Installer and user
reference guide
Air-cooled refrigeration condensing unit
LRMEQ3BY1 LRMEQ4BY1
Installer and user reference guide
Air-cooled refrigeration condensing unit
English
Table of Contents
Table of Contents
1 General safety precautions
1.1
1.2
1.3
About the documentation ..........................................................
1.1.1
Meaning of warnings and symbols..............................
For the user ...............................................................................
For the installer..........................................................................
1.3.1
General .......................................................................
1.3.2
Installation site ............................................................
1.3.3
Refrigerant ..................................................................
1.3.4
Brine............................................................................
1.3.5
Water ..........................................................................
1.3.6
Electrical .....................................................................
2 About the documentation
2.1
About this document..................................................................
3
3
3
3
4
4
4
4
5
5
5
6.5
6
6.6
6.7
6
For the installer
7
3 About the box
7
3.1
3.2
Overview: About the box ...........................................................
Outdoor unit...............................................................................
3.2.1
To unpack the outdoor unit .........................................
3.2.2
To handle the outdoor unit ..........................................
3.2.3
To remove the accessories from the outdoor unit.......
3.2.4
To remove the transportation stay ..............................
4 About the units
4.1
4.2
4.3
4.4
4.5
Overview: About the units .........................................................
Identification ..............................................................................
4.2.1
Identification label: Outdoor unit .................................
About the outdoor unit ...............................................................
System layout............................................................................
Combining units and options .....................................................
4.5.1
Possible options for the outdoor unit...........................
4.5.2
About the indoor units .................................................
5 Preparation
5.1
5.2
5.3
5.4
Overview: Preparation...............................................................
Preparing the installation site ....................................................
5.2.1
Installation site requirements of the outdoor unit ........
5.2.2
Additional installation site requirements of the
outdoor unit in cold climates .......................................
5.2.3
Securing safety against refrigerant leaks....................
Preparing refrigerant piping.......................................................
5.3.1
About reusing existing piping ......................................
5.3.2
Refrigerant piping requirements..................................
5.3.3
Refrigerant piping material..........................................
5.3.4
To select the piping size .............................................
5.3.5
To select refrigerant branch kits..................................
5.3.6
Refrigerant piping length and height difference ..........
5.3.7
To select the expansion valve.....................................
Preparing electrical wiring .........................................................
5.4.1
Safety device requirements ........................................
6 Installation
6.1
6.2
6.3
6.4
Overview: Installation ................................................................
Opening the units ......................................................................
6.2.1
About opening the units ..............................................
6.2.2
To open the outdoor unit.............................................
Mounting the outdoor unit..........................................................
6.3.1
About mounting the outdoor unit.................................
6.3.2
Precautions when mounting the outdoor unit..............
6.3.3
To provide the installation structure ............................
6.3.4
To install the outdoor unit............................................
6.3.5
To prevent the outdoor unit from falling over ..............
Connecting the refrigerant piping ..............................................
Installer and user reference guide
2
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
6.8
6.9
7 Configuration
7.1
7.2
9
9
9
9
10
11
11
11
12
12
12
12
13
13
13
13
14
14
14
14
14
14
14
14
14
15
15
15
6.4.1
About connecting the refrigerant piping .......................
6.4.2
Precautions when connecting the refrigerant piping ....
6.4.3
Pipe bending guidelines...............................................
6.4.4
To braze the pipe end ..................................................
6.4.5
Using the stop valve and service port ..........................
6.4.6
To remove the pinched pipes.......................................
6.4.7
Guidelines when installing a sight glass ......................
6.4.8
Guidelines when installing a dryer ...............................
6.4.9
To connect the refrigerant piping to the outdoor unit ...
6.4.10 Guidelines when connecting piping branching.............
Checking the refrigerant piping ..................................................
6.5.1
About checking the refrigerant piping ..........................
6.5.2
Checking refrigerant piping: General guidelines ..........
6.5.3
Checking refrigerant piping: Setup...............................
6.5.4
To perform a leak test ..................................................
6.5.5
To perform vacuum drying ...........................................
To insulate the refrigerant piping................................................
Charging refrigerant ...................................................................
6.7.1
About charging refrigerant ...........................................
6.7.2
Precautions when charging refrigerant ........................
6.7.3
To determine the additional refrigerant amount ...........
6.7.4
To charge refrigerant ...................................................
6.7.5
Error codes when charging refrigerant.........................
6.7.6
To fix the fluorinated greenhouse gases label .............
Connecting the electrical wiring..................................................
6.8.1
About connecting the electrical wiring..........................
6.8.2
Precautions when connecting electrical wiring ............
6.8.3
Guidelines when knocking out knockout holes ............
6.8.4
Guidelines when connecting the electrical wiring ........
6.8.5
To connect the electrical wiring on the outdoor unit.....
Finishing the outdoor unit installation .........................................
6.9.1
To close the outdoor unit .............................................
28
Overview: Configuration .............................................................
Making field settings...................................................................
7.2.1
About making field settings ..........................................
7.2.2
To access the field setting components.......................
7.2.3
Field setting components .............................................
7.2.4
To access mode 1 or 2 ................................................
7.2.5
To use mode 1 .............................................................
7.2.6
To use mode 2 .............................................................
7.2.7
Mode 1 (and default situation): Monitoring settings .....
7.2.8
Mode 2: Field settings..................................................
7.2.9
To connect the PC configurator to the outdoor unit .....
8 Commissioning
8.1
8.2
8.3
8.4
15
15
16
16
16
17
18
18
18
19
20
20
20
20
20
21
21
21
21
21
22
22
23
23
24
24
25
26
26
26
28
28
28
28
28
28
28
29
29
29
30
30
31
31
Overview: Commissioning..........................................................
Precautions when commissioning ..............................................
Checklist before commissioning.................................................
Checklist during commissioning .................................................
8.4.1
About test run...............................................................
8.4.2
To perform a test run (7-LEDs display)........................
8.4.3
Correcting after abnormal completion of the test run...
8.4.4
Operating the unit ........................................................
31
31
31
32
32
32
32
32
9 Hand-over to the user
32
10 Maintenance and service
33
10.1
10.2
10.3
Overview: Maintenance and service ..........................................
Maintenance safety precautions.................................................
10.2.1 To prevent electrical hazards.......................................
Checklist for yearly maintenance of the outdoor unit .................
11 Troubleshooting
11.1
11.2
11.3
33
33
33
33
33
Overview: Troubleshooting.........................................................
Precautions when troubleshooting .............................................
Solving problems based on error codes.....................................
11.3.1 To display the error codes of the latest malfunctions...
11.3.2 Error codes: Overview .................................................
33
33
34
34
34
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
1 General safety precautions
12 Disposal
35
DANGER: RISK OF EXPLOSION
13 Technical data
36
Indicates a situation that could result in explosion.
13.1
13.2
13.3
Service space: Outdoor unit ...................................................... 36
Piping diagram: Outdoor unit..................................................... 38
Wiring diagram: Outdoor unit .................................................... 39
WARNING
Indicates a situation that could result in death or serious
injury.
