Geyserwise Delta T is used as a timer and differential control for 220V pumped Solar Water Heating Systems.

• 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 system.

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 cut out 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.