7
2.4 Specifications
• Specifications may be changed without prior notice.
• The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water
temperature.
* Minimum flow rate may change by setting temperature and water temperature.
Item Specification
Model Name NRCB199DV
(GHQ-C3201WX-FF US)
NRCB180DV
(GHQ-C2801WX-FF US)
Type
Installation Indoor / Outdoor Wall mounted
Air Supply / Exhaust Power Vented
Ignition Direct Ignition
Operating Pressure
DHW
15-150 psi
(Recommended 30 psi for maximum performance)
Heating 12-30 psi
Minimum Activation Flow Rate*
Minimum Operating Flow Rate*
0.4 GPM (1.5 L/min)
0.29 GPM (1.1 L/min)
Dimensions (Height) × (Width) × (Depth) 27.0 in. (687 mm) × 18.5 in. (471 mm) × 12.8 in. (325 mm)
Weight 95 lbs. (43 kg)
Water Holding Capacity for DHW 0.37 Gallon (1.4 L)
Pressure Relief Valve
Setting
Heating 30 psi
Connection
Sizes
DHW Cold Water Inlet NPT 3/4 in.
DHW Outlet NPT 3/4 in.
Heating Supply NPT 1 in.
Heating Return NPT 1 in.
Heating Pressure Relief Valve NPT 3/4 in.
Auto Feeder Inlet NPT 1/2 in.
Gas Inlet NPT 3/4 in.
Condensate Drain NPT 1/2 in.
Power
Supply
Supply 120 VAC (60 Hz)
Consumption
NG: 210 W LP: 210 W
Freeze Prevention: 125 W
NG: 200 W LP: 200 W
Freeze Prevention: 125 W
Maximum Current 4 Amps
Materials
Casing
• Front Cover, Side / Top Plate: Hot-dipped zinc-aluminum-
magnesiumalloy-coated steel w/ Polyester Coating
• Back Plate: Hot-dipped zinc-aluminum-magnesiumalloy-coated
steel w/o Coating
• Bottom Plate: Zincified Steel Plate / Polyester Coating
Flue Collar PP
Primary Heat Exchanger Stainless Steel 316L
Secondary Heat Exchanger Stainless Steel 316L
Safety Devices
Flame Rod, High Limit Switch, Lightning Protection Device (ZNR),
Freezing Prevention Device, Fan Rotation Detector
Included Accessories
Anchoring Screws, Wall Mounting Bracket, Outdoor Temperature
Sensor, Anchoring Screws & Anchors for Outdoor Temperature
Sensor
About the Combi Boiler
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