Noritz NCC1991-DV User Manual
Model NCC1991 Series
Commercial Condensing 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
• Standard Input - gas consumption ranges from 16,000 BTUh to
199,900 BTUh
• Compact Design - ANSI Z21.10.3/CSA 4.3 certified design that can
be wall-mounted indoors with a -DV model or installed outdoors
with an -OD model
• Durable Stainless Steel Casing
• Heat Exchanger - manufactured with commercial grade copper,
25% thicker piping than standard models
• Venting Options - available in Outdoor (-OD) or Direct Vent (-DV)
model that can use either Schedule 40 PVC/CPVC
• Direct Electronic Ignition
• Multi-System Capability - units can be linked together by using
either the optional 2-unit Quick Connect or multi-unit System Controller
for up to 24 units.
• Thermal Efficiency - fully condensing, 94% efficient for use with natural
gas and propane
• Temperature Controls - includes remote thermostat that can
precisely adjust the output temperature from 100°F to 185°F
• Safety Devices - Flame Sensor, Overheat Prevention Device,
Lightning Protection Device, Freeze Protection, Neutralizer Overfill
• Five Year Limited Heat Exchanger Warranty for Commercial Use
• Five Year Limited Parts Warranty
• Approvals - 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
LOW-LEAD
CERTIFIED
R
OD Model
Model
NCC1991 - _____
OD (Outdoor Vent)
DV (Direct Vent)
Accessories
Horizontal Hood Termination (#PVT-HL)
3” PVC Termination (#VK3-H-PVC)
Birdscreen for 3” PVC/CPVC (#VT3-PVCS)
Birdscreen for 4” PVC/CPVC (#VT4-PVCS)
Condensate Neutralizer (#NC-1)
Isolation Valves (#IK-WV-200-1)
Pipe Cover (#PC-3S-SUS)
Quick Connect Cord (#QC-2)
SV Conversion Kit (#SV-CK-3)
System Controller
6-unit (#SC-301-6M)
12-unit (#SC-301-12M)
24-unit (#SC-301-24M)
DV Model
NORITZ AMERICA CORPORATION
11160 Grace Avenue, Fountain Valley, CA 92708 Tel. 1-866-7NORITZ www.noritz.com
Dimensions
0.4" (10mm)
1.6" (40mm)
2.4" (61mm)
23.1" (586mm)
0.4" (10mm)
Side View
Temperature
Rise (°F)
Flow Rate
(GPM)
9.4" (240mm)
5.5" (140mm)
8.4" (214mm)
2.4" (60mm)
4.3" (109mm)
(VIEW FROM TOP)
3.9" (98mm)
5.7" (146mm)
14.2" (362mm)
1.1" (29mm)
Ø4.5" (Ø114mm)
Ø3.5" (Ø89mm)
AIR INLET
18.4" (468mm)
17.6" (448mm)
5.9" (150mm) 9.2" (234mm)
Ø4.5" (Ø114mm)
Ø3.5" (Ø89mm)
FLUE COLLAR
18.4" (468mm)
17.6" (448mm)
10.5" (267mm)
4.0" (101mm)
2.5" (63mm)2.1" (53mm)
3.9" (99mm)
2.8" (70mm)
HOT WATER OUTLET (3/4")
CONDENSATE DRAIN (1/2")
6.1" (155mm)
WIRING THROUGHWAY
DV Model
WIRING THOROUGHWAY
CONDENSATE DRAIN
WATER DRAIN VALVE
WATER DRAIN VALVE
(WATER FILTER)
HOT WATER OUTLET
WATER DRAIN VALVE
24.4" (619mm)
BOTTOM VIEW
Front View
(AC120V)
GAS INLET
COLD WATER INLET
OD Model
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
CONDENSATE DRAIN
HOT WATER OUTLET
COLD WATER INLET
NCC1991-OD
0.8" (20 mm)
1.7" (44 mm)
2.2" (55 mm)
2.2" (56 mm)
< inch (mm)>
NCC1991-DV
0.8" (20 mm)
1.7" (44 mm)
2.2" (55 mm)
2.2" (56 mm)GAS INLET
HOT WATER OUTLET (3/4")
CONDENSATE DRAIN (1/2")
WIRING THROUGHWAYS
3.9" (99mm)
2.8" (70mm)
2.4" (60mm)
6.1" (155mm)
4.3" (109mm)
10.0" (255mm)
8.4" (214mm)
3.9" (98mm)
5.7" (146mm)
14.2" (362mm)
OD Model
Flow Rates
30 40 45 50 60 70 80 90 100 110 120 130 140
11.1 9.3 8.4 7.4 6.2 5.3 4.6 4.1 3.7 3.4 3.1 2.9 2.7
5.3" (135mm)
7.0" (177mm)
6.7" (171mm)
GAS INLET (3/4")
COLD WATER INLET (3/4")
WIRING THROUGHWAY
(AC120V)
WIRING THROUGHWAY
(AC120V)
2.8" (71mm)
6.7" (171mm)
7.0" (177mm)
5.3" (135mm)
GAS INLET (3/4")
COLD WATER INLET (3/4")
F or higher
Pressure Loss
Bypass Flow Control Valve Open
Set temperature : 120
(Storage Tank Setting W/ System
Controller : 160
Flow rate [GPM]
F or less)
F or less
60
50
40
30
Pressure loss [Ft. of head]
20
10
0
30
25
Bypass Flow Control Valve Close
20
Set temperature : 125
(Storage Tank Setting W/ System
Controller : 170-185
15
Pressure loss [psi]
10
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 12.0
F)
Specifications
Model Name
Weight
Operating Pressure
Gas Supply Pressure
Water Holding Capacity
Water Inlet
Connection
Sizes
Hot Water Outlet
Gas Inlet
Condensate Drain
Power
Supply
NG: 78W LP: 80W Freeze Pre vention 223W
Freeze Protection
Temperature Settings
Default Temperature Options
°F Mode
°C Mode
°F Mode
°C Mode
NCC1991-OD
66 (pounds)
NCC1991-DV
68 (pounds)
15 - 150 psi
NG: 4.0” - 10.5” LP: 8.0” - 14.0”
0.5 Gallon (2 L)
3/4"
3/4"
3/4"
1/2" Threaded
120VAC (60Hz), less than 4 amperes
NG: 81W LP: 83W Freeze Prevention 223WConsumption
Outdoor: -4
°F
Indoor: -30
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)
°F
ut notice.
Rev. 11/13
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