Emerson Copeland Eazycool OMTE-90D-TFD Instruction Manual

Application Guidelines
Copeland Eazycool™
Large Outdoor Condensing Unit

C6.1.9/0219/E
About these guidelines ................................................................................................ 1
1Safety instructions............................................................................................ 1
1.1 Icon explanation.................................................................................................................1
1.2 Safety statements ..............................................................................................................1
1.3 General instructions...........................................................................................................2
2Product description .......................................................................................... 3
2.1 Common information about Copeland EazyCool™ Large Outdoor Condensing units .....3
2.2 EU Ecodesign Directive 2009/125/EC...............................................................................3
2.3 Product range ....................................................................................................................3
2.4 Product nameplate.............................................................................................................4
2.5 Nomenclature.....................................................................................................................4
2.6 Application range ...............................................................................................................5
2.6.1 Qualified refrigerants and oils ................................................................................5
2.6.2 Application limits.....................................................................................................5
2.7 Main component description..............................................................................................6
2.7.1 Bill of material 501 –General description ..............................................................6
2.7.2 Bill of material 502 –General description ..............................................................6
2.7.3 Compressor............................................................................................................6
2.7.4 Electrical cabinet ....................................................................................................7
2.7.5 Condenser fan(s)....................................................................................................7
2.7.6 Housing ..................................................................................................................7
2.7.7 P&I diagram for OMTE-76D & OMTE-90D units....................................................8
2.7.8 P&I diagram for OMTE-152D units ........................................................................9
2.7.9 P&I diagram for OLTE-82D units .........................................................................10
2.8 XCM25D Electronic controller –Features .......................................................................11
2.8.1 Description ...........................................................................................................11
2.8.2 Functionality .........................................................................................................11
2.8.3 Main control & safety features..............................................................................12
2.9 XCM25D Electronic controller –Programming................................................................13
2.9.1 Programming the local display.............................................................................13
2.9.2 Remote display CCM60 .......................................................................................14
2.9.3 Single commands.................................................................................................15
2.9.4 Double commands –Entering programming level 1 "Pr1"...................................15
2.9.5 How to program the parameters (Pr1 and Pr2)....................................................15
2.9.6 Entering programming level 2 "Pr2".....................................................................16
2.9.7 Fast access menu ................................................................................................16
2.10 Controller keyboard..........................................................................................................17
2.10.1 How to lock the keyboard.....................................................................................17
2.10.2 How to unlock the keyboard.................................................................................17
2.11 Parameters level 1 –Required settings...........................................................................17

C6.1.9/0219/E
2.12 Digital operation...............................................................................................................17
2.13 Rescue mode (emergency mode) ...................................................................................18
2.13.1 Functionality .........................................................................................................18
2.13.2 PS1 –Setpoint adjustment low-pressure switch in rescue mode........................19
2.13.3 Fan operation in rescue mode .............................................................................20
2.14 Heat recovery mode –Optional.......................................................................................20
2.15 Pumpdown –General ......................................................................................................21
2.16 Reset to factory settings –Emerson "Hot Key" ...............................................................21
2.16.1 How to save factory settings or user settings ......................................................21
2.16.2 Applicable hot key for OM & OL units with XCM25D controller...........................21
2.16.3 Location of the "Hot Key" plug connection on the XCM25D controller ................22
2.16.4 How to program a "Hot Key" from the controller (upload)....................................22
2.16.5 How to program a controller using an Emerson "Hot Key" (download) ...............22
2.17 Troubleshooting –Alarm history......................................................................................23
2.18 Compressor motor protection ..........................................................................................24
2.19 System pressure protection.............................................................................................24
2.19.1 High-pressure safety switch.................................................................................24
2.19.2 High-pressure: pressure relief valve ....................................................................24
2.19.3 Low-pressure safety switch..................................................................................24
2.20 Other inputs of the XCM25D controller............................................................................24
2.20.1 Heat recovery mode.............................................................................................24
2.20.2 Ambient temperature sensor................................................................................24
2.20.3 Refrigerant level control –Leak detection device ................................................24
2.20.4 Fan failure –Fan feedback...................................................................................24
2.21 Output of the XCM25D controller –Alarm output (DO5).................................................24
3Installation....................................................................................................... 25
3.1 Condensing unit handling ................................................................................................25
3.1.1 Transport and storage..........................................................................................25
3.1.2 Dimensions in mm................................................................................................25
3.1.3 Weights.................................................................................................................26
3.1.4 Lifting....................................................................................................................27
3.2 Electrical connection........................................................................................................27
3.2.1 Power supply connections....................................................................................27
3.2.2 Maximum operating currents for cable selection .................................................28
3.2.3 Electrical wiring ....................................................................................................28
3.2.4 Electrical protection standard (protection class) ..................................................28
3.3 Refrigeration piping connections .....................................................................................28
3.3.1 Refrigeration piping installation............................................................................28
3.3.2 Connection sizes..................................................................................................29
3.3.3 Brazing recommendations....................................................................................29
3.3.4 Brazing procedure................................................................................................30

