EC3-751_65087_EN_R04.doc
Replacement for R03
1 / 5
DWG Nr.: 864 915 26.09.2007
EC3-751 Condenser Controller with LON Interface
Operating Instructions
GB
Contents:
Safety instructions:
1
Technical data:
1
Mounting 1
Electrical Installation
2
Setup and Parameter Modification
using the Keypad
2
Temporary Display of Data:
2
Load Default Parameters:
2
Special Functions
2
Indications On The Display
2
Alarm Codes and Messages
2
Parameter List
3
Visualising Data
4
Note: This document contains short form instructions for experienced users.
Use last column in List of Parameters to document your individual settlings.
More detailed information can be found in the User Manual.
The
EC3-751
condenser controller is a digital controller for air cooled condensers.
The condenser may consist of up to 6 fans, one of which is continuously speed
controlled. The control target is to maintain the condensing pressure at a defined
value by varying the available fan capacity.
For the measurement of the condensing pressure, a PT4 pressure sensor (3) with 4
– 20 mA interface can be connected to the controller. The condenser controller has
eight relay outputs, six to command the fans (7), one for the heat recovery solenoid
(9) and one for General Alarm. Eight digital inputs for 24V AC/DC or 230V AC
are available, six for fan serial alarm (4), one for high pressure alarm (5) and one
for heat recovery demand (6). The first fan (8) can be continuously speed
controlled by the analogue output 0 to 10V with an ALCO FSP Fan Speed
Controller or directly with the onboard TRIAC. The fan power supply must be
connected to the Triac. To meet the EMC compliance in this case, an external filter
must be fitted. Two analogue inputs (1) can be used to measure a control
temperature and the ambient temperature. A 4…20mA input (2) is reserved for the
relative humidity sensor.
The optional
ECD-000
Display Unit can be connected to the EC3-751 for local
display of control parameters and for controller setup without the use of a PC.
Because the EC3-751 is fully functional without display unit the ECD-000 may be
removed at any time.
!
Safety instructions:
•
Read installation instructions thoroughly. Failure to comply can result in
device failure, system damage or personal injury.
•
It is intended for use by persons having the appropriate knowledge and skill.
•
Ensure electrical ratings per technical data are not exceeded.
•
Disconnect all voltages from system before installation.
•
Keep temperatures within nominal limits.
•
Comply with local electrical regulations when wiring
Technical Data
EC3 Series Controller
Power supply
24VAC ±10%; 50/60Hz; Class II
6.3mm spade earth connector
Power consumption
20VA max.
Communication LON
FTT10
Plug-in connector size
Removable screw terminals
wire size 0.14 … 1.5 mm
2
Temperature storage
operating
-20 … +65°C
0 … +60°C
Humidity
0…80% r.h. non condensing
Protection class
IP20
Pressure transmitter inputs
24VDC, 4...20mA
2 Temp. inputs for Ambient and
Control Temperature (1)
NTC 10 k
Ω
@ 25°C, -50 … +50°C
Humidity transmitter input (2) 24VDC, 4...20mA, 2 wires
Digital Inputs
24VAC/DC or 230VAC
Fan output relays
Inductive (AC15) 250V/2A
(6x) + General alarm
Resistive (AC1) 250V/8A
Heat recovery output
Triac rating
250V AC, max. 2A
ECD-000 Display Unit
Power Supply
From EC3-751 via connecting cable
Display
2½-digit red LED with decimal point
reversible between °C and °F
LED indicators
Controller 1, Controller 2, p bar, Alarm, IR status
Temp & Humidity
Identical to EC3-751 specifications above
Protection class
IP65 (front protection with gasket)
Connecting cable
ECC-N10 (1m), ECC-N30 (3m), ECC-N50 (5m) or
CAT5 cable with RJ45 connectors
Mounting
The EC3-751 can be mounted onto a standard DIN rail.
The ECD-000 can be mounted in panels
with a 71x29 mm cutout. See dimensional
drawing below for space requirements
including rear connectors.
Push controller into panel cutout. (1)
Make sure that mounting lugs are flush with
outside of controller housing
Insert allen key into front panel holes and
turn clockwise. Mounting lugs will turn and
gradually move towards panel (2)
Turn allen key until mounting lug barely
touches panel. Then move other mounting
lug to the same position (3)
Tighten both sides very carefully until
display is secured. Do not over tighten as
mounting lugs will break easily.