For the user
40
WARNING: FLAMMABLE MATERIAL
14 About the system
40
CAUTION
14.1
System layout............................................................................ 40
15 Before operation
40
16 Operation
40
16.1
16.2
40
18 Maintenance and service
40
Maintenance after a long stop period ........................................
About the refrigerant..................................................................
After-sales service and warranty ...............................................
18.3.1 Warranty period ..........................................................
18.3.2 Recommended maintenance and inspection..............
19 Troubleshooting
19.1
NOTICE
Indicates a situation that could result in equipment or
property damage.
Operation range ........................................................................ 40
Operating the system ................................................................ 40
16.2.1 About operating the system ........................................ 40
17 Energy saving and optimum operation
18.1
18.2
18.3
Indicates a situation that could result in minor or moderate
injury.
40
41
41
41
41
INFORMATION
Indicates useful tips or additional information.
Symbol
Before performing maintenance and service tasks,
read the service manual.
For more information, see the installer and user
reference guide.
41
Symptoms that are NOT system malfunctions ..........................
19.1.1 Symptom: The system does not operate ....................
19.1.2 Symptom: The unit does not stop immediately when
operation is stopped....................................................
19.1.3 Symptom: Noise (Outdoor unit) ..................................
19.1.4 Symptom: Dust comes out of the unit .........................
19.1.5 Symptom: The outdoor unit fan does not spin ............
42
42
42
42
42
42
20 Relocation
42
21 Disposal
42
22 Glossary
42
Explanation
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
1.2
For the user
▪ If you are not sure how to operate the unit, contact your installer.
▪ This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved. Children shall
not play with the appliance. Cleaning and user maintenance shall
not be made by children without supervision.
WARNING
1
General safety precautions
1.1
About the documentation
To prevent electric shocks or fire:
▪ Do NOT rinse the unit.
▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide must be
performed by an authorised installer.
1.1.1
▪ Do NOT operate the unit with wet hands.
▪ Do NOT place any objects containing water on the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
▪ Units are marked with the following symbol:
Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
This means that electrical and electronic products may not be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
Installer and user reference guide
3
1 General safety precautions
▪ Batteries are marked with the following symbol:
This means that the batteries may not be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility
for reuse. By ensuring waste batteries are disposed of correctly,
you will help to prevent potential negative consequences for the
environment and human health.
1.3
For the installer
1.3.1
General
If you are not sure how to install or operate the unit, contact your
dealer.
CAUTION
For use of units in applications with schedule timer mode, it
is advised to foresee a delay of 10 to 15 minutes for
signalling the alarm in case the schedule timer is
exceeded. The unit may stop for several minutes during
normal operation for "defrosting of the unit" or when in
"thermostat-stop" operation.
In accordance with the applicable legislation, it might be necessary
to provide a logbook with the product containing at least: information
on maintenance, repair work, results of tests, stand-by periods,…
Also, at least, following information must be provided at an
accessible place at the product:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
NOTICE
1.3.2
Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.
▪ Provide sufficient space around the unit for servicing and air
circulation.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
Installation site
▪ Make sure the installation site withstands the unit's weight and
vibration.
▪ Make sure the area is well ventilated. Do NOT block any
ventilation openings.
▪ Make sure the unit is level.
Do NOT install the unit in the following places:
CAUTION
Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
DANGER: RISK OF BURNING
▪ Do NOT touch the refrigerant piping, water piping or
internal parts during and immediately after operation. It
could be too hot or too cold. Give it time to return to
normal temperature. If you must touch it, wear
protective gloves.
▪ Do NOT touch any accidental leaking refrigerant.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
CAUTION
Do NOT touch the air inlet or aluminium fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
1.3.3
Refrigerant
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.
NOTICE
Make sure the field piping and connections are not
subjected to stress.
WARNING
During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).
▪ Do NOT sit, climb or stand on the unit.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
Installer and user reference guide
4
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
1 General safety precautions
WARNING
▪ Open refrigerant cylinders slowly.
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
CAUTION
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
When the refrigerant charging procedure is done or when
pausing, close the valve of the refrigerant tank
immediately. If the valve is not closed immediately,
remaining pressure might charge additional refrigerant.
Possible consequence: Incorrect refrigerant amount.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leakage in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
1.3.4
Brine
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
The selection of the brine MUST be in accordance with the
applicable legislation.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
WARNING
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
WARNING
NOTICE
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
1.3.5
If applicable. See the installation manual or installer reference guide
of your application for more information.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
▪ Only use tools exclusively for the refrigerant type used in the
system, this to ensure pressure resistance and prevent foreign
materials from entering into the system.
▪ Charge the liquid refrigerant as follows:
If
A siphon tube is present
Water
Then
Charge with the cylinder upright.
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
NOTICE
Make sure water quality complies with EU directive
98/83 EC.
1.3.6
Electrical
DANGER: RISK OF ELECTROCUTION
▪ Turn OFF all power supply before removing the
switch box cover, connecting electrical wiring or
touching electrical parts.
▪ Disconnect the power supply for more than 1 minute,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
A siphon tube is NOT present
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Charge with the cylinder upside
down.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
Installer and user reference guide
5
2 About the documentation
WARNING
NOTICE
▪ ONLY use copper wires.
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
▪ Make sure the field wiring complies with the applicable
legislation.
If there exists the possibility of reversed phase after a
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
NOTICE
Precautions when laying power wiring:
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
2
About the documentation
2.1
About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪ General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the box of the outdoor unit)
▪ Outdoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪ Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
▪ Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information/
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
▪ Over-tightening the terminal screws may break them.
Technical engineering data
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
The original documentation is written in English. All other languages
are translations.
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
▪ Make sure all covers are closed before starting up the
unit.
Installer and user reference guide
6
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
3 About the box
For the installer
3
About the box
3.2.2
To handle the outdoor unit
Carry the unit slowly as shown:
3.1
Overview: About the box
This chapter describes what you have to do after the box with the
outdoor unit is delivered on-site.
It contains information about:
▪ Unpacking and handling the units
CAUTION
▪ Removing the accessories from the units
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
▪ Removing the transportation stay
Keep the following in mind:
▪ At delivery, the unit must be checked for damage. Any damage
must be reported immediately to the carrier's claims agent.
Forklift. As long as the unit remains on its pallet, you can also use a
forklift.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare the path along which you want to bring the unit inside in
advance.
▪ When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor
damage.
▪ Prepare the path along which you want to bring the unit inside in
advance.
3.2
Outdoor unit
3.2.1
To unpack the outdoor unit
1
2
3.2.3
To remove the accessories from the
outdoor unit
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 14.
2
Remove the accessories.
a
b
c
e
f
g
1×
1×
a
b
c
d
e
f
g
3.2.4
1×
1×
1×
d
1×
1×
General safety precautions
Outdoor unit installation and operation manual
Fluorinated greenhouse gases label
Multilingual fluorinated greenhouse gases label
Gas piping accessory 1 (Ø15.9 mm to 19.1 mm)
Gas piping accessory 2 (Ø19.1 mm)
Gas piping accessory 3 (Ø19.1 mm)
To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The compressor transportation stay must be removed. It is installed
under the compressor leg in order to protect the unit during
transport. Proceed as shown in the figure and procedure below.
