 355
1 1/2" 2,090 1,430 1,150 985 873 791 728 677 635 600 532

2" 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020
2 1/2" 6,400 4,400 3,530 3,020 2,680 2,430 2,230 2,080 1,950 1,840 1,630

3" 11,300 7,780 6,250 5,350 4,740 4,290 3,950 3,670 3,450 3,260 2,890

4" 23,100 15,900 12,700 10,900 9,660 8,760 8,050 7,490 7,030 6,640 5,890

Values in Table are in Cubic Feet of Gas per Hour (0.60 Specic Gravity, 0.5” Pressure Drop, inlet pressure less than 2psi). Contact your gas
supplier for BTU/Cubic Foot ratings. For simplication of your calculations, 1 Cubic Foot of Gas is approximately equivalent to 1000 BTU.

Length (including ttings)

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 - (Using 0.5” WC Pressure Drop Table)

Outlet A: 45' (13.5m) (Use 50' (15m)), 50,000 Btuh requires 1/2"
Outlet B: 40' (12m), 65,000 Btuh requires 1/2"
Section 1: 45' (13.5m) (Use 50' (15m)), 115,000 Btuh requires 3/4"
Outlet C: 30' (9m), 35,000 Btuh requires 1/2"
Section 2: 45' (13.5m) (Use 50' (15m)), 150,000 Btuh requires 3/4"
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2"
Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1"
Outlet E: 25' (7.5m) (Use 30' (9m)), 300,000 Btuh requires 3/4"

Outlet E

Section 4

10' (3m)

Tankless Gas Water Heater

(300,000 Btuh)

10' (3m)

Section 3 Section 2

Outlet D

Gas Fireplace
(25,000 Btuh)

Clothes Dryer
(35,000 Btuh)

Outlet C

5' (1.5m)5' (1.5m) 5' (1.5m)

5' (1.5m)

5' (1.5m)

Outlet A

Section 1

10' (3m)

Outlet B

Barbecue

(50,000 Btuh)

10' (3m)

5' (1.5m)

Gas Range Stove

(65,000 Btuh)

Section 4: 45' (13.5m) (Use 50' (15m)), 475,000 Btuh requires 1 1/4"

Meter

Table 2. For 8” WC – 10.5” WC initial supply pressure

Maximum Natural Gas Delivery Capacity (3.0” Pressure Drop) [Schedule 40 Metallic Pipe]

Pipe

Size

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

(3m) (6m) (9m) (12m) (15m) (18m) (21m) (24m) (27m) (30m) (38m)

1/2" 454 312 250 214 190 172 158 147 138 131 116
3/4" 949 652 524 448 397 360 331 308 289 273 242

1" 1,787 1,228 986 844 748 678 624 580 544 514 456

1 1/4" 3,669 2,522 2,025 1,733 1,536 1,392 1,280 1,191 1,118 1,056 936
1 1/2" 5,497 3,778 3,034 2,597 2,302 2,085 1,919 1,785 1,675 1,582 1,402

2" 10,588 7,277 5,844 5,001 4,433 4,016 3,695 3,437 3,225 3,046 2,700

2 1/2" 16,875 11,598 9,314 7,971 7,065 6,401 5,889 5,479 5,140 4,856 4,303

3" 29,832 20,503 16,465 14,092 12,489 11,316 10,411 9,685 9,087 8,584 7,608

4" 43,678 30,020 24,107 20,632 18,286 16,569 15,243 14,181 13,305 12,568 11,139

Values in Table are in Cubic Feet of Gas per Hour (0.60 Specic Gravity, 3.0” Pressure Drop, 8.0” WC or greater supply pressure, inlet
pressure less than 2psi). Contact your gas supplier for BTU/Cubic Foot ratings. For simplication of your calculations, 1 Cubic Foot of
Gas is approximately equivalent to 1000 BTU.

