Installation Manual - The Furnace Outlet

Installation Manual
NORITZ AMERICA
CORPORATION
CONDENSING TANKLESS GAS WATER HEATER
NRC1111-OD (Outdoor Installation)
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings, they are critical to your safety.
DANGER
WARNING
CAUTION
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.
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Disconnect
Power
Prohibited
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 fill in all of the required
items on the warranty and to hand the warranty to the customer along with the Owner's Guide.
CERTIFIED
R
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 CSA B149.1,
Natural Gas and Propane Installation Code (NSCNGPIC).
When applicable, installation must conform with the Manufactured Home
Low NOx
Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian
Approved by Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
SCAQMD
Noritz America reserves the right to discontinue, or change at any time, the
14 ng/J or 20 ppm designs and/or specifications of its products without notice.
(Natural Gas Only)
SBA8724
Rev. 4/13
*SBA8724*
1. Included Accessories
Q’ty
Part
Cross Recessed
Head Screw
3
Owner's Guide, Warranty,
Installation Manual
(this document)
1
each
Remote Controller
(See p. 19)
1
Remote Controller
Cord (6ft (2m))
1
Part
Shape
2. Optional Accessories
Part
Remote Controller
Cord (26ft (8m))
Isolation Valves
Shape
Part
1
Quick Connect Cord
(QC-2)
(includes pressure
relief valve)
Recess Box
(RB-900-1)
1
1
Shape
Q’ty
The accessories listed below are not
included with the units, but may be necessary
for installation.
Q’ty
1
each
Remote Controller
(RC-9018M)
2
The following accessories are included with the unit.
Check for any missing items before starting installation.
Shape
Q’ty
1
Remote Controller
Outdoor
Junction Box
(RC-7651M only)
Pipe Cover
(PC-3S)
Neutralizer
(NC-1)
1
1
1
3. Quick Connect Multi System Installation
• The Quick Connect Multi System allows the installation of two units together utilizing only the Quick
Connect Cord.
The Quick Connect Cord is 6 ft.(2m) long. Install the units 2-18" (50 - 457mm) apart from each
other to ensure the cord will be able to reach between the units. (See Typical Plumbing diagram).
(If the distance between the two units is too great, not only will the cord not be able to reach,
but the water temperature may also become unstable because of the difference in pipe length
between the two units).
System Diagram
Quick Connect
Cord
* When connecting two units, use only a
single remote controller.
Cord
Connector
Cord
Connector
Note: Connect the remote
controller to only one
of the units.
Terminal Block
Remote Controller
Remote Controller Cord
G
Gas Supply Piping
Cold Water Supply
Hot Water
Typical Plumbing
Distance at center: 20.3 - 36.3 in. (515 - 922mm)
Distance on sides
2 - 18 in. (50 - 457mm)
Union
Union
Quick Connect
cord
Pressure
Make this distance as short as possible. Relief
* The hot water temperature will
Valve
become unstable as the pipe
Shutoff
length increases.
Valve
Union
Size the piping to allow for the
maximum flow rates of the units.
Gas Valve
Shutoff Valve
Hot Water
Cold Water
Shutoff Valve
Leave enough clearance around the plumbing to
apply insulation. It will be necessary to add
bends to the piping to ensure that this clearance
is available.
The backflow preventer is
put up before it diverges.
• Insulate the hot water piping to prevent heat loss. Insulate and apply heating materials to the
cold water supply piping to prevent heat loss and freezing of pipes when exposed to excessively
cold temperatures.
3
4. Before Installation
WARNING
Check the Gas
• Check that the rating plate indicates the
correct type of gas.
• Check that the gas supply line is sized for
199,900 Btuh.
Check the Power
• The power supply required is 120VAC, at 60Hz.
May result in fire or electric shock.
Use Extreme Caution if Using With a Solar Pre-Heater
• Using this unit with a solar pre-heater can lead to unpredictable output temperatures and
possibly scalding. If absolutely necessary, use mixing valves to ensure output temperatures do
not get to scalding levels. Do not use a solar pre-heater with the quick-connect multi-system.
CAUTION
Do Not Use Equipment for Purposes Other Than Those Specified
• 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.
5. 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 floors of the structure. When such locations
cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict combustion air flow.
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 fire
hazard.
4
Indoor
WARNING
• Avoid places where fires are common, such as those where gasoline,
benzene and adhesives are handled, or places in which corrosive gases
(ammonia, chlorine, sulfur, ethylene compounds, acids) are present.
Using the incorrect voltage may result in fire or cracking.
Prohibited
• Avoid installation in places where 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
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.
• 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.
Prohibited
• Install in a location where the exhaust gas flow will not be affected by
fans or range hoods.
• Take care that noise and exhaust gas will not affect neighbors.
Avoid installation on common walls as the unit will make some
operational noises while it is running.
• 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.
5
6. Installation Clearances
WARNING
Before installing, check for the following:
Install in accordance with relevant building and mechanical codes, as well as any local, state or
national regulations, or in the absence of local and state codes, to the National Fuel Gas Code
ANSI Z223.1/NFPA 54 – latest edition. In Canada, see NSCNGPIC for detailed requirements.
Check
Illustration
combustible
* ( ) indicates the distance when installing a heat
insulating board (incombustible material other than
metal, with thickness of 0.1" (2.5mm) or more) or "section
of building effectively finished with incombustible
material."
Note, however, that combustion failure may occur to
the unit as exhaust gas reflects from the wall. Provide
clearance of 24" (600mm) or more in the front of the
unit to facilitate inspection and repair.
24" (600mm)
(12" (300mm))
or more
0.4" (10mm)
or more
combustible
36" (900mm)
or more
combustible
Required Clearances From Heater
• Maintain the following clearance from both combustible
and non-combustible materials.
combustible
Item
6" (150mm)
or more
combustible
Surrounding the area of installation
6" (150mm)
or more
6
47" (1,190mm) or more
• 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 floor.
• 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 floor where the unit
is out of reach.
about 84"
(2,130mm)
Handrail
common side
corridor
24" (600mm)
or more
Handrail
balcony, etc.
Clearance Requirements from Vent Terminations to Building Openings
* All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code,
ANSI Z223.1 and in Canada, in accordance with NSCNGPIC.
Vent Terminal
Area Where Terminal
is Not Permitted
Air Supply Inlet
Clearance
A=
Above grade, veranda, porch, deck,or balcony
B=
Window or door that may be opened
C=
Permanently closed window
Vertical clearance to ventilated soffit located above
the terminal within a horizontal distance of 2 feet
(0.6mm) from the center of the terminal
D=
E=
F=
G=
H=
I=
J=
K=
L=
M=
Unventilated soffit
Outside corner
Inside corner
Each side of center line extended above
meter/regulator assembly
Service regulator vent outlet
Nonmechanical air supply inlet or combustion air inlet
to any other appliance
Mechanical air supply inlet
Above paved sidewalk or paved driveway located on
public property
Under veranda, porch, deck, or balcony
Outdoor Installation
(See p.8)
12" [12" (300mm)]
12" [ 36" (900mm)]
*
*
*
*
*
3' (0.9m) within a height 15' (4.5m)
above meter/regulator assembly
3' (0.9m)
12" [ 36"(900mm)]
3' above if within 10' [6' (1.8m)]
* [7' (2.1m***)]
* [12" (300mm)****]
[ ]= indicates clearances required in Canada
*Maintain clearances in accordance with local installation codes and the requirements of the gas supplier
***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.
7
Clearance Requirements from Vent Terminations to Building Openings
* All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code,
ANSI Z223.1 and in Canada, in accordance with NSCNGPIC.
