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Packaged rooftop units
9. C
HECKING BEFORE COMMISSIONING
Note: Under no circumstance should the unit be started without having read the brochure completely.
Electrical connections
Installation norms
To perform the electric installation of the unit (cable glands , conductor
section and their calculations, protections, etc.), refer to the information
provided in this document (see the technical characteristic table), the
electrical scheme included with the unit and norms in effect that regulate
the installation of air conditioning units and electrical receivers.
The electric power supply of the unit must be sized in accordance with
the maximum power input by the unit taking into account all the options
it features (if necessary, refer to the technical brochure).
Verify that electrical power corresponds to the one on the data plate
and that the voltage remains constant.
Check that the electrical connections are correct and tight
(an electrical diagram is included with each unit, along with
its legend).
Note: All connections in the site are the responsibility of
the installer. These connections are always made as per
the current regulation.
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
V-220004
ground connection before any other electrical connection.
The installer must fi x line protection elements according to
the effective legislation.
V-220005
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.
14
TCO user terminal (optional):
This terminal can be installed on the electric
panel, instead of pGD1 terminal. In this
case, the remote connection of the pGD1
terminal is posible.
Optionally, these units can change the electronic control to CARRIERrtc
basic (models 90 to 180) or CARRIERrtc medium (all models). This
control is fi tted with the TCO terminal as standard, and the pGD1 terminal
as an option. Consult the technical brochure.
Note: for more detailed information on these controls, please refer to
their brochures.
CARRIERrtc connection chart
Nb.
50EN/EH
1 Main power supply 400 III (±10%)
Remote connection of pGD1
2
terminal (by default it's installed
on the electric panel)
Connection of TCO user terminal
3
on the electric panel (optional)
4 Remote off/on (optional)
5 Main failure signal (optional)
Circulation pump signal for HWC
6
(antifreeze sec.) (opt.)
7 NTC ambient probe (std)
8 RS485 ambient probe (opt.)
9 Air quality probe (opt.)
In this case, it´s posible to install the TCO terminal on the electric panel.
It's necessary that the terminal uses the same power supply that the control
board.
Up to four RS485 ambient probes can be connected in series on the fi eld-bus
of the control board.
1
2
3
4
5
6
7
8
9
90 to 360
3 wires + ground
telephone cable 6 wires
standard (RJ12 connector)
2 wires for power supply 230V + 1
shielded cable for communication
type AGW20 / 22 (1 braided pair +
drainwire + shielding)
2 wires
2 wires
1 wire
2 wires
5 wires
3 wires
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