Checking Before Commissioning; Electrical Connections - Carrier 50HB Manual

Horizontal package air conditionners
8. 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 basic Electronic control
All 50HB/HF units have an CARRIERrtc basic electronic control as
standard from the factory comprised of a main board and a TCO user
terminal.
Optionally, this control can have a terminal for pGD1 maintenance
that facilitates the initial scheduling of the unit, the modifi cation of the
operating parameters and the description of the alarms produced.
Note: For more detailed information on this control please refer to the
specifi c brochure.
• Recommendations for the TCO thermostat installation
From the thermostat some of the unit operation aspects are
controlled: operation modes, setpoint, differential, timings...
Because of this, it is very important to chose
an appropriate location within the room
since in it is where the unit's control probe
is located.
This probe must report about the environmental
conditions of the occupied area.
8
The thermostat must be fi xed at a height of 1.5 m y all possible
interferences must be avoided: sun, outdoor air, internal heat
sources... Mount the thermostat to the wall using the bracket, do not
leave it hanging from the wire or embedding it in the wall.
Connection chart
Outdoor
air circuit
4
5
6
No. Description
1
Main power supply 400 III (±5%)
2 TCO user terminal connection
pGD1 maintenance terminal
3
connection (optional)
4
Remote off/on (optional)
5 Main alarm signal (optional)
6
Safety electrical heaters (opt.)
 The same power supply used for powering the control board must

also be used for powering the terminal.
Indoor
air circuit
1
TCO user
2
terminal
3
pGD1
maintenance
terminal (opt.)
55 to 160
3 + GND
2 wires for power supply 230V + 1
shielded cable for communication
type AGW20 / 22 (1 braided pair +
drainwire + shielding)
telephone cable 6 wires standard
(RJ12 connector)
2 wires
2 wires
2 wires