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Alpha SolarSmart 90 - User Instructions
1 DESCRIPTION
The Alpha SolarSmart 90 system is a pre-heat drain back solar collector system which includes a wall mounted 90 litre unvented
cylinder to store water heated by the solar collector. The system must be used in conjunction with an Alpha combination boiler
fitted with the Alpha Solar valve which is supplied with the system.
The SolarSmart 90 system consists of a 90 litre cylinder, a 2.5 m² flat plate drain back solar collector, drain back unit, unvented kit
and solar valve. The 90 litre unvented cylinder is fitted with a pump, control box and temperature sensors. The drain back unit is
fitted with a heat exchanger and pump.
The unvented kit must be fitted in the mains water supply to the cylinder. The kit includes a pressure reducing valve, expansion
vessel, expansion relief valve, check valve and a tundish. The solar valve must be fitted directly to the mains water inlet of the
Alpha combination boiler.
2 USER CONTROLS
Fig. 1 - Solar cylinder controls
The controls of the solar cylinder are able to indicate working modes on the display. The push button provides the means to
operate the cylinder. During normal operation the system can be turned on and off using the button. When the button is held in for
5 seconds the diagnostic mode will be entered. If this has been done, push the button in for 5 seconds or do not touch it for 10
minutes and the display will return to normal operation.
Display shown Display explained
The indicates the operating mode of the solar system, on or off (on or oF).
Note: It is recommended that the system is always left 'ON'.
If oF is shown the solar system is not operating, press the button to change from off to on.
Note: Always leave the system on.
This is the temperature of the domestic hot water (°C) in the solar cylinder.
Note: The Solar cylinder temperature can be between 10°C and approximately 70°C max.
When the system is on and working, the display will alternate between the domestic hot
water temperature (for 4 seconds) and the operating mode (o
n or oF for 2 seconds).
This is the temperature of the domestic hot water in the solar cylinder.
The flashing dot in the right hand corner of the display shows that the drain back unit pump
and cylinder pump are running.
This is the temperature of the domestic hot water in the solar cylinder.
The flashing dot in the middle of the display shows that only the cylinder pump is running.
If flashing fault codes (71 to 84). Contact your Installer or Alpha Helpline, Tel: 0870 3001964
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