Noritz NRCB199DV User manual

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.
Prohibited Disconnect
Power Ground Be sure to do
WARNING: If the information in this manual is not followed exactly, a re or explosion may result
causing property damage, personal injury or death.
NORITZ AMERICA
CORPORATION
Installation Manual
CONDENSING GAS COMBI BOILER
NRCB199DV (GHQ-C3201WX-FF US)
NRCB180DV (GHQ-C2801WX-FF US)
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.
DANGER
WARNING
CAUTION
SBB80UB-1
Rev. 07/17
Requests to Installers
• In order to use the Combi Boiler 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 Combi Boiler (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.
CAUTION
*SBB80UB*
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 54-
latest edition and/or the Natural Gas and Propane Installation
Code CSA B149.1 - latest edition.
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 specications of its products without notice.
CERTIFIED
R
Low NOx Approved by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
APMOR
LOW-LEAD
&T
TM
I

2
1.
Included Accessories
The following accessories are included with the unit.
Check for any missing items before starting installation.
Q’ty
ShapePart
Anchoring Screw 1
each
2
each
Part Shape Q’ty
7
Outdoor Temperature
Sensor
Wall Mounting
Bracket
1
2.
Optional Accessories
The accessories listed below are not
included with the units, but may be necessary
for installation.
Q’ty
ShapePartPart Shape Q’ty
Quick Connect Cord
(QC-2) 1
1
each
Isolation Valve Set
for DHW*
(includes pressure
relief valve)
Owner's Guide, Warranty,
Installation Manual
(this document)
Pressure Relief Valve
for Heating
(ASME Certied)
(3/4",30psi)
Anchoring Screw & Anchor
for Outdoor Temperature Sensor
Bird Screen for
2"(50mm) PVC
VT2-PVCS
Bird Screen for
3" (75mm) PVC
VT3-PVCS
2
2
PVC Concentric
Termination
2"(50mm) : PVC-2CT
3"(75mm) : PVC-3CT
1
Note: Additional vent pieces are available; consult the latest product catalogue for details.
3" (75mm)
Horizontal Hood
Termination
(PVT-HL)
2
1
1
each
Noritz Connect
Wireless Adapter
NWC-ADAPTER
(NAW-1 US)
1
Neutralizer
(NC-1)
(For 1 Combi Boiler)
* Isolation valves are necessary for ushing the Plate Heat Exchanger.
They allow for easy ushing of the system.
** Not approved for use in Canada.
1
1
1
Plastic Rain Cap**
(PRC-1)
2" SV Conversion Kit
(SV-CK-2)
• 90° Elbow - 2" Pipe
(With Inlet Screen)
• Installation Manual
(Check List)

3
3. Before Installation
Checkup
• Check the mounting brackets and vent pipe yearly for damage or wear. Replace if necessary.
DANGER
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.
WARNING
CAUTION
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 Btu/h/ 120,000Btu/h (DHW / Heating mode)
of NRCB199DV(GHQ-C3201WX-FF US).
Check that the gas supply line is sized for
180,000 Btu/h/ 100,000Btu/h (DHW / Heating mode)
of NRCB180DV(GHQ-C2801WX-FF US).
Check the Power
• The power supply required is 120VAC, at 60Hz.
Using the incorrect voltage may result in re or electric shock.
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.
e.g. NRCB199DV(GHQ-C3201WX-FF US)

4
4. Choosing Installation Site
• 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.
• 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 Combi Boiler in a
recreational vehicle or on a boat.
• The manufacturer does not recommend installing the Combi Boiler in an
attic due to safety issues.
If you install the Combi Boiler in an attic:
• Make sure the unit will have enough combustion air and proper ventilation.
• Keep the area around the Combi Boiler 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 Combi Boiler in case of leaks.
DANGER
WARNING
Prohibited
* 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.