1
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Slightly loosen the compressor mounting bolt (a).
Installer and user reference guide
7
4 About the units
2
Remove the transportation stay (b).
3
Tighten the compressor mounting bolt (a) to 10.1 N•m.
This unit is intended for outdoor installation and aimed for air to air
cooling applications.
Specification
Capacity (cooling)(a)
LRMEQ3
LRMEQ4
5.90 kW
8.40 kW
–20~43°C DB
Ambient design temperature
(cooling)
3
(a)
(10.1 N·m)
1
a
System layout
4.4
b
Capacity measured at the following conditions: ambient
temperature 32°C, evaporating temperature –10°C,
superheat 10 K.
2
4
About the units
4.1
Overview: About the units
a
b
c
This chapter contains information about:
a
b
c
d
▪ Identification of the outdoor unit.
▪ Where the outdoor unit fits in the system layout.
▪ Possible options for the outdoor unit.
▪ With which indoor units you can combine the outdoor units.
4.2
Identification
d
Outdoor unit (ZEAS condensing unit)
Refrigerant piping
Indoor unit (Blower coil)
Indoor unit (Showcase)
4.5
Combining units and options
4.5.1
Possible options for the outdoor unit
INFORMATION
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
Refer to the technical engineering data for the latest option
names.
Refrigerant branching kit
Description
4.2.1
Identification label: Outdoor unit
Location
Model name
Refnet header
KHRQ22M29H
Refnet joint
KHRQ22M20T
KHRQ22M29T9
Modbus communication box (BRR9A1V1)
Interface that provides a two-way communication possibility with
third-party monitoring systems (BMS), via Modbus. Allows remote
access to all operating parameters, while at the same time provides
the possibility to control the refrigeration units from a distance:
setting the target evaporating temperature, resetting error codes, …
PC configurator cable (EKPCCAB)
Model identification
Example: LR ME Q 4 B Y1 [*]
Code
Explanation
LR
ZEAS condensing unit
ME
Medium temperature refrigeration
Q
Refrigerant R410A
3+4
Capacity class
B
Model series
Y1
Power supply
[*]
Minor model change indication
4.3
About the outdoor unit
This installation manual concerns the ZEAS condensing unit.
Installer and user reference guide
8
You can make several commissioning field settings through a
personal computer interface. For this option EKPCCAB is required
which is a dedicated cable to communicate with the outdoor unit.
The
user
interface
software
is
available
on
http://
www.daikineurope.com/support-and-manuals/software-downloads/.
4.5.2
About the indoor units
NOTICE
To be sure your system setup (outdoor unit+indoor unit(s))
will work, you have to consult the latest technical
engineering data for ZEAS condensing unit.
The ZEAS condensing unit can be combined with several types of
third party indoor units and is intended for R410A use only.
When installing indoor units, mind the following:
▪ Expansion valve. Install an R410A expansion valve on each
indoor unit. Insulate the feeler block of the expansion valve.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
5 Preparation
INFORMATION
▪ Install either a mechanical thermostatic expansion
valve, or an electronic expansion valve (proportional or
pulse type).
▪ When installing a pulse-type electronic expansion
valve, make sure to protect the piping from pressure
waves caused by the opening and closing of the valve.
The installation of a pulse type expansion valve is the
responsibility of the installer.
5.2
Preparing the installation site
Do NOT install the unit in places often used as work place. In case
of construction works (e.g. grinding works) where a lot of dust is
created, the unit must be covered.
Choose the installation location with sufficient place for carrying the
unit in and out of the site.
5.2.1
For more information, see "5.3.7 To select the expansion valve" on
page 13.
Installation site requirements of the
outdoor unit
INFORMATION
▪ Solenoid valve. Install an R410A solenoid valve (with an
operating differential pressure of 3.5 MPa [35 bar] or more) on the
primary side of the expansion valve for each indoor unit.
Also read the following requirements:
▪ General installation site requirements.
"General safety precautions" chapter.
▪ Filter. Install a filter on the primary side of the solenoid valve for
each indoor unit. Determine the filter mesh count based on the
size specified by the solenoid valve and the expansion valve being
used.
See
the
▪ Service space requirements. See the "Technical data"
chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
▪ Refrigerant flow. Route the path to the indoor unit heat
exchanger so that the refrigerant flow is from top to bottom.
INFORMATION
▪ Defrosting type. Use either off-cycle defrosting or electric heater
defrosting models. Do NOT use hot-gas defrosting models.
The sound pressure level is less than 70 dBA.
CAUTION
About reusing existing indoor heat exchangers
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
In some cases you may reuse existing indoor heat exchangers, in
other cases not.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
Reuse NOT allowed
You may not reuse existing indoor heat exchangers in the following
cases:
NOTICE
▪ When the design pressure is insufficient. Minimum design
pressure = 2.5 MPa or 25 bar
This equipment is compliant with Class A of EN55032/
CISPR 32. In a residential environment this equipment
may cause radio interference.
▪ When the path to the heat exchanger has been routed so that the
flow of refrigerant is from bottom to top.
▪ When the copper piping or fan is corroded.
NOTICE
▪ When the heat exchanger is contaminated. Foreign materials
(including oils for fabrication) must be ≤30 mg/10 m.
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
Reuse allowed
In other cases than above, you may reuse existing indoor heat
exchangers. However, if the old condensing unit did NOT use the
same refrigerant (R410A) and the same oil (FVC68D) as the new
one, you must clean the heat exchanger tubes to remove any
residue.
If the old condensing unit did NOT use the same refrigerant (R410A)
as the new one, make sure the expansion valve is compatible with
R410A.
Preparation
5.1
Overview: Preparation
ab
c
d
ab
e
f
ab
g
0
≥1
50
≥150
0
5
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
This chapter describes what you have to do and know before going
on-site.
≥1500
≥1500
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
(mm)
a
b
c
d
e
f
g
Earth leakage protector
Fuse
Indoor unit (Showcase)
Personal computer or radio
Indoor unit (Blower coil)
User interface
Outdoor unit
Installer and user reference guide
9
5 Preparation
In places with weak reception, keep distances of 3 m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
▪ Select a place where rain can be avoided as much as possible.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
▪ deterioration of the operational capacity;
▪ disruption of operation due to decrease of low pressure or
increase of high pressure;
▪ a broken fan (if a strong wind blows continuously on the fan, it
may start rotating very fast, until it breaks).
It is recommended to install a baffle plate when the air outlet is
exposed to wind.
Turn the air outlet side towards the building's wall, fence or screen.
▪ Heat exchanger fins are sharp and injury is possible. Choose an
installation location where there is no risk for injury (especially in
areas where children play).
Do NOT install the unit in the following places:
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble.
Note: If the sound is measured under actual installation
conditions, the measured value might be higher than the sound
pressure level mentioned in Sound spectrum in the data book due
to environmental noise and sound reflections.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
a
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
a
▪ In vehicles or vessels
Make sure there is enough installation space
Set the air outlet side at a right angle to the direction of the wind.