C6.1.9/0219/E
3.4 Location & fixings.............................................................................................................30
3.5 Required distances ..........................................................................................................31
4Starting up & operation................................................................................... 32
4.1 Evacuation .......................................................................................................................32
4.2 Charging procedure .........................................................................................................32
4.2.1 Refrigerant charging procedure ...........................................................................32
4.2.2 Charging level in liquid receiver ...........................................................................33
4.2.3 Oil charging procedure.........................................................................................33
4.3 Rotation direction of Scroll compressors.........................................................................33
4.4 Maximum compressor cycle ............................................................................................34
4.5 Checks before starting & during operation ......................................................................34
5Maintenance & repair...................................................................................... 35
5.1 Opening the unit housing.................................................................................................35
5.1.1 To open the electrical cabinet ..............................................................................35
5.1.2 To open the compressor chamber .......................................................................35
5.1.3 To remove the fan safety grid ..............................................................................35
5.1.4 To access the inner parts of the condenser / gas cooler .....................................36
5.2 Replacing a compressor..................................................................................................36
5.3 Condenser fins.................................................................................................................36
5.4 Electrical connections......................................................................................................37
5.5 Routine leak testing .........................................................................................................37
5.6 Condenser fan(s) & motor(s) ...........................................................................................37
6Certification & approval.................................................................................. 37
7Dismantling & disposal................................................................................... 37
DISCLAIMER ............................................................................................................... 38
Appendix 1: Parameter list level 1 (Pr1).................................................................... 39
Appendix 2: Alarm menu............................................................................................ 40
Appendix 3: Temperature / resistance curve for B7 Sensor (customer option)..... 47
Appendix 4: List of tables and figures ...................................................................... 48

C6.1.9/0219/E 1
About these guidelines
The purpose of these application guidelines is to provide guidance in the application of Copeland
EazyCool™ Large Outdoor condensing units OMTE & OLTE. They are intended to answer the
questions raised while designing, assembling and operating a system with these products.
Besides the support they provide, the instructions listed herein are also critical for the proper and
safe functioning of the condensing units. Emerson will not guarantee the performance and reliability
of the product if it is misused in regard of these guidelines.
These application guidelines cover stationary applications only. For mobile applications, contact
Application Engineering as other considerations may apply.
1 Safety instructions
Copeland EazyCool™ Large Outdoor condensing units are manufactured according to the latest
European and US Safety Standards. Particular emphasis has been placed on the user's safety.
These condensing units are intended for installation in machines and systems according to the
Machinery directive MD 2006/42/EC. They may be put to service only if they have been installed in
these systems according to instructions and conform to the corresponding provisions of legislation.
For relevant standards please refer to the Manufacturer’s Declaration, available at
www.climate.emerson.com/en-gb.
These instructions should be retained throughout the lifetime of both the compressor and the
condensing unit.
You are strongly advised to follow these safety instructions.
1.1 Icon explanation
WARNING
This icon indicates instructions to
avoid personal injury and material
damage.
CAUTION
This icon indicates instructions to avoid
property damage and possible
personal injury.
High voltage
This icon indicates operations with a
danger of electric shock.
IMPORTANT
This icon indicates instructions to avoid
malfunction of the compressor.
Danger of burning or frost burn
This icon indicates operations with a
danger of burning or frost burn.
NOTE
This word indicates a recommendation
for easier operation.
Explosion hazard
This icon indicates operations with a
danger of explosion.
1.2 Safety statements
▪Refrigerant compressors and units must be used in accordance with their intended use.
▪Only qualified and authorized HVAC or refrigeration personnel are permitted to install,
commission and maintain this equipment.
▪Electrical connections must be made by qualified electrical personnel.
▪All valid standards for connecting electrical and refrigeration equipment must be
observed.
▪The national legislation and regulations regarding personnel protection must be
observed.
Use personal safety equipment. Safety goggles, gloves,
protective clothing, safety boots and hard hats should be worn where
necessary.

