Noritz NRCP98-DV User manual

Installation Manual
CONDENSING TANKLESS GAS WATER HEATER
WARNING
–Donotstoreorusegasolineorotherinammablevaporsandliquidsinthevicinityofthisoranyother
appliance.
– WHAT TO DO IF YOU SMELL GAS
 •Donottrytolightanyappliance.
 •Donottouchanyelectricalswitch;donotuseanyphoneinyourbuilding.
 •Immediatelycallyourgassupplierfromaneighbor’sphone.Followthegassupplier’sinstructions.
 •Ifyoucannotreachyourgassupplier,calltheredepartment.
–Installationandservicemustbeperformedbyaqualiedinstaller,serviceagencyorthegassupplier.
Iftheinformationintheseinstructionsisnotfollowedexactly,areorexplosionmayresult,
causingpropertydamage,personalinjury,ordeath.
ThankyouforpurchasingthisNoritzTanklessGasWaterHeater.
Beforeusing,please:
Readthisguidecompletelyforoperationinstructions.
Completelylloutthewarrantyregistrationcard(includedseparately)andmailthedetachableportiontoNoritz
AmericaCorporation.Keepthisguide(andtheremainderofthewarrantyregistrationcard)where
itcanbefoundwhenevernecessary.
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).
NoritzAmericareservestherighttodiscontinue,orchangeatanytime,thedesignsand/orspecicationsofits
productswithoutnotice.
NRCP111- DV / NRCP9 8 - DV
• Natural Gas(NG) / Propane Gas (LP)
Models
Rev.07/19
c

2
Chapter 1 Product Accessories 1-1 Included Accessories 3
1-2 Optional Accessories 3
Chapter 2 Product Specications 2-1 Specications 6
2-2 Dimensions & Connections 7
Chapter 3 Safety Requirements 3-1 Safety Precautions 8
3-2 Before Installation 9
3-3 Choosing Installation Site 10
3-4 High Elevation Installations 12
3-5 Installation Clearance 12
Chapter 4 Installation 4-1 Securing to the wall 15
4-2 Vent Pipe Installation 16
4-3 Gas Piping 23
4-4 Water Piping 26
4-5 Condensate Piping 28
4-6 Plumbing Application 29
4-7 Electrical Wiring 34
4-8 Setting the Control Panel 35
4-9 Quick Connect Multi System Installation 43
4-10 Common Vent 45
4-11 Trial Operation 47
Chapter 5 Maintenance 5-1 Maintenance 48
5-2 Final Check List 50

3
SUBJECT
MODEL COUNTRY BUYER CLIENT
PAGE
BRAND DATE
PROCESS DESIGNED BY CHEKED BY
SIZE / SCALE MATERIAL
FINISING
COLOR
NOTE
2018 . 12 . 24
김상훈추준영Print
NORITZ
80g 모조지
2단 접지
노리츠 공용 ENG NORITZ
297 x 210 (mm) / NONE
■ K100
노리츠용 프리미엄 온수기(NRCP 2)_Spare parts kit label
210
297
Part Shape Qty
Water
Heater 1
Emergency
Kit 1
Part Shape Qty
Owner’s Guide,
Installation Manual,
Technical Data Sheet,
Quick Installation Guide,
Part List, Warranty
Card
1
Vent Screens with
Finishing
(3")
2
Anchors /Wall
mounting bracket 1
1-1. Included Accessories The following accessories are included with the box. Check for any missing
items before starting installation.
1-2. Optional Accessories The accessories listed below are not included with the unit, but may be
necessary for installation.
Chapter1.–ProductAccessories
Part Shape Qty
PVC Concentric
Terminal
2"(50mm):‘PVC-2CT’
3"(75mm):‘PVC-3CT’
1
PVC Terminal
‘PRC-1’ 1
SV Conversion Kit
‘SV-CK-3’
•90 Elbow
(With Inlet Screen)
1
Neutralizer
‘NC-1S’
(For 1 water heater)
1
Part Shape Qty
Horizontal Hood
Termination
‘PVT-HL’
1
Isolation Valves
(includes
pressure
relief valve)
1
Crossover Valve
‘cCS-V’ 1
Quick
Connect
Cord
‘QC-NRCP-1’
1
Qty Shape
NPA265
NPA286
NPJ285