▪ Where acidic or alkaline vapour is present
Seaside installation. Make sure the outdoor unit is NOT directly
exposed to sea winds. This is to prevent corrosion caused by high
levels of salt in the air, which might shorten the life of the unit.
a
Install the outdoor unit away from direct sea winds.
b
Example: Behind the building.
a
b
a
b
a
c
5.2.2
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
Prevailing wind direction
Air outlet
Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
d
c
a
b
a
c
d
c
d
b
c
a
b
c
d
Sea wind
Building
Outdoor unit
Windbreaker
Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet
causes short circuit (suction of discharge air). This may result in:
Installer and user reference guide
10
a
b
Snow cover or shed
Pedestal (minimum height = 150 mm)
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
5 Preparation
c
d
5.2.3
Prevailing wind direction
Air outlet
D
When there are no smaller room divisions:
E
When there is a room division that has an opening
sufficiently large to permit free air flow.
Securing safety against refrigerant leaks
About safety against refrigerant leaks
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The following
standards may be applicable if local regulations are not available.
This system uses R410A as refrigerant. R410A itself is an entirely
safe non-toxic, non-combustible refrigerant. Nevertheless care must
be taken to ensure that the system is installed in a room which is
sufficiently large. This assures that the maximum concentration level
of refrigerant gas is not exceeded, in the unlikely event of major leak
in the system and this in accordance to the local applicable
regulations and standards.
About the maximum concentration level
a b
The maximum charge of refrigerant and the calculation of the
maximum concentration of refrigerant is directly related to the
humanly occupied space in to which it could leak.
a Opening between the rooms. In case there is a door
the openings above and below the door each must be
equivalent in size to 0.15% or more of the floor area.
3
The unit of measurement of the concentration is kg/m (the weight in
kg of the refrigerant gas in 1 m3 volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
b Room division
3
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
R410A is limited to 0.44 kg/m3.
a b
a
b
Direction of the refrigerant flow
Room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
4
Pay special attention to places, such as basements etc., where
refrigerant can stay, since refrigerant is heavier than air.
To check the maximum concentration level
Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
1
Formula
F/G≤H
F
Total volume of refrigerant in the refrigerant
system
G
Size (m3) of smallest room in which there is
an indoor unit installed
H
Maximum concentration level (kg/m3)
Calculate the refrigerant density taking the volume of the room
where the indoor unit is installed and the adjacent room. Install
ventilation openings in the door of adjacent rooms until the
refrigerant density is smaller than the maximum concentration
level.
5.3
Preparing refrigerant piping
5.3.1
About reusing existing piping
Calculate the amount of refrigerant (kg) charged to each system
separately.
In some cases you may reuse existing piping, in other cases not.
Formula
A+B=C
Reuse not allowed
A
Amount of refrigerant in a single unit system
(amount of refrigerant with which the system
is charged before leaving the factory)
You may not reuse existing piping in the following cases:
B
Additional charging amount (amount of
refrigerant added locally)
C
Total amount of refrigerant (kg) in the
system
NOTICE
Where a single refrigerant facility is divided into 2 entirely
independent refrigerant systems, use the amount of
refrigerant with which each separate system is charged.
2
Calculate the refrigerant density using the results of the
calculations in steps 1 and 2 above. If the result of the above
calculation exceeds the maximum concentration level, a
ventilation opening to the adjacent room shall be made.
▪ When the compressor in the old installation had problems
(example: breakdown). Possible consequence: oxidised coolant
oil, scale residue and other adverse effects.
▪ When the indoor and outdoor units were disconnected from the
piping for a long time. Possible consequence: water and dirt in
the piping.
▪ When the copper piping is corroded.
Reuse allowed
In other cases than above, you may reuse existing piping but keep
the following in mind:
Calculate the volume of the room (m3) where the indoor unit is
installed. In a case such as the following, calculate the volume
of (D), (E) as a single room or as the smallest room.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
11
5 Preparation
Item
Description
Piping diameter
1
Must comply with requirements. See
"5.3.2 Refrigerant piping requirements" on
page 12.
Piping material
Piping length and
height difference
A
Piping insulation
Must be checked for gas leaks.
Cleaning piping
If the old condensing unit did NOT use the
same refrigerant (R410A) and the same oil
(FVC68D) as the new one, you must clean
the piping to remove any residue.
Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
a
d1
b
1
2
3
A~F
a~f
H
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
▪ Clean and dry: foreign materials (including mineral oils
or moisture) should be prevented from getting mixed
into the system.
▪ Tight: R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce earth's
protection against harmful ultraviolet radiation. R410A
can contribute slightly to the greenhouse effect if it is
released. Therefore pay special attention to check the
tightness of the installation.
c
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping material
▪ Select the pipe size nearest to the required size.
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.7.3 To determine the additional refrigerant
amount" on page 22.
A/a: Piping between outdoor unit and piping
branching
Liquid piping
Ø9.5 mm(a)
Gas piping
Ø19.1 mm(b)
(a)
(b)
Same diameter as the connection on the outdoor unit.
Use the accessory piping to adapt the diameter of the
outdoor unit stop valve (Ø15.9 mm) to that of the field
piping (Ø19.1 mm).
B+C/b+c: Piping between piping branching
Use diameters depending on the total capacity of the indoor units
connected downstream.
Liquid piping
▪ Piping material: Phosphoric acid deoxidised seamless copper.
Gas piping
▪ Piping temper grade and thickness:
6.4 mm (1/4")
Temper grade
Thickness (t)(a)
Annealed (O)
≥0.80 mm
Annealed (O)
≥0.99 mm
Half hard (1/2H)
≥0.80 mm
Ø
9.5 mm (3/8")
t
12.7 mm (1/2")
15.9 mm (5/8")
19.1 mm (3/4")
(a)
5.3.4
d2
Outdoor unit
Indoor unit (Showcase)
Indoor unit (Blower coil)
Liquid piping
Gas piping
Height difference outdoor-indoor
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
NOTICE
Outer diameter
(Ø)
3
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
NOTICE
5.3.3
3
e
f
Welded connections
5.3.2
2
2
Must comply with requirements. See
"6.6 To insulate the refrigerant piping" on
page 21.
D2
D1
E
F
H
If deteriorated, must be replaced.
C
B
Piping outer
diameter
<4.0 kW
Ø6.4 mm
4.0≤x<8.4 kW
Ø9.5 mm
<1.0 kW
Ø9.5 mm
1.0≤x<6.0 kW
Ø12.7 mm
6.0≤x<8.4 kW
Ø15.9 mm
D~F/d~f: Piping between piping branching and
indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units.
NOTICE
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
If only 1 indoor unit is connected to the outdoor unit, and
the connections on the outdoor unit are different from
those on the indoor unit, then use the same piping
diameter as the connections on the outdoor unit, and install
suitable adapters as near to the indoor unit as possible.
To select the piping size
Determine the proper size using the following tables and reference
figure (only for indication).
Capacity
5.3.5
To select refrigerant branch kits
For refrigerant piping branching, it is allowed to use T-joints, Y-joints,
refnet joints, and refnet headers. It is possible to use a refrigerant
branching option kit from the table below.