2 C6.1.9/0219/E
1.3 General instructions
WARNING
System breakdown! Personal injuries! Never install a system in the field and
leave it unattended when it has no charge, a holding charge, or with the service
valves closed without electrically locking out the system.
System breakdown! Personal injuries! Only approved refrigerants and
refrigeration oils must be used.
WARNING
High shell temperature! Burning! Do not touch the compressor until it has
cooled down. Ensure that other materials in the area of the compressor do not
get in touch with it. Lock and mark accessible sections.
CAUTION
Overheating! Bearing damage! Do not operate compressors without
refrigerant charge or without being connected to the system.
CAUTION
Contact with POE! Material damage! POE lubricant must be handled
carefully and the proper protective equipment (gloves, eye protection, etc.)
must be used at all times. POE must not come into contact with any surface or
material that it might damage, including without limitation, certain polymers, eg,
PVC/CPVC and polycarbonate.
IMPORTANT
Transit damage! Compressor malfunction! Use original packaging. Avoid
collisions and tilting.
The contractor is responsible for the installation of the unit and should check the following points:
▪Sufficient liquid sub-cooling in the line to the expansion valve(s) to avoid "flash-gas" in the liquid
line;
▪Sufficient amount of oil in the compressor (in case of long piping additional oil must be charged).

C6.1.9/0219/E 3
2 Product description
2.1 Common information about Copeland EazyCool™ Large Outdoor Condensing
units
Emerson has developed the Copeland EazyCool™ Large Outdoor Condensing unit of second
generation to meet primarily the demands of the food retail and food service sectors. It is a
refrigeration air-cooled condensing unit that uses the latest Copeland™brand products patented
Scroll technology as the main driver and has electronic protection and diagnostics features built in
the compact chassis. The combination of large condensers and low-speed fans allows for particularly
quiet operation.
Figure 1: Front view of large outdoor condensing unit
2.2 EU Ecodesign Directive 2009/125/EC
The European Directive 2009/125/EC with regard to Ecodesign requirements for professional
refrigerated storage cabinets, blast cabinets, condensing units and process chillers requires
manufacturers to decrease the energy consumption of their products by establishing minimum
energy efficiency standards. Copeland brand products condensing units are prepared and optimized
to meet the requirements of the Ecodesign Directive. The integrated variable speed fan and
condenser reduce the noise level and energy consumption significantly. This, combined with
Copeland Scroll technology, allows for high-efficiency operation.
For the rated cooling capacity, rated power input and rated COP value please refer to Copeland™
brand products Select software at www.climate.emerson.com/en-gb.
These guidelines meet the requirements of Regulation 2015/1095, Annex V, section 2(a), with regard
to product information, namely:
▪(v) See chapter 2.6 "Application range"
▪(vi) See chapters 5.3 "Condenser fins" and 5.5 "Routine leak testing"
▪(vii) See chapters 2.8.3 "Main control & safety features" and 4.2 "Charging procedure"
▪(viii) See chapter 7 "Dismantling & disposal"
2.3 Product range
Copeland EazyCool™ Large Outdoor Condensing units are released for multiple refrigerants. They
are available in two cabinet sizes and are equipped with one or two fans. Depending on the
compressors in use they are designed for medium temperature or low temperature refrigeration
applications.
Condensing
unit
Displacement
@ 100%
[m³/h]
Cooling
capacity
[kW]
Outer dimensions
length/width/height
with closed cover [mm]
Net
weight
[kg]
Power
supply
OMTE-76D-TFD
28.8
16.8
1574 / 920 / 1150
374
3/N/PE~50Hz
400/230V
TN-S
OMTE-90D-TFD
34.2
19.5
377
OMTE-152D-TFD
57.6
35.8
2303 / 900 / 1150
490
OLTE-82D-TFD
70.6
13.3
500
* for OM with MT standard conditions: to= -10°C; tamb = 32°C; suction gas temp = 20°C, R449A
* for OL with LT standard conditions: to= -35°C; tamb = 32°C; suction gas temp = 20°C, R449A
Preliminary data
Table 1: Product range overview

