U-Tube Double Wall

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 persified loads and can be fueled using steam.

Packaged with electronic 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+ indirect fired water heater come in three models:

  • Model #SWDW24
  • Model #SWDW45
  • Model #SWDW68

Features and Benefits

Each compact steam-to-water heater utilizes a space-saving, vertical, double wall U-tube heater exchanger specifically designed to insure that no mixing of the steam and domestic water flows can occur without prior warning. Compliant with BOCA, IAPMO and NAPHCC code requirements, all wetted parts are 304 stainless steel, virgin Teflon, copper or copper alloy for longevity.

  • Accurate Temperature Control ±4°F
  • 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

Options and Accessories

PRODUCT OPTIONS

Bare Heater
Heat exchanger only; insulation optional.

Packaged Heater
Shipped completely assembled and ready for immediate hook-up; includes heat exchanger, patented AERCO steam control valve and electronic controls package.


ACCESSORIES

AERCO Digital Mixing Station (ADMS)
If local code mandates use of a mixing valve or for storage tank or two temperature applications with AERCO water heaters, it is recommended to use an AERCO digital mixing station. Lead-free, ASSE 107 certified ADMS is a smart water tempering system that allows temperature controlled distribution of potable hot water throughout the loop. The building automation system (BAS) ready ADMS™ can be configured with strainers, building recirculation pump and Flow/BTU monitor package to allow facilities managers to remotely monitor and control distribution water temperatures along with monitoring of flow and energy consumption.

Air Compressor
Offered with pneumatic valve configurations if building air is unavailable.

Domestic Water Storage Tank
AERCO storage tanks are ASME certified glass-lined pressure vessels designed for use with instantaneous water heaters. When contending with challenging applications they assure consistent hot water service during peak demands. The AERCO storage tanks are available in stratified or accumulator storage configurations.

Steam Traps
Specifically selected for domestic water heating application, these steam traps are ideal for condensate drainage of SWDW installations. Settings for Pressure Relief Valve: Standard: 150 PSIG, 212°F P&T / Contact your local AERCO representative for higher settings


CONTROLS

Communications Gateway
Optional accessory supports integration with BACnet, LonWorks and N2 systems. Available only for heaters equipped with Modbus control board.

Dry Contacts
Optional for remote "High Limit Tripped Status" indication.

Electronic Controls
AERCO's exclusive electronic control system combines a control box assembly with all circuitry, a flow meter installed at the cold water inlet for feed-forward sensing, feedback sensors and voltage regulator. To maintain optimal temperature control, the system utilizes PID algorithms to monitor outlet temperature and change control valve position. Easy-to-use digital displays are protected by clear-cover enclosure which can be locked. The system also includes an overtemp limit switch and water solenoid valve to function as a secondary water relief valve in an over-temperature condition.

Modbus Communications
Optional control board supports remote control and integration via Modbus protocol to Building Automation or Energy Management Software via RS-232 or RS-485 port.

Technical Documents

Controls

Electronic Control Box Layout

pdf 52.55 KB | January 28, 2016

Installation and Piping Drawings

U-Tube Multiple Heaters in Parallel (SD-A-369)

dwg 159.41 KB | May 4, 2016

U-Tube Multiple Heaters in Parallel (SD-A-369)

pdf 31.64 KB | July 14, 2016

U-Tube Multiple Heaters in Parallel with Stratified Storage (SD-A-501)

pdf 54.75 KB | January 26, 2016

U-Tube Multiple Heaters in Parallel with Stratified Storage (SD-A-501)

dwg 366.4 KB | May 4, 2016

U-Tube Single Heater (SD-A-368)

pdf 34.29 KB | January 26, 2016

U-Tube Single Heater (SD-A-368)

dwg 97.13 KB | May 4, 2016

U-Tube Single Heater with Accumulator (SD-A-370)

dwg 152.72 KB | July 14, 2016

U-Tube Single Heater with Accumulator (SD-A-370)

pdf 29.58 KB | July 14, 2016

U-Tube Single Heater with Stratified Storage (SD-A-371)

