Alco Controls

EC3 series
The EC3 series utilize in principle the same software
technology of the EC2 series but provide additional
inputs and outputs to satisfy the requirements of
even the most demanding systems. Like the EC2,
the EC3 series may be connected together to form
larger systems combining the control of multiple
compressors and fans. Many controllers include
0...10V outputs that may be used in conjunction
with frequency inverters and/or the FSP series of fan
speed power modules.
Coldroom Controllers
Commonly referred to as “cold application
controllers”, the EC3-300 series are specifically for
use with ECV stepper valve series (EX4, EX5, EX6,
EX7, EX8). In case of power loss the Electrical Control
Valve needs to be closed to avoid flooding of the
compressor, therefore each valve requires a battery
backup. For this reason, the battery together with
its automatic charging circuit has been incorporated
into the controller housing significantly saving
installation time as well as space in the electrical
enclosure.
The optional ECD-001 Display/keypad Unit is
available to display the system temperatures,
indicate system status and to modify parameters.
Rack and Condenser Controllers
Commonly referred to as “hot application controllers”,
the EC3-600, -700, -800 & -900 series controllers
are designed for the control of compressors and
condensers. Racks with one or two suction groups
and up to 8 single stage or 6 multistage compressors
can be managed. The EC3-600 series has been
extended to include a model designed to control a
Copeland Digital Scroll. The EC3-62x is designed for
one Digital Scroll with three additional single stage
compressors and incorporates a triac to switch the
PWM solenoid.
The control of condenser arrays with up to 6 fan
stages as well as a combined control of Rack and
Condenser is also possible. Refer to the table below
for a complete product listing.
The optional ECD-000 Display/keypad Unit is
available to display the system temperatures,
indicate system status and to modify parameters.
The Universal series of Controllers
are useful additions to the series. They are typically
used to enable the monitoring of temperatures
from integral display cases that do not have
communication facilities as well as potentially
providing additional input and output functionality
to control systems. Example of such applications
could be for switching display case lighting or for
the monitoring of individual pressure switches on
multiple compressor Racks.
Selection Table Electronic Controllers with Network Communication
Description TCP / IP LON Page
Display Case and Cold Room Controllers
Electronic Controller: Temperature + Superheat Control of EX2 (pressure/temperature input) EC2-352 EC2-351 36
version for use with a compressor pack system EC2-372 EC3-371 36
Electronic Controller: Temperature + Superheat Control of EX2 (temperature/temperature input) EC2-312 EC2-311 36
version for use with a compressor pack system EC2- 392 EC2-391 36
Electronic Controller: Thermostat, for TXV EC2-212 EC2-211 36
version for use with a compressor pack system EC2-292 EC2-291 36
Coldroom Controller: Thermostat + Superheat Control of EX4 .. EX8 (Stepper Motor) EC3-332 EC3-331 39
Rack and Condenser Controllers
Condenser Controller for up to 4 fans EC2-712 EC2-711 42
Condenser Controller with fan speed control EC2-742 EC2-741 42
Condensing Unit Ctr. for 2 single stage compressors and 2 fans, on / off control EC2-512 - 42
Condensing Unit Ctr. for 2 single stage comps., variable fan speed control with FSP module EC2-542 - 42
Condensing Unit Ctr. for 1 digital scroll and 1 single stage comps., fan speed control with FSP EC2-552 - 42
Condenser Controller for up to 6 stages, one with continous control output 0 ... 10V EC3-752 EC3-751 45
Rack Controller for 1 Digital Scroll and 3 single stage compressors EC3-622 EC3-621 45
Rack Controller for 4 single stage compressors EC3-612 EC3-611 45
Rack Controller for 8 single stage compressors EC3-642 EC3-641 45
Rack Controller for multistage compressors EC3-672 EC3-671 45
Dual Rack Controller for 4 + 3 single stage compressors EC3-812 EC3-811 45
Rack & Condenser Controller, 4 compressors + 3 fans + speed control EC3-922 EC3-921 45
Universal Controllers
With 2 digital inputs, 3 temperature inputs, 4 relay outputs EC2-112 EC2-111 36
A2.5.1/0706/E
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