4 C6.1.9/0219/E
2.4 Product nameplate
The condensing unit nameplate shows model designation and serial number, as well as locked rotor
amps, maximum operating current, safety pressures and weight.
The compressor has its own nameplate with all electrical characteristics.
Figure 2: Unit nameplate
2.5 Nomenclature
The model designation contains the following technical information about Copeland EazyCool Large
Outdoor condensing units:
Figure 3: Nomenclature OM & OL units

C6.1.9/0219/E 5
2.6 Application range
2.6.1 Qualified refrigerants and oils
Qualified
refrigerants
R404A, R407A, R407F, R507, R448A, R449A
R134a*, R450A*, R513A* (* = Not for OLTE)
Qualified
servicing oils
Emkarate RL 32 3MAF
Mobil EAL Arctic 22CC
Table 2: Qualified refrigerants and oils
Unit
OMTE-76D-TFD
OMTE-90D-TFD
OMTE-152D-TFD
OLTE-82D-TFD
Compressor
ZBD38KCE-TFD-551
ZBD45KCE-TFD-551
ZB/D76K5E-TFD-567
ZF/D41K5E-TFD-567
Single
compressor
oil charge
3.37
3.37
3.37
3.37
Pre-charge oil
separator
3.8
3.8
Total oil
charge of unit
10.54
10.54
Table 3: Oil charge in litres
WARNING
Use of R450A and R513A refrigerants! Risk of compressor damage!
Migration of R450A or R513A refrigerant into the compressor crankcase could
cause low oil viscosity, which could lead to compressor damage. When using
R450A or R513A it is critical to meet the following requirements:
▪maintain adequate superheat settings with a minimum superheat of 8-10K;
▪no liquid refrigerant migration into the compressor at any time, especially
during standstill, during or after defrosting, or after reverse mode;
▪the use of a crankcase heater is mandatory;
▪retrofit to R450A and R513A is only allowed for compressors which are
approved for these refrigerants.
Contact your local Application Engineering representative for any further
information.
NOTE: OMTE & OLTE units are equipped with an oil separator. This separator is pre-charged
with 3.8 litres of oil.
2.6.2 Application limits
WARNING
Compressor breakdown! Oil dilution due to low superheat! Low suction
superheat leads to oil dilution. Always operate the system with adequate
superheat to avoid viscosity decrease of the oil. Additional measures in system
design might help to avoid inacceptable lubrication conditions.
For application envelopes, please refer to the compressor application envelopes which can be found
in Copeland™brand products Select software, available at www.climate.emerson.com/en-gb.
OMTE & OLTE condensing units can be used at ambient temperatures down to -15°C. The
application envelope of the unit must be respected under all operating conditions. For lower ambient
temperatures please contact your local Application Engineering representative.

6 C6.1.9/0219/E
2.7 Main component description
Figure 4: Main components of Large Outdoor Condensing units
2.7.1 Bill of material 501 –General description
The standard bill of material for OMTE & OLTE units is 501. In general, these units have an air-
cooled condenser with 1 or 2 EC-fans for condensing temperature control.
A Tandem set of 2 Scroll compressors (ZB** for OMTE units, ZF** for OLTE units) provides the
required cooling capacity. OLTE units have single Digital compressors with LIV technology inside.
In Tandems one of the compressors is always a Digital Scroll, which allows modulation to very low
part-load conditions.
All compressors are equipped with a high-efficiency sound shell for best sound performance.
An oil management system with a combined oil separator (including the reservoir) and oil injection
devices secure sufficient compressor oil levels. Unit models OMTE-76D and OMTE-90D have only
the oil separator with oil return into the suction line.
An electronic controller XCM25D takes care for suction pressure regulation, fan speed control in
standard and heat recovery conditions, as well as for system safety.
Main safety features provided by the unit: compressor oil level control (only for OMTE-152D),
discharge temperature protection, voltage sensing, refrigerant charge level control and high- and
low-pressure safety.
2.7.2 Bill of material 502 –General description
The 502 bill of material is a version which is prearranged for heat recovery (HR). Mechanically the
unit has connections for external piping in the discharge line. An additional ball valve between the 2
connection ports allows the manual activation of the heat recovery functionality –please also see PI
diagrams in Chapter 2.7.
For HR activation the controller settings need to be adjusted. The controller hardware remains the
same as in the standard unit –see chapter 2.14 "Heat recovery mode –Optional" for details.
All other features and equipment are the same as in version 501.
2.7.3 Compressor
Unit
Digital Scroll
Standard Scroll
OMTE-90D-TFD-501
ZBD45KCE-TFD-551
ZB45KCE-TFD-551
OMTE-76D-TFD-501
ZBD38KCE-TFD-551
ZB38KCE-TFD-551
OMTE-152D-TFD-501
ZBD76K5E-TFD-567
ZB76K5E-TFD-567
OLTE-82D-TFD-501
ZFD41K5E-TFD-567
ZF41K5E-TFD-567
Table 4: Compressor model overview

