Geyserwise Delta T Digital controller

R1,121.25 inc VAT

The Geyserwise Delta T model is designed for the compatible use with a 220V circulation pump and stand alone use for geyser timing purposes.

With 2 probes, it check the temperature in both the solar collector and geyser, then communicating to the circulation pump to make it circulate the water when heating is necessary.


GeyserWise Delta T 220V functionality

Use as timer and differential control on pumped solar system:

  • Clear display of water temperature, time, day, heating mode and malfunction conditions on solar system and geyser
  • Auto or manual heating
  • Easy temperature setting to your requirements (30 - 65°C) factory default is 55°C
  • Four different temperature settings
  • Daily programmable timer with four time settings
  • Error conditions alert by warning code E2 to E5 and E7 to E9
  • Electronic thermostat with mechanical thermal cut-out at 90°C
  • Please note the cut-out temperature for systems expected to reach temperatures above this temperature
  • Differential controller 220V pumped solar systems


Technical parameters

  • Operating voltage 230VAC / 50HZ
  • Main relay contact rating 20AMP (Max 4KW)
  • Secondary relays pump 5Amp
  • Operating voltage range 160V - 250V AC
  • Temperature display range 0 - 200°C (“-5” when below -5°C “EA” )
  • High temperature warning above 85°C
  • Temperature setting ranges 30 - 65°C (heating water electrically)
  • Heat failure - when increase at a rate of less than 4°C per hour
  • Electronic thermostat with mechanical thermal cutout at 90°C
  • Dry heat detection - empty cylinder
  • Temperature tolerance ± 2%. Temperature differential setting 1°C
  • Switching differential 6°C
  • 2nd temperature probe for solar
  • Solar differential setting range 7°C - 15°C
  • Temperature probe failure detection for both collector and tank
  • Temperature probe range for geyser is -30 to + 130°C
  • Temperature probe range for collector is -30 to + 260°C
  • Isolate L when in off state
  • Collector antifreeze protection setting range 0 - 10°C

Downloadable documents:




Product Enquiry

Additional information

Weight 4 kg
Dimensions 150 × 150 × 80 mm

Prices are subject to change with no prior notice. Subject to availability. Images are for display purposes and may vary slightly in appearance.


Standard delivery rates will apply for deliveries to anywhere in South Africa. Delivery dates will be determined by supplier capability.


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