Vent Clearances When Heater is
Installed in a Recess Box
Outdoor Clearances to Opening
into Any Building
Maintain the following clearances to any
opening in any building:
Illustration
For installations in the USA,
• 1' below, 1' horizontally from, or 1' above
any door, operable window, or gravity air
inlet into any building.
3' above any forced air inlet within 10'.
1'
1'
1'
3'
For installations in the USA,
• 1' below, 1' horizontally from, or 1' above
any door, operable window, or gravity air
inlet into any building.
3' above any forced air inlet within 10'.
1'
1'
1'
3'
(recess box installation with cover removed)
* For Installations in Canada, clearances are as follows: To windows, doors, & gravity air inlets: 36" (900mm).
To forced air inlets: 6' (1.8m).
8
7. Installation
Securing to the wall
Be sure to do
Item
• The weight of the device will be applied to the wall. If the strength of the wall is not
sufficient, reinforcement must be done to prevent the transfer of vibration.
• Do not drop or apply unnecessary force to the device when installing. Internal parts may
be damaged and may become highly dangerous.
• Install the unit on a vertical wall and ensure that it is level.
Check
Illustration
Location of Screw Hole
Locating Screw Holes
CAUTION
• When installing with bare hands, take caution to
not inflict injury.
• Be careful not to hit electrical wiring, gas, or water
piping while drilling holes.
Mounting Bracket
(upper)
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.
3. Determine the positions for the remaining four screws
(two for the top bracket and two for the bottom), and
remove the unit.
Locating Screw Holes
Tapping Screw
5. Hang the unit again by the first screw, and then
insert and tighten the remaining four screws.
Structure
6. Take waterproofing measures so that water does
not enter the building from screws mounting the
device.
• Make sure the unit is installed securely so that it will
not fall or move due to vibrations or earthquakes.
Installations at Elevations
Above 2,000 ft.
Mounting
4. Drill holes for the remaining four screws.
• Adjust the dip switches as illustrated in the table to
the right if this water heater is installed at an altitude
of 2000 ft. (610m) or higher.
• Disconnect power to the water heater before
changing the dip switches. Failure to perform this
step will result in a "73" code displayed on the remote
controller and a cease in operation. If this occurs,
disconnect, then reconnect power to the water heater
to reset the system.
Note : Please refer to page 19 for the location of the
dip switch bank.
* Do not change any other dipswitches.
* High elevation adjustment.
5
6
0 - 2,000 ft (0 - 610m)
2,001 - 4,000 ft (611 - 1,220m)
4,001 - 6,000 ft (1,221 - 1,830m)
6,001 - 8,000 ft (1,831 - 2,440m)
=
ON
OFF
=
9
8. Gas Piping
Follow the instructions from the gas supplier.
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 1⁄2 psig (3.5 kPa).
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 1⁄2 psig (3.5 kPa).
The appliance and its gas connections must be leak tested before placing the appliance in operation.
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.
In order to choose the proper size for the gas line, consult local codes or the National Fuel Gas Code
ANSI Z223.1.
Gas Pressure
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
Gas Meter
Select a gas meter capable of supplying the entire
btuh demand of all gas appliances in the building.
Gas Connection
• Do not use piping with a diameter smaller than
the inlet diameter of the water heater.
• Gas flex lines are not recommended unless
they are rated for 199,900 btuh.
• Install a gas shutoff valve on the supply line.
• Use only approved gas piping materials.
Measuring Gas Pressure
In order to check the gas supply pressure to the unit, a
tap is provided on the gas inlet. Remove the hex head
philips screw from the tap, and connect a manometer
using a silicon tube.
In order to check the gas manifold pressure, a pair of
taps are provided on the gas valve inside the unit.
The pressure can be checked either by removing the hex
head philips screw and connecting a manometer with a
silicon tube, or by removing the 1/8" NPT screw with an
allen wrench and connecting the appropriate pressure
gauge.
Sample Gas Line
Noritz Condensing Tankless Gas Water Heater
(199,900 Btuh)
Barbecue
(50,000 Btuh)
Outlet E
Outlet A
10' (3m)
Clothes Dryer
(35,000 Btuh)
10' (3m)
Outlet C
Section 4
5' (1.5m)
Section 3 Section 2
5' (1.5m)
5' (1.5m)
5' (1.5m)
Section 1
10' (3m)
5' (1.5m)
10' (3m)
Natural Gas
Meter
10
Outlet D
Gas Fireplace
(25,000 Btuh)
5' (1.5m)
Outlet B
Gas Range Stove
(65,000 Btuh)
**See next page for the pipe capacity charts.
Instructions
1. Size each outlet branch starting from the furthest
using the Btuh required and the length from the
meter.
2. Size each section of the main line using the
length to the furthest outlet and the Btuh
required by everything after that section.
Sample Calculation
Outlet A: 45' (13.5m) (Use 50' (15m)), 50,000 Btuh requires 1/2"
Outlet B: 40' (12m), 65,000 Btuh requires 1/2"
Section 1: 45' (13.5m) (Use 50' (15m)), 115,000 Btuh requires 3/4"
Outlet C: 30' (9m), 35,000 Btuh requires 1/2"
Section 2: 45' (13.5m) (Use 50' (15m)), 150,000 Btuh requires 3/4"
Outlet D: 25' (7.5m) (Use 30' (9m)), 25,000 Btuh requires 1/2"
Section 3: 45' (13.5m) (Use 50' (15m)), 175,000 Btuh requires 1"
Outlet E: 25' (7.5m) (Use 30' (9m)),199,900 Btuh requires 3/4"
Section 4: 45' (13.5m) (Use 50' (15m)), 374,900 Btuh requires 1-1/4"
Gas Line Sizing for a Noritz Condensing Tankless Gas Water Heater
Adapted from UPC 1997
Maximum Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
3 1/2"
4"
Length in Feet
10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 125' (37.5m)
174
119
96
82
73
66
61
56
53
50
44
363
249
200
171
152
138
127
118
111
104
93
684
470
377
323
286
259
239
222
208
197
174
1404
965
775
663
588
532
490
456
428
404
358
2103
1445
993
880
798
734
641
605
536
1161
683
4050
2784
1913
1696
1536
1413
1315
1234
1165
1033
2235
4437
3049
2703
2449
1646
6455
3563
2253
2096
1966
1857
11,412 7843
6299
5391
4778
4329
3983
3705
3476
3284
2910
16,709 11,484
9222
7893
6995
6338
5831
5425
5090
4808
4261
23,277 15,998 12,847 10,995
9745
8830
8123
7557
7091
6698
5936
Contact the Gas Supplier for Btu/Cubic Ft. of the Supplied Gas. 1000 BTU/Cubic Ft. is a Typical Value
Maximum Liquefied Petroleum (Undiluted) Delivery Capacity in Thousands of Btuh (0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
10' (3m)
275
567
1071
2205
3307
6221
20' (6m) 30' (9m)
189
152
393
315
732
590
1496 1212
2299 1858
4331 3465
Length in Feet
40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 125' (37.5m) 150' (45m) 200' (60m)
129
114
103
96
89
63
55
83
78
69
267
237
217
196
185
173
162
132
112
146
504
448
409
378
346
275
252
213
322
307
1039
913
834
771
724
677
630
567
511
440
1559 1417 1275 1181 1086 1023
866
675
787
976
1496 1260
2992 2646
2394 2205 2047 1921 1811 1606
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas (0.60 Specific Gravity, 0.5" WC Pressure Drop)
R
Pipe
Length in Feet
Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 150' (45m) 200' (60m)
121
71
67
55
48
206
147
105
94
86
80
75
3/4"
1"
132
125
118
94
82
269
218
188
168
153
141
383
418
334
284
251
227
209
194
1 1/4" 614
181
171
137
116
1 1/2" 1261
277
471
415
393
320
888
723
625
559
509
440
2"
983
933
661
2934
2078
1698
1472
1317
1203
1114
1042
762
Maximum Capacity of Flex TracPipe in Thousands of Btuh Liquefied Petroleum ( 0.5" WC Pressure Drop)
R
Pipe
Length in Feet
Size 10' (3m) 20' (6m) 30' (9m) 40' (12m) 50' (15m) 60' (18m) 70' (21m) 80' (24m) 90' (27m) 100' (30m) 150' (45m) 200' (60m)
191
112
106
87
76
325
232
166
149
136
126
118
3/4"
1"
208
197
186
143
129
425
344
297
265
241
222
605
661
528
449
397
359
330
307
1 1/4" 971
286
270
217
183
1 1/2" 1993
438
656
621
506
745
1404 1143
988
884
805
696
2"
4638
3285 2684
2327
2082
1902
1761
1647
1554
1475
1045
1205
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
TracPipe® is a registered trademark of Omega Flex.
