WATER HEATERS Model DGX DI/RO TANKLESS WATER HEATER ANSI/NSF 5 Optional DI/RO GAS TANKLESS WATER HEATER For Heating Ultrapure / Reverse Osmosis / Deionized Water Available in 199,950 and 250,000 BTU/Hr Sizes Features 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 non-welded 316L SS to ensure long operating life Scalable Manifold Design Up to 10 units without thermistor controller Offers built-in redundant scalable design Scalable design as load increases making it easy to add additional units All 316 L SS Wetted Parts Applications A Reliable Deionized Water Gas Tankless Heater The Hubbell Model DGX is a dependable and trouble-free source for hot water in continous, cyclical, or variable flow systems in a wide range of hot deionized water, RO water and mildly corrosive applications. The Hubbell Model DGX is equipped with a dependable and troublefree all 316L stainless steel coil which is impervious to the corrosive effects of hot water and provides maximum longevity. Industrial Finishing & Cleaning Systems for electronic & fabricated metal parts such as PC Boards, Microchips, Capacitors, Metal Parts, Jewelry, Aerospace Quality Bearings; Cosmetic and Drug Packaging Systems, Glass Products. Ultrasonic Cleaning Systems Water Purification & RO Systems Only the highest quality materials and components are used to ensure reliable operation in even the most demanding applications. The DGX Model is ready for immediate installation and service. When you specify and install a Hubbell Model DGX, you will have confidence in knowing the owner will be provided with a trouble-free and long lasting source for heating DI/RO water.
Corrosive Effects of RO/DI Water Water is a strong solvent; therefore, it carries many invisible substances: minerals, oxygen, nutrients, waste products, pollutants, etc. Pure water will leach out any and every substance that it can dissolve from the substances that it comes into contact with, until its content is homogeneous with its surroundings or the water is saturated with substances so that it can no longer dissolve anymore substances. RO water is aggressive due to the DO (dissolved oxygen) and CO (carbon dioxide) content, which are more aggressive and corrosive than low ph acidic waters. DI water is equally aggressive and highly corrosive and will attack metals including certain types of stainless steel. Neither RO nor DI water should be run through ferrous metal vessels, plumbing, fixtures etc. Doing so will cause irreversible damage but more importantly, the metal will be added to the water. Hubbell understands the damaging effects of RO/DI water and has engineered and manufactured our Gas Tankless units using all 316L stainless steel wetted components made to withstand these corrosive substances. Why Hubbell Gas Tankless Heaters Are Superior? Reliability The Hubbell DGX is designed to provide many years of operation even when heating aggressive water. The entire heater is all 316L stainless steel construction and can be designed, constructed and stamped in conformance to ASME Section VIII. Advanced Construction Provides trouble-free system integration, operation and maintenance. Temperature control is provided by an electronic solid state digital display controller. The controller is fully adjustable from 100-185 F (38-85 C). Our design is scalable from 200,000 BTU/Hr. to 2,500,000 BTU/Hr. Lower Operating Costs By eliminating standby heat loss the Hubbell DGX is an efficient and reliable unit delivering hot water at your desired temperature. The Hubbell DGX significantly reduces operating costs. PG. 2
