Daikin C10FZXS, Installation, Operation And Maintenance Manual

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Pre-startup checks
General
Once the machine has been installed, use the following procedure to check that is has been done properly:
ATTENTION
Switch off the power supply of the machine before performing any checks.
Since there are dc link electrolytic capacitors inside the VFD, there is voltage downstream of the inverter for several
minutes after the electricity supply has been switched off. Wait at least 10 minutes before working on the unit. In case of
doubt, consult the compressor manual instructions.
Failure to respect these rules (cutting off power and failing to wait) can cause the operator serious harm or even death.
Inspect all the electrical connections to the power circuits and to the compressors including the contactors, fuse carriers
and electrical terminals and check that they are clean and well secured. Even though these checks are carried out at the
factory on every machine that is shipped, vibrations during transportation may loosen some electrical connections.
ATTENTION
Check that the electrical terminals of cables are well tightened. A loose cable can overheat and give rise to problems with
the compressors.
Open discharge, liquid, liquid injection and suction (if installed) valves.
ATTENTION
Do not start up the compressors if the delivery, liquid, liquid injection or suction valves are closed. Failure to open these
valves may cause serious damage to the compressor.
Check the power supply voltage at the general door-block disconnector switch terminals. The power supply voltage must
be the same as that on the nameplate. Maximum allowed tolerance

10%.
Voltage unbalance between the three phases must not exceed

3%.
Fill the water circuit and remove air from the system’s highest point and open the air valve above the evaporator shell.
Remember to close it again after filling. The design pressure on the water side of the evaporator is 10.0 bar. Never
exceed this pressure at any time during the life of the machine.
IMPORTANT
Before putting the machine into operation, clean the water circuit. Dirt, scaling, corrosion residue and other foreign
material can accumulate in the heat exchanger and reduce heat transfer capacity. Pressure drops can also increase,
consequently reducing water flow. Thus, correct water treatment reduces the risk of corrosion, erosion, scaling, etc. The
most appropriate water treatment must be established locally according to the type of installation and local
characteristics of the process water.
The manufacturer is not responsible for damage or bad operation of the apparatus resulting from failure to treat water or
from incorrectly treated water.
Start the water pump and check the water system for any leaks; repair these if necessary. While the water pump is in
operation, adjust the water flow until the design pressure drop for the evaporator is reached.
Switch off the main Q10 door-lock switch on the front door and move the Q12 switch to the On position.
ATTENTION
From this moment onwards, the machine will be under electrical power. Use extreme caution during subsequent
operation.
A lack of attention during subsequent operation may cause serious personal injury.