Maximum Capacity for Gas Flex Connectors in Cubic Feet per Hour of Natural Gas (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
12" (300mm)
180
24" (600mm)
150
290
581
1470
Length in Inches
36" (900mm)
48" (1200mm)
125
106
255
215
512
442
1200
1130
60" (1500mm)
93
197
397
960
72" (1800mm)
86
173
347
930
Maximum Capacity for Gas Flex Connectors in Thousands of Btuh Liquefied Petroleum ( 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
12" (300mm)
288
24" (600mm)
240
465
930
2352
Length in Inches
36" (900mm)
48" (1200mm)
200
169
409
344
825
708
1920
1808
60" (1500mm)
149
315
638
1536
72" (1800mm)
137
278
556
1488
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
11
9. Water Piping
Installation and service must be performed by a qualified plumber. In the
Commonwealth of Massachusetts, this product must be installed by a licensed
plumber or gas fitter in accordance with the Massachusetts Plumbing and Fuel
Gas Code 248 CMR Sections 2.00 and 5.00. Observe all applicable codes.
This appliance is suitable for combination potable water and space heating applications. It cannot be used for space
heating applications only. Do not use this appliance if any part has been underwater. Immediately call a qualified
service technician to inspect the appliance and replace any part of the control system and gas control which has
been under water.
If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the
cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or a local
plumbing inspector on how to control this situation.
A pressure relief valve must be installed near the hot water outlet that is rated in accordance with and complying
with either The Standard for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI
Z21.22, or The ANSI/ASME Boiler and Pressure Vessel Code, Section IV ( Heating Boilers ). This pressure relief
valve must be capable of an hourly Btu rated temperature steam discharge of 199,900 Btuh. Multiple valves may be
used. The pressure relief capacity must not exceed 150 psig. No valve shall be placed between the relief valve and
the water heater. The relief valve must be installed such that the discharge will be conducted to a suitable place for
disposal when relief occurs. No reducing coupling or other restriction may be installed in the discharge line. The
discharge line must be installed to allow complete drainage of both the valve and the line. If this unit is installed with
a separate storage vessel, the separate vessel must have its own temperature and pressure relief valve. This valve
must also comply with The Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22. (in the U.S. only). A temperature relief valve is not required, but if one is used, do not install
the valve with the probe directly in the flow of water. This may cause unwarranted discharge of the valve.
Piping and components connected to the water heater shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water.
A water heater used to supply potable water may not be connected to any heating system or components
previously used with a nonpotable water heating appliance.
When water is required in one part of the system at a higher temperature than in the rest of the system, means
such as a mixing valve shall be installed to temper the water to reduce the scald hazard.
• Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.
• Perform the following insulation measures for prevention of freezing.
- Take appropriate heat insulation measures (e.g., wrapping with heat
insulation materials, using electric heaters) according to the climate Completely insulate
Do not cover the water
the water inlet and
of the region to prevent the pipe from freezing.
drain plug with insulationso t
outlet fittings.
can be drained.
- Make sure that there are no water leaks from the cold and hot water
supply pipes, then insulate the pipes completely.
- Be sure to also completely insulate the water supply valve and the
Insulate the water
cold and hot water connections on the water heater (refer to the figsupply valve completely.
ure on the right).
- Do not cover the water drain plug with insulation so that water in the
pipe can be drained. (Refer to the figure in the right.)
• Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping.
• Do not use piping with a diameter smaller than the coupling.
• When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measure.
• Avoid using joints as much as possible to keep the piping simple.
• Avoid piping in which an air holdup can occur.
• If installing the unit on a roof:
• About lower-level hot water supply
If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied
to the unit does not drop below 29 psi. It may be necessary to install a pump system to ensure that the water
pressure is maintained at this level.
Check the pressure before putting the unit into operation.
Failure to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and
may cause the unit to shut down frequently.
12
Supply water piping
• Do not use PVC, iron, or any piping which has been
treated with chromates, boiler seal or other chemicals.
• Mount a check valve and a shut off valve (near the inlet).
• In order for the client to use the water heater
comfortably, 98.1 to 491 kPa (14 to 70 PSI) of
pressure is needed from the water supply.
Be sure to check the water pressure. If the
water pressure is low, the water heater cannot
perform to its full capability, and may become a
source of trouble for the client.
Hot water piping
• Do not use lead, PVC, iron or any piping which
has been treated with chromates, boiler seal or
other chemicals.
• The longer the piping, the greater the heat loss.
Try to make the piping as short as possible.
• Use mixing valves with low water resistance.
Use shower heads with low pressure loss.
• If necessary, use a pump or other means to
ensure that the supply water pressure to the
inlet of the heater does not fall below 29 PSI
when the maximum amount of water is being
Drain piping
demanded. Also install a pressure meter on
• Expansion water may drop from the pressure
the inlet. If this is not done, local boiling will
relief valve and wet the floor.
occur inside the water heater causing abnormal
If necessary, provide drain piping or use a drain
sounds and decreasing the durability of the heat
hose to remove the water.
exchanger.
Freeze Prevention
• Freezing is prevented within the device automatically unless the outside temperature without wind
is below -4°F (-20°C).
• If this model is installed in an area where the outside temperature can approach freezing conditions
of -4°F (-20°C) or below, then additional freeze protection measures must be used. For temporary
freeze protection measures, refer to the Owner's Guide.
• The freeze prevention heaters will not prevent the plumbing external to the unit from freezing.
Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers.
• In order for the freeze prevention heaters to operate, the water heater must have power at all times.
