Adey Midi 250 Instalasi dan Servis - Halaman 14
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Halaman Cetak8 MAINTENANCE
8 .11 Routine maintenance & service checks:
Every 6 & 12 months (see service log sheets below) the APU should be
inspected for:-
Damage to the electrical supply cable .
z
Damage to the inlet and outlet flexible hoses .
z
Leakage from the APU or the connecting pipework .
z
Controller log check; fault codes, pump run times, etc .
z
Test unit operation
z
Float valve check
z
Level probe check
z
Water condition check
z
Expansion vessel pre-charge check
z
8 .12 Wiring diagram
There are no user servicable wiring or components inside the controller
assembly . DO NOT remove the retaining screws or the membrane cover over
the display .
BLUE
GREEN/YELLOW
MAIN WINDING
THERMOTRIP
BROWN
CAPACITOR
START WINDING
MOTOR 2
BLUE
GREEN/YELLOW
MAIN WINDING
THERMOTRIP
BROWN
CAPACITOR
2
Fig. 25
L E N
START WINDING
MOTOR 1
1
L E N
BLUE
N
GREEN/YELLOW
230 VAC/1PH/50Hz
E
SUPPLY
BROWN
L
8 .13 Spares
The APU Midi is designed and built to be a reliable and high quality product,
in the event of spares being required, please contact the ADEY Customer Services
team on +44 (0) 1242 546 717 .
HIGH LEVEL
LOW LEVEL
PRESSURE TRANSDUCER
4-20mA, 0 - 10 bar
COMMON
TANK
- +
C L1 L2
1
2
3
4
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8 .14 Long term isolation and restart procedure
If the system is to be shut down for an extended period of time due to
maintainance or system modifications being carried out to the system the
following steps must be taken .
1 . Isolate mains inlet water from the APU Midi .
2 . Isolate the APU Midi from the system and vent excess pressure to drain .
3 . Run the APU to pump excess water from the tank to drain .
4 . Isolate the electrical supply from the APU .
5 . Remove the vent screws on the front of the pumps and allow excess
water to drain . Replace vent screws . See section 6 .26 .
6 . Ensure the pressurisation unit cannot freeze . Damage will occur to the pumps
if this is allowed to happen .
7 . Cover with plastic sheet or cardboard if work is to be conducted close to
the APU .
8 .15 Restart
To ensure the APU is in good working order after a prolonged period of
maintainance the following steps should be taken .
1 . Inspect the APU for signs of damage .
2 . Check APU tank for debris, remove debris and clean tank if needed . Debris
may cause damage to the pumps if it is allowed to be drawn in .
3 . Check pressure vessel pre charge pressures before the system pressure is
increased .
4 . Open the mains water isolating valve allowing the APU tank to fill, and
ensure the fill valve is operating correctly and maintaining the correct
water level .
5 . Check for signs of leakage .
6 . Open the drain valve on the outlet of the APU .
RS 485 modbus
7 . Turn on the mains electrical power and ensure both (if fitted) pumps can
run (use test pump option if needed) and are pumping water to drain .
LOW PRESSURE ALARM N/O
8 . Close the drain valve and allow the APU to build pressure; the pressurisation unit
HIGH PRESSURE ALARM N/O
should turn off as the isolation valve to the system is closed .
COMMON ALARM N/O
9 . Open the APU outlet isolation valve and monitor the APU to ensure there are
BOILER INTERLOCK N/O
no leaks as the system pressure increases .
10 . Check all the pre set values on the APU to ensure they are still suitable for
the system (after maintainance/modification)
9 ENVIRONMENT PROTECTION
Your appliance contains valuable materials which can be recovered or recycled .
At the end of the product's useful life, please leave it at an appropriate local civic waste
collection point .
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