Emerson EC3-D72 Operating Instruction

Description
EC3-D7x is the superheat controller with
TCP/IP connection for stepper motor driven
Alco Electrical Control Valves EX4...EX6 and
is optimized to operate with the Copeland
Digital Scroll series utilizing a 0-10V input
from a third party controller. The controller
synchronizes the PWM digital compressor
solenoid valve with the
superheat controlled by the electrical control valve; EX series. The EC3-D73 has the
same functionality but can only be set-up via the ECD-002 display. It has no external
communication functionality.
Note: This document contains short form instructions for experienced users.
!

Safety instructions:

Read installation instructions thoroughly. Failure to comply can result in device
•
failure, system damage or personal injury.
• The product is intended for use by persons having the appropriate knowledge and
skills.
• Disconnect all voltages from system before installation.
• Do not operate the system before all cable connections are completed.
Comply with the local electrical regulations when wiring.
•
Note: The EC3-D7x series contains
acid battery. The battery must NOT be disposed of with other commercial waste.
Instead, it is the user's responsibility to pass it to a designated collection point for the
safe recycling of batteries (harmonised directive 98/101/EEC). For further information
contact your local environmental recycling centre.

Technical data

Power supply 24VAC ±10%; 50/60Hz; 1A
Power consumption 25VA max. including EX4 ... EX6
Plug-in connector Removable screw terminals wire size 0,14 .. .1,5 mm
Grounding 6,3 mm spade earth connector
Protection class IP20
COM, TCP/IP connection RJ45 Ethernet
Connection to optional local ECC-Nxx or CAT5 cable with RJ45 connectors
ECD-002
Digital Input; Cooling 0/24VAC/DC for stop/start function. EX valve closes
demand during stop command. Typically thermostat or third party
controller.
Digital Input; Comp2 0/24VAC/DC typically connected to auxiliary connection.
running EX valve control loop remains active when input is 24V
and the Digital Scroll is idle.
NTC input; Coil-out Emerson temperature sensor ECN-N60 or ECN-P60
temperature sensor
NTC input; Discharge Copeland® NTC 86 kOhm at 25 °C
temperature sensor
4-20 mA Analog input Emerson PT5-07M / PT5-18M / PT5-30M
4-20 mA Analog output For connection to any 3
power supply and appropriate burden
Deviation from input signal
±8% max
Output alarm relay SPDT contact 24V AC/DC, 2 Amp inductive load
(If L2 = 1) Activated: During normal operation (no alarm condition)
Deactivated: During alarm condition or power supply is OFF
Output pump down relay SPDT contact 24V AC/DC, 2 Amp inductive load
(If L2 = 1) Activated: During normal operation
Deactivated: All other conditions
If the output relays are not utilized, the user must ensure appropriate safety
!
precautions are in place to protect the system against damage caused by a power
failure.
Output Digital Scroll 24V or 230V AC output to activate PWM valve on Digital
Scroll
Triac
Stepper motor output for Maximum current 0.6A with nominal 24VDC operating
EX4...EX6 voltage
Ambient temperature range 0 ... 60°C
1 ... 25°C (for best battery life time)
> 35°C battery life time < 2 years
In order to provide system protection in the event of power loss, it is recommended
!
to change the battery annually.
Mounting
The EC3-D7x is designed to be mounted onto a standard DIN rail.

Electrical installation

• Refer to the electrical wiring diagram for electrical connections.
• Do not apply voltage to the controller before completion of wiring.
• Ground the metal housing with a 6.3mm spade connector.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Operating instruction
EC3-D7x Digital Superheat Controller
EC3-D72 with TCP/IP communication capability
a VRLA battery= valve regulated rechargeable lead-
rd
party controller with 12/24VDC
www.emersonclimate.eu
• Important: Keep the controller and sensor wirings well separated from the mains
wiring. Minimum recommended distance 30mm.
Warning: Use a class II category transformer for the 24VAC power supply. Do not
ground the 24VAC lines. We recommend using individual transformers for the EC3
rd
controller and for 3 party controllers to avoid possible interference or grounding
problems in the power supply. Connecting any EC3 inputs to the mains voltage will
permanently damage the EC3.
Digital input status is dependant on operation of compressor/0-10V input
System
Operating Digital Inputs
condition
Comp. 1 & "Cooling demand"
Comp.2 in stop open (0V)
mode "Comp 2 Running"
open (0V)
Comp. 1 in run & "Cooling demand"
Comp.2 in stop closed (24V) /
mode) "Comp 2 Running"
open (0V)
Comp 1 & Comp. "Cooling demand"
2 in run mode closed (24V) /
"Comp 2 Running"
closed (24V)
Comp.1 in stop "Cooling demand"
and Comp. 2 in open (0V) /
run mode starts "Comp 2 Running"
closed (24V)
Digital comp. should always be regarded as base load; compressor 1

Wiring

2
A: White wire B: Black wire
C: Blue wire D: Brown wire
E: M12 Plug cable assembly EX5-Nxx for
connection to EX4/EX5/EX6
F: 24V/230V Triac output to the PWM
Digital Scroll valve
G: Remote control panel, system
controller
H: Alarm relay, dry contact. Relay coil is
not energised at Alarm or power off
!
The use of the relay is essential to protect
the system in case of a power failure; if the
communications interface or the ECD-002
is not utilized.
I: Digital input 1: "Cooling demand"
(Digital compressor run: (0V/open =
Stop; 24V/closed = Control Start;)
Date: 13.06.2016
0-10V input from third party controller
ECV remains closed irrespective of voltage
input value
ECV active
Input =0V: digital valve capacity at 10%
default capacity.
When the digital comp. is in by-pass the
ECV will:
Close when capacity is <70%
Be inhibited when the capacity is >70%
ECV active
The ECV will always modulate even when
the digital compressor is in by-pass mode.
ECV remains closed irrespective of voltage
input value
J: Transformer Class II, 24VAC
secondary / 25VA min. Model ECT-
323
K: Third party controller (can use the
suction pressure (4-20mA) analogue
output signal from the EC3)
L: Pump down relay, dry contact. Relay
is energized during normal operation.
M: Digital input 2: "Comp. 2 running"
(0V/open = Comp. 2 stop; 24V/closed
= Comp. 2 running
N: Discharge Temp. Sensor
Copeland® NTC
O: 0-10V Digital Scroll capacity
demand signal from the system
controller
P: ECN-N60 Coil out sensor
EC3-D72_OI_EN_R05_865019.docx