13
Water Treatment
If this water heater will be installed in an application where the supply water is hard, the water must be
treated with either the Noritz H2Flow or ScaleShield or a water softener. Refer to the below tables for
suggested treatment and maintenance measures to be taken based on the water hardness level.
Damage to the water heater as a result of water in excess of 12 gpg (200 mg/L) of hardness is not
covered by the Noritz America Limited Warranty.
Note: Water softeners may be regulated by the local water jurisdiction, consult with the manufacturer
for code, sizing, and installation guidelines; the below diagram is for reference only. For more
information about H2Flow and ScaleShield, contact Noritz America at 866-766-7489.
Residential Use Treatment Guidelines
Hardness
Level
Type of Water
Commercial Use Treatment Guidelines
Treatment
Device
Flush
Frequency*
Type of Water
None
None
Soft
None
None
Slightly Hard
0-1 gpg
(0-17 mg/L)
1-3 gpg
(17-51 mg/L)
Moderately
Hard
3-7 gpg
(51-120 mg/L)
Hard
7-10 gpg
(120-171 mg/L)
0-1 gpg
(0-17 mg/L)
1-3 gpg
Slightly Hard
(17-51 mg/L)
3-7 gpg
Moderately
(51-120 mg/L)
Hard
7-10 gpg
Hard
(120-171 mg/L)
10-14 gpg
Very Hard
(171-239 mg/L)
> 14 gpg
Extremely
(> 239 mg/L)
Hard
Soft
H2Flow or
ScaleShield
Once a Year**
H2Flow or
ScaleShield
Once a Year**
H2Flow
Treatment
Required
H2Flow
Treatment
Required
* Install Noritz Isolation Valves to allow for flushing.
** Flushing is required if a water treatment device is not installed.
Very Hard
Extremely
Hard
Hardness
Level
Treatment
Device
Flush
Frequency*
None
None
None
None
H2Flow
Suggested
Once a Year **
H2Flow
Suggested
Twice a Year**
H2Flow
Treatment
Required
H2Flow
Treatment
Required
10-14 gpg
(171-239 mg/L)
> 14 gpg
(> 239 mg/L)
* Install Noritz Isolation Valves to allow for flushing.
** Flushing is required if a water treatment device is not installed.
Water Treatment System
Shutoff Valve
NORITZ
Condensing
Tankless Gas
Water Heater
Pressure
Relief
Valve
Drain
14
City Water Supply
Cold to Water
Heater
Optional Sediment
Filter
Shutoff Valve
Hot Water to Fixtures
Water Treatment Device
10. Condensate Piping
CAUTION
Due to the acidic nature of the condensate, be sure to properly drain and if necessary, treat the
condensate prior to disposal. Damage caused by improperly handled condensate is not covered
by the warranty.
• This water heater is a high efficiency, fully condensing appliance which produces acidic condensate
during operation. The water heater incorporates a collection and removal system which must be
properly drained in order to ensure proper operation of this appliance.
• The pH level of the condensate is approximately 2-3. An external neutralizer must be installed on the
drain piping prior to disposal when required by local code or when the condensate could cause damage.
• If an external neutralizer is installed, periodic replacement of the neutralizing agent will be required.
Refer to the instructions supplied with the neutralizer for suggested replacement intervals.
• In order to drain the condensate, a 1/2" threaded fitting is provided at the base of the water heater.
Do not reduce the size of this fitting or the drain piping to less than 1/2".
In cold climates, do not drain the condensate to the outdoors. If the drain pipe freezes during cold
weather, the pipe will not drain condensate and the unit will stop operating.
• Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material
which can corrode when placed into contact with acidic condensate.
• Keep the length of the drain pipe as short as possible. Long runs or applications where the nearest
drain is above the water heater will require the use of a condensate pump. Size the pump to allow for
a maximum condensate discharge of 2 GPH from the water heater.
• Horizontal runs must be sloped 1/4" per foot towards the drain or condensate pump. The condensate
will be discharged by gravity force only. Make the drain pipe run as short as possible.
• The end of the drain pipe must not be submerged in water or blocked in any way. To ensure proper
drainage, leave the end of the drain pipe open to the atmosphere. Do not have a trap. Also, make
sure that there are no obstructions blocking the drain line from discharging condensate.
• Be sure to check that condensate is freely flowing from the drain piping after the system has been
installed. Condensate will begin flowing out of the water heater within 15 minutes after operation has
started.
• Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric
heaters, etc.).
Water heater
Drain connecting
supply
Do not pitch the drain line up
once a horizontal section has
been introduced.Always pitch
the drain line down to ensure
proper drainage.
Heat insulation
material
Drain pipe
Drain pipe
15
Condensate piping to floor drain
Condensate piping with pump
NORITZ
Condensing
Tankless Gas
Water Heater
DO NOT ADD
ANY VALVES
DO NOT ADD
ANY VALVES
1/2" PVC pipe
Slope pipe downwards
1/4" per foot.
Floor drain
NORITZ
Condensing
Tankless Gas
Water Heater
The end of the drain pipe
must have an air gap.
MAINTAIN CLEARANCE
1/2" PVC elbow
1/2" PVC pipe
Slope pipe downwards
1/4" per foot.
The end of the drain pipe
must have an air gap.
3/8" ID tubing*
Condensate pump
* Install tubing according to pump
manufacturer's instructions.
Note:
If the drain line becomes clogged or frozen, condensate will back-up into the water heater and a "29"
error code will flash on the remote controller, ceasing operation. If this occurs, clear the clog or freeze
so that condensate can freely flow. Be sure to slope the drain pipe, use the appropriate size pipe, allow
the proper clearances, and apply freeze prevention measures (when necessary) to prevent the drain
line from clogging or freezing.
16
11. Plumbing Applications
Recirculation System
NORITZ
Condensing
Tankless Gas
Water Heater
Notes:
1. Size the pump to provide a maximum of 2 GPM
(7.5 L/min.) through the system at 10 ft (3m) of
head plus piping losses.
Adjust the flow using a globe valve and verify the
flow rate with the maintenance monitors.
2. Pump Control Signal is the preferred method to
control the recirculation pump.
For pumps larger than 85W, a relay connection
must be used. If the Pump Control Signal is not used,
an Aquastat may be used to control the pump.
Hot Water Return
Cold Water Supply
Fixtures
3. Use an Aquastat if the water heater is not controlling
the pump.
Set the Aquastat to 10°F (5°C) below the set
output temperature.
4. Noritz recommends the use of an Isolation Kit with
the installation.
These kits include an integrated shut-off and service
valve with unions and a pressure relief valve.
Expansion Tank
(Install according
to local code)
Isolation
Kit(*4)
Gas Supply
Globe
Valve
Aquastat(*3)
Pump Control Signal(*2)
105
Pump
Pump(*1)
Relay for Pump
(if larger than 85 Watts) Optional 8-10 Gallon
Storage Tank
(To alleviate cold water sandwich)
R
120VAC
B S
Hot Water
W
Neutral
Ground
Live
Aquastat Wiring
Use Honeywell Aquastat
(Model L6006A or L6006C)
Combination Potable Water and Space Heating System
Notes:
Air Handler
NORITZ
Condensing
Tankless Gas
Water Heater
Pump(*2)
Isolation
Kit(*1)
Check
Valve(*3)
Gas Supply
1. Noritz recommends the use of an Isolation Kit with
the installation.
