Acme Engineering Prod. Ltd.

- Model C-520 Series - Electric Hot Water Boilers



Acme electric boilers are economical units that deliver maximum kilowatts in minimum space requirements. Ideal for new boiler applications or as a replacement unit to upgrade existing applications. This model takes up less floor area and fits through smaller openings than oil or gas-fired units. Easy and economical to install, available in sizes from 9 KW to 2600 KW at all common voltages up to 600 V, 3PH.

Pressure vessels are built to ASME Code. National Board or CRN registration are available. Standard design pressure is 1035 kPa (150 PSI). Other higher design pressures are available. Pressure vessels can be in Carbon Steel or Stainless Steels - SS304 or SS316.

ACME boilers are manufactured under rigid progressive quality control. Protection and control sequences are simulated and verified. Unit is factory prewired and mechanically complete and arrives on site ready to operate after main piping and electrical connections are made.

All hot water boilers include the following items:

  • Main lugs for cable supply circuits
  • Individual circuit fusing
  • Magnetic contactors
  • Heating elements
  • 120V control circuits
  • Customer’s external interlock connection
  • High temperature cutoff, manual reset
  • Low water cutoff, electronic
  • Temperature control, electronic
  • Solid state progressive sequencing step control
  • Built to latest standards
  • Temperature sensor
  • Main control on/off switch
  • Pilot light, control power
  • Pressure-temperature gauge (loose)
  • Pressure relief valve
  • Heating elements with incoloy sheathing individually
  • field replaceable (150PSI & 300PSI)
  • Lifting lugs for 36 CWB & 42 CWB Series

These are some of the most frequent optional items. Our engineering staff can provide for many other special requirements:

  • Boiler disconnect switch, door interlocked
  • Terminals for external demand limiting control
  • Manual reset low water cutoff
  • Auxiliary low water cutoff
  • High or low pressure cutoff
  • Pilot lights for individual steps
  • Outdoor reset controls
  • Tactile HMI interface
  • Demand limiting controls
  • Electric door interlocks
  • Ground fault detection with shunt trip or
    disconnect switch or circuit breaker
  • Individual stage toggle switches
  • Voltmeter with phase selector switch
  • Ammeters, one per phase
  • kW indicator
  • Audible and visual alarm circuit


ACME Standard heating elements are incoloy 800 sheathed design for efficient heat transfer, long service life and safety. Each element is rated at 75 W/ for maximum reliability. The elements are individually field replaceable with standard tools which greatly reduces the cost and time required to replace them. Since the size of each element is small in comparison to the total boiler capacity, the loss of a single element does not dramatically affect the boiler operation. As a result, replacement of a defective element can be postponed until a regular maintenance interval.

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