Model #SWDW45

Model #SWDW45

45 sq./ft. heat transfer surface

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Advanced Control Package
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Each compact steam-to-water or water-to-water heater utilizes a space-saving, vertical, double wall U-tube heater exchanger specifically designed to insure that no mixing of the primary 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.
Packaged Heater - Shipped completely assembled and ready for immediate hook-up; includes heat exchanger, patented AERCO steam control valve and your choice of electronic or pneumatic controls package.

Bare Heater - Heat exchanger only; insulation optional.
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
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.

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

Pneumatic Controls - AERCO's exclusive Loadalert system continuously monitors water temperature and flow and modulates the flow of steam through the control valve and into the coils. Control panel includes pneumatic controller and dual solenoid valve over-temperature limit system. (One solenoid to disable steam control valve; One solenoid to perform as a secondary water relief valve.) Power on/tripped status lights, liquid-filled remote capillary thermometer and compound steam pressure gauge also included.

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

Controls & Electrical Wiring
File Type View Save File Type View Save
Electronic Control Box Layout .pdf .dwg
Temperature Limiting System            
Wiring Diagram (AP-A-1007) .pdf .dwg
Electronic Valve 1-2" Exploded View (PL-A 148) .pdf
Electronic Valve 2.5"- 4" Exploded View (PL-A-149) .pdf
Literature & Performance Data
File Type View Save File Type View Save
U-Tube Double Wall Technical Data Sheet .pdf
Shell Side Pressure Drop (Packaged w/Electronic valve) .pdf
Shell Side Pressure Drop (Packaged w/Pneumatic Controls) .doc
Electronic Control Package Data Sheet .pdf
Pneumatic Valve Tech Data Sheet .pdf
Electronic Control Valve Data Sheet .pdf
Sizing & Application Guidelines
File Type View Save File Type View Save
Guidelines for On/Off & Solenoid-type fixtures (A707.0) .pdf
SWDW-45 Sizing Charts .pdf
Steam Trap Guidelines (A701.1) .pdf
Sizing Data .pdf
Product & Component Drawings
File Type View Save File Type View Save
Dimensional Drawings            
Packaged with Electronic Control Valve (AP-A-852) .pdf .dwg
Packaged with 2-Way Pneumatic Valve (AP-A-694) .pdf .dwg
Pneumatic Valve 1-2" Exploded View .pdf
Pneumatic Valve 2.5"- 4" Exploded View .pdf
Installation & Piping Drawings
File Type View Save File Type View Save
Single Heater            
Single Heater .pdf .dwg
With Accumulator .pdf .dwg
With Stratified Storage .pdf .dwg
Multiple Heaters in Parallel            
Multiple Heaters in Parallel .pdf .dwg
With Stratified Storage (SD-A-501) .pdf .dwg
File Type View Save File Type View Save
Pneumatic Control Box Layout .pdf .dwg
Electronic Control Box Wiring Diagram (SD-A-825) .pdf .dwg
File Type View Save File Type View Save
Temperature Limiting System            
With Remote Relay Alarm .pdf .dwg
File Type View Save File Type View Save
SWDW Spec with Electronic Control Valve .doc
SWDW Spec with Pneumatic Valve .doc
File Type View Save File Type View Save
Double Wall Warranty .pdf

Operation & Maintenance
File Type View Save File Type View Save
U-Tube Double-Wall Heaters w/ECS (HE-111) .pdf
All Double-Wall Heat Exchangers (HE-106) .pdf
ECS Retrofit Instructions (SB6-02) .pdf
Electronic Controls System O&M (AC-105) .pdf
Pneumatic Temperature Controller (AC-103)
File Type View Save File Type View Save
Diaphragm Replacement (VA-111) .pdf
Adding a Communications Board to ECS (SB6-03) .pdf
ECS and CXT-E Retrofit Instructions (TID-0140) 12-30-14 .pdf
ECS Upgrade for SW Double Wall Heaters (TID-0142) 12-30-14 .pdf
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