Indirect Water Heaters

  • Hot water generators available for operation with steam or boiler water
  • Custom units built to order
  • Up to 5,000 gallon capacity

  • Hot water generators are available in space saving vertical or horizontal models
  • Custom units built to order, with tank capacities up to 5,000 gallons, with special control trim, and with special heating units can be built to design specifications on special order basis. Standard units listed in this brochure cover most standard orders
  • All internal surfaces exposed to water are glasslined per ASME HLW procedures, using an NSF 61-approved glasslining compound
  • Glass is highly resistant to effects of temperature, corrosion and electrolysis
  • The HWG systems meet or exceed the thermal efficiency and standby loss requirements of the U. S. Department of Energy and current edition ASHRAE/IESNA 90.1.
  • The standard system will employ an ASME ”HLW” code glasslined storage tank fitted with an ASME “U”code 3/4” diameter copper tube heat exchanger
  • The standard HWG system will employ circulator pump. The heat exchanger sizing tables are also based on using integral circulators
  • Standard HWG consists of ASME HLW Code storage tank rated 125 psig working pressure with U Code heat exchanger, temperature & pressure relief valve, temperature & pressure gauge in tank, drain valve and lifting lugs
  • Standard HWG systems employing glass or optional cement lined, lined tanks are fitted with anodes as corrosion protection
  • Options for boiler water system:
    – Boiler water temperature gauge
    – Standard boiler water trim, includes 2-way temperature inlet y-strainer control valve, isolation valves
  • Options for steam system:
    – Standard steam trim consists of temperature control valve, 1 steam trap on condensate line, inlet and outlet strainers
    – Electric operated valve
    Options for both boiler water and steam system:
    – Electronic control package with BMS integration
    – Electric high limit safety system, three-way controls with bypass. ASME rating
    – Low water cutoff, 12×16 vessel manway, 4×6 vessel hand hole

Sample specification – water to water

The hot water heater generator package shall be A. O. Smith model no. HWG(V) or HWG(H), (ESW) or (EDW) with copper heating coil. The jacketed, insulated storage tank shall be constructed and stamped according to ASME specifications for (125) psi working pressure. The unit shall be designed to recover________ GPH for a temperature of_____degrees F to______ degrees F when supplied with________ GPM boiler water entering temperature regulator at ______degrees F. The heating coil shall be constructed and stamped according to section VIII of ASME code. The tube bundles shall be constructed of 3/4” O.D. 20 GA. deoxidized drawn copper tubing. The unit shall be controlled by one of three means: On-Off valve________, Two Way Valve________, Three Way Modulating Valve________. The unit will be completely factory assembled and furnished with the following standard components. A storage tank ______” dia. x ______” long with ______ gallon capacity. Tank shall be insulated to meet the R12.5 minimum thermal insulation requirements of the U. S. Department of Energy and current edition of ASHRAE/IESNA 90.1. Tank shall be jacketed with heavy gauge steel with a prepaint. Tank shall be built to ASME section lined and furnished with an ASME temperature & pressure relief valve. Heating coil built to Section VIII of ASME code. A temperature regulator to be self actuated, direct acting. A bronze integral circulator pump with copper soldered recirculation line and (two) bronze ball valves. A drain valve and assembly. Optional jacket mounted temperature and pressure gauges, a CSA Certified and ASME Rated T&P relief valve and a full length channel base and lifting lugs.

Sample specification – steam to water

The hot water heater generator package shall be A. O. Smith model no. HWG(V) or HWG(H), (ESS) or (EDS) with copper heating coil. The jacketed, insulated storage tank shall be constructed and stamped according to ASME specifications for (125) psi working pressure. The unit shall be designed to recover ________ GPH for a temperature rise of ________ degrees F to ________ degrees F when supplied with ________ psi steam to the temperature regulator. The heating coil shall be constructed and stamped according to section VIII of ASME code. The tube bundles shall be constructed of 3/4” O.D. 20 GA. deoxidized drawn copper tubing. The unit will be completely factory assembled and furnished with the following standard components. A storage tank ______” dia. x ______”long with ______ gallon capacity. Tank shall be insulated to meet the R12.5 minimum thermal insulation requirements of the U. S. Department of Energy and current edition of ASHRAE/IESNA 90.1. Tank shall be jacketed with heavy gauge steel with a prepaint. Tank shall be built to ASME section IV, glasslined and furnished with an ASME temperature & pressure relief valve. Heating coil built to Section VIII of ASME code. A temperature regulator to be self actuated, direct acting. Main steam trap, main “Y”strainer and associated black steel pipe. A bronze integral circulator pump with copper soldered recirculation line and (two) bronze ball valves. A drain valve and assembly. Optional jacket mounted.

ASME HLW
ASME U Optional
NSF

Our range of indirect fired water heaters

ITS indirect water heater

IT

ITS indirect water heater

ITS

ITE indirect tank

ITE

HWG water heater

HWG

More information?

Please fill in the form below and we will contact you as soon as possible.