Siddons Solarstream MAHRW010ZAB-270, Owner'S Manual

11

8. OPERATION & ADJUSTMENT OF THE DIGITAL CONTROLLER

Caution

: 

Alteration of the Digital Controller s programming and settings without authorisation from Siddons
 may void your warranty.

This following section is provided ONLY for qualified technicians to assist in servicing, 
repairs or trouble shooting.

7.6 Flushing of the Water Storage Tank

As with other hot water heater tanks, dissolved solids in the water or scale may accumulate in the 
bottom of the water tank forming sludge. This is generally less of a problem with your Solarstream 
because  no internal elements or burners are used.

However, if such sludge does build up, the following procedure can be followed to clean out the tank:
1) Turn Off power to the unit.
2) Turn Off water supply to the unit.
3) Remove the blanking plug (brass fitting) from the unused inlet (normally on the right hand side 
    for left hand connected tanks). The inlets are at the bottom of the tank about 300mm up from 
    the base. 
4) Remove the blanking plug from the unused hot water outlet (normally on the right hand side for 
    left hand connected tanks). The outlets are at the top of the tank. 
5) Allow the water to drain from tank, while the water is draining, a non-metallic rod may be inserted 
    through the open cold-water inlet and used to break up any sludge and assist in its removal. 
6) Turn the cold water supply back on whilst the tank is emptying or after the tank has drained and 
    continue with mechanical agitation to further assist the removal of the sludge.

7.5 Thermal Overload (Incorporated into Digital Controller) 

All models are fitted with a digital controller for heat pump management. One function of the 
digital controller is to initiate a shut down and lockout if the compressor reaches a temperature 
of 105 degrees C. The heat pump will not automatically restart from this. Turning the power off 
then back on perform a reset operation.

7.4 Adding an Expansion Control Valve (ECV) 

In areas with mineralised water causing a high incidence of mineral deposits from the hot water, 
an Expansion Control Valve (ECV) should be installed allowing cold water to be discharged rather 
than hot water during the heating cycle. We recommend this to be installed. If in doubt, check 
with your plumber; refer to Section 4.5.

SIDDONS

AIR TO WATER HEAT PUMP WATER HEATER

AIR TO WATER HEAT PUMP WATER HEATER