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Air cooled inverter water chiller
OPERATION
MANUAL
EWAD TZ B 160-700
Air cooled inverter water chiller
D-EOMAC00909-16EN
Operation Manual
7
1.3 Safety Devices
Each unit is equipped with safety devices of three different kinds:
1.3.1 General safety devices
Safeties of this level of severity will shut down all the circuits and stop the entire unit. When a
general safety device will occur a manual intervention on the unit will be required in order to re-
establish the normal operability of the machine. There are exceptions to this general rule in case of
alarms linked to temporary abnormal conditions.
Emergency Stop
A push button is placed on a door of the unit electrical panel. The button is highlighted by a red
color in yellow background. A manual pressure of the emergency stop button stops all loads from
rotating, thus preventing any accident which may occur. An alarm is also generated by the Unit
Controller. Releasing the emergency stop button enables the unit, which may be restarted only
after the alarm has been cleared on the controller.
The emergency stop causes all motors to stop, but does not switch off power to the unit. Do not
service or operate on the unit without having switched off the main switch.
1.3.2 Circuit safety devices
Safety of this level of severity will shut down the circuit they protect. The remaining circuits will
keep running.
1.3.3 Component safety devices
Safety of this level of severity will shut down a component against abnormal running condition that
could create permanent damages to it. An overview of the protecting devices is listed below:
Overcurrent/Overload Protections
Overcurrent/overload devices protect electrical motors used on compressors, fans and pumps
in case of overload or short circuit. In case of inverter-driven motors, overload and overcurrent
protection is integrated in the electronic drives. A further protection from short circuit is
accomplished by fuses or circuit breakers installed upstream each load or group of loads.
Overtemperature Protections
Compressor and fan electrical motors are also protected from overheating by thermistors
immersed into motor windings. Should the winding temperature exceed a fixed threshold, the
thermistors will trip and cause the motor to stop. High Temperature Alarm is recorded in the Unit
Controller only in case of compressors. Alarm must be reset from the controller.
Do not operate on a faulty fan before the main switch has been shut off. Overtemperature protection
is auto-reset, therefore a fan may restart automatically if temperature conditions allow it.
Phase reversal, under/over voltage, ground fault protections
When one of those alarms occurs the unit is immediately stopped or even inhibited to start. The
alarms clear automatically once the problem is fixed. This auto clear logic allows the unit to
automatically recover in case of temporary conditions where the supply voltage reaches the
upper or lower limit set on the protection device. In the other two cases a manual intervention
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Productinformatie
| Merk | Daikin |
| Model | EWAD620TZPLB |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11976 MB |
