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
G e n e r a l i n f o r m a t i o n :
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.
S a f e t y i n s t r u c t i o n s :
•
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.
M o u n t i n g p o s i t i o n :
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.
M o u n t i n g o f E C D - 0 0 2 :
•
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.
E l e c t r i c a l I n s t a l l a t i o n :
•
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.
W i r i n g :
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
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