model nr981 series residential tankless water heater ......model nr981 series residential tankless...
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- gas consumption ranges from 16,000 BTUh to 199,900 BTUh
- flow rates from 0.5 gpm up to 9.8 gpm
- ANSI Z21.10.3/CSA 4.3 certified design that can be wall-mounted indoors (-SV and -DVC models only) or installed outdoors with an -OD model
- manufactured with commercial grade copper, 25% thicker piping than standard models
- available in Power Vent (-SV), Outdoor (-OD), or Concentric Direct Vent (-DVC) model that requires either 4” Category III or 5“/3” Noritz concentric stainless steel pipe
- two identical units can be linked together by using the optional Quick Connect Cord (#QC-2) for twice the hot water capacity
- 0.82 (NG) 0.88 (LP) for all NR981 Series models
- 84% efficient for use with natural gas or propane
- includes remote thermostat that can precisely adjust the output temperature from 100°F to 140°F with the capability to display temperatures in both °C and °F
- 6’ power cord is included with -SV and -DVC models (assembly required for SV models)
- Flame Sensor, Overheat Prevention Device, Lightning Protection Device, Freeze Protection
Temperature Lockout, High Elevation Adjustment, Service Reminder Function
- CSA, UPC**, NSF, Low NOx Approved by SCAQMD [<14ng/J or 20ppm],
* Heat Exchanger warranty is maintained at 12 years or 6500 operational hours, whichever occurs first, when used in a single family dwelling in conjunction with a controlled recirculation system (an aquastat being the minimum pump control requirement) in accordance with the Installation Manual. Refer to the Noritz Limited Warranty for complete coverage details** This product complies with California AB 1953 Low Lead Law and Section 1417(d) of the Safe Drinking Water Act
Model NR981 SeriesResidential Tankless Water Heater
Specification Sheet
NORITZ AMERICA CORPORATION11160 Grace Avenue, Fountain Valley, CA 92708 Tel. 1-866-7NORITZ www.noritz.com
SV (Standard Vent)
OD (Outdoor Vent)
NR981 - _____
SV Model OD Model
Recess Box for OD Model (#RB-700-1)
Pipe Cover for SV/OD Model (#PC-2S)
Isolation Valves (#IK-WV-200-1)
DVC Model
DVC (Concentric Direct Vent)
Quick Connect Cord (#QC-2)
Pipe Cover for DVC Model (#PC-5S)
CERTIFIEDR
LOW-LEAD
Rev. 07/15
FROM BOTTOM OF CASEHEIGHT OF EACH FITTING
2.2"GAS INLET
2.2"COLD WATER INLET
1.8"HOT WATER OUTLET
NR981 Series
Specifications
ut notice.
Dimensions
OD Model
Pressure Loss
30 40 45 50 60 70 80 90 100
9.8 8.4 7.5 6.7 5.6 4.8 4.2 3.7 3.4
TemperatureRise (°F)Flow Rate(GPM)
Flow Rates
BOTTOM VIEW
SIDE VIEW
FLUE COLLAR
AIR INLET
5.0" 3.1"
13.1"13.8"
DVC Model
GAS INLET
WIRING THROUGHWAY
WATER DRAIN VALVE(WATER FILTER)
HOT WATER OUTLET
WATER DRAIN VALVE
COLD WATER INLET
(120VAC)WIRING THROUGHWAY
1.6"
3.7"
22.3
"2.
8"
0.4"
9.4"0.4"
1.1"
AIR INLET
13.8"
1.7”
3.4"
9.9" 2.4"13.1"
Flow Rate (gpm)
Pres
sure
Loss
(psi
)
Ft o
f Hea
d
4.8"1.1"
11.1"0.4" - 1.8"
DVC Model
FLUE COLLAR
0
5
10
15
20
25
30
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.00
10
20
30
40
50
60
Set temperature: 125°F or higher
Set temperature: 120°F or less
Water Inlet
Hot Water Outlet
Supply
NG: 65W LP: 67W Freeze Prevention 161WConsumption
Temperature Settings100-140°F (In 5°F intervals) (9 Options)
Default Temperature Options120, 135, 140°F (Default is 120°F)
Connection Sizes
Weight
Water Holding Capacity
Power
Model Name NR981-OD
Freeze Protection Outdoor: -4°F
37-48°C (In 1°C intervals), 50, 55, 60°C (In 5°C intervals) (15 Options)°F Mode
°C Mode°F Mode°C Mode 50, 57, 60°C (Default is 50°C)
Gas Inlet
54 (pounds)
0.5 Gallon (1.8 L)
3/4"
3/4"
120VAC (60Hz), less than 2 amperes
NG: 65W LP: 69W Freeze Prevention 193W
NR981-SV
Indoor: -30°F
3/4"
58 (pounds)
NG: 80W LP: 83W Freeze Prevention 193W
NR981-DVC
Indoor: -30°F
7.2" (
184m
m)
7.8" (
199m
m)4.9
" (12
5mm)
6.4" (
163m
m)3.1
" (79
mm)
9.5" (241mm)
2.4" (60mm)1.4" (36mm)
(VIEW FROM TOP)
HOT WATER OUTLET (3/4")WIRING THROUGHWAY
COLD WATER INLET (3/4”)GAS INLET (3/4")
WIRING THROUGHWAY(AC120V)
5.7" (146mm)10.3" (262mm)
9.5" (241mm)
1.4" (36mm)2.4" (60mm)
6.1" (
155m
m)
5.3" (
134m
m)
2.0" (
50mm
)
6.7" (
171m
m)3.8
" (97
mm)
HOT WATER OUTLET (3/4")
WIRING THROUGHWAY
COLD WATER INLET (3/4")GAS INLET (3/4")
WIRING THROUGHWAY(AC120V)
5.7" (146mm)10.3" (262mm)
DVC Model
SV and OD Models
0.2 Gallon (1.0 L)
Operating Pressure
Gas Supply Pressure NG: 4.0” - 10.5” LP: 8.0” - 14.0”
15 - 150 psi
FRONT VIEW
13.8"
23.6
"
13.1"
AIR INLET
4" FLUE COLLAR