Installer and user reference guide
12
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
5 Preparation
Description
Model name
Refnet header(a)
KHRQ22M29H
Refnet joint(b)
KHRQ22M20T
KHRQ22M29T9
(a)
(b)
5.4
Preparing electrical wiring
5.4.1
Safety device requirements
Power supply
Do NOT connect 2 or more headers in series. For the gas
side choose the refnet header so that the diameter of the
header is equal to the main piping diameter or equal to one
size-up of the main piping diameter.
Choose the refnet joint so that the incoming and outgoing
piping diameters match with one of the available diameters
of the refnet joint. For more information, see
"5.3.3 Refrigerant piping material" on page 12 and
"5.3.4 To select the piping size" on page 12.
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
INFORMATION
Maximum 8 branches can be connected to a header.
5.3.6
Refrigerant piping length and height
difference
LRMEQ3
6.5 A
LRMEQ4
9.1 A
50 m
▪ Example: a+b+c+d2≤Limit
80 m
The operation switch is located in the switchbox (see illustration
below).
▪ Example: a+b+c+d1+d2+e+f≤Limit
Maximum length first branch kit-indoor
unit
380-415 V
Remote operation switch. The unit is factory-equipped
with an operation switch with which you can turn unit
operation ON/OFF. If you want to remotely turn outdoor
unit operation ON/OFF, a remote operation switch is
required. Use a voltage-free contact for microcurrent
(≤1 mA, 12 V DC). Connect to X2M/C+D, and set to
"Remote ".
Limit
Maximum total piping length
30 m
Outdoor lower than
indoor
EM
R
10 m
The operation switch can be set to the following three positions:
5 m
Maximum height difference indoor-indoor
5.3.7
N
20 m
OFF
O
O
TE
▪ Example: b+c+d2≤Limit
Maximum height
Outdoor higher than
difference outdoor- indoor
indoor
▪ Example: H≤Limit
3N~ 50 Hz
16 A
NOTICE
(see example in "5.3.4 To select the piping size" on page 12)
Maximum actual piping length
Power supply
Remote operation switch, low-noise switch and output signals
wiring
The piping lengths and height differences must comply with the
following requirements.
Requirement
Minimum circuit Recommended
fuses
ampacity
Operation switch setting Function
To select the expansion valve
This unit has a larger subcooling ratio for the liquid refrigerant
compared to units without a subcooling mechanism, as the liquid
refrigerant is being cooled by a double tube heat exchanger
(subcooling ratio = condensing temperature–liquid refrigerant
temperature at outdoor unit outlet).
When selecting an expansion valve for the load according to the
technical information of the expansion valve manufacturer, take into
account the subcooling ratio (K) for the liquid refrigerant in the table
below.
OFF
Unit operation turned OFF
ON
Unit operation turned ON
Remote
Unit controlled (ON/OFF) with remote
operation switch
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑18]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC). Connect to X2M/A+B.
Subcooling ratio (K)
Te –20°C
–15°C
–10°C
–5°C
0°C
5°C
Tc
20°C
10
9
8
7
6
5
25°C
11
10
9
8
7
6
30°C
12
11
10
9
8
7
35°C
13
12
11
10
9
8
40°C
14
13
12
11
10
9
45°C
15
14
13
12
11
10
50°C
16
15
14
13
12
11
55°C
16
15
14
13
12
11
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
13
6 Installation
6.2.2
NOTICE
Output signals. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240 V AC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
▪ C/C1: caution signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1: warning signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ R/P2: run signal – connection optional – when the
compressor is running.
▪ P1/P2: operation signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
2
Sheathed cable (2 wires)
Wiring
Vinyl cords
1 1×
0.75~1.25 mm²
Maximum wiring length
6
Installation
6.1
Overview: Installation
130 m
6.3
Mounting the outdoor unit
6.3.1
About mounting the outdoor unit
Typical workflow
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
▪ Mounting the outdoor unit.
▪ Mounting the indoor units.
▪ Connecting the refrigerant piping.
Mounting the outdoor unit typically consists of the following stages:
1
2
3
4
Providing the installation structure.
Installing the outdoor unit.
Preventing the unit from falling over.
Protecting the unit against snow and wind by installing a snow
cover and baffle plates. See "Preparing installation site" in
"5 Preparation" on page 9.
6.3.2
Precautions when mounting the outdoor
unit
▪ Checking the refrigerant piping.
INFORMATION
▪ Charging refrigerant.
Also read the precautions and requirements in the
following chapters:
▪ Connecting the electrical wiring.
▪ Finishing the outdoor installation.
▪ General safety precautions
▪ Finishing the indoor installation.
▪ Preparation
INFORMATION
For installation of the indoor unit (mounting the indoor unit,
connecting the refrigerant piping to the indoor unit,
connecting the electrical wiring to the indoor unit …), see
the installation manual of the indoor unit.
6.2
Opening the units
6.2.1
About opening the units
6.3.3
To provide the installation structure
Check the strength and level of the installation ground so that the
unit will not cause any operating vibration or noise.
Fix the unit securely by means of foundation bolts in accordance
with the foundation drawing.
Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
Installer and user reference guide
14
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
4× M12
6.4.1
About connecting the refrigerant piping
0
Connecting the refrigerant piping
62
35
0
>150
)
55
-3
45
(3
(mm)
a
6.4
Before connecting the refrigerant piping
a
Make sure not to cover the drain holes.
Make sure the outdoor and indoor units are mounted.
Typical workflow
INFORMATION
Connecting the refrigerant piping involves:
The recommended height of the upper protruding part of
the bolts is 20 mm.
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the dryer and sight glass
20
▪ Connecting refrigerant piping branching
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
▪ Insulating the refrigerant piping
NOTICE
▪ Keeping in mind the guidelines for:
Fix the outdoor unit to the foundation bolts using nuts with
resin washers (a). If the coating on the fastening area is
stripped off, the nuts rust easily.
▪ Brazing
▪ Using the stop valves
a
6.3.4
▪ Pipe bending
▪ Removing pinched pipes
To install the outdoor unit
6.4.2
Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
4× M12
DANGER: RISK OF BURNING
NOTICE
Take the following precautions on refrigerant piping into
account:
▪ Avoid anything but the designated refrigerant to get
mixed into the refrigerant cycle (e.g. air).
6.3.5
To prevent the outdoor unit from falling
over
In case the unit is installed in places where strong wind can tilt the
unit, take following measure:
1
Prepare 2 cables as indicated in the following illustration (field
supply).
2
Place the 2 cables over the outdoor unit.
3
Insert a rubber sheet between the cables and the outdoor unit
to prevent the cable from scratching the paint (field supply).
4
Attach the cable’s ends. Tighten those ends.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
▪ Only use R410A when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials
(e.g. mineral oils and moisture) from mixing into the
system.
▪ Protect the piping as described in the following table to
prevent dirt, liquid or dust from entering the piping.
▪ Use caution when passing copper tubes through walls.
Installer and user reference guide
15
6 Installation
Unit
Installation period
Outdoor unit
Indoor unit
Protection method
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
Regardless of the
period
a
b
c
d
INFORMATION
a
b
c
d
Do NOT open the refrigerant stop valve before checking
the refrigerant piping. When you need to charge additional
refrigerant it is recommended to open the refrigerant stop
valve after charging.
