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AC Controller :

SALIENT FEATURES

Air conditioning systems are vitally needed by Cell sites, offices etc. The heart of an Air conditioner is its compressor hence some protection means must be provided to the compressor to protect it from abnormal conditions such as Over voltage, Under voltage, Over Loading, etc. The efficiency of an Air conditioner depends on its Compressor. The compressor cause problems due unhealthy conditions such as Over voltage, Under voltage etc. & frequent start/stop without prior time delay for pressure equalization. To take care of A/C from such electrical hazards ‘PROTON ELECTRONICS’ has developed a new innovative product “AC GUARD.” AC GUARD is a Microprocessor based system that controls operation A/C & also protect it from electrical hazards. It also indicate respective faults by messages & LED on front panel. All the set points such as Voltage, Current, Temperature are site selectable & user can easily set them by using keys provided on the front panel.

SALIENT FEATURES

  • Controls/ Protects one Air conditioner.
  • Protection against Over voltage, Under Voltage, Over Load, Under load , with Alarm indication.
  • 3 Digit LED display to view Temperature, Voltage, Current & Set points.
  • Over voltage, under voltage, Over current, Temperature set point, Hysterisis of temperature, ON Time, OFF Time are user settable.
  • Low power consumption.
  • AC ON indication by LED on front panel.
  • Separate alarm contacts for power fail & AC fail alarms

Technical Specifications :

System Supply : 230 VAC +/- 15%
Output Contact Rating : Output contact rating for AC 25 A at 230 VAC
Power On Delay time : 1 minutes
Restart Delay time 3 minutes
Trip time delay 3 sec for UV & OV , 5 sec. OL & 5 minutes for UL
Over voltage Default 260 V .User settable by keys. , 10 V hysterisis between Cutoff & Cut in. Auto reset
Under voltage Default 180 V User settable by keys. 10 V hysterisis. Auto reset.
Over Load : Default 15 A. User settable by keys.
nder Load Default 3 A user settable. Make it 0 A to bypass UL protection
ON Time Default 60 min. User settable by keys
OFF Time : Default 30 min. User settable by keys
Indications
1.Healthy Indicates controller is working healthy.
2. ALARM when this LED glows it indicates some fault is present.
3 . AC : when this LED glows it shows AC is ON.

WORKING :

In normal working conditions when power is turned ON, after Power On Delay (1minute) AC will be turned ON. Display will show supply voltage, current taken by
A/C & room temperature. A/C indication will be ON indicating that A/C is running. In this condition system makes ON/OFF of A/C depending on the set point of
temperature during On Time set & remain OFF for the duration of Off Time set . Hysterisis for room temperature is settable. This is normal running condition of the
system. If fault occurs to one A/C then it is turned OFF . To view/change set points of over voltage, under voltage, over load, under load, temperature, hysterisis of temperature, press FUN key.
PARAMETER SET POINTS:
When FUN key is pressed, the parameter message is displayed & after that its setting is displayed.
t-C : Indicates temperature set point.
HyS : Indicates Hysterisis of temperature.
UV: Indicates Under Voltage set point.
OV: Indicates Over Voltage set point.
uL : Indicates Under load set point.
OL : Indicates Over load set point.
On- : Indicates ON Time set point.
OFF : Indicates OFF Time set point.

User can change the set point using arrow keys. Press FUN key to save the settings or leave keys for 5 sec. Automatically the set point is saved.

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