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8.4. CARRIERrtc electronic control
The
CARRIERrtc
control is basically composed of a μPC
MEDIUM control plate, a pGD1 graphical terminal, a TCO user
terminal (optional), and sensors.
Please refer to this control brochure to obtain more detailed
information about its operation.
pGD1 terminal:
This terminal, installed in the electric panel of the machine,
allows for:
● The initial programming of the unit.
● The modifi cation of the operating parameters.
● Stopping/starting the unit.
● The selection of the operating mode.
● Setting the setpoints.
● The on-screen view of the controlled variables and the values
measured by the sensors.
● The on-screen view of the description of the active alarms
and the alarms log.
8 - ELECTRICAL CONNECTION
8.1 Installation norms
Important:
All connections in the site are the
responsibility of the installer. These connections are
always made as per the current regulation. Always refer
to the wiring diagram provided with the unit.
To prevent electrical shocks, make all electrical
connections before energizing the unit. Check that the
automatic switch is closed. Omitting this can cause
personal damage. Make the ground connection before
any other electrical connection.
V-220005
The installer must provide electrical circuit protections
according to the eff ective legislation.
Example:
On a 400 V - 3 ph - 50 Hz power supply, the individual phase
voltages were measured with the following values:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406+399+394)/3=1199/3 = 399.7 i.e. 400 V
Calculate the maximum deviation from the 400 V
average:
(AB) = 406 - 400 = 6 -> % = 100 x 6 / 400=1.5
(BC) = 400 - 399 = 1 -> % = 100 x 1 / 400=0.25
(CA) = 400 - 394 = 6 -> % = 100 x 6 / 400=1.5
Moteur
Motor
● The name plate data.
● The wiring diagram included with the unit.
● Norms in eff ect that regulate the installation of air conditioning
units and electrical receivers in the country of installation.
Wiring must be selected based on:
● The maximum power input, taking into account all the options
it features (refer to the technical brochure and the name plate).
● The distance between the unit and its power source.
● The protection to be placed at the power source.
● Neutral operating conditions.
● The electrical connections (refer to the wiring diagram
provided with the unit).
● The temperature the wiring is exposed to;
● The fi tting method.
After wire sizing has been completed, the installer must verify the
appropriate means of connection and defi ne any modifi cations
necessary on site.
Important:
It is the responsibility of the installer to protect the
unit from overvoltage coming from the mains or voltage spikes
caused by lightning. Depending on the geographic location
and the type of mains network (buried or overhead), a lightning
rod needs to be installed. Check the local electrical codes and
regulations. Failure to comply with the requirements of standards
in force in the country of installation will void the warranty.
Power cable access routing
The power cables can be routed into the electrical box for the
units:
● Via the panel located under the electric panel.
● Via the base of the unit
It is important to check that the power cable bend radius is
compatible with the connection space available inside the
electric panel.
8.3 Wire sizing
Wire sizing is the responsibility of the installer to suit the
characteristics of the installation site and comply with applicable
regulations.
To perform the electric installation of the unit (cable glands,
wire sizing and their calculations, protections, etc.), refer to the
information provided in:
● The technical brochure of this series.
8.2 Power supply
Verify that power supply agrees with the unit name plate and
that the voltage remains constant.
Warning: Operation of the unit with an incorrect supply voltage
or excessive phase imbalance constitutes misuse which will
invalidate the manufacturer’s warranty. If the phase imbalance
exceeds 2% for voltage, or 10% for current, contact your local
electricity supplier at once and ensure that the unit is not
switched on until corrective measures have been taken.
Voltage phase imbalance (%)
% imbalance =
100 x max. deviation from average voltage
average voltage
Summary of Contents for 50EH 1100
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