C6.1.9/0219/E 7
2.7.4 Electrical cabinet
Figure 5: Electrical cabinet
2.7.5 Condenser fan(s)
The condensers of the OMTE & OLTE condensing units are equipped with electronically commutated
(EC) external rotor motor with integrated EC controller:
▪Integrated motor contactor, active temperature management
▪Interference emissions EN 61000-6-3
▪Interference immunity EN 61000-6-2
▪Protection rating IP20, IP54
▪Satisfies IE4 (IEC60034-31) efficiency class
▪Extremely energy efficient as a result of EC technology
▪Compact, modular design
▪Straightforward installation and commissioning
▪Flexible customer interface, easy to expand
The fan type on OMTE & OLTE condensing units is FN071-ZIQ.DG.V7P3.
2.7.6 Housing
Copeland EazyCool Large Outdoor condensing units OMTE & OLTE with BOM 501 have the
following housing features:
▪Redesigned E-Box, accessible via a hinged cover with two positions (45° & 90°)
▪Easy and service-friendly access to compressor compartment
▪Easy and service-friendly access to liquid receiver/filter drier/sight glass area
▪Easy cleaning of condenser section
Figure 6: OMTE & OLTE unit housing

8 C6.1.9/0219/E
2.7.7 P&I diagram for OMTE-76D & OMTE-90D units
Figure 7: P&I diagram for OMTE-76D & OMTE-90D
Position
Description
Comments
B1
PT P1 Pressure transmitter suction (AI1)
PPR15
B2
Condensing pressure transmitter (AI2)
PPR30
B3
DLT Discharge line temperature sensor (AI3)
NTC 86k
B6
Ambient temperature probe (AI6)
NTC 10k
B7
Liquid receiver with liquid level watch
LW4-L120 Alco
B10
PSL >> LP Mechanical low-pressure switch PS1 (PSL)
PS1-A3A Alco
B11
TT >> DLT Discharge line thermostat 130°C compressor 1
B12
TT >> DLT Discharge line thermostat 130°C compressor 2
B21
PSH >> High-pressure cut-out device compressor 1
PS3-W6S Alco
B22
PSH >> High-pressure cut-out device compressor 2
PS3-W6S Alco
E1
Crankcase heater compressor 1
E2
Crankcase heater compressor 2
M1
High-efficiency Digital Scroll compressor ZBD family
Compressor 1
M2
High-efficiency standard Scroll compressor ZB family
Compressor 2
M3
High-efficiency EC fan
FN071-ZIQ
M4
High-efficiency EC fan
FN071-ZIQ
Y1
Digital control solenoid valve
Table 5: Legend of the P&I diagram for OMTE-76D & OMTE-90D units

