Stulz CyberCool 2, Оригинальное руководство пользователя

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cybercool 2 screw original insTrUcTions
6.5 Commissioning of the chilled water circuit
6.4 Oil pre-heating
pump 1 hand 1
pump 1 handon 1
• To pre-heat the oil, the chiller must be supplied with voltage, the circuit breakers of the compressors must
be switched off for safety reasons. In normal operation of the chiller, the oil heater is always in operation
when the compressor is switched off.
The control must also remain switched off during the oil pre-heating (by Start/Stop key on the controller), as
alarms might unnecessarily occur as soon as a cooling request exists.
According to the specification of the compressor manufacturer the oil must have a minimum temperature of
20°C and be at least 20 K above the outdoor temperature.
Above an outside temperature of 10°C the oil pre-heating must be put into operation 8 hours before the first
start of the compressor. Below an outside temperature of 10°C, the chiller requires an oil pre-heating time of
24 hours. During the oil pre-heating time the compressor cabinet should be kept closed.
Ensure that the water system has been sufficiently filled and that all stop valves are open.
• Check the sense of rotation of the pump and start the pump. If the pump is controlled by the C7000 control -
ler, the manual mode is suitable, because this mode is functional even when the control is switched off, for
example during oil pre-heating.
• Notice for speed-controlled pumps:
- ensure that the standby-reheat is activated.
- ensure that the condensate plugs have been removed.
• The full functionality of the C7000 controller can only be used by typing text commands into a terminal pro -
gram (e.g. the terminal program "C7000ConfigTerminal"). For this you need to connect the laptop to the ser-
vice port X15 of the I/O controller via a null modem cable. (detailed description see controller manual.) You
can place the laptop at the bottom in the control section of the electric cabinet.
The following two commands put the pump into operation, each command is sent by pressing the Enter key:
• In the meantime the laptop can be switched off and the connection to the I/O controller can be separated.
• Keep the pump running for 8 hours and clean the implemented filter (recommended part of the external cir
-
cuit) after this lapse of time.
Scale indicator e.g. on the
high pressure limiter
6.3 Control of pressure switch setting
• Before the oil pre-heating, check the setting of the low pressure switches and
the high pressure limiters in the compressor cabinet by checking the scale
indicator.
For this purpose remove the upper and lower panel of the compressor cabinet on
the right side. Re-install the panels after the check, otherwise the oil pre-heating
would be delayed.