Brochure

174174
INSTANTANEOUS
SEMI-INSTANTANEOUS HWI
WATER HEATERS
A. O. Smith’s HWI Models are
Available for Operation with
Steam or Boiler Water as the
Energy Source.; They are Factory
Assembled with Components Sized,
Piped and Checked at the Factory
Before Shipment; HWI Models are
All Space Saving Vertical Models.
Code Listing: The System Will
Employ an ASME ”U” Code Shell;
Fitted with an ASME “U” Code
3/4” Diameter Copper Tube Heat
Exchanger.
Integral Pump: The HWI System
Will Employ an Integral Bronze
Circulator Pump.
Steam Units - Steam Trim Consists
of Temperature Control Valve, Inlet
and Auxiliary Steam Traps, Inlet and
Auxiliary Strainers, Steam Pressure
Gauge with Siphon, Vacuum
Breaker and Air Vent.
Boiler Units: Boiler Water Trim
Includes Temperature Control Valve
and Boiler Water Temperature
Gauge.
Control Features
• Single Point Wiring – single 120V
connection, controls including integral
circulation
• On/Off switch-allows local On/Off for
service
• Temperature Readout – LED readout of
water temperature
• PID Temperature Control – modulates
electrical control valve
• High Temperature Limit – Closes main valve
under over temperature condition
• Remote Temperature Signal
• 2-Wire RS485 – Communication (MODBUS
or ASCII)