5
• 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).
State of California: The Combi 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.
Be sure to do
Prohibited
Prohibited
CAUTION
For Venting Manufacturers Requirements, see website listed below:
Noritz N-Vent www.noritz.com
• The Combi Boiler is designed for indoor installation only.
Never install it outdoors or in a bathroom, it may be damaged or a re may be caused.
• Install the Combi Boiler 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 Combi Boiler near staircases or emergency exits.
• Install the Combi Boiler 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 Combi Boiler in a place where it may be threatened by falling objects, such as
under shelves.
• The Combi Boiler must be installed in a place where supply and exhaust pipes can be installed as
directed.
• Do not install the Combi 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 Combi Boiler 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.

6
5. Installation Clearances
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.
WARNING
Item
Distance from combustibles
• Maintain the following clearances
from both combustible and
non-combustible materials.
Check Illustration
In order to facilitate inspection and repair it
is recommended to leave:
•
8" (200mm) or more on either side of the unit.
• 24" (600mm) or more in front of the unit.
• 3" (75mm) or more above and below the
vent pipe.
Securing of space for
repair/inspection
24" (600mm)
or more
Distance from
the side
12" (300mm)
or more
3" (75mm)
or more
4" (100mm)
or more
3" (75mm) or more
3" (75mm) or more
8" (200mm)
or more
8" (200mm)
or more
<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
non-combustible material of a width
greater than the Combi Boiler.
Exhaust hood
Range
Dividing plate Combi
Boiler
Cooking Equipment

7
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 supplie
r.

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)
6 in (15 cm) for appliances
≤ 10,000 Btuh (3kW), 9 in
(23 cm) for appliances > 10,000
Btuh (3kW) and ≤ 50,000 Btuh
(15 kW), 12 in (30 cm) for
appliances > 50,000 Btuh (15 kW)
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)
6 in (15 cm) for appliances
≤ 10,000 Btuh (3kW), 9 in
(23 cm) for appliances > 10,000
Btuh (3kW) and ≤ 50,000 Btuh
(15 kW), 12 in (30 cm) for
appliances > 50,000 Btuh (15 kW)
*
*
*
*
**
*
*
*
3 ft (91 cm) above if within
10 ft (3 m) horizontally
*
12 in (30 cm)
US Direct Vent Installations 2
Canadian Direct Vent Installations 1
Vent Terminal
D
E
B
B
F
B
A
G
H
I
CB
M
K
J
B
B
L
Air Supply Inlet
Area Where Terminal
is Not Permitted
A
Clearance Requirements from Vent Terminations to Building Openings
<When supplying combustion air from the outdoors (Direct Vent)>
* 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 the Natural Gas and Propane Installation Code
CSA B149.1.

8
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 supplie
r.

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. 13 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.
Clearance Requirements from Vent Terminations to Building Openings
<Other than Direct Vent>

9
6. Installation
Mounting the Combi Boiler 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 damaged and may become highly dangerous.
• Install the unit on a vertical wall and ensure that it is level.
• 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.
CAUTION
Be sure to do
2. Hang the Combi Boiler on the Wall Mounting Bracket.
Mounting Bracket
(Upper)
Hang
A
nchoring Screw
Wall Mounting
Bracket 1. Drill holes for the Wall Mounting Bracket.
Afx the Wall Mounting Bracket securely to the wall by
5 screws.
Ensure that it is leveled, and it can support the weight
of the Combi Boiler.