C6.1.9/0219/E 9
2.7.8 P&I diagram for OMTE-152D units
Figure 8: P&I diagram for OMTE-152D
Position
Description
Comments
B1
PT P1 Pressure transmitter suction (AI1)
PPR15
B2
Condensing pressure transmitter (AI2)
PPR30
B3
DLT Discharge line temperature sensor (AI3)
NTC 86k
B6
Ambient temperature probe (AI6)
NTC 10k
B7
Liquid receiver with liquid level watch
LW4-L120 Alco
B10
PSL >> LP Mechanical low-pressure switch PS1 (PSL)
PS1-A3A Alco
B11
TT >> DLT Discharge line thermostat 130°C compressor 1
B12
TT >> DLT Discharge line thermostat 130°C compressor 2
B21
PSH >> High-pressure cut-out device compressor 1
PS3-W6S Alco
B22
PSH >> High-pressure cut-out device compressor 2
PS3-W6S Alco
E1
Crankcase heater compressor 1
E2
Crankcase heater compressor 2
M1
High-efficiency Digital Scroll compressor ZBD family
Compressor 1
M2
High-efficiency standard Scroll compressor ZB family
Compressor 2
M3
High-efficiency EC fan
FN071-ZIQ
M4
High-efficiency EC fan
FN071-ZIQ
Y1
Digital control solenoid valve
Y3
TraxOil active oil management device compressor 1
OM3-CCE
Y4
TraxOil active oil management device compressor 2
OM3-CCE
Table 6: Legend of the P&I diagram for OMTE-152D units

10 C6.1.9/0219/E
2.7.9 P&I diagram for OLTE-82D units
Figure 9: P&I diagram for OLTE units
Position
Description
Comments
B1
PT P1 Pressure transmitter suction (AI1)
PPR15
B2
Condensing pressure transmitter (AI2)
PPR30
B3
DLT Discharge line temperature sensor (AI3)
NTC 86k
B6
Ambient temperature probe (AI6)
NTC 10k
B7
Liquid receiver with liquid level watch
LW4-L120 Alco
B10
PSL >> LP Mechanical low-pressure switch PS1 (PSL)
PS1-A3A Alco
B11
TT >> DLT Discharge line thermostat 130°C compressor 1
B12
TT >> DLT Discharge line thermostat 130°C compressor 2
B21
PSH >> High-pressure cut-out device compressor 1
PS3-W6S Alco
B22
PSH >> High-pressure cut-out device compressor 2
PS3-W6S Alco
E1
Crankcase heater compressor 1
E2
Crankcase heater compressor 2
M1
High-efficiency Digital Scroll compressor ZBD family
Compressor 1
M2
High-efficiency standard Scroll compressor ZB family
Compressor 2
M3
High-efficiency EC fan
FN071-ZIQ
M4
High-efficiency EC fan
FN071-ZIQ
Y1
Digital control solenoid valve
Y2
Solenoid valve used for liquid injection
Y3
TraxOil active oil management device compressor 1
OM3-CCE
Y4
TraxOil active oil management device compressor 2
OM3-CCE
Table 7: Legend of the P&I diagram for OLTE-82D units

C6.1.9/0219/E 11
2.8 XCM25D Electronic controller –Features
The XCM25D controller is designed to be a powerful, flexible controller for use in multiple
applications. It has been developed for condensing units and allows the adjustment of all relevant
parameters by the user.
2.8.1 Description
WARNING
Electrical shock hazard! Serious personal injuries! There are unused fast-
on pins (C1 & DO2) on the XCM25D which could be under voltage. They are
covered by insulated fast-on flags in the factory. Handle carefully when
removing insulating flags during service on site.
The controller is designed for usage in an outdoor refrigeration unit. It is rated to be used for the
following environment:
▪Outdoor controller ambient temperature for operation: -40C to 60C
▪Ambient temperature for storage: -40C to 80C
▪Maximum humidity: 90% at 48C (non-condensing)
▪Board power: 24V AC +15%/-20%
▪Voltage sensing capabilities - Single phase: 100-120, 200-240V AC ± 10%
▪Voltage sensing capabilities - Three phase: 200-240, 380-460, 575V AC ± 10%
The units of measure are selectable. The factory default unit is [bar] (always considered relative) for
pressure and [°C] for temperature.
Figure 10: Electronic controller
2.8.2 Functionality
The controller allows for easy commissioning by the technician with the factory settings at the highest
program level. It also offers the possibility to make substantial changes to the system optimization in
further programming levels. Advanced functionality can also be activated.
The following functions are covered by the controller:
▪Condensing unit control, including tandem management
▪Condenser fan control
▪Voltage and current sensing (compressor protection)
▪Digital compressor control
NOTE: The XCM25D controller on OM & OL units includes all the functions necessary for unit
control. For additional functionalities please contact your local Application Engineering
representative.

