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Specifications
Item
Model Name
Type
Installation
Air Supply/Exhaust
Ignition
Operating Pressure
Minimum Flow Rate
Dimensions (Height) x (Width) x (Depth)
Weight
Water Holding Capacity
Connection Sizes
Water Inlet
Hot Water Outlet
Gas Inlet
Condensate Drain
Power Supply
Supply
Consumption
Materials
Casing
Flue Collar
Primary Heat Exchanger
Secondary Heat Exchanger
Safety Devices
Accessories
Item
Gas
Consumption
Maximum Hot Water Capacity
Capacity Range
Default Temperature Options
Temperature Settings
(Using the optional
remote controller)
32
Specifications
Indoor Wall Mounted
23.6" (600mm) x 13.8" (350mm) x 6.7" (170mm)
NG : 54W
Freeze Prevention 138W
Flame Rod, Thermal Fuse, Lightning Protection Device (ZNR),
Overheat Prevention Device, Freezing Prevention Device,
Performance
Maximum Performance
NG
LP
45°F (25°C) Rise
°F Mode:
°C Mode:
• Specifications may be changed without prior notice.
• The capacity may differ slightly, depending on the water pressure,
water supply, piping conditions, and water temperature.
Specification
NRC661-DV
Power Vented
Direct Ignition
15-150 psi
0.5 GPM (2 L/min.)
39 lbs.
0.2 Gallon (0.9L)
NPT 3/4"
NPT 3/4"
NPT 1/2"
1/2" Threaded
120 VAC (60Hz)
LP : 56W
Zincified Steel Plate/Polyester Coating
PVC
Copper Sheeting, Copper Tubing
Stainless Steel Sheeting, Stainless Steel Tubing
Fan Rotation Detector
Anchoring Screws
120,000 btuh
120,000 btuh
4.9 GPM (18.7 L/min.)
0.5-6.6 GPM (2-25.0 L/min.)
120°F (50°C), 135°F (57°C), 140°F (60°C)
(Original is 120°F (50°C))
100-140°F (In 5°F intervals) (9 Options)
37-48°C (In 1°C intervals),
50,55,60°C (In 5°C intervals) (15 Options)
NRC661-OD
Outdoor Wall Mounted
20.5" (520mm) x 13.8" (350mm) x 6.7" (170mm)
36 lbs.
NG : 43W
LP : 42W
Freeze Prevention 139W
Stainless Steel
Minimum Performance
15,000 btuh
15,000 btuh
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