These kits include an integrated shut-off and service
valve with unions and a pressure relief valve.
2. Size the pump to provide a maximum of 3 GPM
(11.3 L/min.) with a head pressure equal to the loss
through the water heater and Air Handler.
3. Check valve required if it is not included with the pump.
4. Set the flow switch to deactivate the Air Handler when
the domestic hot water flow reaches 3 GPM (11.3 L/min.).
Adjust as necessary to prevent cycling.
5. If the system requires water for space heating at a higher
temperature than for other uses, means such as a
mixing valve shall be provided to temper the water for
the other uses to help prevent scalding.
6. Expansion tank required if a backflow preventer is installed.
7. The water heater cannot be used for space heating
applications only.
8. Only POTABLE water may be plumbed through
the water heater.
Flow Switch(*4)
Backflow Preventer
(optional)
Cold Water
Supply
Optional
Expansion Tank(*6)
Mixing Valve(*5)
Hot Water
Fixtures
17
12. Electrical Wiring
Consult a qualified electrician
for the electrical work.
Do not connect electrical power to the unit until all electrical wiring has been completed.
Disconnect Power
This appliance must be electrically grounded in accordance with local codes, or in the absence of local
codes, with the National Electrical Code, ANSI/NFPA 70. In Canada, the latest CSA C22.1 Electrical Code.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
WARNING
Electrical Shock Hazard
Do not turn power on until electrical wiring is finished. Disconnect power before servicing.
Failure to do so may result in death or serious injury from electrical shock.
• The electrical supply required by the water heater is
120VAC at 60 Hz.
The power consumption may be up to 303W or higher if
using optional accessories.
Use an appropriate circuit.
• Do not disconnect the power supply when not in use. When
the power is off, the freeze prevention in the water heater
will not activate, resulting in possible freezing damage.
• Do not let the power cord contact
the gas piping.
Tie the redundant power cord
outside the water heater. Putting the
redundant length of cord inside the
water heater may cause electrical
interference and faulty operation.
Ground
• To prevent electrical shock, provide a ground
with resistance less than 100 . An electrician
should do this work.
• A grounding screw is provided on the back in
the junction box.
Junction Box
Ground
Do not connect the ground to the city water
or gas piping. Do not tie the ground to a
telephone line.
Breaker Installation
• Mount a device which shuts off the electrical
path automatically (leakage breaker) when
electrical leakage is detected.
Power Cord
1. Remove the screw (one) of the junction box and
open the cover of the junction box.
2. Connect the grounding wire to the ground screw in
the cover.
3. Crimp the outdoor power cable to the power cable
of the unit.
CAUTION
Electrostatic discharge can affect electronic components. Take precautions to prevent electrostatic discharges from
personnel or hand tools during the water heater installation and servicing to protect product’s electronic control.
18
Remote Controller
• Applicable Model
Noritz Condensing Tankless Gas Water Heater
* Remarks [125 °F / 55 °C]
Celsius display mode
Fahrenheit display mode
RC-7651M
Remote controller
Install the remote controller according to the instructions in the Installation Guide (p. 26).
* Only one remote controller can be connected to the water heater.
A malfunction may occur if two or more remote controllers are connected.
* The water heater has been factory set to allow a maximum temperature setting of [120 °F / 50 °C].
To access higher temperature settings through the remote controller, follow the below steps.
<When setting the maximum temperature to [125 -140 °F / 55 - 60 °C]>
1. Turn the water heater off by pressing the Power On/Off Button on the remote controller.
2. Press and hold the FLOW METER ALARM SET Button until a sound is heard (2 sec.) and [120 °F / 50 °C]
appears on the display.
3. Set the upper limit of the hot-water supply temperature to [125 °F, 130 °F, 135 °F or 140 °F / 55 °C or 60 °C]
using the UP and DOWN setting Buttons.
4. To put the water heater back into operation, press the Power On/Off Button on the remote controller.
To keep the water heater off, let the unit sit for 30 sec. to return to the original display.
• This unit can be programmed so that it will default to one of three temperatures if the remote controller
is removed [140 °F (60 °C), 135 °F (57 °C), 120 °F (50 °C)]. To change the default temperature,
adjust the dip switches as described below. The default temperature is 120 °F (50 °C).
1. Disconnect electrical power to the water heater.
2. Remove the front cover of the water heater (4 screws).
3. Disconnect the remote controller. Adjust the dip switches as illustrated below.
4. Replace the front cover of the water heater (4 screws).
5. Reconnect electrical power to the water heater.
* Do not change any other dipswitches.
* High temperature.
1
2
Check
120 F (50 C)
Check
135 F (57 C)
140 F (60 C)
=
ON
OFF
=
DANGER
• When changing the temperature, make sure to confirm with the customer that the temperature of
the hot water will be very high and that there is a risk of scalding.
• Hot water heater temperatures over 125 °F (52 °C) can cause severe burns instantly or death
from scalding.
19
Connecting Remote Controller Cord to Unit
•
•
•
•
Keep the remote controller cord away from the freeze prevention heaters in the unit.
Tie the redundant cord outside the water heater. Do not put the extra length inside the equipment.
The remote controller cord can be extended up to 300' (90m) with 18AWG wire.
Use a Y type terminal with a resin sleeve. (Without the sleeve, the copper wire may corrode and
cause problems).
• Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to
the terminal block.
Remote controller cord
• For extensions, a 26' (8m) cord can be purchased (Part # RC-CORD26) or use 18AWG wire.
• Install according to the National Electrical Code and all applicable local codes.
1. Check to make sure that the remote controller
cord has plenty of slack in order to reach the
external connection terminal block.
2. Disconnect electrical power to the water heater.
3. Remove the single screw securing the terminal
block cover and then remove the cover.
4. Pass the remote controller cord through the wiring
throughway and connect the Y terminals at the end
of the remote controller cord to the terminal block.
5. Replace the terminal block cover and install the
screw previously removed in step 3.
6. Reconnect electrical power to the water heater.
External connection
terminal block
Wiring throughway
Remote controller cord
Changing Other Features
Adjusting the Temperature Display
Note: The setting must be done within the first 10 minutes of connecting electrical power to the water heater.
Table of Setting Items
Item No.
Item
12
Celsius/Fahrenheit
display mode.
Remote Controller
Display
Choices (factory defaults shaded)
°F (Fahrenheit)
°C (Celsius)
Setting Button
Power On/Off Button
Flow Meter Alarm Set buttton
20
Setting Procedure
1. Turn the water heater off by pressing the Power On/Off Button on the remote controller.
2. Disconnect, then reconnect electrical power to the water heater.
3. Press the Flow Meter Alarm Set Button and hold it in for 2 seconds or more.
4. Press the Flow Meter Alarm Set Button until the remote controller displays item number "12".
5. Press Setting Button " " for 5 seconds or more to change the display units to °F.
6. Press Setting Button " " for 5 seconds or more to change the display units to °C.
7. To confirm the setting, turn the water heater on by pressing the Power On/Off Button on the
remote controller.
Pump Wiring
* This feature is not available when using the Quick
Connect Multi System feature.
Connecting the pump control wire
PUMP
1. Leave enough slack so that the pump control wires
will stay connected if the unit is removed from the
wall.