10
* Do not change any other dip switches.
High Elevation Adjustment #6#5
Dip Switches
2,001 - 4,000 ft (611 - 1,220m)
0 - 2,000 ft (0 - 610m)
ON=OFF=
4,001 - 7,000 ft (1,221 - 2,135m)
7,001 - 10,000 ft (2,136 - 3,050m)
Filling the Condensate Container with Water
Elevation Adjustment above 2,000ft
DANGER
Prior to initial start up, make sure that you ll the condensate container with water.
This is to prevent dangerous exhaust gases from entering the building.
Failure to ll the condensate container could result in severe personal injury or death.
• Adjust the dip switches as illustrated in the table below if this Combi Boiler is installed at an altitude of
2000 ft. (610m) or higher.
• Disconnect power to the Combi Boiler before changing the dip switches.
Failure to perform this step will result in a "73" code displayed on the Operation Panel and a cease in operation.
If this occurs, disconnect, then reconnect power to the Combi Boiler to reset the system.
Note: Please refer to page 19 for the location of the dip switch bank.
3. Afx the Mounting Bracket (Lower)
to the wall by 2 screws.
A
nchoring Screw
Mounting Bracket
(Lower)
Please follow one of the procedures described below to ensure that the condensate container is lled with water.
1) Fill the condensate container by pouring
approx. 10 oz.(280ml) of water into the exhaust accessory
on the top of the appliance as illustrated below.
Or, if the vent pipe has already been installed:
2) After installing the drain pipe, make sure that the area around the appliance is well ventilated; open a
window or a door if necessary.
Then, operate the unit and verify that condensate is coming out of the drain pipe.
(During normal use of the Combi Boiler, condensate will begin to discharge from the drain pipe within
15 minutes of use. However, depending on the season and/or installation site conditions, it may take longer.
10 oz.
280ml
Intake
Exhaust
The condensate container can be lled before connecting the vent pipe.
Filling the condensate container before vent pipe installation.

11
Maximum Vent Lengths
• This appliance has been designed to be vented
with either 2" (50mm) or 3" (75mm) PVC, CPVC
or PP.
Do not exceed the following maximum vent lengths:
7. Venting the Combi Boiler
(Indoor Installation Only)
WARNING
Be sure to do
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 the Natural Gas and
Propane Installation Code CSA B149.1 – latest edition.
• This is a Category IV appliance. Only vent
materials approved for use with Category IV
appliances should be used.
• Under normal conditions, this appliance will
not produce an exhaust flue temperature in
excess of 149°F (65°C) and schedule 40 PVC
pipe may be used as the vent material. If the
Combi Boiler set temperature is 160°F (70°C)
or higher, use schedule 40/80 CPVC or PP.
Refer to page 13 for additional requirements.
• 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 or connect more than
one appliance to this venting 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.
• 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 snow is expected to accumulate, take care
the end of the pipe is not covered with snow
or hit by falling lumps of snow.
General Requirements
Clearances
PVC,CPVC or PP has been approved for use on
this appliance with zero clearance to combusti bles.
No. of Elbows Max. Straight Vent Length*
8 N/A 60' (18.0m)
7 N/A 63' (18.9m)
6 12' ( 3.6m) 69' (20.7m)
5 18' ( 5.4m) 75' (22.5m)
4 27' ( 8.1m) 78' (23.4m)
3 36' (10.8m) 84' (25.2m)
2 42' (12.6m) 90' (27.0m)
1 51' (15.3m) 96' (28.8m)
Pipe diameter 2" (50mm) 3" (75mm)
Indoor Installation
* Not including the termination
Refer to page 17 for max. vent lengths
When using PVC Concentric Termination.
1. Continue to insert the Vent Pipe until it reaches to the
base of the unit Exhaust and Intake Flue.
(The Vent Pipe will be inserted approximately 2.3"(60mm).)
2. Secure the Vent Pipe by tightening the band using a
screwdriver
(The tightening torque shall be between 16 and 20 in lb.)
How to tighten the vent pipe
Exhaust and
Intake Flue
Vent Pipe
Screwdriver
-Flat head
-Box wrench(5/16")