pdf 56.34 KB | May 26, 2016

U-Tube Single Heater with Stratified Storage (SD-A-371)

dwg 104.31 KB | May 26, 2016

Literature and Performance Data

AERCO Electronic Control Package Technical Data Sheet (ECV)

pdf 416.22 KB | September 2, 2016

AERCO U-Tube Double Wall Technical Data Sheet

pdf 619.79 KB | January 20, 2017

Electronic Control Valve Data Sheet

pdf 352.79 KB | December 14, 2015

Pneumatic Valve Technical Data Sheet

pdf 400.89 KB | January 28, 2016

Operation and Maintenance Manuals (O&M)

All Double-Wall Heat Exchangers (HE-106)

pdf 1.67 MB | January 29, 2016

ECS Retrofit Instructions (SB6-02)

pdf 1.36 MB | January 28, 2016

Electronic Controls System O&M (AC-105) (OMM-0003)

pdf 1.9 MB | December 30, 2016

U-Tube Double-Wall Heaters w/ECS (HE-111) (OMM-0065)

pdf 3.37 MB | August 21, 2017

Product and Component Drawings

Electronic Valve 1-2" Exploded View (PL-A 148)

dwg 476.67 KB | July 15, 2016

Electronic Valve 1-2" Exploded View (PL-A 148)

pdf 126.04 KB | July 15, 2016

Electronic Valve 2.5"- 4" Exploded View (PL-A-149)

pdf 112.51 KB | July 15, 2016

Electronic Valve 2.5"- 4" Exploded View (PL-A-149)

dwg 277.9 KB | July 15, 2016

U-Tube SWDW24 Packaged with 4” Electronic Valve (AP-A-928)

PDF 233.03 KB | October 11, 2016

U-Tube SWDW24 Packaged with 4” Electronic Valve (AP-A-928)

DWG 1.08 MB | October 11, 2016

U-Tube SWDW24 Packaged with Electronic Valve (AP-A-924)

pdf 243.83 KB | October 11, 2016

U-Tube SWDW24 Packaged with Electronic Valve (AP-A-924)

DWG 1.12 MB | October 11, 2016

U-Tube SWDW45 Packaged with Electronic Valve (AP-A-930)

pdf 291.39 KB | October 11, 2016

U-Tube SWDW45 Packaged with Electronic Valve (AP-A-930)

DWG 1.63 MB | October 11, 2016

U-Tube SWDW68 Packaged with Electronic Valve (AP-A-959)

pdf 303.29 KB | October 11, 2016

U-Tube SWDW68 Packaged with Electronic Valve (AP-A-959)

DWG 1.81 MB | October 11, 2016

Sizing and Application Guidelines

Guidelines for On/Off & Solenoid-type fixtures (A707.0)

pdf 150.65 KB | December 14, 2015

Steam Trap Guidelines (A701.1)

pdf 15.86 KB | December 14, 2015

Steam Trap Selection Charts (A701.2)

pdf 23.96 KB | December 14, 2015

SWDW-24 Sizing Charts

pdf 70.35 KB | January 29, 2016

SWDW-45 Sizing Charts

pdf 97.74 KB | January 29, 2016

SWDW-68 Sizing Charts

pdf 93.73 KB | January 29, 2016

Specifications

SWDW Spec with Electronic Control Valve

doc 40.5 KB | January 26, 2016

SWDW Specification with Electronic Control Valve

pdf 48.74 KB | October 11, 2016

Warranty

Double Wall Warranty

pdf 43.62 KB | December 14, 2015

Wiring

Electronic Control Box Wiring Diagram (SD-A-825)

PDF 65.72 KB | December 14, 2015

Electronic Control Box Wiring Diagram (SD-A-825)

DWG 109.71 KB | December 14, 2015

Wiring Diagram (AP-A-1007)

pdf 116.34 KB | December 14, 2015

Wiring Diagram (AP-A-1007)

dwg 246.09 KB | December 14, 2015