4
Part Shape Qty
Temperature Sensor
(2 ties included)
1
Wire for Temperature
Sensor
(4.0 ft [1.2 m])
1
Part Shape Qty
Push Button
Switch
2
Manual 1
Part Shape Qty
Outdoor Vent Cap
(w/Plate and Packing)
1
Exhaust Pipe 1
Exhaust Pipe
Stopper 1
VCK Exhaust
Adapter
(w/ P75 O-ring and
Packing)
1
Chapter1.–ProductAccessories
■ On-Demand (Title 24) Kit (IHK-NRCP)
■ Outdoor Kit (VCK-NRCP-1)
Part Shape Qty
Hexagon Head
with Flange
Tapping Screw
(M4 x12)
4
Truss Head
Tapping Screw
(M4 x16)
2
Manual 1
Vent Screen 1
(Outdoor Vent Cap)
(Vent Screen)

5
■ Pipe Cover Kit (PC-9S)
Part Shape Qty
Front Cover 1
Left Plate 1
Right Plate 1
Front Cover Bracket 1
Case Bracket 2
Part Shape Qty
Frame Bracket 1 2
Frame Bracket 2 1
Dry Wall Anchor 2
Screws (M4x10L) 12
Knob 1
Manual 1
Chapter1.–ProductAccessories

6
Chapter2.–ProductSpecications Specications
ModelName NRCP111-DV NRCP98-DV
Gas Input Rate
MAX 199,000 Btu/h 180,000 Btu/h
MIN 18,000 Btu/h 18,000 Btu/h
High Elevation (2,500~4,500ft) 180,000 Btu/h 180,000 Btu/h
Hot Water Capacity
35°F Rise 11.1 Gal 10.1 Gal
45°F Rise 8.7 Gal 7.8 Gal
77°F Rise 5.1 Gal 4.6 Gal
Installation Indoor / Outdoor Wall Hung
Flue System Sealed Combustion Direct Vent, Single Vent, Outdoor
Max Vent Run 2″(50ft) / 3″(100ft) Schedule 40 PVC, CPVC
Orice Size NG (Gas / Needle) 0.381″(9.7mm) / 0.389″(9.9mm)
LP (Gas / Needle) 0.307″(7.8mm) / 0.315″(8.0mm)
Gas Supply Pressure NG 3.5˝ WC to 10.5˝ WC
LP 8.0˝ WC to 14˝ WC
Manifold Pressure
Gas Type NG LP NG LP
Low Fire 2″ VENT -0.03 WC -0.06 WC -0.03 WC -0.06 WC
3″ VENT -0.03 WC -0.06 WC -0.03 WC -0.06 WC
High Fire 2″ VENT -0.04 WC -0.07 WC -0.04 WC -0.07 WC
3″ VENT -0.04 WC -0.07 WC -0.04 WC -0.07 WC
Power Supply
Main Supply 120V 60Hz
Maximum
Power Consumption 172W(82W+90W_PUMP)
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System Premixed Metal Fiber Burner
Gas Valve System Air ratio valve
Minimum Flow Activation Flow 0.5 GPM
Internal Pipe Material STS 304, Copper Tubing
Dimensions W17.3″ – H28.7″ – D14.8″
Weight 85 lbs
Water Holding Capacity Under 2 Gallon
Control Panel / Circuit Board P-952C / NGTH-9750C
Water Pressure MAX Hot water 150 psi
MIN 15 psi
Materials Casing Cold Rolled Carbon Steel
Heat Exchanger Heat Exchanger : SS 304
Safety Devices
Flame Sensor, Overheat Cut Off Switch ,
Gas Leak Detector, Water Leak Detector
Exhaust Temperature Sensor,
Water Temperature Sensor
2-1. SpecicationsSpecication may be changed without prior notice. The capacity may differ slightly,
depending on the water pressure, water supply, piping conditions, and water temperature.

