Adey Mini 230 Installation und Instandhaltung - Seite 11

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Sets low system pressure alarm. Set in 0 . 0 5 bar increments
P4 Lo Alarm (4)
below the System pressure (2) - Differential pressure
see Fig . 18
(3) - 0 . 0 5 bar . Alarm auto resets when system pressure is
increased above alarm level
Sets number of pumps fitted to APU . 1 or 2 pumps . Factory
P5 Pump number
set to suit model .
Allows pump 1 or 2 to be forced to run for 15 seconds to
confirm operation.
P6 Pump test
Using buttons A or B to select pump 1 or 2, then press button
A or B again to run the pump .
P7 Info.
Displays software revision. No inputs .
6 .19 Pre-set values
The APU will be delivered with the following pre-set values:-
Set Pressure
2 bar
Differential
0 .2 bar
Hi Alarm
2 .5 bar
Lo Alarm
1 . 3 bar
6 .20 Hydraulic commissioning:
Ensure both inlet and outlet hydraulic connections are made and
z
watertight .
Turn on water supply to APU – Check for leakage and operation of fill
z
valve .
Allow the tank to fill and water level to stabilise . Adjust the float of the
z
fill valve to set the water level if needed .
Close isolation valve on the outlet of the APU .
z
Turn the electrical supply ON to the APU . The system pressure will be
z
displayed .
The APU will run briefly and then turn off after a pre-set run on time .
z
Due to the small size of the isolated system the APU will signal a Hi
pressure error and the red error light will illuminate on the front of the
APU, this is normal .
Open the isolation valve on the outlet of the APU and the APU will
z
run and start to top the system up .
6 .21 For further technical support: Phone the ADEY Customer Service team
on +44 (0) 1242 546717 . Our staff are trained to help and advise you over
the phone .
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7 OPERATION

7 .11
Normal operation:
The 'Home' screen will display the status of the system pressure .
Fig . 21
A green 'Power on' light will be displayed on the front of the APU .
During normal operation the APU will monitor the system pressure and re-
pressurise the system if the system pressure drops below the system pressure
– differential pressure . See Fig . 18 .
Example: System pressure 2 bar, differential pressure 0 .5 bar, pump will start
to re-pressurise system at 1 .5 bar system pressure and stop at a system
pressure of 2 bar .
During the normal operation of a pressurised system, the system pressure
will fluctuate due to temperature changes causing expansion and contraction .
When setting the differential pressure for the Hi \ Lo alarms, please ensure
that the normal system pressure fluctuations are below the Hi pressure alarm
setting and above the differential pressure . If this is not done the APU will try
to compensate for the pressure change causing an over pressure within the
system or alarms being triggered .
7 .12 Error and alarm display:
The following errors are shown on the display:
Hi
Pressure monitored by the APU Mini is above the Hi alarm set pressure .
Display will flash between Hi and system pressure and red error light
will illuminate . Pumps will not run in this condition .
Lo
Pressure monitored by the APU Mini is below the Lo alarm set pressure .
Display will flash between Lo and system pressure and red error light will
illuminate . Pumps will run in this condition .
Er
The input signal from the pressure sensor is outside its normal range .
Display will flash Er and red error light will illuminate .
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