12 C6.1.9/0219/E
Figure 11: XCM25D controller functionality overview
2.8.3 Main control & safety features
Suction pressure control: Each unit is equipped with a suction pressure transmitter. The XCM25D
controls the suction pressure by evaluating the input signal of the pressure transmitter. The suction
pressure regulation for OMTE or OLTE units must be defined by the setpoint (C16) and proportional
band (C17). The signal of the suction pressure transmitter is also used for additional functionalities.
Condensing pressure control: Each unit is equipped with a high-pressure transmitter. The
XCM25D controls the condensing pressure by regulating the fan speed corresponding to the ambient
temperature. The unit controller regulates the condensing pressure with a constant temperature
difference to the ambient ("floating HP"; factory setting E66 = 8K).
Different control options are available. As soon as fan modulation is enabled (E01 = "2-Modulated
fan") parameter E38 allows to choose "floating HP" (factory setting) or control of condensing
temperature inside compressor envelope. In this mode, the compressor can run different minimum
condensing temperatures based on the suction pressure of the compressor. This is the most energy-
efficient way to minimize the condensing temperature as much as possible. But it also means that
the fan is running full speed more often than in floating HP mode.
Automatic liquid injection on OLTE: A mechanical injection valve (LIV) allows liquid refrigerant to
be injected into the scroll set of the compressor to reduce discharge temperatures generated when
the unit operates at increasing compression ratios. There is a bulb on each compressor top cap
connected to the injection valve which allows individual regulation for each compressor. On Digital
models a solenoid valve (normally closed NC) is energized in parallel to the digital modulation
solenoid valve to avoid injection during part-load conditions. The discharge line protection achieved
with discharge line thermostats (B11 & B12; Klixon), installed directly on the discharge pipe.
Compressor phase reversal: Ensures that the compressors keep running in one direction only
(clockwise = right rotation) –necessary for a compliant Scroll compressor to compress and pump
refrigerant. Reset is automatic once the phase rotation is correct for the compressor.
Motor current overload protection: The motor current overload protection is achieved by
adjustable motor circuit breaker Q02 & Q03.
Fixed high-pressure switches: This is a non-adjustable protection device designed to prevent the
compressor from operating outside of its safe high-pressure range. Reset is automatic.
▪OMTE & OLTE models: 28.8 bar cut-out / 24 bar cut-in.
The high-pressure cut-out device is in the same safety chain as the discharge line thermostat. The
alarm provided by the XCM25D does not indicate if it is high pressure or high discharge temperature
alarm.
Adjustable high-pressure limitation: The unit controller provides the possibility to stop the unit at
a critical discharge pressure which is lower than the cut-out value of the fixed high-pressure switch.
High-pressure alarm value can be adjusted by parameter E58.
Discharge temperature protection: Each unit is equipped with a discharge line thermostats (DLT).
The DLT’s are in the same safety chain as the high-pressure cut-out switches and a common alarm.
Each compressor has its own safety chain. In addition, there is a discharge line sensor installed on
Condenser fan
control
Digital Scroll
control
Superheat
control
Liquid injection
Alarm
management
Electrical
protection
Monitoring of the discharge
line temperature

C6.1.9/0219/E 13
the discharge pipe of the digital compressor. The controller is using the signal from this sensor for
control purposes as well as safety functions.
Adjustable low-pressure alarm: The unit controller features an adjustable low-pressure alarm
managed by the suction pressure sensor. The factory setting of this alarm is the lowest permitted
pressure of the refrigerant with the lowest pressure-vapour properties. If needed the user can modify
this value as per the required application.
▪OMTE models: 0.8 bar rel
▪OLTE models: 0.3 bar rel
Adjustable low-pressure switches PS1: In case of controller breakdown, the low-pressure switch
is used for emergency operation (prewired rescue mode components). It must be adjusted depending
on running conditions and potential special requirements. The compressor envelopes published in
Select must always be respected. Further information can be found in chapter 2.13 "Rescue mode
(emergency mode)".
In standard operation mode the low-pressure switch will work for both compressors as a protection
device.
The crankcase heater(s) is connected directly to the controller. The crankcase heater will be
energized when the ambient sensor is below a given value (10°C) and the compressor has been off
for a period of 5 minutes. The minimum off time does not apply at initial power up.
Liquid line assembly: filter drier and sight glass/moisture indicator.
2.9 XCM25D Electronic controller –Programming
CAUTION
Low refrigerant charge! Compressor damage! Never energize the
unit/controller without minimum refrigerant system charge. There is a risk of
malfunction of the controller in deep vacuum operation which can cause
compressor damage.
2.9.1 Programming the local display
Figure 12: Local display
LED
Mode
Function
On
Compressor 1 enabled
Flashing
Anti-short cycle delay enabled
On
Condensing fans enabled
On
Bar display
Flashing
Programming mode
On
PSI display
Flashing
Programming mode
On
When browsing the service menu
Flashing
In fast access menu
On
When browsing the alarm menu
Flashing
A new alarm occurred
On
An alarm is occurring

