COMPRESSORS
COMPRESSORS
NO SWITCH (MANUAL I/O, TILT, ETC.) IS ALLOWED TO BE CONNECTED IN SERIES WITH THE
THERMOSTAT.
IF ELECTRONIC THERMOSTATS ARE TO BE FIT, AVOID THOSE THAT INCORPORATE MANUAL I/O
SWITCH AND/OR STARTING DELAY.
Compressor will run during four hours after start-up. The speed can be limited by a fixed
programmed value and even more by the available battery voltage as described in standard
mode. The speed can also be limited by external switching in a similar way as described in
standard mode, according to table 5:
If off sleep mode is selected, the appliance will run continuously at selected fixed speed Smin
or Smax.
Compressor will run during four hours. During first hour compressor will run at selected speed.
During next three hours speed will decrease up to 1,500 r.p.m. Programming Sleep Energy
Saving is done in the same way as Sleep.
Under this mode, variable speed is controlled by an Electronic Integral Manager of the
appliance (EIM) permanently connected to the electronic driver FDC1 through the SPI, using its
serial communication capability. The EIM reads the current temperature inside the appliance,
compares it with the set point temperature, and decides if the compressor should operate or
not, and if so, at which speed. The EIM communicates how the compressor should operate and,
eventually, records and displays any abnormal circumstance that might occur. For details about
the communication protocol, please, contact ACC.
IF ANY VARIABLE SPEED MODE IS TO BE PROGRAMMED, CHECK CAREFULLY FOR TUBES,
CONDENSER AND EVAPORATOR RESONANCES. NATURAL FREQUENCIES SHOULD BE 75 Hz UP
TO AVOID VIBRATIONS.
Sleep mode:
❖
Sleep Energy Saving mode:
❖
Slave mode:
❖
IN1
IN2
0
0
0
1
1
1
off
on
off
on
Smin
Smin
Smax
Smax
0
1
Table 5. External selection of the velocity
0=Open connection; 1=Shortened
Speed of the motors (rpm)
Sleep mode
Connection to COM
September 2006
8
GD30FDC User Manual
DISTRIBUTED by PROCOLD S.r.l. - Italy - Tel: (+39) 0161 42 44 52 - [email protected]