7
Dimensions & Connections
Chapter2.–ProductSpecications
Description Size
A Exhaust 3"
B Air Intake 3"
C Hot Water 3/4"
D Condensate 1/2"
E Recirculation Return Connection 3/4”
F Cold Water Connection 3/4”
G Gas 3/4"
H Cold Water Filter -
I Recirculation Return FIlter -
NO Name of Component
1
Exhaust
2
Igniter
3
Ignition Plug
4
Burner High Limit Switch
5
Primary Heat Exchanger
6
Secondary Heat Exchanger
7
On-Demand Terminal Block
8
Control Panel
9
Water Mixing Valve
10
Recirculation Pump
11
Hot Water Connection
12
Condensate Trap
13
Recirculation Return Connection with Filter
14
Circuit Board
15
Cold Water Connection with Filter
16
Gas Connection
17
Water Control Valve
18
Main Flow Sensor
19
Air Pressure Switch
20
Main Power Switch
21
Flame Sensor
22
Gas Valve
23
AGM (Air Gas Mixer)
24
Fan Motor
25
Internal Air Intake Filter
26
Air Intake
27
Water Leak Detector
28
Recirculation Flow Sensor
2-2. Dimensions & Connections
28.7" [730mm] 4.0" [101mm]
11.5" [292mm]
4.6" [117mm]5.8" [148mm]
5.7" [146mm] 14.8" [376mm]
2.6" [65mm]
2.4" [62mm]
3.3" [84mm]
6.4" [163mm]9.0" [228mm]
3
4
5
6
8
7
9
10
1127 12 1328
14
15
16
17
18
19
22
21
20
23
24
25
26
2
1
A
C
D
I
E
H
F
G
B

8
Safety Precautions
Chapter3.–SafetyRequirements
WARNING
To avoid product damage, personal injury, or even possible death, carefully read, understand, and
follow all the instructions in the Installation and Owner’s Guide before installation, operation and
service the Water Heater.
Noritz cannot anticipate every circumstance that might involve a potential hazard. Therefore, all
possible incidents are not included in our warnings. Proper installation, operation, and service are
your responsibility.
You must make sure that the operation and settings of the Water Heater are safe for you and for
others.
This manual provides Safety Symbols. When the user fails to adhere to the following requirement, it will cause death, serious damages,
and a great property loss.
For safety symbols, ‘DANGER’, ‘WARNING’, ‘CAUTION’ are indicated and the denitions for these terms are as follow:
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury. This signal word is limited to the most extreme situations.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. It is also used to alert against unsafe practices and hazards involving only
property damage.
3-1. Safety Precautions
DANGER
WARNING
CAUTION

9
DANGER
Before Installation
Chapter3.–SafetyRequirements
Check the xing brackets and vent pipe yearly for damage or wear. Replace if necessary.
3-2. Before Installation
WARNING
Precautions on Vent Pipe Replacement
The vent system will almost certainly need to be replaced when this appliance is being installed.
Only use vent materials that are specied in this Installation Manual for use on this appliance. Refer
to the “Vent Pipe Installation” section for details. If PVC, CPVC, or Category IV listed pipe is already
installed, check for punctures, cracks, or blockages and consult with the vent pipe manufacturer
before reusing.
Improper venting may result in res, property damage or exposure to Carbon Monoxide.
Snow Precaution
If this product will be installed in an area where snow is known to accumulate, protect the vent
termination from blockage by snow drifts or damage from snow falling 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 180,000 Btu/h or 199,000 Btu/h.
Check the Power
The power supply required is 120VAC, at 60Hz.
Using the incorrect voltage may result in re or electric shock.
Do Not Use This Water Heater for Purposes Other Than Those Specied
Do not use for applications other than increasing the temperature of the water supply, as unexpected
accidents may occur as a result.
Check Water 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.
CAUTION