How It Works The Hubbell DGX utilizes a down fire burner through a non-welded all 316L stainless steel heat exchanger with the most advanced features in the tankless industry. Exhaust Port Freash Air Intake Gas Inlet RO/DI Hot Water Outlet RO/DI Cold Water Inlet Inlet Flow Sensor & Adjustment Valve Overtemp Sensor Final safety check before water leaves unit ensuring proper temperature Detects Flow and temperature Fan Assists with ventilation and fuel mixing Digital Display LED intuative controller W A T E R F L O W Radially Fired Burner Gas/Propane burner 100% modulating Pulse firing for low flow applications Coiled Heat Exchanger 316L Stainless Steel non-welded coil is able to flex throughout the heating cycle providing longer service life 120 VAC Power Cord Power 120 Volt (10 amps) Condensate Drain All Wetted Surfaces to be 316 L SS PG. 3
VENTING Number of units Venting Type Additional Technical Information Hubbell Maximum Vent Length Table Duct 2'' 3'' 4'' 6'' 8'' Size btu/h DGX Input 200 DGX 200 DGX 250 DGX 200 DGX 250 DGX 200 DGX 250 DGX 200 DGX 250 1 pipe - PV 26 200 130 200 130 1 2 pipe - DV 21 100 65 100 65 2 1 pipe - PV 100 30 200 130 3 2 pipe - DV 50 30 100 65 4 5 6 1 pipe - PV 150 45 7 2 pipe - DV 75 45 1 pipe - PV 100 30 200 130 8 2 pipe - DV 50 30 100 65 10 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. GPM 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Flow Rates at Various Temperature Rises DGX200 DGX250 30 40 50 60 70 80 90 100 110 120 130 140 Temperature Rise t (0 F) 60.0 PRESSURE DROP CURVES 25.0 50.0 DGX250 20.0 Pressure Drop [H (ft)] 40.0 30.0 20.0 10.0 15.0 10.0 5.0 Pressure Drop (psi) 0.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0-10.0 Flow [GPM] -5.0 Due to its efficient design, The Hubbell model DGX DI/RO water heater produces condensate (water) as a normal by-product. This condensate is acidic, with a ph level between 3 and 4. Local building codes may require an in-line neutralizer to be installed (not included) to treat this water. 1. Connect 3/4 I.D. flexible drain line (2) to the condensate nipple located on the of the unit. Tighten hose clamp (1). 1 3 2. Local building codes may require an in-line neutralizer (3) to be installed (not included) to treat the condensate. 4 2 3. Route the drain line to the floor drain (5), or condensate pump (4). 5 PG. 4
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 2" R.F. ANSI FLANGE C.W. INLET 107" APPROX. OVERALL LENGTH 2" R.F. ANSI FLANGE H.W. OUTLET 17 7 16 " APPROX. OVERALL DEPTH SUPER-STRUT WALL MOUNT FRAME 3/4" T&P RELIEF VALVE BLOW DOWN PIPE (4X) DGX MODEL DI/RO GAS TANKLESS WATER HEATER (4X) PG. 5
Dimensional Specification Front View Top View 17 ½" 3 ¼" 6 " Exhaust Port 3" PVC Digital Display 2 ¾" 11 ½" 5 " Fresh Air Intake 3" PVC 2" 3 ½" 26" 6 ¾" RO/DI Cold Water Inlet 3/4" NPT RO/DI Hot Water Outlet 3/4" NPT 4" 1 " 12 " 17 ½" Bottom Mounting Bracket Side View Mounting Wall Surface Bottom View 14 ¼" 13 " 1 " 2 ½" Gas Inlet 3/4" NPT Hot Water Outlet 3/4" NPT 4 " 7 ¼" 2 ¼" 2 ¼" 3 ¾" Right Side Left Side Power Cord 120 VAC Exhaust Port 3" PVC Top Mounting Bracket TYPICAL CONFIGURATION FOR T & P QUICK & EASY 3 PVC CONNECTIONS 3" Pipe 6" 4 ¼" 2 " PG. 6 Power Cord Condensate Drain T&P Relief Valve (if required) 3 CPVC Polypropylene Connections
Model DGX - RO/DI Water Heater Specification MODEL SPECIFICATION DGX200 DGX250 Type Fuel Indoor, Wall hung, Fully Condensing Preset for NG / LP convertible Minimum / Maximum Input (Btu/h) 30,000 / 199,950 30,000 / 250,000 Combustion efficiency 98% Thermal Efficiency Energy factor 94% 0.93 92% N/A Dimensions H X W X D (inches) 25.9 X 17.5 X 14.2 (3.7 cu. ft) Weight (lbs) 90 90 Water Inlet / Outlet Connection Gas Inlet Connection Minmum Flow Rate Ignition Venting Type Venting Materials 3/4" NPT 3/4" NPT 0.6 GPM Electronic Spark Ignition Direct Vent (2 pipe - intake & exhaust), Power vent (1 pipe - exhaust only) 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 elbow Max 2 Vent Length - Single Pipe / Power Vent (2 not allowed at elevations above 4,000 ft) Max 2 Vent Length - Two Pipe / Direct Vent (2 not allowed at elevations above 4,000 ft) Common Venting Safety Features Water Pressure Min / Max (PSI) 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" NG/LP - Maximum Static Gas Pressure Gas Pressure for