17
2.0.2 Start-Up
Instructions
First check:
a)
That the transformer connection matches supply
Voltage.
b)
That the security circuit is closed for unit operation.
Replace the electrical access panel.
Turn on the water supply to the unit.
Close disconnect/circuit breaker feeding supply to the unit.
Close the On/Off switch.
The display (if fitted) will now show the Set-Up procedure.
Follow the procedure by:
-
selecting: the preferred language,
-
Attaching the control PCB to the Display.
-
nominating: the type/quality of the supply water.
-
nominating: the control signal (or Vapac sensor when being
used).
When the control signal has been nominated, the Set-Up will be
entered into the memory. The Set-Up can then be checked by
reading the information menu. If an error has been made, it will be
necessary to go back to the Set-up menu. If no display is fitted the
information is set using the jumpers on the small resistor PCB
1150634, fitted to CR4 of the control PCB.
2.0.3 Commissioning/Start-Up
Once the Set-Up procedure has been completed, the unit is
available to operate according to the requirements of the control
signal.
When starting with an empty cylinder, the VAPANET programme
feeds water in until the water reaches the bottom float switch, when
the contactor(s) switch on powering the elements. Thereafter the
VAPANET system will continuously monitor and control the
conductivity by adjusting the amount of water drained and fed into
the cylinder.
2.0.4
Features of VAPANET Resistance Heater Unit
The VAPANET system of control is designed to adjust the function
to keep the unit operating in the face of changing water quality in
the cylinder and changing electrode condition even if, in an adverse
operational circumstance, this results in some reduction in output
while the situation exists.
Overtemperature protection.
Should the water supply and the float switch fail, an over
temperature cut-out is fitted to the top of the cylinder. If this
operates, the contactor will open, removing the power to the
elements. This cut out must be manually re-set, by pressing the
small button between the electrical connections.
THIS SHOULD ONLY
BE DONE ONCE THE CYLINDER HAS BEEN INSPECTED AND THE
FAULT(S) RECTIFIED.
Foaming protection *
In particular, the VAPANET is designed to prevent the onset of
foaming and to introduce corrective drainage to keep the unit
working.
*Not applicable to units fed with de-ionised/de-mineralised water.
Automatic switch-off
The VAPANET PCB will stop operating in response to extreme fault
conditions identified as:
Drain Fault STOP (no drain function)Feed Fault STOP (water not
reaching cylinder) In each case, the display will show the STOP
condition and a Help Message, the User LED’s on the fascia will
indicate the condition see table on page 16. A warning signal will
be available for remote indication. The STOP condition of a
VAPANET PCB will be cleared via the key pad if a display is fitted
or by pressing the reset button on the fascia – the unit should first
be powered down completely (while the reason for the condition is
diagnosed and rectified).
THIS ACTION SHOULD ONLY BE TAKEN
ONCE THE CAUSE OF THE PROBLEM HAS BEEN ASCERTAINED AND
RECTIFIED.
The transformer is fitted below the stainless steel drain
tray and is accessible by removing the two M4 machine
screws and sliding the cover forwards.
If no security circuit is fitted (i.e. no airflow switch or
high humidity override hygrostat is required) terminals 9
& 10 must be linked.
If no display is fitted, the selections are made by fitting
jumper plugs to the “Configuration PCB” (Part number
1150634). See page 13.
If no display is fitted the “User LED’s” will be the only
indication of a “Fault Condition”. LED 1 (Left hand)
represents cylinder 1 (Left hand when viewed from the
front) and LED 2 (Right hand) represents cylinder 2, if
fitted.
If a fault condition exists, the LED representing the
cylinder which has the fault will glow “Amber” (constant
for drain fault / flashing for feed fault). The unit should
be powered down at the main Isolator once the reason
has been diagnosed, and the problem rectified. When
the power is re-applied, the unit will once again display
a fault indication. To reset the alarm condition the “fault
reset” button should now be pressed (or the “OK” button
on the display keypad should be pressed if a display is
fitted).