10
Choosing Installation Site
Chapter3.–SafetyRequirements
3-3. 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 oors of the structure. When such locations cannot be avoided,
it is required that a suitable drain pan, adequately drained, 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
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
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
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, recreational vehicle or on a boat.
The manufacturer does not recommend installing the water heater in an attic due to safety issues.
If you install the water heater in an attic:
• Make sure the unit will have enough combustion air and proper ventilation.
• Keep the area around the water heater clean. Dust may accumulate and reduce the performance of
the unit’s fan. This can result in incomplete combustion.
• Place the unit for easy access for service and maintenance.
• A drain pan, or other means of protection against water damage, is required to be installed under
the water heater in case of leaks.
Never draw combustion air from a bathroom, it may be damaged or a re may be
caused.
Consult with the customer concerning the location of installation.
Install the water heater in an area that allows for the proper clearances to
combustible and noncombustible construction. Consult the rating plate on the
appliance for proper clearances.
Do not install the water heater in a place where it may be threatened by falling
objects, such as under shelves.
The water heater must be installed in a place where supply and exhaust pipes can
CAUTION

11
Choosing Installation Site
Chapter3.–SafetyRequirements
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.
• 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.
• Install the water heater in an area that allows for the proper clearances to combustible and
non-combustible construction. Consult the rating plate on the appliance for proper clearances.
• Do not install the water heater in a place where it may be threatened by falling objects, such as
under shelves.
• The water heater must be installed in a place where supply and exhaust pipes can be installed as
directed.
• Do not install the water heater where the exhaust will blow on outer walls or material not resistant
to heat. Also consider the surrounding trees and animals. The heat and moisture from the water
heater may cause discoloration of walls and resinous materials, or corrosion of aluminum materials.
• Do not locate the vent termination directed towards a window or any other structure which has
glass or wired glass facing the termination.
• Avoid installation where the unit will be exposed to excessive winds.
• Avoid installation above gas ranges or stoves.
• Avoid installation between the kitchen fan and stove. If oily fumes or a
large amount of steam are present in the installation location, take
measures to prevent the fumes and steam from entering in the
equipment.
• Install in a location where the exhaust gas ow will not be 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 ue termination will have the
proper clearances according to the National Fuel Gas Code (ANSI
Z223.1-latest edition) or the Natural Gas and Propane Installation Code
(CSA B149.1).
CAUTION
be installed as directed.
Do not install the water heater where the exhaust will blow on outer walls or material not resistant to heat. Also
consider the surrounding trees and animals.
The heat and moisture from the water heater may cause discoloration of walls and resinous materials, or corrosion
of aluminum materials.

12
Installation Clearances
Chapter3.–SafetyRequirements
Cooking Equipment
<When the indoor air supply>
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.
Distance from combustibles
Maintain the following clearances from both combustible
and non-combustible materials.
3-5. 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 Natural Gas and Propane Installation Code (CSA B149.1-
latest edition.) for detailed requirements
Display Operation Description
5:EL High Elevation Select an elevation range from the following four options based on where the water
heater is installed.
0 ~ 2 0 ~ 1,999 ft (0 ~ 609 m), Default
2 ~ 5 2,000 ~ 4,999 ft (610 ~ 1,523 m)
5 ~ 8 5,000 ~ 7,999 ft (1,524 ~ 2,438 m)
8 ~ 10 8,000 ~ 10,000 ft (2,439 ~ 3,048 m)
3-4. High Elevation Installations
＊Please refer to page 35 for more detail setting method on control panel.
•This unit is only ANSI/CSA certied for installation up to 4500 ft. (1,350 m) above sea level.
•For installations at higher elevations, please refer to the directions below or contact Noritz America.
Note:
This water heater may be installed at elevation up to 10,000 ft for use with Natural Gas and Propane. The water heater must be set
for a specic altitude using the Installer Mode Setting described below.
Above 2,000 ft (610 m), the water heater will de-rate by 4% for each 1,000 ft (305 m) of altitude gain.
[ Installer Mode ]
Indoor Installation