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
b
a
Pipe bending guidelines
6.4.3
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40 mm or larger).
6.4.4
e
To braze the pipe end
d
c
a
b
c
d
e
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
Service port
Stop valve cover
Hexagon hole
Shaft
Seal
≤Ø25.4
NOTICE
1
In addition to a gas and liquid stop valve, the outdoor unit
has two maintenance stop valves. When connecting the
refrigerant piping to the outdoor unit, do NOT operate the
maintenance stop valves. The factory setting for these
valves is "open". When operating the unit, always leave
these valves in the open position. Operating the unit with
the valves in the closed position may cause the
compressor to fail.
1
▪ When brazing, blow through with nitrogen to prevent creation of
large quantities of oxidised film on the inside of the piping. This
film adversely affects valves and compressors in the refrigerating
system and prevents proper operation.
▪ Set the nitrogen pressure to 20 kPa (0.2 bar) (just enough so it
can be felt on the skin) with a pressure-reducing valve.
a
b
c
f
a
b
c
d
e
f
d
e
f
Refrigerant piping
Part to be brazed
Taping
Manual valve
Pressure-reducing valve
Nitrogen
▪ Do NOT use anti-oxidants when brazing pipe joints.
Residue can clog pipes and break equipment.
▪ Do NOT use flux when brazing copper-to-copper refrigerant
piping. Use phosphor copper brazing filler alloy (BCuP), which
does not require flux.
Flux has an extremely harmful influence on refrigerant piping
systems. For instance, if chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
deteriorate the refrigerant oil.
6.4.5
a
a
a
Maintenance stop valve
To open the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3
When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
Using the stop valve and service port
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The figure below shows the name of each part required in
handling the stop valve.
▪ The stop valve is factory closed.
Installer and user reference guide
16
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Air-cooled refrigeration condensing unit
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6 Installation
NOTICE
Thread-locking fluid. Before reattaching the service port
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part). Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation, refrigerant leakage and compressor
malfunction.
2
3
1
a
4
b
c
a
b
c
To close the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3
When the stop valve cannot be turned any further, stop turning.
Cover (do NOT apply thread-locking fluid)
Sealing part (do NOT apply thread-locking fluid)
Screw thread with thread-locking fluid
Tightening torques
Tightening torque N•m (turn clockwise to close)
Stop valve
size (mm)
Shaft
Valve body Hexagonal
wrench
Result: The valve is now closed.
Closing direction:
Cap (valve
lid)
Service
port
11.5~13.9
Ø9.5
5.4~6.6
4 mm
13.5~16.5
Ø15.9
13.5~16.5
6 mm
22.5~27.5
To remove the pinched pipes
6.4.6
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
To handle the stop valve cover
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
▪ The stop valve cover is sealed where indicated by the arrow. Do
NOT damage it.
▪ After handling the stop valve, tighten the stop valve cover
securely, and check for refrigerant leaks. For the tightening
torque, refer to the table below.
Use the following procedure to remove the pinched piping:
1
Remove the valve cover and make sure that the stop valves are
fully closed.
a
b
NOTICE
c
Thread-locking fluid. Before reattaching the stop valve
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part). Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation, refrigerant leakage and compressor
malfunction.
ab
d
a
b
c
d
2
b c
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p<
p>
A
a
b
c
Cover (do NOT apply thread-locking fluid)
Sealing part (do NOT apply thread-locking fluid)
Screw thread with thread-locking fluid
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
a
B
f
g
d
N2
R410A
b
c
e
a
b
c
d
e
f
g
A
B
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Installer and user reference guide
17
6 Installation
3
Recover gas and oil from the pinched piping by using a
recovery unit.
Where/how
Install the dryer after the sight glass, as near to
the outdoor unit as possible. Install
horizontally.
CAUTION
Do not vent gases into the atmosphere.
4
When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports
5
Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter,
a pair of nippers).
a
b
a Sight glass
b Dryer
When brazing
Follow the brazing instructions in the dryer
manual.
Remove the dryer cap immediately before
brazing (to prevent absorption of airborne
moisture).
If dryer paint burnt during brazing, repair it. For
repair paint details, contact the manufacturer.
Flow direction
To connect the refrigerant piping to the
outdoor unit
6.4.9
WARNING
If the dryer specifies a flow direction, install
accordingly.
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel. Especially
for the bottom and side connection, be sure to protect
the piping with suitable insulation, to prevent it from
coming into contact with the casing.
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
6
Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.4.7
1
Do the following:
▪ Remove the service cover (a) with screw (b).
▪ Remove the piping intake plate (c) with screw (d).
Guidelines when installing a sight glass
Install a sight glass on the liquid piping:
a
Diameter
9.5 mm
Where/how
Install the sight glass before the dryer, as near
to the outdoor unit as possible. Install
horizontally.
b
d
2
a
c
Choose a piping route (a, b, or c).
b
a Sight glass
b Dryer
When brazing
6.4.8
Follow the brazing instructions in the sight
glass manual.
Guidelines when installing a dryer
a
3
b
c
If you have chosen the downwards piping route:
▪ Drill (a, 4×) and remove the knockout hole (b).
▪ Cut out the slits (c) with a metal saw.
NOTICE
Do NOT operate the unit without a dryer installed.
Possible consequence: Equipment malfunction.
Install a dryer on the liquid piping:
Dryer type
80 g (100% molecular sieve equivalent)
(DML083/DML083S: Danfoss made)
Installer and user reference guide
18
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Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
4× Ø6 mm
a
b
Possibility 3: Downwards
c
4
c
c
Do the following:
e
▪ Connect the liquid pipe (a) to the liquid stop valve.
▪ Connect the gas pipe (b) to the gas stop valve.
e1
f
c
d
e, e1
f
b
a
Gas piping accessory 1
Gas piping accessory 2
Gas piping accessory 3 (cut it to the required length)
Field supply
NOTICE
5
Reattach the service cover and the piping intake plate.
When brazing: First braze the liquid side piping, then the
gas side piping. Enter the electrode from the front of the
unit and the welding torch from the right side to braze with
the flames facing outside and avoid the compressor sound
insulation and other piping.
6
Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
A
A
e
d
c
a
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
a
b
a
c
b
f
g
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
a Electrode
b Burning-resistant plate
c Welding torch
d Flames
6.4.10
e Compressor sound insulation
Guidelines when connecting piping
branching
f Liquid side piping
Liquid piping branching
g Gas side piping
▪ Connect the gas piping accessories (c, d, e), and cut them to
the required length (e1). This is necessary because the size
of the gas stop valve is Ø15.9 while the piping between
outdoor unit and first refrigerant branch kit is Ø19.1.
Possibility 1: To the front
▪ Install liquid piping joints horizontally. This will prevent an uneven
flow of refrigerant.
