Maintenance - Heatrae Sadia SUPREME 220SS Fitting Instructions And User Manual

7.0 COMMISSIONING
7.1 The electronic control system of the Supreme has a self
commissioning and calibration function. Once the heater is
installed and all services have been connected, the unit should
require no further adjustment before use.
7.2 Check that all electrical, water and vent pipe connections have
been made and are secure.
7.3 Replace the bottom cover and secure with the fixing screws. Turn
on water and electrical supply.
7.4 The READY indicator will flash to indicate the unit is in its "self-
commissioning" mode. The water in the unit will not be hot
enough to use at this stage.
7.5 The READY indicator will continue to flash until the unit has
reached boiling and has "self-calibrated". At this point the READY
indicator will remain illuminated. If for any reason the calibration
procedure is interrupted it will restart after a short delay but may
result in the calibrated temperature being too low. If this occurs
switch the electrical supply OFF for several seconds and then
switch ON. The calibration sequence will reset. Wait for the
READY indicator to remain illuminated.
7.6 The unit is now ready to use, however, it is recommended that the
first few fills be drawn off and discarded to ensure the freshness of
the water.
7.7 The tap sealing washer pressure has been already set. If the
tap drips after commissioning adjust the spring tension so that
the handle is just loose. With the handle in the vertical (off
position) remove locking screw, spring washer and security tab;
line up the hole in the plastic tap cap with the hole beneath it
(by gently turning the handle). Insert a short, blunt, M4 screw.
Increase sealing pressure (and loosen handle fit) by turning the
handle clockwise. Remove the 'short, blunt, M4 screw'; position
the handle with the smoothly curved side facing you (pull on
with spring return) and replace tab, washer and screw. Note:
excessive adjustment will dismantle the tap, if heated this
would result in the uncontrollable release of boiling water.
7.8 Check for leaks.
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8.0 MAINTENANCE

NOTE: Maintenance must be carried out by competent persons.
Competent - i.e. trained, experienced, qualified.
Disconnect the electrical supply before removing the covers.
WARNING: electronics control by switching 'N' (neutral), in some
instances neutral terminations will be at 230 volts with respect to
earth.
8.1 The electronic control system of the Supreme has a self-diagnostic
feature which determines if the unit is operating satisfactorily. It
will automatically calibrate for water quality and temperature.
8.2 If steam or boiling water discharges from the vent pipe the
Supreme will switch off. A critical fault would render the unit
unsafe to use and so will deactivate both the element and
solenoid valve.
8.3 The Supreme incorporates an electronic scale conditioning
function which will reduce the rate of scale deposition in hard
water areas. However, some deposits may still occur in the
storage tank; these should be periodically removed.
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