Preamble - Carrier 39HXC Manual

1 - PREAMBLE

This air handling unit is managed by its PLC. In addition to its control functions, it also monitors and detects any faults with the air
handling unit.
An HMI terminal associated with the PLC is used to view and modify the following parameters:
- Values of connected sensors
- Unit on/off cycles
- Calibration of the sensors
- Detection of alarms and log of the last 100 alarms
- Password-protected configuration and operating parameters
- Device running times and time delays
- Managing time programs (6 weekly and 6 annual)
- Language selection
Various terminal variants are available, to provide adaptability to the widest possible range of requirements:
- Remote terminal
- Terminal sharing between several air handling units
- Simplified remote user control in the room to be conditioned
This device is not designed to be used by persons (including children) with limited physical, sensory or mental
capabilities, or by persons with insufficient experience or knowledge.
Only qualified personnel, who have received in-depth training in the equipment, are authorised to work on the machine or modify the
PLC's advanced parameters.
If it proves necessary to work on the unit, all the guidelines and instructions given in the maintenance brochures, on the labels or in
the instructions accompanying the equipment should first be observed, along with any other applicable safety advice. It is in particular
recommended to cut all the power supplies to the unit using the disconnect switch and/or circuit breakers, and wait for the motors and
all other moving mechanical parts to stop.
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