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 Specification DGX200 DGX250
Type Indoor, Wall hung, Fully condensing Indoor, Wall hung, Fully condensing
Fuel Preset for NG / LP convertible Preset for NG / LP convertible
Minimum / Maximum Input (Btu/h) 30,000 / 199,950 30,000 / 250,000
Combustion Efficiency 98% 98%
Thermal Efficiency 94% 92%
Energy Factor 0.93 N/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) 90 90
Water Inlet / Outlet Connection 3/4" NPT 3/4" NPT
Gas Inlet Connection 3/4" NPT 3/4" NPT
Minimum Flow Rate 0.6 GPM 0.6 GPM
Ignition Electronic Spark Ignition Electronic Spark Ignition
Venting Type Direct Vent (2 pipe - intake & exhaust), Power vent (1 pipe - exhaust only) Direct Vent (2 pipe - intake & exhaust), Power vent (1 pipe - exhaust only)
Venting Materials Sch. 40 PVC, Sch. 40 CPVC, Polypropylene, Stainless Steel Sch. 40 PVC, Sch. 40 CPVC, Polypropylene, Stainless Steel
Max 3" Vent Length - Single Pipe / Power Vent 200 ft, deduct 5 ft per 90° elbow 130 ft, deduct 5 ft per 90° elbow
Max 3" Vent Length - Two pipe / Direct Vent 100 ft, deduct 5 ft per 90° elbow 65 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° elbow N/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° elbow N/A
Common Venting Yes Yes
Safety Features Flame 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 Flame 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 / 150 30 / 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 Pressure 14" 14"
Gas Pressure for Adjustments 8" for NG, 11" for LP 8" for NG, 11" for LP
Electrical 120V AC, 60 Hz 120V AC, 60 Hz
Power Consumption 500W (Max 4.2 Amps), 8W (Standby) 500W (Max 4.2 Amps), 8W (Standby)
Features DGX200 DGX250
Cascading Masterless, 10 units Masterless, 10 units
Heat Exchanger Expandable, 316L Stainless Steel Expandable, 316L Stainless Steel
Certifications DGX200 DGX250
Energy Star Listed Yes No
SQAQMD Certified 2012 Low Nox Yes No
ETL Listed (A NZI Z21.10.3) Yes Yes
Performance DGX200 DGX250
Hot Water Capacity (60°F Rise) 6.2 GPM 7.7 GPM
Hot Water Capacity (80°F Rise) 4.6 GPM 5.8 GPM
Hot Water Capacity (100°F Rise) 3.7 GPM 4.6 GPM
Commercial Mode Temp. Setting Range 100 - 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 Connections Top Connections
Description Specifications ²
Gas Supply Inlet Connection 3/4" Male NPT
Water Supply Inlet Connection 3/4" Female NPT
Heated Water Outlet Connection 3/4" Female NPT
Exhaust Gas Vent 3" O.D. PVC Schedule 40
Fresh Air Intake 3" O.D. PVC Schedule 40
Bottom Connections Bottom Connections
Description Specifications ¹
Drain Connection 1/8" Female NPT (optional)
Condensate Drain Connection 3/4" Nipple (3/4" flex hose)
Power Supply 120V 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.
Warranty Commercial - Heat Exchanger coil - 5 year, Parts - 3 years, Labor - 1 year
Outline Dimensions
Venting
Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table Hubbell Maximum Vent Length Table
Number of units Venting Type Duct Size 2" 3" 3" 4" 4" 6" 6" 8" 8"
Number of units Venting Type btu/h
Input
DGX
200
DGX
200
DGX
250
DGX
200
DGX
250
DGX
200
DGX
250
DGX
200
DGX
250
1 1 pipe - PV 26 200 130 200 130
1 2 pipe - DV 21 100 65 100 65
2 1 pipe - PV 100 65
2 2 pipe - DV 100 65
3 1 pipe - PV 100 30 200 130
3 2 pipe - DV 50 30 100 65
4 1 pipe - PV 200 130
4 2 pipe - DV 100 65
5 1 pipe - PV 200 130
5 2 pipe - DV 100 65
6 1 pipe - PV 200 130
6 2 pipe - DV 100 65
7 1 pipe - PV 150 45
7 2 pipe - DV 75 45
8 1 pipe - PV 100 30 200 130
8 2 pipe - DV 50 30 100 65
10 1 pipe - PV 200 130
10 2 pipe - DV 100 65
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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