2. Remove the front cover of the heater (4 screws).
3. Cut off the connector at the end of the pump
control wires.
4. Wire the pump control wires through the wiring
throughway and connect them to the wiring inside
the pump (this will be the power supply for the pump,
do not also connect 120VAC to the pump).
If a large pump is being used (greater than 85W) use
the voltage from these wires as the signal to close a
normally open relay through which 120VAC will be
supplied directly from a wall circuit to the pump.
5. Replace the front cover.
Pump Control
Wire Tag
Crimping Terminal
Wiring
Throughway
Supplies Power for
Circulating Pump
(Use a Relay for
Larger Pumps)
Relay connection with larger pumps (>85 W)
1. Locate and prepare the pump control wires as described above.
2. Choose a suitable installation location for the relay where it will be protected from moisture.
3. Connect the pump control wires from the heater to the signal input on the relay.
4. Cut one of the electrical supply leads and wire it across the open terminals of the relay.
5. Secure all connections and replace the front cover of the heater.
120VAC
Connect to Pump Control
Wires in Unit
1
4
0
2
Relay (ex. Omron G7L2ABUBJCBAC120)
Circulation Pump
21
Connecting Quick Connect Cord-2
For Quick Connect Multi System Installation
use part #QC-2 only. (sold separately).
Caution
The wire coloring on the Quick Connect Cord-2 will
not be the same as the wire coloring of the
connection plug inside the unit.
* The remote controller can be connected to
either unit A or B. Do not connect a remote
controller to both units.
* Disconnect the remote controller from either
unit A or B prior to installing the Quick Connect
Cord.
Quick Connect
Cord-2
1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue
1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue
A
1.White
2.Green
3.Red
4.Black
5.Blue
6.Blue
1.Red
2.Black
3.White
4.Green
5.Blue
6.Blue
B
"Quick Connect Cord-2" tag
Connecting the Quick Connect Cord to the two
units.
1. Turn off the power.
2. Remove the front cover of the heater (4 screws).
3. Pass the Quick Connect Cord through the wiring
throughway and into the unit.
4. Plug the connector on the Quick Connect Cord to
the receptacle inside the unit.
5. Attach the ground wire of the Quick Connect Cord
to the terminal block fixing plate.
(If the ground wire is not attached, electrical nois
may cause problems).
6. Secure the Quick Connect Cord with a clamp.
7. Replace the front cover.
22
Clamp
Connector
Wiring Throughway
Ground wire Connector
(Use one of the vacant holes)
Coupling Cord
13. Maintenance
Periodically check the following to ensure proper
operation of the water heater.
• The venting system must be examined periodically by a qualified service technician to check for
any leaks or corrosion.
• The burner flame must be checked periodically for a proper blue color and consistency.
• If the flame does not appear normal, the burner may need to be cleaned.
• If the burner needs to be cleaned, it must be performed by a qualified service technician.
• Do not obstruct the flow of combustion and ventilation air.
• The pressure relief valve must be operated once a year to ensure that it is functioning properly and
there is no obstruction. Turn the power off to the unit before opening the relief valve, and make sure
that water draining out of the valve will not cause any damage.
• If the relief valve discharges periodically, it may be due to thermal expansion in a closed water
system. Contact the water supplier or a local plumbing inspector on how to correct this situation.
Do not plug the relief valve.
• See Operation Manual for further maintenance.
Warning: There is a scald potential if the output temperature is set too high.
Should overheating occur, or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.
Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas control
which has been under water.
Periodically check and clean the filter inside the cold water inlet of the unit.
14.
Trial Operation
The installer should test operate the unit, explain to
the customer how to use the unit, and give the owner
this manual before leaving the installation.
• Preparation ........... (1) Open a hot water fixture to confirm that water is available, and then close
the fixture.
(2) Open the gas supply valve.
(3) Turn on the power supply. Using the remote controller, turn on the Power
On/Off button (the Operation lamp will turn on).
(1) Open a hot water fixture and confirm that the Burner On lamp comes on, and that hot water is
being produced. (If necessary, repeat until the air in the gas piping is bled out).
* White smoke may be noticed from the exhaust vent during cold weather. However, this is not a
malfunction of the unit.
* If an “11” error code appears on the remote controller, turn the unit off and then back on again,
and then open a hot water fixture again.
(2) Change the temperature setting on the remote controller and check that the water temperature changes.
• If the water heater does not operate normally, refer to “Troubleshooting” in the Operation Manual.
* After the trial operation, clean the filter in the cold water inlet.
<If installed with a quick connect multi-system>
• Turn the system power ON with the remote controller.
• Slowly open a hot water fixture and check that the units ignite sequentially. Check to see that the
hot water temperature is the same as the temperature displayed on the remote controller (*1)
* If both units do not ignite, switch which unit will ignite first by pressing the Max. or Min. Mani-fold
Pressure Set Button on the circuit board. (*2)
Unit A Ignites
Unit B Doesn't Ignite
Press Max. or Min. Manifold
Pressure Set Button on Unit B
Unit A Doesn't Ignite
Unit B Ignites
* If an 11 or F11 error code flashes on the remote controller, hit the Power Button on the remote
controller off and on 2 -3 times.
* If (*1) and (*2) cannot be done, the Quick Connect Cord may not be properly connected.
Check that the cord is properly connected.
23
CAUTION
Handling after trial operation
• If the unit will not be used immediately, close off all gas and water shutoff valves, drain all
of the water out of the unit and the plumbing system to prevent the unit and system from
freezing, and bleed the gas out of the gas line.
Freezing is not covered by the warranty.
WARNING
A fire or explosion may result if these instructions are not followed, which may cause lose of
life, personal injury or property damage.
Lighting Instructions
This water heater does not have a pilot. It is equipped with an ignition device that automatically lights
the burner.
Do not try to light the burner by hand.
1. Read the safety information in the installation manual or on the front of the water heater.
2. Turn off all electrical power to the unit.
3. Do not attempt to light the burner by hand.
4. Turn the gas control manual valve (external to the unit) clockwise to the off position.
5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the
instructions on page 3 of Owner's Guide.
6. Turn the gas control manual valve counterclockwise to the on position.
7. Turn on electric power to the unit.
8. The unit will now operate whenever hot water is called for. If the unit will not operate, follow the
shutdown instructions and call a service technician.
Shutdown Instructions
1. Stop any water demand.
2. Turn off electric power.
3. Turn the gas control manual valve clockwise to the off position.
Should overheating occur, or the gas supply fail to shut off, turn off the manual control valve to the appliance.
