COMMISSIONING
The following procedure is used for checking initially that the equipment is operating
correctly. Water is used as the process fluid.
The hot water vessel must be filled with softened water of de-mineralised water to
which a small quantity of a conductive salt (eg. 1 gram of potassium bicarbonate) has
been added. This is achieved using the level plug on the rear of the hot water
reservoir. Water can be poured into the vessel through the aperture for the level
conductivity probe until it flows from the level tapping (the probe must, of course, be
removed to allow this).
All numerical references relate to the diagrams in the Description section.
1. When the unit has been assembled and connected to a suitable electrical
supply as detailed in the previous sections, charge the feed tank (5) with
approximately three litres of potable water.
2. Open the flap to the electrical tray, switch the RCD (35) to the ON position.
Switch on the circuit breakers (36). Close the flap.
3. When power is applied, the indicator displays on the control panel will be
illuminated.
(If the control panel displays do not illuminate, check that the emergency stop
switch is not in the stop position).
Check that the temperatures and feed pressure displays all show sensible
values.
4. Set the temperature set point on the temperature controller to 100
o
C. To do
this, press the “F” button to obtain the set point display, then use the raise and
lower buttons to set the desired value. Press “F” to return to the process
variable value (T1) on the display.
Note: The temperature displayed on this controller is the process
variable (T1), which is controlled by the amount of power
being put into the hot water circulator. This must not be
confused with the temperature of the water in the circulator
reservoir, which is displayed separately on the control panel.
Further information on the set up and operation of the electronic controller is
given in the OPERATIONAL PROCEDURES section of this manual. Also, an
instruction manual specific to the controller is supplied with the equipment.
5. Ensure that the back pressure valve (9) is set to give minimum system pressure
by turning the handle fully anti clockwise. The outlet from this valve should
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