12
Maximum Vent Length Adjustment Dip Switches
Number of
pieces**
Number of
pieces**
Short length using 3" (75mm) pipe
Short length using 2" (50mm)pipe
Long length using 2" (50mm)pipe
Long length using 3" (75mm) pipe
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
Vent length condition
࠙
Dip Switch Adjustmentࠚ
Dip Switches
1
#7 #8
ON=OFF=
2
3
4
2” Pipe 3” Pipe
* Not including the termination.
* Not including the termination.
• Do not change any other dip switches.
• Please refer to page 19 for the location of the dip switch bank.
[Vent length example]
Using 2"(50mm) pipe, Vent length = 42 ft. (12.8m) and Two 90° elbows
→Set at " 2 long length using 2" (50mm) pipe" condition.
3 0.9 1
6 1.8 2
9 2.7 3
12 3.6 4
15 4.5 5
18 5.4 6
21 6.3 7
24 7.2 8
27 8.1 9
30 9.0 10
33 9.9 11
36 10.8 12
39 11.7 13
42 12.6 14
45 13.5 15
48 14.4 16
51 15.3 17
54 16.2 18
57 17.1 19
60 18.0 20
6
Vent length* Elbows
ft m0 45123
30.9 1
61.8 2
92.7 3
12 3.64
15 4.55
18 5.46
21 6.37
24 7.28
27 8.19
30 9.010
33 9.911
36 10.8 12
39 11.7 13
42 12.614
45 13.515
48 14.416
51 15.317
54 16.218
57 17.119
60 18.020
63 18.921
66 19.822
69 20.723
72 21.624
75 22.525
78 23.426
81 24.327
84 25.228
87 26.129
90 27.030
93 27.931
96 28.832
99 29.733
100 30.034
Vent length* Elbows
ft m0 5
678
1234
1
2
3
4
2
<Maximum Vent Length Congurations>
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. Adjust the dip switches according to the vent
condition noted in the tables below.
Note: By default, the unit has been set to the " 1 short length using 2" (50mm) pipe" condition. When adjusting
the dip switches for longer vent runs, the BTUH input of the appliance will be reduced by up to 9%.
• Disconnect power to the Combi Boiler before changing the dip switches. Failure to perform
this step will result in a "73" code displayed on the Operation Panel and a cease in operation .
If this occurs, disconnect, then reconnect power to the Combi Boiler to reset the system.
The power must be unplugged when adjusting the dip switches to switch
the airow amount.

13
WARNING
CARBON MONOXIDE POISONING
Failure to properly seal the vent system could
cause flue products to enter the living space.
Item Material United States Canada
Approved Vent Manufacture
Centrotherm - lnnoFlue®PP
Single Wall Pipe (2”/3”) : ISVL02xx(UV) / 03xx(UV), ISEP02xx / 03xx,
ISIA0203
Elbow : ISELL0287(UV) / 0387(UV), ISELL0245 / 0345
Termination** : ISELL0287UV / 0387UV, ISTT0220 / 0320
Bird Screen : IASPP02/03
Parts#
Vent Material
2" (50mm)/3"(50mm) PVC or CPVC
Centrotherm - 2"(50mm)/3"(75mm) PP
Bird Screen Parts #
VT2-PVCS / VT3-PVCS
IASPP02 / IASPP03
Exhaust Vent/Air Intake
Schedule 40 PVC ANSI/ASTM D1785
PVC-DW
Polypropylene*
V ANSI/ASTM D2665
Schedule 40 CPVC ANSI/ASTM F441
Pipe Cement/Primer PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
PVC / CPVC / PP
Installation Instructions
• Use only solid PVC / CPVC (schedule 40) or PP pipe. Cellular foam core piping is not allowed.
• Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
•
•
In Canada, plastic vent systems must be certified to ULC S636. The components of the certified
vent system must not be interchanged with other vent systems or unlisted pipe/fittings.
• In Canada, specified primers and glues of the ULC S636 certified vent system must be from a
single system manufacturer and not intermixed with other system manufacturer’s vent system parts.
• Follow all general venting guidelines as outlined on this page.
• The pipe shall be installed so that the first 3’ (0.9m) of pipe from the appliance flue 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:
o Squarely cut all pieces of pipe.
o Remove all burs and debris from joints and fittings.
o 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.
•
•
PVC, CPVC or PP pipe has been approved for use on this appliance with zero clearance to combustibles.
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.
2" or 3" schedule 80 pipe may also be used on this appliance, however the BTUH input of the
appliance will be reduced by up to 9%.
Venting With PVC, CPVC or PP
This appliance can be vented with non cellular core plastic pipe materials as specified in the below table.
Vent installations in Canada which utilize plastic vent systems must comply with ULC S636.
* Polypropylene : Only listed manufacture specified vent parts may be used for this appliance.
Refer to the manufacture's literature for detailed information.
** Applicable vent termination are "87 degree elbow" or "Tee type".
Concentric vent termination of polypropylene are prohibited.
•
•A
bird screen must be installed on the vent terminations to prevent debris or animals from entering the
piping. These screens are not supplied with the water heater and must be purchased separately.
When attaching the piping to the water heater, use the appropriate primer and cement to ensure a proper seal.
U
CSA B137.3
CSA B181.2
CSA B137.3
Centrotherm-lnnoFule®
(certified ULC 636S)
LC S636 Certified
Materials Only
Note: Use of cellular core PVC (ASTM F891), cellular core CPVC, or
Radel (polyphenylsulfone) in non-metallic venting system is prohibited.
R