13
Installation Clearances
Chapter3.–SafetyRequirements
Securing of space for repair/inspection
In order to facilitate inspection and repair it is recommended
to leave:
If possible, leave 8" (200mm) or more on either side of the
unit to facilitate inspection.
If possible, leave 24" (600mm) or more in front of the unit to
facilitate maintenance and service if necessary.
If possible, leave 3" (75mm) or more above and below the
vent pipe to facilitate inspection and repair if necessary
Surrounding the area of installation
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.
Required Clearances From Heater
Maintain the following clearance from both combustible
and non-combustible materials.
Surrounding the area of installation
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 not install
the unit in a location where the unit is out of reach, such
as the wall of the second oor.
Outdoor Installation

14
Installation Clearances
Chapter3.–SafetyRequirements
Description US Direct Vent
Installations 1
Canadian Direct Vent
Installations 2
A Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm)
B Clearance to window or door that may be opened 12 in (30 cm) 36 in (91 cm)
C Clearance to permanently closed window * *
DVertical clearance to ventilated soft located above the terminal within
a horizontal distance of 2 feet from the center line of the terminal * *
EClearance to unventilated soft * *
F Clearance to outside corner * *
G Clearance to inside corner * *
HClearance to each side of center line extended above meter/regulator
assembly *
3 ft (91 cm) within a
height 15 ft above the
meter/regulator assembly
I Clearance to service regulator vent outlet * 3 ft (91 cm)
JClearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance 12 in (30 cm) 36 in (91 cm)
K Clearance to a mechanical air supply inlet
3 ft (91 cm) above if
within 10 ft (3 m)
horizontally
6 ft (1.83 m)
LClearance above paved sidewalk or paved driveway located on public
property * 7 ft (2.13 m)
†
M Clearance under veranda, porch, deck, or balcony * 12 in (30 cm) ‡
Clearance Requirements from Vent Terminations to Building Openings
<When supplying combustion air from the outdoors (Direct Vent)>
1 In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
2 In accordance with the current CSA B149.1 Natural Gas and Propane Installation 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 oor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier. Clearance to opposite wall is 24 inches (60 cm).

15
1.Use the wall bracket to mark two locations where the anchor
bolts will be inserted.(Make sure that the wall bracket is level)
2. Drill two holes with a 15/32"(12mm) size bit and insert the two
anchor bolts into the holes with the threaded end out.
3. Place the wall bracket on the two anchor bolts.
4. Place washers and nuts on each anchor bolt and tighten.
Make sure that it is leveled and it can support the weight of
the Water Heater.
5. Lift up the Water Heater, rest the unit on the hooks provided
on the wall bracket that is already mounted on the wall.
6. Locate the lower mounting bracket on the bottom of the
Water Heater. The two screws and dry wall anchors will be
used to securer the bottom of the unit to the wall.
9. Place the Water Heater back on the wall. (same as step 5)
10. Screw in the two screws into the dry wall anchors.
Securing to the wall
Chapter4.–Installation
4-1. Securing to the wall
WARNING
CLEARANCES FOR SERVICE ACCESS
The water heater must be installed on a wall that can bear its weight.
The Water heater can be installed on any suitable internal wall (suitable sound proong may be required
when installing onto a stud partition wall).
Afx the screws into dry wall anchors.
Position the bracket securely to the wall.
7. Mark two holes. Then remove the Water Heater from the wall.
8. Drill two holes with a 17/64"(7mm) size bit.
Then insert the two dry wall anchors into the wall.

