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5. ELECTRICAL INSTALLATION
WARNING: THIS EQUIPMENT MUST BE EARTHED.
All electrical wiring must be carried out by a competent person and in accordance with the
current
I.E.E. Wiring Regulations.
All pipework should be earthed!
5.1. The sheathed heating elements
- Two parallel 1.2 or 1.5kW 230v 50Hz sheathed heating
elements are pre fitted to the cylinder at the factory. They are wired in accordance with the
instructions given in Figure 4.
5.2. Wiring diagram
a) The power supply to the heater must be via a double pole isolator switch or controller, having
contact separation of at least 3 mm, using 1.5 mm sq. flexible cable, to comply with BS 6141 and
must be fully earthed. In case of an electric problem, check that the wiring follows the diagram
below:
i. The Earth wire is connected to the terminal on the cylinder marked with the earth symbol.
ii. The Live wire is connected to the high temperature cut-out terminal
ii. The Neutral wire is connected to the high temperature cut-out terminal
Figure 4
WARNING: DO NOT SWITCH ON THE ELECTRICITY SUPPLY UNTIL INSTRUCTED TO DO SO IN THE
COMMISSIONING PROCEDURE AND ONCE THE UNIT IS FULL OF WATER.
