Noritz NRC661A-OD Installation Manual
NORITZ AMERICA
*SBB8068*
Installation Manual
CORPORATION
CONDENSING TANKLESS GAS WATER HEATER
(Outdoor Installation)
NRC711-OD
NRC661A-OD
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.
(Outdoor Installation)
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
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.
SBB8068-2
Rev. 08/15
Low NOx Approved by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
FOR USE IN RESIDENTIAL 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 54latest edition.
When applicable, installation must conform with the Manufactured
Home Construction and Safety Standard, Title 24 CFR, Part 3280.
Noritz America reserves the right to discontinue, or change at any
time, the designs and/or specications of its products without notice.
1.
The following accessories are included with the unit.
Included Accessories
Check for any missing items before starting installation.
Part Shape
Cross Recessed
Head Screw
2.
Optional Accessories
Remote Controller
(See p. 21)
Isolation Valves*
(includes pressure
relief valve)
Q’ty
3
Q’ty
1
1
ShapePart
Owner's Guide, Warranty,
Installation Manual
(this document)
The accessories listed below are not
included with the units, but may be necessary
for installation.
ShapePartPart Shape
Remote Controller
Cord (10ft (3m))
Remote Controller
Cord (26ft (8m))
Remote Controller
Outdoor
Junction Box
Q’ty
1
each
Q’ty
1
1
1
Recess Box
(RB-510)
Neutralizer
(NC-1)
* Isolation valves are necessary for ushing the Heat Exchanger.
They allow for easy ushing of the system.
1
Pipe Cover
(PC-1S)
1
1
2
Before Installation
Indoor
3.
Check the Gas
• Check that the rating plate indicates the
correct type of gas.
• Check that the gas supply line is sized for
157,000 Btuh for NRC711-OD series.
(120,000 Btuh for NRC661A-OD series.)
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
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 manual.
WARNING
.
CAUTION
Do Not Use Equipment for Purposes Other Than Those Specied
• 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
4.
* 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.
This will cause carbon monoxide
poisoning and a potential re
hazard.
3
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).
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) The outdoor units (OD) can only be used if they are for summer use only.
2) The water heater can be used for hot water only and not in a combination of domestic and space
heating.
Prohibited
4
Installation Clearances
5.
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.
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
• 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 such as the wall of the second oor where the unit
Surrounding the area of installation
is out of reach.
▲The illustration is an example. Please check with the actual water heater about the position of piping, and form.
24" (600mm)
or more
Handrail
balcony, etc.
5
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
L=
Clearance above paved sidewalk or paved
driveway located on public property
Clearance under veranda, porch, deck,
or balcony
M=
1
In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
Clearance to opposite wall is 24 inches (60 cm).
*
*
*
*
*
*
*
*
3 ft (91 cm) above if within
10 ft (3 m) horizontally
*
12 in (30 cm)
4 ft (1.2 m) below or to side
of opening; 1 ft (30 cm)
above opening
4 ft (1.2 m) below or to side
of opening; 1 ft (30 cm)
above opening
US Non-Direct Vent
Installations
1
Vent Terminal
D
E
B
B
F
B
A
G
H
I
C
B
M
K
J
B
B
L
Air Supply Inlet
Area Where Terminal
is Not Permitted
A
* All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code,
ANSI Z223.1.
6
Installation
* Do not change any other DIP switches.
* High elevation adjustment.
65
2,001 - 4,000 ft (611 - 1,220m)
0 - 2,000 ft (0 - 610m)
ON= OFF=
4,001 - 6,000 ft (1,221 - 1,830m)
6,001 - 8,000 ft (1,831 - 2,440m)
6.
Securing to the wall
• The weight of the device will be applied to the wall. If the strength of the wall is not sufcient,
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 inict 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 waterproong 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
(Arrangement at the eld)
• 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.
▲The illustration is an example. Please check with the actual water heater about the position of piping, and form.
• Disconnect power to the water heater before changing
the DIP switches. Failure to perform this step will result
in a "733" code displayed on the Display Window and
a cease in operation. If this occurs, disconnect, then
Above 2,000 ft.
reconnect power to the water heater to reset the system.
Installations at Elevations
7
7.
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, contact your water heater supplier for
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 qualied service agency in
accordance with the manufacturer’s instructions and all applicable codes and requirements of the
authority having jurisdiction. The qualied service agency is responsible for the proper installation of this
kit. Improper installation of this kit will void the warranty. Conversion kits will only be shipped directly to
the Distributor or Agency performing the conversion.]
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 specied
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. Supplied
gas pressure must be within the limits shown in the specications section with all gas appliances operating.
The inlet gas pressure must be within the range specied. This is for the purposes of input adjustment. 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.
8
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. 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
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.
9
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