16
Chapter4.–Installation
General Requirements
• Under normal conditions, this appliance will not produce an exhaust ue temperature in excess of 149°F (65°C) and schedule 40
PVC pipe may be used as the vent material.
• Make sure the vent system is gas tight and will not leak.
• Support the vent pipe with hangers at regular intervals as specied by these instructions or the instructions of the vent manufacturer.
• Do not common vent with other manufacturer’s water heaters or appliances. See page 43 to common vent with a Quick Connect
System.
• The total vent length including horizontal & vertical vent runs should be no less than 3' (0.9m).
• Do not store hazardous or ammable substances near the vent termination and check that the termination is not blocked in any way.
Venting With PVC or CPVC
This appliance can be vented with non cellular core plastic pipe materials as specied in the below table.
Vent installations in Canada which utilize plastic vent systems must comply with ULC S636.
Item Material United States Canada
Exhaust Vent /Air Intake
Schedule 40 PVC ANSI/ASTM D1785
ULC S636 Certied
Materials Only
PVC-DWV ANSI/ASTM D2665
Schedule 40 CPVC ANSI/ASTM F441
Pipe Cement/Primer PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
Note: Do Not Use Cellular Foam Core Pipe
• Use only solid PVC or CPVC schedule 40 pipe. Cellular foam core piping is not allowed.
• In Canada, plastic vent systems must be certied to ULC S636. The components of the certied vent system must not be interchanged
with other vent systems or unlisted pipe/ttings.
• In Canada, specied primers and glues of the ULC S636 certied vent system must be from a single system manufacturer and not
intermixed with other system manufacturer’s vent system parts.
• PVC or CPVC pipe has been approved for use on this appliance with zero clearance to combustibles.
• Follow all general venting guidelines as outlined on this page.
• The pipe shall be installed so that the rst 3' (0.9m) of pipe from the appliance ue outlet is readily accessible for visual inspection.
• When preparing and assembling the pipe, follow instructions as provided by the pipe manufacturer. In general, the following
practices must be observed:
* Squarely cut all pieces of pipe.
* Remove all burrs and debris from joints and ttings.
* All joints must be properly cleaned, primed, and cemented. Use only cement and primer approved for use with the pipe
material as outlined in the above table.
• All piping must be fully supported. Use pipe hangers at a minimum of 3' (0.9m) intervals. Do not use the water heater to support
the vent piping.
• A vent screen must be installed on the vent terminations to prevent debris or animals from entering the piping.
Vent Pipe Installation
4-2. Vent Pipe Installation (Indoor Installation Only)

17
REDUCING VENT SIZE: TRANSITIONING FROM 3" TO 2"
VENT PIPE MUST ALWAYS TAKE PLACE IN A VERTICAL
POSITION TO PREVENT CONDENSATE BLOCKAGE.
3 inch pipe 2 inch pipe (A eld supplied PVC reducer bushing must be used.)
Chapter4.–Installation Vent Pipe Installation
Tightening
• You can select the size of vent pipe(2" or 3") according to the installation conditions.
• Push the pipe into the unit ue until it touches the bottom.
• Tighten the band clamps using a screwdriver.
• Finally, make sure that both pipes(exhaust & air intake) are securely xed.
Vent Termination
 VentScreenInstallation
  •Installventscreen(Only3"ventscreensareincludedasaccessories),seethebelowgureforappropriate
conguration.
  •Afterconnectingvent/airinletterminal,itisrequiredtoinstallscreenfortheterminaltopreventincomingof
debrisandanimals,whichmightcausedamagetotheunit.
(2"ventscreen(1/4"mesh)mustbepurchasedfor2"ventinginstallation)
AllowableSchedule40VentLength(PVC,CPVC)
*Theterminationelbowmustbeincludedinthetotalnumberofelbows.
Maximum Vent Length
The unit can be adjusted to accommodate longer vent runs; refer to the below table to nd the maximum vent
length based on the number of elbows.
3" vent screen (1/4" mesh)
Pipe diameter 3"(75mm) 2"(50mm)
No. of Elbows Max Equivalent Vent Length*
6 70
´
N/A
5 75
´
N/A
4 80
´
18
´
3 85
´
26
´
2 90
´
34
´
1 95
´
42
´
0 100
´
50
´
• 5 feet (1.5M) for each additional
3-inch 90-degree elbow
• 2.5 feet (0.75M) for each additional
3-inch 45-degree elbow
• 8 feet (2.4M) for each additional
2-inch 90-degree elbow
• 4 feet (1.2M) for each additional
2-inch 45-degree elbow
Reducer bushing
CAUTION

