Santon Aquaheat AH30V, Installation And User Instructions Manual

14

Warning: disconnect from all electrical supplies before beginning any work on the 

unit. Water contained in the heater may be very hot.

To ensure the continued safe and efficient operation of the unit, it should be 

regularly maintained.

Maintenance should be carried out by a competent person and any replacement 

parts used should be authorised Santon spare parts.

Little maintenance is required, however in hard water areas the unit will require 

periodic descaling to ensure efficient operation. To descale the unit:

6.1   Switch off and disconnect the electrical supply. Turn off the water supply to 

the unit.

6.2   Open a hot tap to relieve any system pressure. Empty unit by opening the 

drain cock in the inlet pipework.

6.3   Remove the terminal cover by using a large flat bladed screwdriver to 

depress the 4 snap lugs located in the 4 rectangular depressions on  the 

bottom cover.

6.4   Disconnect the electrical terminations to the element. Disconnect earth links 

to the earthing stud. Withdraw the thermostat and thermal cut-out capillary 

tubes from the pocket on the element plate.

6.5   Remove the element plate assembly by unscrewing the five securing screws, 

tapped jacking holes are provided (NOTE: a quantity of water may still be 

present in the container, it is recommended that a container be placed under 

the unit to collect any spillage). Remove any loose scale from the container. 

Carefully clean off any scale from the element and thermostat pocket. DO 

NOT clean scale from interior container walls.

6.6   Re-assemble the element plate assembly fitting a new sealing gasket. Rewire 

the unit with reference to the Wiring Diagrams. 

6.7   Re-commission the unit following the INSTALLATION and 

COMMISSIONING instructions.

 6.0 MAINTENANCE