14
Vertical Vent Termination - PVC/CPVC/PP Material
•
•
•
•
•
•
•
•
•
Horizontal Vent Termination - PVC/CPVC Material Only (when using PVT-HL termination)
Hanger
Straps
**1' mini
* Not supplied with water heater,
order separately.
mum recommended,
but not required.
3 ft. Min.
Firestop Firestop
Firestop/Support
Roof
Flashing
Roof
Flashing
Hanger
Strap
**1'
Minimum
**1'
Minimum
Support
Slope the Vents Upward
Slope vent
Upwards
Intake
Exhaust
12" over maximum
snow level
12" over maximum
snow level
Insert Bird
Screen* in
End of 90 Elbow
Storm
Collar
Storm
Collar
• 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) distance between Intake and Exhaust cannot be ensured, the installation can be carried out only
in the installation method shown in page 15.
• Terminate at least 12" (300mm) above grade or above snow line.
• 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.
As illustrated on the left, 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 3’ (0.9m) from the combustion air
intake of any appliance and any other building opening.
Enclose exterior vent systems below the roof line to limit
condensation and protect against mechanical failure.
When the vent penetrates a floor or ceiling and is not
running in a fire rated shaft, a firestop and support is
required.
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 or Natural Gas
and Propane Installation Code CSA B149.1.
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 Combi Boiler.
When using a horizontal section, slope the horizontal
vent 1/4” upwards for every 12” (300mm) toward the
termination to drain condensate.
When using 3" (75mm) pipe, it will be necessary to use
2" (50mm) ×3"(75mm) increaser couplings and a short
section 2" (50mm) pipe to connect the Exhaust and Intake
Flue of the Combi Boiler. Use maximum6" (150mm) section
of pipe to make the connection between the increaser
couplings and the Exhaust and Intake Flue of the Combi Boiler.
Insert Bird
Screen* in
End of 90 Elbow
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.
Insert Bird Screen*
in End of 90 Elbow
3” Min.
Exhaust
2" (50mm)
Intake
2" (50mm)
* Not supplied with Combi
Boiler, order separately.
** 1' Minimum recommended,
but not required.
Intake
3" (75mm)
Interior Wall
Ceiling
Exhaust
3" (75mm) Slope the Vents
Upward
Hanger Straps
* 1' Minimum recommended, but not required.
** 3" (75mm) pipe and 2"×3" Increaser couplings
require when using PVT-HL. Increaser couplings
must be used just behind the Combi Boiler.
Not supplied with Combi Boiler, order separately.
* 1' Minimum
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.
Ӎ3ft. Min
Intake
Exhaust
Exterior Wall
PVT-HL
3"(75mm)
12"(300mm)
above grade or
above snow line
**2"×3" Increaser
coupling
The PVC/CPVC elbow may be used
in place of PVT-HL as the horizontal vent termination.
2"×3" Increaser couplings require
when using 3" (75mm) pipe.
2" pipe
3" pipe
2"×3" Increaser
coupling
Vent Pipe Installation

