B-100 Swimming Pool Heater

  • Designed for large domestic & commercial pools 
  • Available in 18-kW ~ 72-kW 
  • Digital Control Thermostat & Water Temperature Display 
  • Dual Siemens Contactors per element bank
£0 GBP
  • Robust, durable construction
  • Easy to install
  • Safe and reliable operation
  • Low element Watts density (W/cm²) reduces encrustation
  • Titanium or Incoloy 825 heating elements
  • BS 316L Stainless Steel flow tube
  • Digital water flow signal - no pump interlock required
  • Dual cascade wired Siemens contactors on each element bank
  • Digital timers for staged energisation
  • Digital controls provide more accurate control
  • Easy programming using touch screen
  • Epoxy powder coated aluminium cabinet
  • 100% operational efficiency throughout product life


The Elecro B-100 heater is manufactured from top quality components and material at the Elecro works in Hertfordshire, England.

Construction consists of three flow tubes which are fitted to the uniquely designed manifold mouldings made from specially formulated polymer alloy material. Spiral wound heating elements provide a 'Vortex' water flow, these are positioned equidistantly along each flow tube, providing ultra efficient performance. The low Watts density of the elements guarantees extended life and reliability. The outlet manifold accommodates a flow switch which provides a digital signal to the control board. The inlet manifold is fitted with a titanium temperature detection pocket, fitted with NTC temperature sensor.

The heater is supported by two stainless steel brackets, these together with durable aluminium panels form the aluminium enclosure finished in tough epoxy powder coat paint. The enclosure houses the cascade wired Siemens contactors (2 per element bank), timers and control board.
The heater control panel is on the front of the cabinet containing the indication and fault lights as well as the digital touch control screen. The unit can be floor or horizontally shelf mounted offering the simplest and tidiest of installations, even in limited space.

The B-100 heater can be easily operated using the touch screen control panel. The inlet manifold has been designed to minimise flow imbalance between the flow tubes, greatly reducing the risks of air locking. Safety and equipment protection is provided by the highly reliable flow switch, over temperature protection is provided by the four safety thermal cut outs (auto-reset) and a safety thermal cut out (manual reset).

The digital control board allows accurate control of the pool water temperature thanks to its high precision. The blue digital characters on the touch screen are clearly legible, even in bright sunlight. To reduce voltage drop on start-up, the heater element banks are energised in a staged cascaded sequence, with a time delay between energising each bank.

Heating Elements Incoloy 825 or Titanium
Flow tubes BS 316L Stainless Steel
Cladding panels Moulded aluminium, epoxy powder coated
Contactors Cascade wired, Duel Siemens contactors per element bank
Schneider Electric Logo
Digital Control Thermostat 0ºC > 40ºC (0.5ºC Differential)
Safety Thermal 
55ºC (Manual reset)
Flow Tube Thermal cut-out 60ºC (Auto reset) 1 per flow tube
Enclosure Thermal cut-out 60ºC (Auto reset)
Flow Switch Gold tipped reed switch with Titanium fulcrum pin
Wiring High temperature, silicone sheathed, multi-strand copper conductors
Seals High temperature special formula EPDM
Water Connections 63-mm Spigot, supplied with 2" unions
Working Pressure 4 bar maximum
Mounting Floor or horizontal shelf mounting
B-100 380V > 440V 3 Phase Models & Product Codes
Power Output Load (Amp)* Stainless Steel Flow Tubes With Incoloy 825 Heating Elements Stainless Steel Flow Tubes With Titanium Heating Elements Wiring Diagram
18-kW 26 B100-18S B100-18 View
24-kW 35 B100-24S B100-24 View
30-kW 44 B100-30S B100-30 View
36-kW 52 B100-36S B100-36 View
45-kW 66 B100-45S B100-45 View
54-kW 78 B100-54S B100-54 View
60-kW 87 B100-60S B100-60 View
72-kW 104 B100-72S B100-72 View

*Load shown above is for the most common 400V/415V 3 Phase

B-100 220V/230V 3 Phase Models & Product Codes
Power Output Load (Amp) Stainless Steel Flow Tubes With Incoloy 825 Heating Elements Stainless Steel Flow Tubes With Titanium Heating Elements Wiring Diagram
18-kW 46 B100-18S-D B100-18-D View
24-kW 61 B100-24S-D B100-24-D View
30-kW 76 B100-30S-D B100-30-D View
36-kW 91 B100-36S-D B100-36-D View
45-kW 113 B100-45S-D B100-45-D View
54-kW 136 B100-54S-D B100-54-D View