24
15. Dimensions
< inch [mm] >
17.7" (450mm)
4 - Ø0.5" (Ø13mm)
6 - 0.24" x 0.4" (6 x 10mm) OBLONG HOLE
18.3" (464mm)
17.6" (448mm)
10.5" (267mm)
0.5" (13mm)
1.1" (28mm)
3.9" (99mm)
2.4" (61mm)
9.4" (240mm)
1.6" (42mm)
FLUE COLLAR
24.2" (615mm)
24.0" (611mm)
2.1" (53mm)
1.6" (40mm)
0.4" (10mm)
23.1" (586mm)
26.2" (665mm)
6.7" (170mm)
5.5" (140mm)
3.9" (100mm)
2.8" (70mm)
1.4" (36mm)
AIR INLET
AIR INLET
0.4" (10mm)
WATER DRAIN VALVE
(WATER FILTER)
GAS INLET
HOT WATER OUTLET
WATER DRAIN VALVE
WATER DRAIN VALVE
WIRING THOROUGHWAY
(AC120V)
COLD WATER INLET
NRC1111-OD
0.8" (20mm)
1.7" (44mm)
2.2" (55mm)
2.2" (56mm)
(VIEW FROM TOP)
10.0" (255mm)
8.4" (214mm)
3.9" (99mm)
2.8" (70mm)
HOT WATER OUTLET (3/4")
CONDENSATE DRAIN (1/2")
WIRING THOROUGHWAYS
WIRING THOROUGHWAY
(AC120V)
2.8" (71mm)
5.3" (135mm)
6.7" (171mm)
7.0" (177mm)
CONDENSATE DRAIN
HOT WATER OUTLET
COLD WATER INLET
GAS INLET
16.9" (428mm)
CONDENSATE DRAIN
WATER DRAIN VALVE
6 - 0.24" x 0.4" (6 x 10mm) OBLONG HOLE
4 - Ø0.5" (Ø13mm)
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
1.7" (44mm)
WIRING THOROUGHWAYS
6.1" (155mm)
4.3" (109mm)
2.4" (60mm)
1.4" (36mm)
2.8" (70mm)
3.9" (100mm)
5.5" (140mm)
6.7" (170mm)
GAS INLET (3/4")
COLD WATER INLET (3/4")
3.9" (98mm)
5.7" (146mm)
14.2" (362mm)
25
For Installers:
Read this installation guide
carefully before carrying out
installation.
Remote Controller RC-7651M
Installation Guide
NORITZ AMERICA CORPORATION
Note
Do not connect power to the water heater before the remote controller has been properly installed.
Recommended installation location of the remote controller is in a bathroom.
Included Parts List
Part Name
Quantity
Remote Controller
Wall Packing
Phillips Roundhead Wood Screw
Wall Anchor
1
1
2
2
Wall Packing
Connecting Wire
Phillips Roundhead
Wood Screw
Wall Anchor
Do not disassemble the remote controller.
Notes on the Installation Location
• The remote should be installed in an easily
accessible location.
• Avoid installing in a place where water
or steam can come into contact with the
controller.
• Avoid locations where special chemical
agents (e.g., benzene, fatty and oily deter
gents) are used.
26
• Avoid outdoor installation, or installation in
an indoor location where it will be exposed
to direct sunlight.
Remote Controller
Connection of Remote Controller Cord
White Connector
To Remote controller
Y-shaped terminals
(two-core)
To Water heater
* Confirm the connection with the labels at
both ends of the remote controller cord.
• A 26' (8m) cord can be purchased separately
(Part # RC-CORD26).
• The remote controller cord can be extended
up to 300 ft. (90m) by splicing the cord and
using 18 gauge wire to extend the cord to
the appropriate length.
Installation
1. Apply Wall Packing to the rear side of the
remote controller.
2. Connect the remote controller wires to the
separate remote controller cord.
3. Remove the cover of the remote control,
mark the location of the screw holes, and
drill holes for the wall anchors.
4. Insert the wall anchors, screw the remote
control to the wall and replace the cover.
Remote
Control
Wires
Wall Packing
(take off the paper)
Remote Controller Cord
Wall Anchor
Rear Side of
Remote Controller
Phillips Roundhead
Wood Screw
27
Installing the Remote Controller Outdoor Junction Box
1. Insert the remote controller wires through
the wall pipe and secure the wall pipe to the
remote controller. Locate the remote controller
wall packing, slide it over the pipe and wires,
and apply it to the rear side of the remote.
5. Slide the box nut over the remote controller
wires and screw it onto the wall pipe.
Wall Pipe
Rear side of remote controller
Box Nut
Remote
Controller
Wires
Wall Packing
Secure the wall pipe
firmly into the remote
controller.
Take off the
paper.
2. Drill a 1-1/4" hole in the wall where the
remote controller will be installed.
* Do not install the remote controller in a
location that is exposed to moisture, direct
sunlight, or chemical agents. These can
damage the remote controller.
6. Connect the remote controller wires to the
separate remote controller cord inside the
box. Wind the excess remote controller wire
on the provided hooks as illustrated below.
(Wind the excess wire here.)
Remote Controller
Wires
3. Insert the wall pipe containing the remote
controller wires through the hole.
Junction Box
4. Slide the junction box packing and the junction
box over the remote controller wires and wall
pipe protruding from the outside wall.
Remote Controller
Cord
Wall packing
Wall pipe
Take out the pipe about
3/4" from the wall.
Junction Box
Box Nut
Remote
Controller
Wires
Take off the paper.
Junction Box Packing
28
Tie the redundant length of the remote
controller cord outside the junction box.
7. Close the junction box.
Requests to Installers
Optional Remote Controller
RC-9018M
● In order to use the water heater safely, read this installation
guide 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.
● Refer to the Installation Manual provided with the water
heater for complete installation details.
Installation Guide
NORITZ AMERICA CORPORATION
In order to use this product safely, read this installation manual carefully and follow the installation
instructions.
● Potential dangers from accidents during installation and use are described below.
Closely observe these warnings, they are critical to your safety.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION
• Do not connect power to the system unit until the remote controller installation is complete.
• Be sure to fasten the mounting screws tightly by hand so that the remote controller will be secure.
* Do not use electric drivers, impact drivers and so forth. Tightening with excessive force may
cause the mounting bracket to be damaged and lead to failures.
• Install the remote controller on an even wall surface.
* Installing it on an uneven wall surface may cause the bracket to be damaged and lead to failures.
• This remote controller has a built-in speaker which can be damaged by metal shavings resulting in
sound cracking.
Keep the remote controller in a safe location prior to mounting it on the wall to prevent metal
shavings from entering the remote controller.
Note
• Cutting too large of a hole on the wall may result in failure to properly secure the remote controller.
• Never fasten or loosen unnecessary screws in order to complete the remote controller installation.
• Be sure to check the positions of wall studs or other obstructions when determining the installation
location for the remote controller.
• Secure the remote controller cable with approriate anchors, ties, etc.
• Wire the remote controller cable in an area where it will not be directly affected by heat.
• To embed the remote controller cable in concrete, brick, etc., enclose it in conduit in order to prevent
the remote controller cable from becoming damaged.
• When penetrating a wall containing metal lath, prevent the lath from coming into contact with any
metallic conduit used in order to prevent electrical interference.
• Wiring shall be provided so that the remote controller cable length is 300 ft (90m) or shorter.
• Connect the remote controller cable to the terminal block of the water heater (see Installation Manual
provided with the water heater).
Post-installation Checks
Explanation to the Customer
(1) Check if the remote controller is installed securely.
(2) Verify remote controller operation (see Owner's Guide).
* Press the Power On/Off button approximately 5 seconds
after connecting power to the system.
* Check if the temperature setting on the remote controller is
appropriate.
Explain the “Important Safety
Information”, “Operation Procedures”
and “Follow-up Service” according
to the Owner's Guide supplied
with the water heater.
29
Included Parts List
Remote Controller
(1)
(The value in ( ) indicates the quantity.)
