Noritz NRC661A-DV User Manual
Model NRC661A Series
Residential Condensing Tankless Water Heater
Specification Sheet
• Standard Input- Gas consumption ranges from 15,000 BTUh to 120,000 BTUh
• Capacity Range- Flow rates from 0.5 GPM up to 6.6 GPM
• Compact Design- ANSI Z21.10.3/CSA 4.3 certified design that can be
wall-mounted outdoors.
• Durable Steel Casing with Polyester Coating
• Venting Options - Available as an Outdoor (requires no venting) or indoor
Direct Vent (-DV) model which includes special plastic flue adapters that are
compatible with both 3” Schedule 40 and 80 PVC/CPVC pipe. The DV model can
be converted to a non-direct vent (SV) model with the use of a conversion Kit
(#SV-CK-3)
• Direct Electronic Ignition
• Energy Factor- 0.95(NG) 0.96(LP)
• Thermal Efficiency - Fully condensing, 93% efficient for use with natural gas or
propane
• Temperature Controls - Includes built in display that can preset the output
temperature to either 120°F, 135°F, or 140°F
• Power Cord Installation Kit - 6’ power cord is included with -DV models only
• Safety Devices- Flame Sensor, Overheat Prevention Device, Lighting Protection
Device, Freeze Protection, Condensate Overfill, Fan Rotation Detector
• Additional Features - Temperature Lockout, High Elevation Adjustment, Built-in
display window
• 12-Year* Limited Heat Exchanger Warranty for Standard Residential Use
• 5-Year Limited Parts Warranty
• 1-Year Reasonable Labor Warranty
• Approvals- CSA, UPC**, NSF, Low NOx Approved by SCAQMD [<14ng/j or
20ppm]
OD Model
NRC661A- ____
OD (Outdoor Vent)
DV (Direct Vent)
Horizontal Hood Termination (#PVT-HL)
3” PVC Termination (#VK3-H-PVC)
Birdscreen for 3” PVC/CPVC (#VT3-PVCS)
Condensate Neutralizer (#NC-1)
Isolation Valves (#IK-WV-200-1(-LF))
SV Conversion Kit (#SV-CK-3)
Outdoor Recess Box (#RB-510)
Remote Controller (#RC-7651M)
Remote Controller Cord (#RC-CORD10)
Remote Controller Cord (#RC-CORD26)
Pipe Cover (#PC-1S)
DV Model
LOW-LEAD
CERTIFIED
R
*12 Years replacement on the heat exchanger when the product is used in a single family dwelling. 3 Years replacement on heat exchanger when the product is used for commercial
capacity, if it is used in other than a single family dwelling, or if the product is supplied with pre-heated or circulated water (an aquastat being the minimum pump control
requirement). 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.
NORITZ AMERICA CORPORATION
11160 Grace Avenue, Fountain Valley, CA 92708 Tel. 1-866-7NORITZ www.noritz.com
Dimensions
0.4" (10mm)
0.8" (21mm)
1.2" (31mm)
22.3" (567mm)
0.4" (10mm)
6.7" (170mm)
3.5" (90mm)
1.1" (28mm)
13.3" (338mm)
WATER DRAIN VALVE
HOT WATER OUTLET
13.8" (350mm)
5.9" (150mm) 4.9" (125mm)
φ3.5" (φ89mm) φ3.5" (φ89mm)
AIR INLET
Temperature
Rise (°F)
Flow Rate
(GPM)
13.1" (334mm)
23.6" (600mm)
(FRONT VIEW)
30
6.6
WATER DRAIN VALVE
FLUE COLLAR
DISPLAY WINDOW
40
5.5
CONDENSATE DRAIN
20.5" (520mm)
Flow Rates
45
4.9
50
4.4
(BOTTOM VIEW)
COLD WATER INLET
13.8" (350mm)
13.1" (334mm)
8.5" (217mm)
(OD MODEL)
60
3.7703.2
WIRING THROUGHWAY
(AC120V)
GAS INLET
WATER DRAIN VALVE
(WATER FILTER)
1.1" (28mm)
2.2" (56mm)1.1" (28mm)
4.1" (103mm)
HOT WATER OUTLET(3/4")
COLD WATER INLET(3/4")
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
CONDENSATE DRAIN
HOT WATER OUTLET
COLD WATER INLET
GAS INLET
80
2.8
90
2.6
3.8" (96mm)
1.2" (31mm)
0.8" (21mm)
1.8" (45mm)
3.4" (87mm)
(VIEW FROM TOP)
11.7" (297mm)
10.0" (253mm)
NRC661A-DV
0.8”(20mm)
1.8”(45mm)
2.3”(58mm)
2.0”(50mm)
100
2.2
CONDENSATE DRAIN(1/2")
GAS INLET(3/4")
1.6" (40mm)
3.8" (97mm)
WIRING THROUGHWAY
NRC661A-OD
0.8”(20mm)
1.8”(45mm)
2.3”(58mm)
2.0”(50mm)
Pressure Loss Characteristics
50
45
40
35
30
25
20
Pressure loss [psi]
15
10
5
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Flow rate [GPM]
110
100
90
80
70
60
50
40
30
20
10
0
Pressure loss [Ft. of head]
Specifications
Model Name
Weight
Water Holding Capacity
Connection
Sizes
Water Inlet
Hot Water Outlet
Gas Inlet
Condensate Drain
Power
Supply
Consumption
NG: 54W LP: 56W Freeze Prevention 139W NG: 43W LP: 42W Freeze Prevention 139W
Freeze Protection
Temperature Settings with
Optional Remote Controller
Default Temperature Options
°F Mode
°C Mode
°F Mode
°C Mode
NRC661A-DV NRC661A-OD
36 (pounds)39 (pounds)
0.2 Gallon (0.9 L)
3/4"
3/4"
1/2"
1/2"
120VAC (60Hz)
Outdoor: -4
°F
Indoor: -30
115-140°F (In 5°F intervals) (6 Options)
46, 47, 48, 50, 55, 60°C (6 Options)
120, 130, 135, 140°F (Default is 120°F)
50, 54, 57, 60°C (Default is 50°C)
°F
ut notice.
Rev.
4/15
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