Noritz NC1991-DVC User Manual
Model NC1991 Series
Commercial Water Heater
Specification Sheet
Job Name _______________________________________________________________________
Location ________________________________________________________________________
Architect/Engineer _______________________________________________________________
Wholesaler ______________________________________________________________________
Contractor ______________________________________________________________________
Model No. _______________________________________________________________________
Gas Type ________________________________________________________________________
No. of Units _____________________ Total BTU/hr Input _________________________________
Flow Rate (GPH) ___________________________________________________________________
Notes
- gas consumption ranges from 16,000 BTUh to
199,900 BTUh
- ANSI Z21.10.3/CSA 4.3 certified design that can
be wall-mounted indoors with a -DVC model or installed outdoors
with an -OD model
- manufactured with commercial grade copper,
25% thicker piping than standard models
- available in Outdoor (-OD) or Concentric Direct Vent
(-DVC) model that requires 5/3 in. Noritz concentric stainless steel pipe
- units can be linked together by using
either the optional 2-unit Quick Connect (#QC-2) or multi-unit
System Controller (#SC-301-6M-EXT) for up to 6 units
- BTU input can range from 16,000 to 1.2 million BTUh
for a 6-unit Multi-System
- 84% efficient for use with natural gas or propane
- includes remote thermostat that can precisely
adjust the output temperature from 100°F to 185°F with the capability
to display temperatures in both °C and °F
- Flame Sensor, Overheat Prevention Device, Lightning
Protection Device, Freeze Protection
DVC Model OD Model
NC1991 - _____
OD (Outdoor Vent)
DVC (Concentric Direct Vent)
Isolation Valves (#IK-WV-200-1)
Pipe Cover
for OD Model (#PC-2S-GRY)
Quick Connect Cord (#QC-2)
6-Unit System Controller (#SC-301-6M-EXT)
- CSA, UPC, NSF, Low NOx Approved by SCAQMD [<14ng/J or 20ppm]
This product complies with California AB 1953 Low Lead Law and section 1417(d)
of the Safe Drinking Water Act
NORITZ AMERICA CORPORATION
11160 Grace Avenue, Fountain Valley, CA 92708 Tel. 1-866-7NORITZ www.noritz.com
CERTIFIED
LOW-LEAD
R
0.4" (10mm)
1.6" (41mm)22.3" (567mm)
0.4" (10mm)
0.4" - 1.8"
4.8"
DVC Model
Temperature
Rise (°F)
Flow Rate
(GPM)
Dimensions
13.8" (350mm)
9.4" (240mm)
0.4" (10mm)
1.1" (28mm)
FLUE COLLAR
13.1" (334mm)
9.9" (252mm)
2.4" (61mm)
3.4" (88mm)
2.4" (60mm)
1.4" (36mm)
13.8"
23.6" (600mm)
1.7" (42mm)
AIR INLET
5.0"
3.1"
13.1"
FLUE COLLAR
AIR INLET
HOT WATER OUTLET (3/4")
WIRING THROUGHWAY
5.7" (146mm)
AIR INLET
2.4" (60mm)
1.4" (36mm)
6.1" (155mm)
HOT WATER OUTLET (3/4")
WIRING THROUGHWAY
5.7" (146mm)
11.0"
SIDE VIEW
1.1"
WIRING THROUGHWAY
WATER DRAIN VALVE
(WATER FILTER)
HOT WATER OUTLET
WATER DRAIN VALVE
FRONT VIEW
BOTTOM VIEW
WIRING THROUGHWAY
(AC120V)
GAS INLET
COLD WATER INLET
DVC Model
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
NC1991 Series
1.8" (45mm)HOT WATER OUTLET
2.2" (55mm)COLD WATER INLET
2.2" (56mm)GAS INLET
Flow Rates
30 40 45 50 60 70 80 90 100 110 120 130 140
9.8 8.4 7.5 6.7 5.6 4.8 4.2 3.7 3.4 3.1 2.8 2.6 2.4
3.1" (79mm)
7.2" (184mm)
6.4" (163mm)
2.0" (50mm)
5.3" (134mm)
(VIEW FROM TOP)
9.5" (241mm)
10.3" (262mm)
DVC Model
9.5" (241mm)
10.3" (262mm)
OD Model
7.8" (199mm)
4.9" (125mm)
COLD WATER INLET (3/4”)
GAS INLET (3/4")
WIRING THROUGHWAY
(AC120V)
6.7" (171mm)
3.8" (97mm)
COLD WATER INLET (3/4")
GAS INLET (3/4")
WIRING THROUGHWAY
(AC120V)
30
25
20
15
10
Pressure Loss (psi)
5
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0
Model Name
Weight
Operating Pressure
Gas Supply Pressure
Water Holding Capacity
Connection
Sizes
Power
Water Inlet
Hot Water Outlet
Gas Inlet
Supply
Consumption NG: 65W LP: 67W Freeze Prevention 161W
Freeze Protection
Temperature Settings
Default Temperature Options
Set temperature: 125°F or higher
(Storage Tank Setting w/ System
Controller: 170~180°F)
°F Mode
°C Mode
°F Mode
°C Mode
Pressure Loss
Set temperature: 120°F or less
(Storage Tank Setting w/ System
Controller: 160°F or less)
Flow Rate (gpm)
60
50
40
30
Ft of Head
20
10
0
Specifications
NC1991-OD
54 (pounds)
15 - 150 psi
NG: 4.0” - 10.5” LP: 8.0” - 14.0”
0.2 Gallon (1.0 L)
3/4"
3/4"
3/4"
120VAC (60Hz), less than 4 amperes
NG: 80W LP: 83W Free ze Preventi on 193W
Outdoor: -4
°F
100-150 °F (In 5°F intervals), 160, 170, 185°F (14 Options)
37-48°C (In 1°C intervals), 50-85°C (In 5°C intervals) (20 Options)
120, 135, 140, 185°F (Default is 120°F)
50, 57, 60, 85°C (Default is 50°C)
NC1991-DVC
58 (pounds)
0.2 Gallon (1.0 L)
Indoor: -30
°F
ut notice.
Rev. 11/13
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