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4.5.1
Seasonal shutdown
1.
Where the unit may be subject to freezing temperatures, the condenser and the cooling water pipes must be
disconnected and drained of all water. Blow dry air through the condenser; this operation will help to eliminate all water.
Both the condenser that the evaporator is not self-draining. If water remains in the pipes and the heat exchanger, these
can be damaged in case of freezing.
The forced circulation of the antifreeze solution through the water circuit is a sure way to eliminate the risk of freezing.
2.
Care should be taken to prevent the accidental opening of the water circuit shut-off valves.
3.
If you are using a cooling tower and if the water pump is exposed to freezing temperatures, remove the pump drain plug
to prevent the accumulation of water.
4.
Open the compressor switch and remove the fuses. Set the 1/0 manual switch to 0.
5.
To avoid corrosion, clean and paint rusted surfaces.
6.
Clean and drain the water tower on all units operating with a tower. Make sure tower emptying is effective. Follow a
good maintenance program to prevent the formation of lime scale deposits both in the tower in the condenser. Take into
account that the atmospheric air contains many contaminants that increase the need of proper water purification. The
use of untreated water can result in corrosion, erosion, fouling or the formation of algae. We recommend you contact an
expert for reliable water purification.
7.
Remove the condenser heads at least once a year to inspect the pipes and clean if necessary.
Daikin Applied Europe Spa cannot be held liable for damage caused by untreated or improperly
treated water.
4.5.2
Seasonal start up
Annual start up is a good time to assess motor winding ground resistance. A semi-annual check and recording the resistance
value measured keeps track of insulation deterioration. All new units have a resistance over 100 Mega Ohm between each
motor terminal and grounding.
1.
Check and tighten all electrical connections.
2.
The control circuit must be switched off for the entire time.
3.
Replace the cooling tower pump drain plug if it was removed during previous season shutdown.
4.
Install the main fuses (if removed).
5.
Reconnect water lines and refill the circuit. Purge the condenser and check for leaks.
5
SERVICE SCHEDULE
It is important that all systems receive adequate maintenance. The entire system benefits if the system is in good conditions.
The maintenance program must be continuous from first system start: Full inspection must be made after three or four weeks
of normal operation and continue regularly.
Daikin Applied Europe offers a variety of maintenance services through its local Daikin service departments and through a
worldwide service organization and can adapt their services to the customer's needs.
For more information on service availability, contact your Daikin service department.
6
MAINTENANCE SCHEDULE
A. Performance evaluation
B. Motor
• Winding insulation
• Current balance (within 10%)
•
Terminals check (tork, cleaning)
C. Lubrication system
• Oil line temperature
• Oil solenoid operation
• Oil Analysis
• Oil appearance (color and quantity)
• Oil filter change
• Oil (+ filter) replacement (after proper analisys)
D. VVR operation
• Loading VVR:
•
• Unload VVR
Check motor current and record
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