15
Vent Pipe Installation
Alternate Horizontal Vent Termination- PVC/CPVC/PP Material
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.
•
Upper side is exhaust, lower side is intake.
The reverse orientation is not allowed.
Ensure at least 1ft (0.3m) or more distance
between intake pipe and exhaust pipe.
The distance is measured at the outlets of
intake port (terminal) and exhaust port (terminal).
•
•
The side distant from wall is intake, the side
near the wall is exhaust.
The reverse orientation 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.
•
•
•
WARNING
If the distance between the air inlet and exhaust vent terminations is too short, the Combi Boiler
will draw in the exhaust gases through the intake. There is a risk of inadequate combustion air
for the Combi Boiler, increasing Carbon Monoxide (CO) emissions and noise due to vibration.
•Termination elbows must be oriented vertically, pointing directly downward. Attempts to prevent
exhaust air from entering the air inlet by angling termination elbows in directions other than
directly downward will increase the risk of freezing.
•Reversing the air intake and exhaust pipes is not allowed.
Carbon Monoxide (CO) emissions and noise due to vibration will increase.
* When 3’
(0.9m) distance between Intake and Exhaust cannot be ensured.
* Can not use Hood termination (PVT
-HL)
* Insert the bird screen. 90° elbow vertical setting (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.
* Intake and exhaust should face the same direction. Intake and exhaust should keep the same pressure zone
Ӎ3" Min
(between outside
wall and termination)
Ӎ3" Min
(between outside
wall and termination)
(between outside
wall and termination)
Ӎ3" Min
5.1" Exhaust Intake
Ӎ2ft. Min
Interior View Exterior View
Interior View Exterior View
Ӎ1ft. Min
Exhaust
Intake
Interior View Exterior View
5.1"
Exhaust
Intake
Ӎ1ft. Min
5.1"

16
Horizontal
Hanger
Straps
Strap
Slope the Vents
Upward
Intake
2" (50mm)
or
3" (75mm)
Exhaust
**1 '
Minimum
2" (50mm)
or
3" (75mm)
1" (25mm) to
2" (50mm)
Wall penetration thickness between
2” to 24”(PVC-2CT), 28”(PVC-3CT).
Insert Bird Screen***
in End of Termination
*** Not supplied with Combi Boiler.
It is included in PVC Concentric Termination.
PVC-2CT
or
PVC-3CT*
** 1' Minimum recommended,
but not required.
* 3" (75mm) pipe and 2"×3" Increaser couplings
require when using PVC-3CT.
Increaser couplings must be used just behind
the Combi Boiler.
2" pipe
3" pipe
2"×3" Increaser
coupling
e.g.) PVC-2CT installation
•
•
•
•
•
•
•
•
•
•
•
The concentric termination may be shortened, but not lengthened from its original factory supplied length.
2"(50mm) or 3" (75mm) PVC or CPVC pipe may be used with the concentric termination.
Maintain the same vent pipe diameter from the Combi Boiler flue to the termination.
Do not exceed the maximum vent lengths as shown on page 17.
When using 3" (75mm) pipe, it will be necessary to use 2"(50mm)×3" (75mm) increaser couplings and a
short section 2" (50mm) pipe to connect the Exhaust and Intake Flue of the Combi Boiler. Use maximum
6" (150mm) section of pipe to make the connection between the increaser couplings and the Exhaust and
Intake Flue of the Combi Boiler.
There must be a 1" (25mm) to 2" (50mm) clearance between the outside wall and the air intake section
of the termination as illustrated below.
Install a securing strap to prevent movement of the termination.
Terminate at least 12" (300mm) above grade or above snow line.
For vertical installation, terminate at least 3’ (0.9m) from the combustion air intake of any appliance and
any other building opening.
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
Continue to next page
PVC Concentric Termination- PVC/CPVC Material Only