Adjustments Electrical Power Consumption F eatures 2.5" (non-corrugated, black iron) 14 8" for NG, 11" for LP 120V AC, 60 Hz 500W (Max 4.2 Amps), 8W (Standby) DGX200 DGX250 Cascading Heat exchanger 26 ft, deduct 5 ft per 90 elbow 21 ft, deduct 5 ft per 90 elbow 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 Masterless, 10 units Expandable, 316L Stainless Steel N/A Certifications DGX200 DGX250 Energy Star Listed SQAQMD Certified 2012 Low Nox ETL Listed (A NZI Z21.10.3) No No Perform ance DGX200 DGX250 Hot Water Capacity (60 F Rise) Hot Water Capacity (80 F Rise) Hot Water Capacity (100 F Rise) 6.2 GPM 4.6 GPM 3.7 GPM 7.7 GPM 5.8 GPM 4.6 GPM Commercial Mode Temp. Setting Range 100 185 F (adjustable 1 increments) Top Connections Description Specification 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 1 Fresh Air Intake 3 O.D. PVC Schedule 40 1 Bottom Connections Description Specification 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 to 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. W arranty Commercial - Heat Exchanger coil 5 years, Parts 3 years, Labor 1 year Note: Energy Star and SQAQMD Certified 2012 Low Nox on model DGX200 Continuing research results in product improvement; therefore specifications are subject to change without notice. For the most updated information, consult the factory directly. PG. 7
[Rev C] MASTER SPECIFICATION MODEL DGX JOB NAME: REPRESENTATIVE: ENGINEER: CONTRACTOR: GENERAL Provide a quantity of high efficiency condensing gas tankless RO/DI water heater(s) Model No. as provided by HUBBELL Electric Heater Co., Stratford, CT. The entire unit is to be packaged ready for water, gas and electrical service connections and shall bear the ETL listing mark certifying the entire unit for the US and Canada. CONSTRUCTION The heat exchanger shall be a free-floating non-welded 316L stainless steel finned tube design. The heater shall provide hot water at flow rates as low as 0.6 GPM. An advanced LED multi-function display provides temperature control. Heaters that require greater than 0.6 GPM to activate shall not be acceptable. Heater to be Ultra low NOx certified by SCAQMD and will include an over temp sensor in the exhaust port, capable of first turning down, then turning off the heater if the flue gas reaches an over temperature condition. The heater is to be rated for a maximum allowable working pressure of 150psi. A factory provided ASME rated combination temperature and pressure safety relief valve set at 150psi and 210 F provides protection for the heater and is to be installed in the hot water piping. Heater shall be designed and assembled in the USA. (Optional Specifications: ASME stamped heat exchanger) RECOVERY The recovery section shall be rated at mbtu/hr which will heat GPM of water F rise. ELECTRICAL The electrical power required for the water heater is 120V AC at 60 Hz. The Hubbell water heater has a 60 inch power cord equipped with a GFI three-prong plug. The unit should be plugged into a properly grounded outlet rated for at least 10 Amps (12 gauge wire with a minimum of a 10 Amp circuit breaker. In addition, the Condensing Gas tankless water heater shall be supplied with the following optional features: Option Option Option WARRANTY The heater manufacturer shall warranty all internal components against defects in workmanship and material for a period of three (3) years from date of start-up, and the heat exchanger for a full five (5) years Non Pro-Rated from date of start-up, provided that the unit is started within three (3) months of date of shipment and installed and operated within the scope of the vessel design and operating capability. Each water heater shall be shipped with a complete set of installation and operating instructions including spare parts list and approved drawings. WATER HEATERS TM P.O. Box 288 Stratford, CT 06615 Tel: 203-378-2659 Fax: 203-378-3593 email: info@hubbellheaters.com www.hubbellheaters.com