Emerson EC3-D72 Instruction Sheet

Instruction Sheet
PA-00368
June 2013
EC3-D72 with TCP/IP Communication Capability
EC3-D72 is the superheat controller with TCP/IP connection for step-
per motor driven Electrical Control Valves EX4...EX6 and is optimized
to operate with the Copeland Digital Scroll series utilising a 0-10V input
from a third party controller. The controller synchronises the PWM digital
compressor solenoid valve with the superheat controlled by the electrical
control valve; EX series.
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 system before all cable connections are completed.
• Comply with local electrical regulations when wiring.
Note: The EC3-D72 series contains a lead, acid gel rechargeable bat-
tery. 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
center.
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 mm2
Grounding . . . . . . . . . . . . . . 6,3 mm spade earth connector
Protection class . . . . . . . . . . IP20
COM, TCP/IP connection RJ45 Ethernet
Connection to optional . . . . ECC-N30 or CAT5 cable with RJ45 connectors
local ECD-002
Digital Input; . . . . . . . . . . . . 0/24VAC/DC for stop/start function. EX valve closes
Cooling demand during stop command. Typically thermostat or third
party controller.
Digital Input; . . . . . . . . . . . . 0/24VAC/DC typically connected to auxiliary connection.
Comp2 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
4-20 mA Analog input . . . . . Emerson PT5-07M / PT5-18M / PT5-30M
4-20 mA Analog output . . . . For connection to any 3rd party controller with 12/24VDC
Deviation from input signal power supply and appropriate burden ±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
WARNING: 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
t Triac
Stepper motor output . . . . . Maximum current 0.6A with nominal 24VDC operating voltage
for EX4...EX6
Ambient temperature . . . . . . 32 – 140°F
range 34 – 77°F (for best battery life time)
> 95°F; 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.
EmersonClimate.com/FlowControls
EC3-D72 with TCP/IP
Communication Capability
MOUNTING
• The EC3-D72 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 ¼" spade connector.
• Important: Keep controller and sensor wiring well separated from
mains wiring. Minimum recommended distance 1.2".
WARNING: Use a class II category transformer for 24VAC power supply.
Do not ground the 24VAC lines. We recommend using individual trans-
formers for EC3 controller and for 3rd party controllers to avoid possible
interference or grounding problems in the power supply. Connecting any
EC3 inputs to mains voltage will permanently damage the EC3.
WIRING
A: White B: Black C: Blue D: Brown
E: M12 Plug cable assembly
EX5-Nxx for connection to EX4/EX5/EX6
F: 24V/230V Triac output to
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
WARNING: The use of the relay is essential
to protect the system in case of power
failure if the communications interface or
the ECD-002 are not utilized..
I: Digital input 1: "Cooling demand"
(Digital compressor run: (0V/open =
Stop; 24V/closed = Control Start;)
J: Transformer Class II, 24VAC secondary /
25VA min. Model ECT-323
EC3-D72
K: Third party controller (can use the suction
pressure (4-20mA) analog output signal
from EC3)
L: Pump down relay, dry contact. Relay is
energized during normal operation.
M: Digital input 2: "Comp. 2 running" (0V/
open = Comp2 stop; 24V/closed =
Comp2 running
N: Discharge Temp. Sensor
O: 0-10V Digital Scroll capacity
demand signal from system
controller
P: ECN-N60 Coil out sensor