The Intermediate Boys school consisting of two main buildings, several educational classrooms and labs and administration buildings in addition to basketball playground, mosque, theater, electrical building, and reception building. The school is serviced by mechanical, electrical, low voltage and security systems.
Mechanical System
The school is serviced by 33 package unit 2 stages for ventilation and cooling. 33 LOYTEC LSTAT-80x-G3-L1 network thermostats are distributed over 3 L-INX automation servers through Modbus RTU and control the units by 33 LIOB-55x by LIOB-IP mode. The sequence of operation is according to the pre-set time schedule. User override is accepted for a certain amount of time, and occupancy is considered. In addition, domestic water pumps are controlled by LIOB-55x I/O modules on auto-mode.
Power System
The school electrical loads are serviced by two 1 MVA distribution transformers as two separated incoming feeder. Each feeder is connected with 850 kVA generator through 1600 ampere ATS (Automatic Transfer Switch), and there are also two 10 kW UPS for critical loads. Full system status monitoring via GUI using LWEB-802 and LWEB-900 is included – with the ability of controlling On/OFF for distribution and lighting panels regarding the serviced zone through L-INX automation server and LIOB-55x: Recording energy metering, rush-hours of energy consumption are reported. In addition network components like THD (Total Harmonic Distortion) ensure grid quality. The UPS charging status and values for all parameters ensure the backup system quality.
Lighting System
24 educational class room, labs, and administration offices make in total 45 zones which are distributed over 13 DALI devices, LDALI-3E104, – 4 channel each to control more than 1426 DALI electric ballasts. Each serviced area includes two LDALI-MS1 sensors for specifying lux and occupancy state. In addition, one LDALI-BM1 per area is in use to select among 3 pre-set modes (AUTO-50%, diming, manual on-off). Constant Light Control is applied for each zone via LonMark functional profile in order to implement and achieve the lux level required on the working plan to assure maximum comfort and energy efficiency by linking presence state and lux level. Auto burn-in for fluorescent lamps is also considered. A full monitoring and controlling through graphical user interface is handeled with LWEB-802 and LWEB-900 via L-INX automation server on LonMark interface (CEA-709) with DALI devices.
Low voltage and system integration
The school is secured by an addressable fire alarm system for each zone with smoke and heat detectors depending on the zone nature and main bills for warning in case of fire and evacuation regarding the instructions of civil defense. The whole fire alarm system is integrated on LOYTEC BMS graphic interface on LINX automation server via BACnet-IP protocol showing the status of each detector and bill also definite the fire location as backup and operator friendly graphic interface. The access control system is integrated too on the system and give the ability to control the doors in case of emergency and in case of access card losing. PBX system is also integrated to make all systems easier to be reached and giving the operator the backup system that can help during the system operation.
