U-Tube Double Wall
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MODEL DW+ TECHNICAL DATA SHEET DW+ INDIRECT FIRED DOUBLE-WALL WATER HEATER The AERCO DW+ water heater is designed to satisfy potable water heating needs in commercial and institutional environments. The packaged system incorporates real-time, load tracking and responsive controls to maintain accurate hot water temperatures under diversified loads and can be fueled using steam or boiler water. Packaged with either electronic or pneumatic controls, the heater maintains outstanding temperature control when operated under constant load conditions with variances held to ±4°F under normal load changes of up to 25% of water heater capacity. An integrated load monitoring system and high turndown control valve deliver accurate temperature control without the need for storage tanks, blending valves or other temperature averaging components. When packaged with the electronic control system, the heater can be remotely monitored and/or fully integrated with BAS software. The DW+ is constructed of double-wall tubing — two distinct, copper tube walls separate the potable water from the heat transfer medium via a vented air gap. This continuous air path is atmospherically vented through a clearly labeled, visible, leak detection port. Unit construction meets all double-wall heat exchanger requirements as set forth by BOCA (National Plumbing Code), IAPMO (Uniform Plumbing Code) and NAPHCC (National Standard Plumbing Code) the three national associations which reference double-wall requirements. All water wetted parts are 304 stainless steel, virgin Teflon, copper or copper alloy – the best materials available for longevity in even the most aggressive potable water supplies. The unit’s semi-instantaneous design (steam or boiler water in tubes and water in shell) is compatible with low or high steam pressures or Low Temperature Boiler Water (LTBW). And installation is easy because of it small footprint (4 ft2) and doorway size. Tight temperature control, low maintenance, longevity and overall reliability make the AERCO DW+ the most logical choice for any commercial or institutional water heating installation. Accurate Temperature Control ±4°F Choice of Electronic or Pneumatic Controls Compact Foot Print <4ft² Fully Modulating Variable Primary Input All Stainless, TFE, Copper or Copper Alloy Wetted Surfaces UL-listed as Doublewall Heat Exchanger for Potable Hot Water Use ASME- B&PV Code Sec. VIII, Div. 1 Stamped *Consult AERCO website or Engineering Manual for complete warranty details. 20-Year Warranty on Pressure Vessel and Integral Demand Anticipator* Supports a Variety of Applications - 5 to 150 PSIG Steam Supply - LTBW: Less than 250°F, 160 PSIG - Set Point Range 50°F to 205°F - Single or Multiple Installation - Ideal for New or Retrofit - ASME Working Pressure Certified -185 PSIG for DW-24 & DW-68 -180 PSIG for DW-4

AVAILABLE OPTIONS Dry contacts for remote “High Limit Tripped Status” indication Pressure Relief Valves set up to 180 PSIG for high rise installations Represented By: WATER HEATERS • BOILERS • PARTS & ACCESSORIES Specifications subject to change. Consult website or AERCO. HE-6 Revised 11/14/10 NJ AERCO INTERNATIONAL, INC. • 159 PARIS AVE. NORTHVALE, N.J. 07647-0128 • (201) 768-2400 • FAX 201-768-7789 www.aerco.com