Operating instructions
67
Access to low-voltage electrical equipment is dangerous
and can result in death or serious injury.
Personnel working on the control boxes must be qualified
to work on low-voltage installations in accordance with the
safety regulations applicable at the site. It must be authorized
for the work and familiar with the equipment and the
installation, as well as the instructions and safety measures
described in this document.
Never work on a unit that is energized.
Do not work on any electrical components, until the main
unit power supply has been switched off using the disconnect
switch(es) integrated into the control box(es).
During maintenance periods lock the power supply circuit
upstream of the unit in the open position.
ATTENTION: The electronic starters that are used for
the 19XR control boxes normally have a delta connection
(square root of three installation). Depending on the wiring,
voltage is present at all motor terminals if the main
disconnect switch for the control box is in the ON position.
The operating and storage conditions are as those described
for the standard machine.
The machines must be installed inside the building. Control
boxes are protected against water projections to IP44 in
accordance with standard IEC60529-1: they are protected
against accidental and exceptional water projections from
any direction, without pressure.
The 19XRV electrical equipment is designed to ensure
machine conformity with all applicable European directives:
• Machinery directive 98/37/EC modified and low-voltage
directive 2006/90/EC:
The electrical equipment is designed and integrated in
accordance with the recommendations of European
standard EN60204-1
• European directive 2004/108/EEC (Electromagnetic
compatibility):
Conformity is assured by application of generic standards
61000-6-2 and 61000-6-4 that apply to industrial
applications.
The standard components in the PIC control box and the
optional equipment present to ensure compressor start-up
and supply are located in a single control box.
The PIC control equipment includes (identified in accordance
with the references on the wiring diagram):
• The internal control circuit transformer (TC1) and the
oil heater (TC2) transformer,
• The CCM control module (A3),
• The interface control screen ICVC (A2).
• The compressor control and protection module ISM
(A1): it controls compressor start and stop, as well as
electrical and non-electrical protection devices:
- Monitoring of the current drawn: overcharge,
imbalance, leak current.
- Voltage monitoring: phase order, imbalance,
over-/undervoltage, micro cut-outs etc.
- It also ensures fault information reporting to the
PIC control: starter, safety pressure switch, oil
pump operation.
• The oil pump (KM81) and heater (KM66) changeover
contactors.
• The short-circuit protection breakers (QF).
The power equipment includes the following operational
elements:
• The circuit breaker/main disconnect switch QF101 for
the following functions:
- short-circuit protection at the main circuit.
- isolation and shut-down of the machine, using the
handle on the outside of the control box.
- emergency stop initiated by the PIC II control.
• The electronic Siemens starter 3RW44 (GS1) that
ensures functions, such as:
- compressor start and stop using voltage/frequency
ramping, permitting limitation of torque and
current draw at start-up.
- overheat or overcharge auto-protection.
- status report via dry contacts: ON/OFF, fault.
• The interface relay between the PIC power and control
equipment: start-up (K1), emergency cut-out (TRIP),
fault reporting (K4 ; K2).
• The emergency cut-out circuit transformer (TC4).
• The emergency cut-out relay (CTRL) in case of 115 V
power supply failure at the ISM board.
• The cooling fans of the control box (EV) regulated by
thermostat ST91.
• For details and the component location in the control
box refer to the wiring diagram supplied with the
machine.