Alco Controls

Block Diagrams
EC3-81x Dual Ciruit Rack Controller (4 + 3 compressors)
Inputs
1 = Discharge temperature inputs of 3 compressors
2 = Suction pressure group A
3 = Suction pressure group B
4 = Serial alarm input for each compressor respectively
5 = Refrigerant level alarm
6 = Low pressure alarm group A
7 = Low pressure alarm group B
8 = High pressure alarm
9 = Oil level alarm
Outputs
10 = For up to 4 compressors suction group A
11 = For up to 3 compressors suction group B
Technical Data
A2.5.1/0706/E
EC3-92x Rack and Condenser Controller
Inputs
1 = Discharge temperature
2 = Ambient temperature
3 = Suction pressure
4 = Condensing pressure
5 = Serial alarm inputs for 4 compressors
6 = Low pressure alarm
7 = High pressure alarm
8 = Oil level alarm
9 = Refrigerant level alarm
10 = Serial alarms for 3 fans
11 = Heat recovery demand
Outputs
12 = Up to 4 compressors
13 = Up to 3 fans, from with 1 fan can be
speed controlled
14 = Speed controlled fan (see 13)
15= Heat recovery solenoid
EC3 Controller ECD-000 Display Unit
Supply voltage 24 VAC ±10%, 50/60 Hz Class II only Supply voltage via ECC-N10 from EC3 controller
Power consumption 20 VA max. Display Numeric segmental display,
LED red, 2½ digits, numeric value
Plug-in connector Removable screw terminals device status and alarm indication
Digital I/Os wire size 0.5 … 2.5 mm2 LEDs 1 x unit indicator bar/°C
Analog I/O wire size 0.14 … 1.5 mm2 1 x alarm LED
Communication LON: FTT10 Connecting lead 1,0 m (ECC-N10)
interface TCP/IP: Ethernet with Web Server Operating Keys 4 operating keys: programming,
service/up, select/down
Temperature Temperature
storage -20 … +65°C storage -20 … +65°C
operating 0 … +60°C operating 0 … +60°C
Humidity 0 … 80% r.h. non condensing Humidity 0 … 80% r.h. non condensing
Protection class IP20 Protection class IP 65 (front panel with gasket)
Weight ~ 810 g Weight ~ 52 g
Mounting DIN-rail mount Mounting Panel mount (71x29mm cutout)
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