Condensing Unit Controller EC2-5X1
2.2
EC2-511 Condensing Unit Controller
Copeland EazyCool™ condensing units with 2 compressors are equipped with an EC2-
511 electronic Controller modulating compressors and fans in commercial refrigeration
applications.
In fact there are two controllers present in the EC2-511 condensing unit controller:
1 (one) for controlling compressor capacity and,
1 (one) for controlling condenser pressure.
The control target of the
compressor controller
is to maintain the suction pressure at a
defined value by varying the available compressor capacity based on the “ON/OFF” of the
compressors (EC2-511 controller).
The control target for the
condenser controller
is to maintain the condensing pressure at
a defined value by switching fans on/off on the Standard version (Two-compressor unit
without fan speed controller - EC2-511 Controller)
For the
measurement
of the
suction pressure
and the
condensing pressure
, two Alco
Controls PT4 pressure sensors with 4~20 mA interfaces are connected to the condensing
unit controller.
The controller has:
Four relay outputs; 2 for compressor control and 2 for fan control
Three digital inputs for Volt-free input contacts are available
o
two of these are used for compressor serial alarm
o
the third - available for a fan serial alarm - is provided with a link, which
should be removed, for use with an external serial alarm loop.
The
display
can show values with a decimal point in the range between -19.9 and +19.9
otherwise without decimal point.
An IR receiver for the optional IR remote control unit is built-in.
For communication purposes, an Echelon LONWorks® interface is provided (TP/FT-10
transceiver type).
The supply voltage is 24 V AC. A transformer for 230V main supply to 24 V AC is fitted in
the Copeland EazyCool™ condensing unit electrical panel.
English
French
German
C6.1.3/0505-0705/E
Part no: 3125495
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