Mounting
bracket
(1)
Raised countersunk
head wood screw
Wall anchor
(2)
Raised countersunk
head screw
(2)
(2)
Machine
screw
(2)
(For junction box
installation)
Notes on the Installation Location
• The remote should be installed in an easily
accessible location.
• Avoid installing in a place where water
or steam can come into contact with the
controller.
• Avoid locations where special chemical
agents (e.g., benzene, fatty and oily deter
gents) are used.
• Avoid outdoor installation, or installation in
an indoor location where it will be exposed
to direct sunlight.
Connection of Remote Controller Cord
White Connector
To Remote controller
Y-shaped terminals
(two-core)
To Water heater
* Confirm the connection with the labels at
both ends of the remote controller cord.
• A 26' (8m) cord can be purchased
separately (Part # RC-CORD26).
• The remote controller cord can be extened
up to 300 ft (90m). by splicing the cord and
using 18 gauge wire to extend the cord to
the appropriate length.
Installation
1. Attach the mounting bracket to the wall.
The parts to be used vary depending on the
attachment method.
* Never use electric drivers, impact drivers
and so forth.
Tightening with excessive force may
result in deformation of the mounting
bracket and/or failures.
<When attaching to a junction box>
• Use the raised countersunk head screws to
attach the mounting bracket to the junction box.
(In this case, the wall anchor and raised
countersunk head wood screws are not used.)
Junction box
Mounting bracket
(accessory part)
<When attaching to a wood surface>
• Use the raised countersunk head wood screws
to attach the mounting bracket.
(In this case, the wall anchor and raised
countersunk head screws are not used.)
Mounting bracket
(accessory part)
Raised countersunk
head wood screw
(accessory part)
Top
Confirm the orientation
of the mounting bracket.
Bottom
<When attaching to a concrete wall surface>
• Drill a φ1/4” (φ6mm) hole, approx. 1” (25mm)
in depth, and hammer in the wall anchor.
Attach the mounting bracket using the raised
countersunk head wood screws.
(In this case, raised countersunk head screws are not used.)
Wall anchor (accessory part)
Top
Bottom
Confirm the orientation of the
mounting bracket is correct.
Mounting bracket
(accessory part)
Raised countersunk
head screw
(accessory part)
Top
Confirm the orientation
of the mounting bracket.
30
Bottom
Raised countersunk
head wood screw
(accessory part)
2. Remove the decorative frame from the remote
controller. (The remote controller is inserted
in the decorative frame.)
Main remote
controller body
Remove the remote
controller while pulling
the decorative frame
forward.
5. Attach the remote controller to the mounting
bracket. Insert the bottom of the remote
contoller into the groove at the bottom of the
bracket and push in the 2 hooks on top of the
remote controller completely.
* If it is difficult to attach, do not try to force it
as it may result in broken hooks. Check for
proper alignment in the groove or for loose
wires obstructing the remote controller.
Mounting
bracket
Hooks
* Do not install on the
bracket by force, the
hooks may break.
Decorative frame
Groove
3. Connect the remote controller wires to the
cord supplied with the water heater.
* Do not remove the remote controller wires
from the terminal block, conect these wires to
the remote controller cord.
* Do not remove the insulating cover (clear).
Main remote
controller body
6. Secure the remote using the machine screws.
Machine screw
(accessory part)
Main remote
controller body
7. Attach the decorative frame which was
removed in the second step.
Push the 4 corners of the decorative frame
until there is a click.
Remote controller
wires
* Incomplete
installation may
result in failures
such as switch
operation failure.
Remote controller
cord
* Check the terminal is covered with Section A
(
) of the insulating cover (clear, see Fig. 1).
* If the Y-shaped terminal is not covered, the
exposed section may come into contact with
the mounting bracket resulting in improper
operation or failure.
4. Secure the remote controller wires by winding
them around the notches as shown in Fig. 1.
• See Fig. 1 for wiring inside the wall.
Fig. 1
Rear side of the remote controller
Section A
Remote controller wire
Pass the remote
controller wires
through the notch.
Insulating cover
(Do not remove
the cover.)
Mounting bracket
Winding around the notches
Click
Click
Click
Click
Note: To remove the decorative frame after
installation of the remote controller and
the frame, pull the entire decorative
frame forward while pressing the sections
indicated (where the fingers are) in the
figure below.
* If it does not come off, insert a flat head
driver into the notch at the bottom of the
decorative frame and slightly twist it to
remove (due caution is required not to
scratch the remote controller, decorative
frame or the wall in doing so).
Put fingers into this gap.
31
Optional Remote Controller
• Applicable Model
Noritz Condensing Tankless Gas Water Heater
Remote controller
* Remarks [125 °F / 55 °C]
Celsius display mode
Fahrenheit display mode
RC-9018M
Install the remote controller according to the instructions in the Installation Guide. (p. 29).
* Only one the remote controller can be connected to the water heater.
A malfunction may occur if two or more remote controllers are connected.
* The water heater has been factory set to allow a maximum temperature setting of [120°F / 50°C].
To access higher temperature settings through the remote controller, follow the below steps.
<When setting the maximum temperature to [125 -140°F / 55-60°C]>
1. Turn the water heater off by pressing the Power On/Off Button on the remote controller.
/
Buttons.
2. Press the MENU Button inside the remote cover, select "Misc settings" using the
3. Press the ENTER Button, the "Misc settings" screen appears on the display.
4. Select "Max set Temp" using the
/
Buttons.
5. Press the ENTER Button, [120°F / 50°C] appears on the display.
6. Set the upper limit of the hot-water supply temperature to [125°F, 130°F, 135°F or 140°F / 55°C or 60°C]
using the
/
Buttons.
7. Press the ENTER Button, "Set complete" appears on the display and then returns to the "Misc settings"
screen.
8. To put the water heater back into operation, press the Power On/Off Button on the remote controller.
To keep the water heater off, either press the MENU Button or let the unit sit for 20 sec. to return to
the original display.
DANGER
• When changing the temperature, make sure to confirm with the customer that the temperature of
the hot water will be very high and that there is a risk of scalding.
• Hot water heater temperatures over 125 °F (52 °C) can cause severe burns instantly or death
from scalding.
32
Changing Other Features
Adjusting the Temperature / Water Quantity Display
Note: The setting must be done within the first 10 minutes of connecting electrical power to the water heater.
Table of Setting Items
Item
Choices (factory defaults shaded)
Celsius/Fahrenheit
display mode.
°F (Fahrenheit) / gal
°C (Celsius) / L
Remote Controller
Power On/Off Button
Display
MENU Button
▲/▼ Buttons
ENTER Buttton
Setting Procedure
1. Turn the water heater off by pressing the Power On/Off Button on the remote controller.
2. Disconnect, then reconnect electrical power to the water heater.
3. Press the MENU Button inside the cover, select "Initial settings" using the ▲/▼ Buttons.
4. Press the ENTER button, the "Initial settings" screen appears on the display.
5. Select "[°F / gal] <----> [°C / L]" using the ▲/▼ Buttons.
6. Press the ENTER Button and select either [°F / gal] or [°C / L] using the ▲/▼ Buttons.
7. Press the ENTER Button, "Set complete Please wait..." appears on the display for 5seconds and
then the "Initial settings" screen appears on the display.
8. To confirm the setting, turn the water heater on by pressing the Power On/Off Button on the remote
controller.
33