I W H

Instantaneous Water Heater

1. Armstrong ( I W H )
• Instantaneous Water Heaters (IWH) are a safer, more cost effective approach to domestic hot water heating than traditional storage tanks. The IWH units are available in a wide range of sizes and can be configured with either a basic or an enhanced controller. The IWH is ideal for schools, hospitals, hotels, commercial buildings, apartments, condominiums, institutional facilities, nursing homes and process applications. The Armstrong IWH unit can operate with dedicated hot water boilers, or can be combined with space heating boiler systems. Whatever your application, an Armstrong IWH unit can meet your needs. Armstrong IWH packaged systems provide hot water instantaneously. Unlike storage tank approaches, water is heated on demand as it flows through the system. Where a hot water storage tank
  
  The IWH is ideal for schools, hospitals, hotels, commercial buildings, apartments, condominiums, institutional facilities, nursing homes and process applications. The Armstrong IWH unit can operate with dedicated hot water boilers, or can be combined with space heating boiler systems. Whatever your application, an Armstrong IWH unit can meet your needs. Armstrong IWH packaged systems provide hot water instantaneously. Unlike storage tank approaches, water is heated on demand as it flows through the system. Where a hot water storage tank may become depleted during periods of peak demand and then require time for re-heating, a properly sized IWH unit can supply hot water at peak demand without any recovery period.

1. The basic IWH packaged system ships completely assembled on a compact common base-plate, that can be maneuvered through the average mechanical room door. The basic system includes.
• Plate & Frame heat exchanger
• Boiler side pressurizing pump to supply the heat exchanger
• Temperature controller
• 3-way motorized control valve
• High temperature safety shut off aquastat
• Temperature sensor on the hot water supply
• The unit is shipped fully assembled with factory default settings programmed into the controller. For installation the unit requires mechanical plumbing connections for hot water supply, cold boiler return, municipal water supply, domestic recirculation, domestic hot water supply lines, and an electrical supply connection. Once installed and energized the system is ready to supply hot water.

1. Armstrong also provides the option for an enhanced IWH packaged system that includes these additional features.
• Built-in recirculation pump
• 5 additional temperature sensors
• Feed-forward controller for more accurate temperature control
• Communications interface compatible with BAS networks
• Capacity for installation in a 'master-slave' configuration to sequence parallel IWH units
• Smart, energy-saving sleep mode
• Energy-saving night-time temperature setback
• Isolation shut-off valves at all piping connections

• The enhanced IWH packaged system provides more precise temperature control to address boiler supply temperature transients, and offers extra features to deliver increased energy savings.

• The IWH sets a new standard for domestic hot water heating. When compared with traditional approaches to hot water heating, an IWH saves from 30% to 80% of the floor space required by a storage tank system. In addition, because the IWH system does not store heated water, it greatly reduces the health risks of Legionella bacteria that are associated with storage tanks. The Armstrong IWH is a great solution for domestic hot water that provides uninterrupted supply, saves energy, saves installation time and reduces first cost.