Hubbell Water Heaters -Model DGX DI / RO Gas Tankless Water Heater

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The Hubbell Model DGX is a dependable and trouble-free source for hot water in continuous, cyclical, or variable flow system in a wide range of hot deionized water, RO water and mildly corrosive applications.

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Hubbell Water Heaters
45 Seymour Street
P.O. Box 288
Stratford, CT 06615
Tel: (203) 378-2659
Fax: (203) 378-3593

info@hubbellheaters.com

http://www.hubbellheaters.com/

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Overview


Model DGX DI / RO Gas Tankless Water Heater

The Hubbell Model DGX is a dependable and trouble-free source for hot water in continuous, cyclical, or variable flow system in a wide range of hot deionized water, RO water and mildly corrosive applications. The Hubbell Model DGX is a dependable and trouble-free 316L stainless steel coil which is impervious to the corrosive effects of hot water and provides maximum vessel and longevity. Only the highest quality materials and components are used to ensure reliable operation in even the most demanding application. The DGX Model is ready for immediate installation and service.

When you specify and install a Hubbell DGX, you will have confidence in knowing the owner will be provided with a trouble-free and long lasting source for DI/RO water.


Industrial Grade Construction
  • High grade construction materials provide maximum longevity
  • Packaged with advanced controls for trouble-free installation and operation
Corrosion Resistant
  • All Type 316L stainless steel construction resists corrosion
  • Heating coil is unwelded 316L SS to ensure long operating life
Scalable Manifold Design
  • Up to 10 units with thermistor controller
  • Offers built-in redundant scalable design
  • Scalable design as load increases making it easy to add additional units

How It Works

The Hubbell DGX utlizes a down fire burner through a non-welded all 316L stainless steel heat exchanger with the most advanced features in the tankless industry

Condensing Tankless Configurations

Hubbell condensing tankless water heaters are the ideal solution for water demand up to 2.5 million BTUs. Hubbell units can be daisy chained within minutes through our factory provided manifold system without the need to buy a separate master controller. Each unit automatically recognizes when another unit is brought online or taken offline. Up to 10 units can be common vented.

  • Engineered and built to meet your exact needs
  • Factory integrated system simplifies installation
  • Factory installed components ensure reliable system performance
Contact a Sales Engineer to discuss your Packaged System