Length (including ttings)

Tankless Gas Water Heater

(300,000 Btuh)

Outlet E

Section 4

10' (3m)

10' (3m)

Outlet D

Outlet C

Section 3 Section 2

5' (1.5m)5' (1.5m) 5' (1.5m)

5' (1.5m)

Gas Fireplace
(25,000 Btuh)

Clothes Dryer
(35,000 Btuh)

5' (1.5m)

Outlet A

Section 1

10' (3m)

Outlet B

Gas Range Stove

Barbecue

(50,000 Btuh)

10' (3m)

5' (1.5m)

(65,000 Btuh)

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 (Using 3.0” WC Pressure Drop T

Outlet A: 45' (13.5m) (Use 50' (15m)), 50,000 Btuh requires 1/2"
Outlet B: 40' (12m), 65,000 Btuh requires 1/2"
Section 1: 45' (13.5m) (Use 50' (15m)), 115,000 Btuh requires 1/2"
Outlet C: 30' (9m), 35,000 Btuh requires 1/2"
Section 2: 45' (13.5m) (Use 50' (15m)), 150,000 Btuh requires 1/2"
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2"
Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1/2"
Outlet E: 25' (7.5m) (Use 30' (9m)), 300,000 Btuh requires 3/4"
Section 4: 45' (13.5m) (Use 50' (15m)), 475,000 Btuh requires 3/4"

11

Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of
BtuH (0.5” WC Pressure Drop) [Schedule 40 Metallic Pipe]

Pipe

Size

1/2" 291 200 160 137 122 11 0 101 94 89 84 74 67
3/4" 608 418 336 287 255 231 212 197 185 175 155 140

1" 1,150 787 632 541 480 434 400 372 349 330 292 265
1 1/4" 2,350 1,620 1,300 1,110 985 892 821 763 716 677 600 543
1 1/2" 3,520 2,420 1,940 1,660 1,480 1,340 1,230 1,140 1,070 1,010 899 814

2" 6,790 4,660 3,750 3,210 2,840 2,570 2,370 2,200 2,070 1,950 1,730 1,570

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

10' 20' 30' 40' 50' 60' 80' 100' 125' 150' 175' 200'

(3m) (6m) (9m) (12m) (15m) (18m) (24m) (30m) (38m) (45m) (53m) (60m)

Length (including ttings)

CAUTION

Final Check

When the installation is complete, verify that inlet gas pressure for the entire gas system does not
drop below 5” WC for NG or 8” WC for LP at all appliances. This can be tested by turning on all
gas burning appliances including the water heater, then check the inlet pressure at each appliance
to verify all appliances are receiving a minimum of 5” WC for NG or 8” WC for LP. If all appliances
are not receiving the minimum inlet pressure the gas piping system may need to be changed.

12

Installation and service must be performed by a qualied plumber. In the

Completely insulate
the water inlet and
outlet fittings.

Insulate the water
supply valve completely.

Do not cover the water
drain plug with insulation
so that water in the pipe
can be drained.

Commonwealth of Massachusetts, this product must be installed by a licensed

9.

This appliance is suitable for combination potable water and space heating applications. It cannot be used for space
heating applications only. Do not use this appliance if any part has been underwater. Immediately call a qualied
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 backow 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 300,000 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 ow 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.

Water Piping

plumber or gas tter in accordance with the Massachusetts Plumbing and Fuel
Gas Code 248 CMR Sections 2.00 and 5.00. Observe all applicable codes.

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

• Perform the following insulation measures for prevention of freezing.

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

insulation materials, using electric heaters) according to the climate

of the region to prevent the pipe from freezing.

- Make sure that there are no water leaks from the cold and hot water
supply pipes, then insulate the pipes completely.

- Be sure to also completely insulate the water supply valve and the
cold and hot water connections on the water heater (refer to the g-

ure on the right).

- Do not cover the water drain plug with insulation so that water in the
pipe can be drained. (Refer to the gure in the right.)

•

Use a union coupling or exible 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.

13