17
Vertical
12" (30cm)
Min 12" (30cm) -
Max 15" (38cm)
(Recommend)
Min 12" (30cm) -
Max 15" (38cm)
(Recommend)
Intake
2" (50mm)
or
3" (75mm)
Exhaust
2" (50mm)
or
3" (75mm)
Plastic Rain Cap*
(PRC-1)
*Not supplied with Combi
Boiler, order separately.
Increaser coupling**
**Not supplied with Combi Boiler,
order separately.
PVC-2CT
or
PVC-3CT***
*** 3" (75mm) pipe and 2"×3"Increaser couplings
require when using PVC-3CT.
Increaser couplings need to be used just prior
to PVC-3CT.
2" pipe
3" pipe
3" pipe
2"×3"Increaser
coupling
e.g.) PVC-2CT installation
＜Maximum Vent length when using PVC-2CT or PVC-3CT＞
Number of
pieces**
Number of
pieces**
Short length using 3" (75mm) pipe
Short length using 2" (50mm)pipe
Long length using 2" (50mm)pipe
Long length using 3" (75mm) pipe
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
Vent length condition
࠙Dip Switch Adjustmentࠚ
Dip Switches
1
#7 #8
ON= OFF=
2
3
4
2” Pipe 3” Pipe
* Not including the termination.
* Not including the termination.
3 0.9 1
6 1.8 2
9 2.7 3
12 3.6 4
15 4.5 5
18 5.4 6
21 6.3 7
24 7.2 8
27 8.1 9
30 9.0 10
33 9.9 11
36 10.8 12
39 11.7 13
42 12.6 14
45 13.5 15
48 14.4 16
51 15.3 17
54 16.2 18
57 17.1 19
60 18.0 20
6
Vent length* Elbows
ft m0 45123
30.9 1
61.8 2
92.7 3
12 3.64
15 4.55
18 5.46
21 6.37
24 7.28
27 8.19
30 9.010
33 9.911
36 10.8 12
39 11.7 13
42 12.614
45 13.515
48 14.416
51 15.317
54 16.218
57 17.119
60 18.020
63 18.921
66 19.822
69 20.723
72 21.624
75 22.525
78 23.426
81 24.327
84 25.228
87 26.129
90 27.030
93 27.931
96 28.832
99 29.733
100 30.034
Vent length* Elbows
ft m0 56781234
1
2
1
3
4
3" (75mm) pipe and 2"×3" Increaser
coupling requires when using PRC-1.
PRC-1
3" (75mm) pipe
2" (50mm) pipe
2"×3" Increaser coupling

18
V
ertical Vent Termination
Horizontal Vent Termination
•
•
•
•
•
•
•
•
•
•
•
•
A tee, the PVT-HL termination may be used for the vent
termination. It is not necessary to use bird screens with
the PVT-HL termination.
Terminate at least 12" (300mm) above grade or above
snow line.
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.
Terminate at least 3’ (0.9m) from the combustion air intake
of any appliance andany other building opening.
Enclose exterior vent systems below the roof line to limit
condensation and protect against mechanical failure.
When the vent penetrates a floor or ceiling and is not
running in a fire rated shaft, a firestop and support is
required.
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 or Natural Gas and
Propane Installation Code CSA B149.1.
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 Combi Boiler.
When using a horizontal section, slope the horizontal
vent 1/4” upwards for every 12” (300mm) toward the
termination to drain condensate.
Hanger
Straps
Slope the Vents
Upward Insert Bird Screen* in
End of Termination
* Not supplied with
Combi Boiler,
order separately.
ۺ3". Min.
** 1' Minimum
** 1' Minimum recommended,
but not required.
Intake
Exhaust
2" (50mm)
or
3" (75mm)
SV Conversion Kit
Accessory
(SV-CK-2)
Inlet Screen
Slope the Vents
Upward
**1'Minimum
Hanger
Straps
Firestop
Support
Firestop / Support
Storm
Collar Roof
Flashing
12" over maximum
snow level
Insert Bird Screen* in
End of 90° Elbow
* Not supplied with Combi Boiler,
order separately.
** 1' Minimum recommended,
but not required.
Intake
SV Conversion Kit
Accessory
(SV-CK-2)
Inlet Screen
Exhaust
2" (50mm)
or
3" (75mm)
Vent Pipe Installation (When supplying combustion air from the indoors (SV, non-direct vent))
* Dip switch #3 is turned on.
• Disconnect power and turn ON dip switch #3 if combustion air will be supplied from the
indoors as illustrated to the right. Refer to page 19 for the location of the dip switch bank.
• SV Conversion kit SV-CK-2 is required for the air intake.
Failure to perform the above 2 steps could result in a re or explosion causing
property damage, personal injury or death.
Refer to the instructions provided with the conversion kit for additional details.
* Noritz recommends to install a Carbon Monoxide Alarm in installation site of
the unit when supplying combustion air from the indoors.
WARNING
When installing this Combi Boiler in an area with a large amount of lint such as a commercial Laundromat,
direct-vent ("-DV") system must be used. The "-SV" conguration (using an SV conversion kit) is prohibited.
When installing this Combi Boiler in a mobile home, all combustion must be drawn directly from the outdoors.
The "-SV" conguration (using SV conversion kit) is prohibited.
DANGER

