Airwell AQCL 120 [4/20] Iltc control system
Макгруп McGrp.ru
Задайте вопрос
Зарегистрироваться

Airwell AQCL 120 [4/20] Iltc control system

Airwell AQCL 120 [4/20] Iltc control system
Page 4
ILTC Control System
The ILTC control system is an intelligent digital control system
designed especially for optimising the operation of AQCL units and
maintaining conditions of maximum comfort.
Before each start-up, the ILTC control system runs through a
complete machine checklist. It continuously monitors and manages
all the machine’s operating parameters and safety devices. It
precisely manages the running of the compressors and fans in
order to optimise energy consumption. It also controls the operation
of the water circulation pump.
User interface :
The ILTC control system has an easy-to-use user interface comprising
a 4 character, 7 segment red colour LED display, 2 keys below the
display for access to the different menus : the right key is reserved
for scrolling up and down the menus, and the left key for selecting
a parameter and displaying its value.
Six main menus are available for accessing all the machine’s
controls :
- Parameters.
- Temperature sensors and pressure transducers.
- Active safety alarms.
- Compressors’ operating times.
- Safety alarms history (last 10 alarms).
- Machine operating status.
Using these 6 menus enables a machine status diagnosis to be
performed as well as checking all the AQCL unit’s parameter
settings.
ILTC control system description
- Intelligent control with return water temperature control and
outlet water temperature measurement.
- The selection and operating time duration of each compressor
is automatically managed by the ILTC control system, with the
possibility of balancing the compressors’ operating times. When
they are operating, the compressors are monitored constantly to
improve their operating cycle and to avoid any excessive cycling.
Thus, these AQCL units can operate in complete safety with a
low volume of water in the installation, enabling the buffer tank
to be dispensed with in the majority of comfort air conditioning
applications.
- The ILTC control system is intelligent, i.e. it continuously adapts to
changes in the installation’s thermal load by optimising running
times with the selection of one or both compressors, in relation
to actual demand.
- Water pump control with 2 possible operating modes: Continuous
operation in ON / OFF mode or operating only in ON mode.
- As standard, the ILTC control system offers the possibility of
selecting a "Night-time running mode" function.
When the "Night-time Running" mode is activated, four
operating modes are available :
1st mode : Selected to change the set temperature for energy
savings when the building is unoccupied.
2nd mode : Selected to enable the set temperature to be
lowered.
3rd mode : Selected to change the set condensing pressure
values.
4th mode : Selected for applying a combination of modes
1 and 3.
- In addition, as a standard feature, the ILTC control system offers
the possibility of automatically compensating the set temperature
value in relation to changes in the outdoor air temperature.
Safety
The system measures changes in parameters (temperatures,
pressures,…) and reacts to keep the compressor within its operating
range.
If, despite everything, a parameter exceeds its limit, a warning
message is generated and the machine is shut down.
The following faults cause the machine to shut down :
- Suction pressure too low.
- Discharge pressure too high.
- Outlet water temperature below authorised limits.
- Discharge temperature too high.
- Compressor(s), fan(s), water pump overload.
- Compressor direction of rotation reversed.
- Temperature sensors and pressure transducers fault.
- Evaporator anti-freeze protection.
The ILTC control system has 33 alarm codes enabling the origin of
breakdowns to be determined.
The following safety devices protect the units :
- Water flow switch or differential pressostat.
- Fan thermal relays.
- N° 1 and N° 2 compressor internal thermal protection.
- Hydraulic pump thermal relay.
- HP safety pressostat.
Remote unit management
The system enables the following functions to be operated, by
means of dry contacts :
- Remote ON / OFF switch.
- Remote Day / Night running mode switch.
- Loadshedding mode.
- Remote alarm reading.

Содержание

Похожие устройства

Скачать