Operation manual
5
EWAP110~340MBYNN
Packaged air-cooled water chillers
4PW22677-1
S8L.........................Flowswitch
S9L............. # .........Contact that closes if the pump is working
S10S .......... * .........Changeable switch for remote function
(e.g. dual setpoint)
S11S .......... * .........Changeable switch for remote function
(e.g. enable/disable capacity limitation 1)
S12S .......... * .........Changeable switch for remote function
(e.g. enable/disable capacity limitation 2)
S13S .......... ## .......Main isolator switch
S14PH....................High pressure switch
TC01,TC02.............Optocoupler (analog to digital signal)
TR1 ........................Transfo for control circuit
TR2 ........................Transfo for supply cont digital inputs
V1............... ** ........V-meter
Y11S ......................12% capacity step for compressor
Y15S ......................Liquid injection valve of the compressor
Y16S ......................Liquid line solenoid valve
B
EFORE
OPERATION
Checks before initial start-up
After the installation of the unit, check the following before switching
on the circuit breaker:
1
Field wiring
Make sure that the field wiring between the local supply panel
and the unit has been carried out according to the instructions
described in the installation manual, according to the wiring
diagrams and according to European and national regulations.
2
Additional pump interlock contact
Additional pump interlock contact (S9L) must be provided. Make
sure that the contact has been installed between the appropriate
terminals (refer to the wiring diagram supplied with the unit). The
contact must be a normal open contact.
3
Fuses or protection devices
Check that the fuses or the locally installed protection devices
are of the size and type specified in the installation manual.
Make sure that neither a fuse nor a protection device has been
bypassed.
4
Earth wiring
Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.
5
Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
6
Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
7
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
8
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
9
Oil leak
Check the compressor on oil leakage. If there is an oil leak, call
your local dealer.
10
Stop valves
Open the liquid line, discharge and suction (if provided) stop
valves completely.
11
Air inlet/outlet
Check that the air inlet and outlet of the unit is not obstructed by
paper sheets, cardboard, or any other material.
12
Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
13
Water connection
Check water piping system and circulating pumps.
Check if the filter kit that was supplied with the unit separately is
installed correctly in front of the evaporator water inlet.
14
Water sensors
Check that all the water sensors are correctly fixed into the pipes
connected to the evaporator.
Water supply
Fill the water piping, taking into account the minimum water volume
required by the unit. Refer to the Installation manual.
Make sure that the water is of the quality as mentioned in the
installation manual.
Purge the air at the high points of the system and check the operation
of the circulation pump and the flowswitch.
Power supply connection and crankcase heating
To switch on the crankcase heater proceed as follows:
1
Switch on the circuit breaker on the local supply panel. Make
sure that the unit is "OFF".
2
The crankcase heater is switched on automatically.
3
Check the supply voltage on the supply terminals L1, L2, L3, by
means of a voltmeter. The voltage must correspond to the
voltage indicated on the identification label of the unit. If the
voltmeter reads values which are not within the ranges specified
in the technical data, check the field wiring and replace the
supply cables if necessary.
4
Check the LED on the reverse phase protectors. If it lights up,
the phase order is correct. If not, switch off the circuit breaker
and call a licensed electrician to connect the wires of the power
supply cable in the correct phase order.
5
Check if the crankcase heaters are warming up.
After 8 hours, the unit is ready for operation.
Not included with standard unit
Not possible as option
Possible as option
Obligatory
#
##
Not obligatory
*
**
Make sure that the circuit breaker on the power supply
panel of the unit is switched off.
In order to avoid compressor damage, it is necessary to
switch on the crankcase heater for at least 8 hours before
starting the compressor after a long period of standstill.
