Table of Contents
Advertisement
7.0 COMMISSIONING
7.1 Do not switch on the electrical supply until the unit has been filled with water
and checked for leaks.
7.2 Check that all installation and electrical requirements have been met.
7.3 Check that all water and electrical connections are tight.
7.4 Open a hot water tap, if fitted, and turn on cold water supply to the heater.
7.5 Allow unit to fill and leave hot outlet to run for a short while to purge any air and
flush out the pipework. Close the hot tap and check the system for leaks.
7.6 Switch on the electrical supply. The indicator light will illuminate during
heating. When the set temperature is reached the indicator light will go out.
7.7 The set temperature can be adjusted by rotating the knob located in the terminal
cover. It is possible to lock the thermostat knob in either the mid-range or a "hot"
position by following the procedures in 7.9 or 7.10 below. Always switch off the
electrical supply before removing the terminal cover.
7.8 Setting the "mid-range" position:
Rotate the thermostat knob to the mid position. Remove the terminal cover by
using a large flat bladed screwdriver to depress the four snap lugs located in the
four rectangular depressions around the cover. Holding the thermostat knob in
position turn the terminal cover over and remove the backing disc from the
underside of the cover. Turn the backing disc over and refit to the knob ensuring
the notch locates with the boss on the underside of the cover. Refit the terminal
cover, the thermostat will now be locked in the "mid-range" position.
7.9 Setting the "hot" position:
Rotate the thermostat knob to mid way through the hot graduated range (red
graphic). Follow the procedure detailed above, however in this case the knob
should be held in the "hot" position previously set. When the terminal cover has
been refitted the thermostat will be locked in the "hot" position.
8.0 MAINTENANCE - DESCALING
Little maintenance is required, however in hard water areas the unit will require
periodic descaling to ensure efficient operation. To descale the unit:
8.1 Switch off and disconnect the electrical supply. Turn off the water supply to the
unit.
8.2 Open a hot tap, if fitted, to relieve any system pressure. Empty unit by opening
the drain cock in the inlet pipework.
8.3 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.
8
Advertisement
Table of Contents
