Maximum Operating Currents For Cable Selection; Electrical Wiring; Electrical Protection Standard (Protection Class); Refrigeration Piping Connections - Emerson Copeland Eazycool OMTE-90D-TFD Application Manuallines

3.2.2

Maximum operating currents for cable selection

Unit
OMTE-76D-TFD-501
OMTE-90D-TFD-501
OMTE-152D-TFD-501
OLTE-82D-TFD-501
Table 19: Maximum electrical values
3.2.3

Electrical wiring

Before commissioning, ensure that the neutral "N" and ground protection "PE" wires are connected
to the main switch.
3.2.4

Electrical protection standard (protection class)

▪
Units: IP class IPX4.
▪
Scroll compressors: IP21 according to IEC 34.
▪
Fan: IP44 according to IEC 34.
▪
Solenoid valve coils: IP65 according to DIN 43650.
3.3

Refrigeration piping connections

3.3.1

Refrigeration piping installation

WARNING
High pressure! Risk of personal injury! The units are pressurized with dry
air. Be careful when opening connections on a pressurized item.
WARNING
Low surface temperature! Danger of frostbite! The liquid line should be
insulated with 19 mm insulation thickness. Temperatures could be as low as
–15°C.
CAUTION
High temperature! Risk of component damage! Always use a wet cloth
when brazing the suction tube. Pay special attention to the pressure transmitter
on the suction pipe: it needs to be cooled down during brazing to avoid any
damage to the component.
IMPORTANT
Tubing quality! Installation contamination! All interconnecting piping should
be of refrigeration grade, clean, dehydrated and must remain capped at both
ends until installation. Even during installation, if the system is left for any
reasonable period, eg, 2 hours, pipes should be re-capped to prevent moisture
and contaminant from entering the system.
Connection sizes! Unsuitable refrigerant flow rate! Do not assume that the
service connection sizes on the unit (at the service valves) are in fact the
correct size to run your interconnecting refrigeration pipes. The service valve
sizes have been selected for convenience of installation and in some cases
(larger units) these may be considered too small. However, for the very short
pipe run within our units these service connection sizes are adequate. All
interconnecting piping should be sized to satisfy the duty required.
The pipe should be sized to ensure optimum performance and good oil return. The sizing must also
consider the full capacity range through which this unit will need to operate.
Pipe runs should be kept as short as possible, using the minimum number of directional changes.
Use large radius bends and avoid trapping of oil and refrigerant. This is particularly important for the
suction line. The suction line should ideally slope gently towards the unit. Recommended slope is
28
Max. Max. power consumption
operating
Single
current
compressor
[A]
[kW]
28 5.53
30 6.26
55 22.4
65 20.5
Single
Single fan
heater
[kW]
[kW]
0.66 70
0.66 70
0.66 0.66
0.66 0.66
C6.1.9/0219/E