18
Vent Pipe Installation
Chapter4.–Installation
Horizontal Vent Termination- PVC/CPVC Materials Only
• As illustrated on the right, make sure to keep a distance of 3'
(0.9m) or wider between the intake and exhaust when installing
the vent piping.
* If 3' (0.9m) remote distance between Intake and Exhaust cannot
be ensured, the installation can be carried out only in the
installation method shown in page 20.
• The PVT-HL termination may be used in place of elbows as
the horizontal vent terminations. It is not necessary to use vent
screens
with the PVT-HL termination.
• Terminate at least 12" (300mm) above grade or above snow line.
• Terminate at least 7' (2.1m) above a public walkway, 6' (1.8m)
from the combustion air intake of any appliance, and 3' (0.9m)
from any other building opening, gas utility meter, service regula-
tor etc.
• Terminate at least 3' (0.9m) above any forced air inlet within 10'
(3m) , 1' (0.3m) below, 1' (0.3m) horizontally from or 1' (0.3m)
above any door, window, or gravity air inlet into any building per
National Fuel Gas Code ANSI Z223.1/NFPA 54.
• Slope the horizontal vent 1/4" upwards for every 12" (300mm)
toward the termination.
• Use a condensation drain if necessary.
• In the Commonwealth of Massachusetts a carbon monoxide
detector is required for all side wall horizontally vented gas fuel
equipment. Please refer to Technical Bulletin TB 010606 for full
installation instructions.
Vertical Vent Termination- PVC/CPVC Materials Only
• As illustrated on the right, make sure to keep a distance of 3'
(0.9m) or wider between the intake and exhaust when installing the
vent piping.
• Terminate at least 6' (1.8m) from the combustion air intake of any
appliance, and 3' (0.9m) from any other building opening, gas utility
meter, service regulator etc.
• Enclose exterior vent systems below the roof line to limit
condensation and protect against mechanical failure.
• When the vent penetrates a oor or ceiling and is not running in a
re rated shaft, a restop and support is required.
• When the vent termination is located not less than 8' (2.4m) from
a vertical wall or similar obstruction, terminate above the roof at
least 2' (0.6m), but not more than 6' (1.87m), in accordance with the
National Fuel Gas Code ANSI Z223.1/NFPA 54.
• Provide vertical support every 3' (0.9m) or as required by the vent
pipe manufacturer’s instructions.
• A short horizontal section is recommended to prevent debris from
falling into the water heater.
• When using a horizontal section, slope the horizontal vent 1/4"
upwards for every 12" (300mm) toward the
termination to drain condensate.
When choosing intake and exhaust terminations, you must use the same
type of elbow (i.e. both 90° elbows). This will help with proper combustion
by putting both terminations in the same pressure zone.
When choosing intake and exhaust terminations, you must
use the same type of elbow (i.e. both 90° elbows).
This will help with proper combustion by putting both
terminations in the same pressure zone.
Vent Pipe Installation (DV-Direct Vent)
Exhaust
Intake
**1' (0.3m) Minimum
Hanger
Straps
3" Min
Insert Vent Screen* in End of 90 Elbow
* Not supplied with water heater, order separately.
**1' (0.3m) Minimum recommended, but not required.
Slope vent Upwards
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
Exhaust
Intake
Slope vent Upwards
**1' (0.3m) Minimum
Hanger
Strap
Firestop
Support
Firestop/Support
Storm
Collar
Roof
Flashing
Insert Vent
Screen* in
End of 90 Elbow
Firestop
Roof
Flashing
Storm
Collar
12" over maximum
snow level
or 24", whichever
is greater.
3ft. Min.
12" over minimum
snow level or 24",
whichever is
greater.
* Not supplied with water heater, order separately.
**1' (0.3m) Minimum recommended, but not required.
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �

19
Vent Pipe Installation
Chapter4.–Installation
Concentric PVC/CPVC Termination
• The concentric termination may be shortened, but not lengthened from its original factory supplied length.
• 2" (50mm) & 3" (75mm) PVC or CPVC pipe may be used with the concentric termination. Reducers will be needed to connect 2" pipe.
Maintain the same vent pipe diameter from the water heater ue to the termination.
• Do not exceed the maximum vent lengths as specied in this section.
• There must be a 1" (25mm) to 4" (100mm) clearance between the outside wall and the air intake section of the termination as
illustrated on the left.
• Install a securing strap to prevent movement of the termination.
• Terminate at least 12" (300mm) above grade or above snow line.
• Terminate at least 7' (2.1m) above a public walkway, 6' (1.8m) from the combustion air intake of any appliance, and 3' (0.9m) from any
other building opening, gas utility meter, service regulator etc.
• Terminate at least 3' (0.9m) above any forced air inlet within 10' (3m), 1' (0.3m) below, 1' (0.3m) horizontally from or 1' (0.3m) above
any door, window, or gravity air inlet into any building per National Fuel Gas Code ANSI Z223.1/NFPA 54.
• Slope the horizontal vent 1/4” upwards for every 12" (300mm).
• Use a condensation drain if necessary.
Vent Pipe Installation (DV-Direct Vent)
Vertical
Horizontal
Slope vent Upwards
Hanger
Straps
Strap
1" (25mm) to
4" (100mm)
Insert Vent Screen* in
End of Termination
Exhaust
Intake
**1' (0.3m) Minimum
* Not supplied with water heater, order separately.
**1' (0.3m) Minimum recommended, but not required.
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
Intake
Exhaust
US 12 in (30cm)
Rain Cap (PRC-1)*
* Not supplied with water heater,
order separately.
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �

20
5.9" Exhaust
Intake
3" Min
2ft. Min
Interior View
Exterior View
Exhaust
Intake
5.9"
1ft. Min
Intake
Exhaust
1ft. Min
3" Min
Interior View Exterior View
ExhaustIntake
5.9"
Exhaust
Intake
1ft. Min
3" Min
Interior View Exterior View
Vent Pipe Installation
Chapter4.–Installation
• Intake and exhaust should face the same
direction. Intake and exhaust should stay within
the same pressure zone.
• Insert the vent screen. 90° elbow vertical set-
ting (downward).
• Ensure at least 3ft (0.9m) or more distance
between the near edge of the air intake pipe or
exhaust pipe to the inside corner of a wall.
• Ensure at least 2ft (0.6m) or more distance
between intake pipe and exhaust pipe. The
distance is measured at inside of pipe to inner
dimension.
• Intake and exhaust should face the same
direction. Intake and exhaust should stay within
the same pressure zone.
• Insert the vent screen. 90° elbow vertical set-
ting (downward).
• Ensure at least 3ft (0.9m) or more distance
between edge of air intake pipe or exhaust pipe
and corner wall.
• Upper side is exhaust, lower side is intake. The
reverse orientation is not allowed.
• Ensure at least 1ft (0.3m) or more distance be-
tween intake pipe and exhaust pipe.
The distance is measured at the outlets of intake
port (terminal) and exhaust port (terminal).
• Intake and exhaust should face the same
direction. Intake and exhaust should stay within
the same pressure zone.
• Insert the vent screen. 90° elbow vertical set-
ting (downward).
• Ensure at least 3ft (0.9m) or more distance
between edge of air intake pipe or exhaust pipe
and corner wall.
• The pipe farther from the wall is intake, the side
near the wall is exhaust. The reverse connection
is not allowed.
• Ensure at least 1ft (0.3m) or more distance
between intake pipe and exhaust pipe. The
distance is measured at inside of pipe to inner
dimension.
Horizontal Vent Termination- PVC/CPVC Materials Only
* When 3' (0.9m) remote distance between Intake and Exhaust cannot be ensured.
* Can not use Hood termination (PVT-HL)
Vent Pipe Installation (DV-Direct Vent)