▪ Install liquid piping headers downwards.
b
A
≤30°
Possibility 2: To the side
A
c
a
b
c
c
c
a
Joint for branching
Header
Downward piping
Gas piping branching
▪ Install branched piping above main piping. This will prevent
refrigerant oil from flowing back to non‑operating indoor units.
f e1 e
d
d e1 e f
ab
a
b
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Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Main piping
Joint for branching
Installer and user reference guide
19
6 Installation
▪ Make sure the "horizontal" gas piping (and refnet header) slopes
down to the outdoor unit.
NOTICE
Use a 2-stage vacuum pump with a non-return valve or a
solenoid valve that can evacuate to a gauge pressure of
–⁠100.7 kPa (−⁠1.007 bar)(5 Torr absolute).
NOTICE
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
NOTICE
a
b
a
b
c
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
c
Gas piping sloping down from indoor units to branching
T-joint for branching
Gas piping sloping down from branching to outdoor unit
a
6.5.3
Checking refrigerant piping: Setup
b
p<
p>
A
a
c
a
b
c
Joint
Branch pipe
Main pipe
d
b
c
6.5.1
Checking the refrigerant piping
About checking the refrigerant piping
Valve
Valve B
Open
Valve C
Open
Liquid line stop valve
Close
Gas line stop valve
Close
NOTICE
Indoor units should also be leak and vacuum tested. Keep
any possible (field supplied) field piping valves open as
well.
▪ Performing vacuum drying to remove all moisture, air or nitrogen
in the refrigerant piping.
Only field installed refrigerant piping needs to be checked.
Therefore, make sure that all the outdoor unit stop valves are firmly
closed before performing leak test or vacuum drying.
6.5.4
For more information on the state of the valves, refer to
"6.5.3 Checking refrigerant piping: Setup" on page 20.
6.5.2
Checking refrigerant piping: General
guidelines
Connect the vacuum pump through a manifold to the service port of
all stop valves to increase efficiency (refer to "6.5.3 Checking
refrigerant piping: Setup" on page 20).
Installer and user reference guide
20
To perform a leak test
The leak test must satisfy the specifications of EN378‑2.
To check for leaks: Vacuum leak test
1
Evacuate the system from the liquid and gas piping to
–⁠100.7 kPa (–⁠1.007 bar)(5 Torr absolute) for more than 2 hours.
2
Once reached, turn off the vacuum pump and check that the
pressure does not rise for at least 1 minute.
3
Should the pressure rise, the system may either contain
moisture (see vacuum drying below) or have leaks.
NOTICE
Make sure that all (field supplied) field piping valves are
OPEN (not outdoor unit stop valves!) before you start leak
test and vacuuming.
State of valve
Open
▪ Checking for any leakages in the refrigerant piping.
All piping inside the unit has been factory tested for leaks.
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Valve C
Valve A
Checking the refrigerant piping involves:
If there is a possibility of moisture being present in the refrigerant
piping (for example, water may have entered the piping), first carry
out the vacuum drying procedure below until all moisture has been
removed.
e
a
b
c
d
e
f
g
A
B
C
Liquid and gas piping
6.5
g
f
C
N2
▪ If the outdoor unit is located higher than the indoor units, include
oil traps in the piping at 5 m intervals from the outdoor unit. This
will ensure the smooth returning of oil in the piping slanting
upward.
▪ Insulate the refrigerant branching. Make sure the thickness of the
refrigerant branching insulation equals that of the refrigerant
piping insulation.
B
To check for leaks: Pressure leak test
1
Break the vacuum by pressurising with nitrogen gas to a
minimum gauge pressure of 0.2 MPa (2 bar).
▪ Never set the gauge pressure of the high pressure section
of the system higher than the maximum operation pressure
of 4.0 MPa (40 bar).
▪ Never set the gauge pressure of the low pressure section
of the system higher than the design pressure of the indoor
unit.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
2
Test for leaks by applying a bubble test solution to all piping
connections.
3
Discharge all nitrogen gas.
b
a
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
6.5.5
To perform vacuum drying
NOTICE
The connections to the indoor units and all indoor units
should also be leak and vacuum tested. Keep, if existing,
all (field supplied) field valves to the indoor units open as
well.
To remove all moisture from the system, proceed as follows:
1
Evacuate the system for at least 2 hours to a target vacuum of
–⁠100.7 kPa (–⁠1.007 bar)(5 Torr absolute).
2
Check that, with the vacuum pump turned off, the target
vacuum is maintained for at least 1 hour.
3
Should you fail to reach the target vacuum within 2 hours or
maintain the vacuum for 1 hour, the system may contain too
much moisture. In that case, break the vacuum by pressurising
with nitrogen gas to a gauge pressure of 0.05 MPa (0.5 bar)
and repeat steps 1 to 3 until all moisture has been removed.
4
Depending on whether you want to immediately charge
refrigerant through the service port of the liquid stop valve, or
first pre-charge a portion of refrigerant through the liquid line,
either open the outdoor unit stop valves, or keep them closed.
See "6.7.4 To charge refrigerant" on page 22 for more
information.
a
b
Insulation material
Caulking etc.
6.7
Charging refrigerant
6.7.1
About charging refrigerant
The outdoor unit is factory charged with refrigerant, but depending
on the field piping you have to charge additional refrigerant.
Before charging refrigerant
Make sure the outdoor unit's external refrigerant piping is checked
(leak test, vacuum drying).
Typical workflow
Charging additional refrigerant typically consists of the following
stages:
1
2
Determining how much you have to charge additionally.
Charging additional refrigerant (pre-charging and/or charging).
3
Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
6.7.2
Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does NOT increase. This might be
caused by e.g. the closed state of the expansion valve in
the outdoor unit circuit, but does NOT present any problem
for correct operation of the unit.
6.6
To insulate the refrigerant piping
WARNING
▪ Only use R410A as refrigerant. Other substances may
cause explosions and accidents.
▪ R410A contains fluorinated greenhouse gases. Its
global warming potential (GWP) value is 2087.5. Do
NOT vent these gases into the atmosphere.
▪ When charging refrigerant, always use protective
gloves and safety glasses.
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
NOTICE
▪ Make sure to insulate the connection piping and refrigerant piping
branching entirely.
If the power of some units is turned off, the charging
procedure cannot be finished properly.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Take the following into account when determining the insulation
thickness:
Liquid pipe minimum temperature
Gas pipe minimum temperature
5°C
–20°C
Condensation might form on the surface of the insulation.
▪ If there is a possibility that condensation on the stop valve might
drip down into the indoor unit through gaps in the insulation and
piping because the outdoor unit is located higher than the indoor
unit, this must be prevented by sealing up the connections. See
below figure.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
NOTICE
Before starting charging procedures, check if the 7‑LEDs
display is as normal (see "7.2.4 To access mode 1 or 2" on
page 29). If a malfunction code is present, see
"11.3 Solving problems based on error codes" on
page 34.
NOTICE
In case of maintenance and the system (outdoor unit+field
piping+indoor units) does not contain any refrigerant any
more (e.g., after refrigerant reclaim operation), the unit has
to be charged with its original amount of refrigerant (refer
to the nameplate on the unit) and the determined additional
refrigerant amount.
Installer and user reference guide
21
6 Installation
6.7.3
To determine the additional refrigerant
amount
INFORMATION
3
Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves B and C.
