Emerson EC3-D72 User Manual

Operating instruction
EC3-D7x Digital Superheat Controller
EC3-D72 with TCP/IP communication capability
Emerson Climate Technologies GmbH www.emersonclimate.eu
Am Borsigturm 31 I 13507 Berlin I Germany Date: 18.07.2017 EC3-D7x_OI_ML_R06_865019.docx
General information:
EC3-D72 is the superheat controller with TCP/IP connection for stepper motor
driven Electrical Control Valves EX4-6 from EMERSON 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.
Safety instructions:
• Read operating instructions thoroughly. Failure to comply can result in device
failure, system damage or personal injury.
• According to EN 13313 it is intended for use by persons having the
appropriate knowledge and skill.
• Do not exceed the specified maximum ratings for pressure, temperature,
voltage and current.
• Before installation or service disconnect all voltages from system and device.
• Do not operate system before all cable connections are completed.
• Entire electrical connections have to comply with local regulations.
Note: The EC3-D7x series contains a VRLA battery = valve regulated rechargeable
lead-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 (harmonized directive 2012/19/EU). For further
information contact your local environmental recycling center.
Mounting position:
The EC3-D7x is designed to be mounted onto a standard DIN rail. Mounting
position: on vertical walls, with stepper motor connector on top side only.
Mounting of ECD-002:
• ECD-002 can be installed at any time also during operation.
• ECD-002 can be mounted in panels with
71x29 mm cutout.
• Push controller into panel cut-out.(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 keypad is
secured. Do not over tighten as mounting lugs
will break easily.
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 6.3 mm spade connector.
• Keep controller and sensor wiring well separated from mains wiring. Minimum
recommended distance 30 mm.
• Use a class II category transformer for 24 VAC power supply. Do not ground the
24 VAC lines. We recommend using individual transformers for EC3 controller(s)
and for 3
rd
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.
• 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.
• If the output relay is not utilized, the user must ensure appropriate safety pre-
cautions are in place to protect the system against damage caused by a power
failure.
• In order to provide system protection in the event of power loss, it is recommended
to change the battery annually.
Digital input status is dependent to operation of compressor/0-10V input
System
Operating
condition
Digital Inputs
0-10V input from third party
controller
C1 &
C2 in stop mode
“Cooling demand” open (0 V)
“Comp 2 Running” open (0 V)
EXV remains closed irrespective
of voltage input value
C1 in run &
C2 in stop mode
“Cooling demand” closed (24
V)
“Comp 2 Running” open (0
V)
EXV active
Input = 0V: dig. valve capacity =
10% default capacity.
If dig. comp. is in by-pass,
EXV will:
- close if capacity is <70%
- be inhibited if capacity is
>70%
C1 &
C2 in run mode
“Cooling demand” closed (24 V)
“Comp 2 Running” closed (24
V)
EXV active
EXV always modulates
even when
the dig. compr. is in by-pass mode.
C1 in stop &
C2 starts run
mode
“Cooling demand” open (0 V)
“Comp
2 Running” closed (24 V)
EXV remains closed irrespective
of voltage input value
Note 1: C1 = Compressor 1, C2 = Compressor 2
Note 2: Digital comp. should always be regarded as base load compressor 1.
Wiring:
A: White wire
B: Black wire
C: Blue wire
D: Brown wire
E: M12 Plug cable assembly EXV-Mxx for connection to EX4-6
F: 24 V Triac output to PWM Digital Scroll valve
G: Remote control panel, system controller.
H: Alarm relay, dry contact. Relay coil is not energized at alarm or power off.
I: Digital input “Cooling demand” (0 V/open = Stop; 24 V/closed = Start)
J: Transformer Class II, 24 VAC secondary / 25 VA
K: Third party controller (can use the analog output signal from EC3)
L: Pump down relay, dry contact. Relay is energized during normal operation
M: Digital input 2: “Comp 2 running”
(0 V/ open = Comp 2 stop; 24 V /closed = Comp. 2 running)
N: Discharge Temp. Sensor Copeland® NTC
O: 0-10 V Digital Scroll capacity demand signal from system controller
P: ECN-N60 Temperature sensor
!

Emerson EC3-D72 Specifications

General

Brand	Emerson
Model	EC3-D72
Category	Controller
Language	English