Operating instructions
28
• 19XR units have one or two power connection points.
• The control box always includes the protection and control elements, as well
as the power circuit for the oil pump and the heaters. As an option or as
standard on the 19XRV machines, the electrical equipment also includes the
start-up and protection elements for the compressor motor.
• All connections to the system and the electrical installations must be in full
accordance with all applicable codes*.
• The Carrier 19XR units are designed and built to ensure conformance with
local codes. The recommendations of European standard EN 60204-1
(corresponds to IEC 60201-1) (machine safety - electrical machine
components - part 1: general regulations) are specically taken into account,
when designing the electrical equipment.
• Generally the recommendations of IEC 60364 are accepted as compliance
with the requirements of the installation directives. Conformance with EN
60204-1 is the best means of ensuring compliance with the Machines
Directive and § 1.5.1.
• Annex B of EN 60204 1 describes the electrical characteristics used for the
operation of the machines.
1. The operating environment for the 19XR units is specied below:
Environment* Environment as classied in IEC 60364 § 3:
- ambient temperature range: +5°C to +40°C, class AA4*
- humidity range (non-condensing)*:
50% relative humidity at 40°C
90% relative humidity at 20°C
- altitude: ≤ 2000 m for 19XR machines (≤ 1000 m for 9XRV machines)
- indoor installation
- presence of water: class AD2* (possibility of water droplets)
- presence of hard solids, class AE2* (no signicant dust present)
- presence of corrosive and polluting substances, class AF1 (negligible)
- vibration and shock, class AG2, AH2
Competence of personnel, class BA4* (trained personnel - IEC 60364)
2. Power supply frequency variation: ± 2 Hz.
3. The neutral (N) conductor must not be connected directly to the unit (if
necessary use a transformer).
4. Overcurrent protection of the power supply conductors is not provided with the
unit.
5. The factory installed disconnect switch(es)/circuit breaker(s) is (are)
disconnect devices of a type suitable for power interruption in accordance with
EN 60947-3 (corresponds to IEC 60947-3).
6. The units are designed for connection to TN networks (IEC 60364). For IT
networks the earth connection must not be at the network earth. Provide a
local earth, consult competent local organisations to complete the electrical
installation.
If particular aspects of an actual installation do not conform to the conditions
described above, or if there are other conditions which should be considered,
always contact your local Carrier representative.
* The protection level required to conform to this class is IP21B (according to
reference document IEC 60529). All 19XR units are protected to IP23 and full
this protection condition.They are also protected against accidental and
exceptional non-pressurised water jets.
3.6.3 - Recommended wire section
The section and number of connectable power supply
cables for the 19XRV machine are given in the specific
chapter on each starter mode (starting with chapter 8).
IMPORTANT: Before connection of the main power cables
(L1 - L2 - L3) on the terminal block, it is imperative to
check the correct order of the 3 phases before proceeding
to the connection on then terminal block or the main
disconnect/isolator switch.
3.6.4 - External control wiring
3.6.4.1 - Field control wiring
Refer to the 19XR PIC Controls IOM and the certified
wiring diagram supplied with the unit for the field control
wiring of the following features:
• Evaporator pump interlock (mandatory)
• Remote on/off switch
• Alarm report
• Condenser pump control
• Remote set point reset
• Refrigerant leak detection
• Demand limiter
• Percentage, capacity in operation
• Emergency stop
3.6.4.2 - Communication wiring
The standard external communication protocol is CCN. A
JBus/ModBus communications board is available as an
option.
3.6.5 - Make the necessary connections for the outgoing
control signals
Connect the auxiliary equipment, the chilled water pumps
and the condenser water pumps, as well as the additional
alarms, as indicated in the job wiring diagrams.
3.6.6 - Connect the starting cabinet
The 19XR is available either with a unit-mounted, factory-
installed starter cabinet (optional), or with a separate,
field-installed starter. See Fig. 21 or 22, depending on the
starter type (unit mounted or separate).
3.6.6.1 - Unit-mounted factory-installed starter cabinet
Connect the power leads of the auxiliary equipment,
chilled and condenser water pump as well as the associated
alarms, using the conductor provided. Refer to the wiring
diagram for the installation.