Air and Water cooled inverter chillers and heat pump
EWAD TZ - EWAD TZ B - EWWD VZ
Air and Water cooled inverter chillers
and heat pump
D-EOMZC00105-17EN
Operation Manual
7/84
1
SAFETY CONSIDERATIONS
1.1 General
Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the installation
are not considered: operating pressures, presence of electrical components and voltages and the installation
site (elevated plinths and built-up up structures). Only properly qualified installation engineers and highly
qualified installers and technicians, fully trained for the product, are authorized to install and start-up the
equipment safely.
During all servicing operations, all instructions and recommendations, which appear in the installation and
service instructions for the product, as well as on tags and labels fixed to the equipment and components and
accompanying parts supplied separately, must be read, understood and followed.
Apply all standard safety codes and practices.
Wear safety glasses and gloves.
Use the proper tools to move heavy objects. Move units carefully and set them down gently.
1.2 Avoid electrocution
Only personnel qualified in accordance with IEC (International Electrotechnical Commission)
recommendations may be permitted access to electrical components. It is particularly recommended that all
sources of electricity to the unit be shut off before any work is begun. Shut off main power supply at the main
circuit breaker or isolator.
IMPORTANT: This equipment uses and emits electromagnetic signals. Tests have shown that the
equipment conforms to all applicable codes with respect to electromagnetic compatibility.
RISK OF ELECTROCUTION: Even when the main circuit breaker or isolator is switched off, certain circuits may
still be energized, since they may be connected to a separate power source.
RISK OF BURNS: Electrical currents cause components to get hot either temporarily or permanently. Handle
power cable, electrical cables and conduits, terminal box covers and motor frames with great care.
ATTENTION: In accordance with the operating conditions the fans can be cleaned periodically. A fan can start at
any time, even if the unit has been shut down.
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.