G e n e r a l i n f o r m a t i o n :
EXD-HP1/2 are stand-alone superheat and or economizer controllers. EXD-HP1 is intended
for operation of one EXM/EXL or EXN valve whereas EXD-HP2 is designed for operation
of two independent EXM/EXL or two EXN valves.
NOTE: It is possible to use only circuit 1 from EXD-HP2. In this case, the circuit 2
must be disabled (C2 parameter) and the sensors and the valve for the second circuit
are not needed.
ModBus communication is described in a Technical Bulletin and it is not covered by
this document.
WARNING -Flammable refrigerants:
EXD-HP1/2 has a potential ignition source and does not comply with ATEX
requirements. Installation only in non-explosive environment. For flammable
refrigerants only use valves and accessories approved for it!
T e c h n i c a l D a t a :
Power supply
24 VAC/DC ±10 %; 1 A
EXD-HP1: 15 VA
Power consumption
EXD-HP2: 20 VA
Plug-in connector
Removable screw terminals wire size 0.14...1.5 mm
Protection class
IP20
Digital Inputs
Potential free contacts (free from voltage)
Temperature sensors
ECP-P30
Pressure sensors
PT5N
Temperatures
Operating / Ambient -10...+60 °C
Output alarm relay
SPDT contact 24 VAC 1 Amp inductive load;
24 VAC/DC 4 Amp resistive load
Activated/energized:
During normal operation (no alarm condition)
Deactivated/de-
During alarm condition or power supply is OFF
energized
Coil: EXM-125/EXL-125 or EXN-125
Stepper motor output
Valves: EXM/EXL-... or EXN-...
Type of action
1 B
Rated impulse voltage
0.5 kV
Pollution Degree
2
Mounting
For standard DIN rail
Marking
Dimensions
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.
•
This product is intended for use by qualified personnel having the appropriate
knowledge and skills like trained according to EN 13313 or a specific training for
flammable refrigerants.
•
Flammable refrigerants require special handling and care due to its flammability.
Sufficient ventilation is required during service of the system.
•
Ensure that the system is correctly labelled with applied refrigerant type and a warning
for explosion risk.
•
Contact with rapidly expanding gases can cause frostbite and eye damage. Proper
protective equipment (gloves, eye protection, etc.) has to be used.
•
Do not exceed the specified maximum ratings for 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.
•
Do not apply voltage to the controller before completion of wiring.
•
Entire electrical connections have to comply with local regulations.
•
Inputs are not isolated, potential free contacts needed to be used.
•
Disposal: Electrical and electronic waste must NOT be disposed of with other
commercial waste. Instead, it is the user responsibility to pass it to a designated
collection point for the safe recycling of Waste Electrical and Electronic Equipment
(WEEE directive 2019/19/EU). For further information, contact your local
environmental recycling center.
Emerson Climate Technologies GmbH
Pascalstrasse 65 I 52076 Aachen I Germany
O P E R A T I N G I N ST RU C T I O N S
EXD-HP1/2 Controller with
ModBus communication capability
2
www.climate.emerson.com/en-gb
E l e c t r i c a l c o n n e c t i o n a n d w i r i n g :
• Refer to the electrical wiring diagram for electrical connections.
• NOTE: Keep controller and sensor wiring well separated from supply power cables.
Minimum recommended distance 30mm.
• EXM-125, EXL-125 or EXN-125 coils are supplied with fix cable and JST terminal block
at cable end. Cut the wires close to terminal block. Remove the wire insulation
approximately 7 mm at the end. It is recommended that the wires end to be equipped
with core cable ends or metallic protective sleeve. When connecting the wires of
EXM/EXL or EXN, consider the colour coding as follows:
EXD
Terminal
EXD-HP1
6
BR
7
BL
8
OR
9
YE
10 WH
EXD-HP2
30 BR
31 BL
32 OR
33 YE
34 WH
•
The digital input DI1 (EXD-HP1) and DI1/D12 (EXD-HP1/2) are the interfaces
between
EXD-HP1/2
and
upper-level
communication has not been used. The external digital shall be operated in
function system's compressor/demand.
•
If the output relays are not utilized, the user must ensure appropriate safety
precautions are in place to protect the system.
Operating condition
Compressor starts/run
Compressor stops
NOTE: Connecting any EXD-HP1/2 inputs to the supply voltage will permanently
damage the EXD-HP1/2.
W i r i n g b a s e b o a r d ( E X D - H P 1 / 2 ) :
NOTE:
•
Base board is for function of superheat control or Economizer control.
•
Alarm relay, dry contact. Relay coil is not energized during alarm condition or power off.
•
Hot gas discharge sensor input is mandatory only for economizer control function.
WARNING: Use a class II category transformer for 24 VAC power supply. Do not
ground the 24 VAC lines. We recommend using individual transformers for EXD-
HP1/2 controller and for third party controllers to avoid possible interference or
grounding problems in the power supply.
OI_EXD-HP12_A1_A2L_A3_EN_DE_RU_Rev07_865921.docx
EXM/L-125 wire color
EXN-125 wire color
Brown
Blue
Orange
Orange
Yellow
Yellow
White
White
Brown
Blue
Orange
Orange
Yellow
Yellow
White
White
system
controller
if
Digital input status
closed (Start)
open (Stop)
Date: 21.01.2022
EN
Red
Blue
Red
Blue
the
Modbus