19
• Provide two permanent openings to allow circulation
of combustion air.
• A minimum free area of each openings
Installation Unit BTUH
Indoor make up
air is provided
Outdoor make up air is provided
Direct or
Vertical ducts
Horizontal ducts
NRCB199DV
(GHQ-C3201WX-FF US)
199.9 kbtuh
200 in2
20" (W) x 10" (H)
50 in2
10" (W) x 5" (H)
100 in2
20" (W) x 5" (H)
NRCB180DV
(GHQ-C2801WX-FF US)
180 kbtuh
180 in2
20" (W) x 9" (H)
45 in2
10" (W) x 4 1/2" (H)
90 in2
20" (W) x 4 1/2" (H)
Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1-
latest edition and in Canada, in accordance with the Natural Gas and Propane Installation
Code CSA B149.1-latest edition.
Combustion Air
Openings supplying indoor air
H
H
W
W
Provide adequate combustion air so as to not create negative pressure within the building.
• If the unit is installed in a mechanical closet, a minimum
of permanent clearance of 4" or more in front of the unit
is required. A 24" or more clearance is recommended in
order to facilitate maintenance and repair.
• If combustion air will be provided through a duct, size
the duct to provide as below.
NRCB199DV (GHQ-C3201WX-FF US) :
70 cubic feet of fresh air per minute
NRCB180DV (GHQ-C2801WX-FF US) :
63 cubic feet of fresh air per minute
• If the unit is installed in a mobile home, outdoor air
must be supplied. The usage of the "-SV" conversion
kit is prohibited.
● How to change the dip switches*
*The dip switch bank is placed on the circuit board.
1. Disconnect electrical power to the Combi Boiler before changing the dip switches**.
2. Open the front cover of the Combi Boiler (4 screws).
3. Adjust the dip switches as illustrated below.
4. Close the front cover of the Combi Boiler (4 screws).
5. Reconnect the electrical power to the Combi Boiler.
**Failure to perform this step will result
a "73" code displayed on the Operation
Panel and a cease in operation.
If this occurs, disconnect, then
reconnect electrical power to the
Combi Boiler to reset the system.
The location of Dip Switch Bank
1 2 3 4 5 6 7 8
OFF
ON

20
Follow the instructions from the gas supplier.
8. Gas Piping
Gas Type
The gas type indicated on the Combi Boiler rating plate (NG or LP) must match the type of gas being
supplied to the Combi Boiler.
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 Combi Boiler 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.
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 Combi Boiler, 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.
CAUTION
Regulators
Ensure that all gas regulators used are operating properly and providing gas pressures within the specied
range of the Combi Boiler being installed. Excess gas inlet pressure may cause serious accidents.
CAUTION
Pressure
Check the gas supply pressure immediately upstream at a location provided by the gas company. Sup-
plied gas pressure must be within the limits shown in the specications section with all gas appliances oper-
ating. The inlet gas pressure must be within the range specied. This is for the purposes of input adjust-
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 Switch" on the circuit board. Please call Noritz for details.
WARNING
MODE
MINMAX
Maximum Switch
Circuit Board
Operation Panel