14 C6.1.9/0219/E
LED
Mode
Function
On
Digital unloader solenoid On
On
In defrost
On
Evaporator fans - Liquid line solenoid valve On
Table 8: LED functions description
NOTE: By default, the local display will show the value of the suction pressure during
operation. This can be changed by choosing another value for parameter B03 (Remote
Display visualization).
Setting for
B03
Value shown on the display
Comments
0
P1 value = Suction pressure
1
P2 value = Mid-coil temperature (condenser)
2
P3 value = Discharge line temperature
3
P4 value = nu
Not available
4
P5 value = Liquid switch
Not available
5
P6 value = Ambient temperature
6
P7 value = Rescue mode
7
PEr value = Probe error
8
Aou value = Analog output
Table 9: Display visualisation
2.9.2 Remote display CCM60
This device allows for remote monitoring and control of the XCM25D controller via cable. The CCM60
has the same interface as the unit controller therefore the commands and symbols are identical to
those of the XCM25D controller. The remote display shall be mounted on a vertical panel, in a 29 x
71 mm hole, and secured using the special bracket supplied (see Figure 13).
The temperature range allowed for correct operation is 0°C to +60°C.
Avoid places subject to strong vibrations, corrosive gases, excessive dirt or humidity. Allow for air to
circulate through the cooling holes.
When front mounted the remote display is IP65 rated.
Figure 13: Remote display front panel mounting
The remote display is a proprietary bus of communication for Dixell HMI (x-rep, CCM60) interfaces.
There are two connection terminals on the back of the remote display (+ and -).
NOTE: Emerson recommends using a shielded cable twisted pair 2 x 0.5mm².

C6.1.9/0219/E 15
The device must be connected to the VNR-terminal on the unit controller according to the polarity.
Figure 14 shows the VNR terminal on the unit controller.
Figure 14: VNR connection for the remote display
Before connecting cables make sure the power supply complies with the hardware requirements.
Separate the terminal cables from the power supply cables, the outputs and the power connections.
2.9.3 Single commands
Press the SET button to display the target setpoint. In programming mode, this
allows to select a parameter or to confirm an operation.
Press the RESET button and hold for 5 seconds to reset any lockouts if the
current state of the controller allows for it to be reset.
(UP) To view the fast access menu. In programming mode, this browses the
parameter codes or increases the displayed value.
(DOWN) In programming mode, this browses the parameter codes or decreases
the displayed value.
(SERVICE) To enter the service and alarm menu.
Hold for 3 seconds to start a manual defrost or terminate an active defrost.
Table 10: Single commands
2.9.4 Double commands –Entering programming level 1 "Pr1"
Press simultaneously for about 3 seconds to lock (PoF) or unlock (Pon) the
keyboard.
Press simultaneously to leave the programming mode or menu. On submenus
rtC and EEV this combination allows to go back to the previous level.
Press simultaneously for about 3 seconds to access the first level of
programming mode.
Table 11: Double commands
The device provides 2 programming levels:
▪Pr1 with direct access
▪Pr2 protected with a password (intended for experts)
2.9.5 How to program the parameters (Pr1 and Pr2)
Access pre-
program level
Press simultaneously for about 3 seconds to access the pre-
programming level. The message rtC (real time clock) appears.
Access
program level
or
Press the Up or Down key until the message Par appears.
Access Pr1
Press the SET button to enter the program level. First parameter
C01 appears.
Select item
or
Select the parameter or submenu using the arrows.
Show value
Press the SET button.
Modify
or
Use the arrows to modify the value.
VNR connection for
the remote display