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Specifications

Model DGX Water Heater Specifications
Model SpecificationDGX200DGX250
TypeIndoor, Wall hung, Fully condensingIndoor, Wall hung, Fully condensing
FuelPreset for NG / LP convertiblePreset for NG / LP convertible
Minimum / Maximum Input (Btu/h) 30,000 / 199,95030,000 / 250,000
Combustion Efficiency98%98%
Thermal Efficiency94%92%
Energy Factor0.93N/A
Dimensions H x W x D (inches)25.9 x 17.5 x 14.2 (3.7 cu. ft)25.9 x 17.5 x 14.2 (3.7 cu. ft)
Weight (lbs)9090
Water Inlet / Outlet Connection3/4" NPT3/4" NPT
Gas Inlet Connection3/4" NPT3/4" NPT
Minimum Flow Rate0.6 GPM0.6 GPM
IgnitionElectronic Spark IgnitionElectronic Spark Ignition
Venting TypeDirect Vent (2 pipe - intake & exhaust), Power vent (1 pipe - exhaust only)Direct Vent (2 pipe - intake & exhaust), Power vent (1 pipe - exhaust only)
Venting MaterialsSch. 40 PVC, Sch. 40 CPVC, Polypropylene, Stainless SteelSch. 40 PVC, Sch. 40 CPVC, Polypropylene, Stainless Steel
Max 3" Vent Length - Single Pipe / Power Vent200 ft, deduct 5 ft per 90° elbow130 ft, deduct 5 ft per 90° elbow
Max 3" Vent Length - Two pipe / Direct Vent100 ft, deduct 5 ft per 90° elbow65 ft, deduct 5 ft per 90° elebow
Max 2" Vent Length - Single Pipe / Power Vent
(2" not allowed at elevations above 4,000 ft)
26 ft, deduct 5 ft per 90° elbowN/A
Max 2" Vent Length - Two Pipe / Direct Vent
(2" not allowed at elevations above 4,000 ft)
21 ft, deduct 5 ft per 90° elbowN/A
Common VentingYesYes
Safety FeaturesFlame Rod, Thermal Fuse, Overheat Prevention Device, Fan Speed Monitor, Flue Temperature Monitor, Blocked Vent Detector, Water Leak Detector, Water Shut Off Valve, 2X10A Fuse, Dual Flame SensingFlame Rod, Thermal Fuse, Overheat Prevention Device, Fan Speed Monitor, Flue Temperature Monitor, Blocked Vent Detector, Water Leak Detector, Water Shut Off Valve, 2X10A Fuse, Dual Flame Sensing
Water Pressure Min / Max (PSI)30 / 15030 / 150
NG/LP-Minimum Static Gas Pressure 1/2"5" (non-corrugated, black iron)6" (non-corrugated, black iron)
NG/LP-Minimum Static Gas Pressure 3/4"2.5" (non-corrugated, black iron)2.5" (non-corrugated, black iron)
NG/LP-Maximum Static Gas Pressure14"14"
Gas Pressure for Adjustments8" for NG, 11" for LP8" for NG, 11" for LP
Electrical120V AC, 60 Hz120V AC, 60 Hz
Power Consumption500W (Max 4.2 Amps), 8W (Standby)500W (Max 4.2 Amps), 8W (Standby)
FeaturesDGX200DGX250
CascadingMasterless, 10 unitsMasterless, 10 units
Heat ExchangerExpandable, 316L Stainless SteelExpandable, 316L Stainless Steel
CertificationsDGX200DGX250
Energy Star ListedYesNo
SQAQMD Certified 2012 Low NoxYesNo
ETL Listed (A NZI Z21.10.3)YesYes
PerformanceDGX200DGX250
Hot Water Capacity (60°F Rise)6.2 GPM7.7 GPM
Hot Water Capacity (80°F Rise)4.6 GPM5.8 GPM
Hot Water Capacity (100°F Rise)3.7 GPM4.6 GPM
Commercial Mode Temp. Setting Range100 - 185°F (adjustable 1° increments)100 - 185°F (adjustable 1° increments)
Note: Energy Star and SQAQMD Certified 2012 Low Nox on models DGX200 and DGX200P Models
Continuing research results in product improvement; therefore specifications are subject to change without notice. For most updated information, consult the factory directly.
Top ConnectionsTop Connections
DescriptionSpecifications ²
Gas Supply Inlet Connection3/4" Male NPT
Water Supply Inlet Connection3/4" Female NPT
Heated Water Outlet Connection3/4" Female NPT
Exhaust Gas Vent3" O.D. PVC Schedule 40
Fresh Air Intake3" O.D. PVC Schedule 40
Bottom ConnectionsBottom Connections
DescriptionSpecifications ¹
Drain Connection1/8" Female NPT (optional)
Condensate Drain Connection3/4" Nipple (3/4" flex hose)
Power Supply120V AC Power Cord

¹ Requires a 3" or 2" reducer when using 2" venting pipe
² Using sizes other than specified can cause damage to the water heater and will void the warranty.
WarrantyCommercial - Heat Exchanger coil - 5 year, Parts - 3 years, Labor - 1 year
Outline Dimensions
Venting
Hubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length TableHubbell Maximum Vent Length Table
Number of unitsVenting TypeDuct Size2"3"3"4"4"6"6"8"8"
Number of unitsVenting Typebtu/h
Input
DGX
200
DGX
200
DGX
250
DGX
200
DGX
250
DGX
200
DGX
250
DGX
200
DGX
250
11 pipe - PV26200130200130
12 pipe - DV211006510065
21 pipe - PV10065
22 pipe - DV10065
31 pipe - PV10030200130
32 pipe - DV503010065
41 pipe - PV200130
42 pipe - DV10065
51 pipe - PV200130
52 pipe - DV10065
61 pipe - PV200130
62 pipe - DV10065
71 pipe - PV15045
72 pipe - DV7545
81 pipe - PV10030200130
82 pipe - DV503010065
101 pipe - PV200130
102 pipe - DV10065
Note: Reduce the maximum equivalent length above by 5 feet per 90° elbow and by 2 feet per 45° elbow used. Do not exceed the above set limits.
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