4
Do one of the following:
For final charge adjustment in a test laboratory, contact
your dealer.
If
Then
The determined additional
Disconnect the manifold from
refrigerant amount is reached the liquid line.
Formula:
R=[(X1×Ø9.5)×0.06+(X2×Ø6.4)×0.02]+A+B
R
X1...2
A+B
Continue with the "Checking
the sight glass" instructions.
Additional refrigerant to be charged [in kg and rounded off
to 1 decimal place]
Total length [m] of liquid piping size at Øa
Parameters A and B
Too much refrigerant is
charged
Recover refrigerant.
Disconnect the manifold from
the liquid line.
Parameter A:
If the total capacity(a) of showcases is...
Then A is...
<5.0 kW
1.1 kg
5.0≤x<8.4 kW
2.3 kg
(a)
Continue with the "Checking
the sight glass" instructions.
Continue with the "Charging
refrigerant (with the
compressor running)"
instructions.
The determined additional
refrigerant amount is not
reached yet
Capacity at evaporating temperature of –10°C
Parameter B:
Checking the sight glass
If the total capacity(a) of blower coils is...
Then B is...
<5.0 kW
0.6 kg
5.0≤x<8.4 kW
1.2 kg
5
Open all outdoor unit stop valves.
Capacity at temperature difference (= evaporating
temperature – room temperature) of 10°C
6
Take all the precautions mentioned in "7 Configuration" on
page 28 and "8 Commissioning" on page 31 into account.
7
Turn on the power of the outdoor unit, but leave the operation
switch turned off (see "6.8.5 To connect the electrical wiring on
the outdoor unit" on page 26).
8
Set the target evaporating temperature with settings [2‑0] and
[2‑1] (see "7.2.8 Mode 2: Field settings" on page 30).
9
Turn on the power of the indoor units.
(a)
Metric piping. When using metric piping, replace the weight factors
in the formula by the ones from the following table:
Inch piping
If the determined additional refrigerant amount is reached by the
"Pre-charging refrigerant" instructions, continue as follows:
Metric piping
Piping
Weight factor
Piping
Weight factor
Ø6.4 mm
0.02
Ø6 mm
0.018
Ø9.5 mm
0.06
Ø10 mm
0.066
10 Turn on the operation switch.
6.7.4
To charge refrigerant
To speed up the refrigerant charging process, it is recommended to
first pre-charge a portion of refrigerant through the liquid line before
proceeding with the charging via the refrigerant charging port. It can
be skipped, but charging will take longer then.
Pre-charging refrigerant
Pre-charging can be done without compressor operation, by
connecting the refrigerant bottle to the service port of the liquid stop
valve.
1
Connect as shown. Make sure that all outdoor unit stop valves,
as well as valve A are closed.
p<
p>
A
a
B
d
g
f
C
Result: The unit will start operation.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to "6.7.5 Error
codes when charging refrigerant" on page 23 and
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the operation switch. The unit will stop and
return to idle condition.
11 Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant as described in
the "Charging refrigerant (with the compressor running)"
instructions, but do NOT exceed 10% of the determined
additional refrigerant amount (see "6.7.3 To determine the
additional refrigerant amount" on page 22).
N2
b
b
c
a
b
c
d
e
f
g
A
B
C
2
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Valve C
Open valves B and C.
Installer and user reference guide
22
c
d
e
a
O
X
a
b
c
d
Sealing state (= sufficient refrigerant)
Insufficient refrigerant
Sight glass
Full of liquid
A little foam in the liquid
A lot of foam in the liquid
12 Turn off the operation switch.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
Charging refrigerant (with the compressor running)
b
c
d
The remaining additional refrigerant charge can be charged by
operating the outdoor unit.
13 Connect as shown. Make sure valve A is closed.
p<
A
a
a
p>
B
d
O
X
a
b
c
d
g
f
C
N2
b
c
e
a
b
c
d
e
f
g
A
B
C
Sealing state (= sufficient refrigerant)
Insufficient refrigerant
Sight glass
Full of liquid
A little foam in the liquid
A lot of foam in the liquid
23 Turn off the operation switch.
Pressure reducing valve
Nitrogen
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Liquid line stop valve
Gas line stop valve
Valve A
Valve B
Valve C
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
NOTICE
Thread-locking fluid. Before reattaching the service port
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part). Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation, refrigerant leakage and compressor
malfunction.
14 Open the gas line stop valve all the way and adjust the opening
of the liquid line stop valve.
15 Take all the precautions mentioned in "7 Configuration" on
page 28 and "8 Commissioning" on page 31 into account.
16 Turn on the power of the outdoor unit, but leave the operation
switch turned off (see "6.8.5 To connect the electrical wiring on
the outdoor unit" on page 26).
a
17 Set the target evaporating temperature with settings [2‑0] and
[2‑1] (see "7.2.8 Mode 2: Field settings" on page 30).
b
c
18 Turn on the power of the indoor units.
19 Turn on the operation switch.
a
b
c
Result: The unit will start operation.
Cover (do NOT apply thread-locking fluid)
Sealing part (do NOT apply thread-locking fluid)
Screw thread with thread-locking fluid
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to "6.7.5 Error
codes when charging refrigerant" on page 23 and
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the operation switch. The unit will stop and
return to idle condition.
20 Open valves B and C.
21 Charge refrigerant until the remaining determined additional
refrigerant amount is added (see "6.7.3 To determine the
additional refrigerant amount" on page 22), and then close
valves C and B.
6.7.5
INFORMATION
When a malfunction occurs, X3M outputs a caution (C/C1)
or warning (C/W1) signal, and the H2P LED on the main
PCB lights up.
If a malfunction occurs, close valve B and C immediately. Confirm
the malfunction code and take corresponding action, "11.3 Solving
problems based on error codes" on page 34.
6.7.6
1
INFORMATION
▪ When there is little refrigerant remaining in the cylinder,
the cylinder's internal pressure will drop, making it
impossible to charge the unit, even if the opening of the
liquid line stop valve is adjusted. If this is the case,
replace the cylinder with one that has more refrigerant
remaining.
▪ If the piping length is long, replenishing while the liquid
line stop valve is fully closed may lead to activation of
the protection system, causing the unit to stop
operation.
22 Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant, but do NOT
exceed 10% of the determined additional refrigerant amount
(see "6.7.3 To determine the additional refrigerant amount" on
page 22).
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Error codes when charging refrigerant
To fix the fluorinated greenhouse gases
label
Fill in the label as follows:
a
Contains fluorinated greenhouse gases
f
RXXX
1 =
kg
b
2 =
kg
c
1 + 2 =
kg
d
tCO2eq
e
GWP: XXX
2
1
GWP × kg
1000
a
b
c
d
e
f
=
If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of a.
Factory refrigerant charge: see unit name plate
Additional refrigerant amount charged
Total refrigerant charge
Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO2-equivalent
GWP = Global warming potential
Installer and user reference guide
23
6 Installation
NOTICE
6.8
Connecting the electrical wiring
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
6.8.1
About connecting the electrical wiring
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1
Making sure the power supply system complies with the
electrical specifications of the units.
2
Connecting the electrical wiring to the outdoor unit (power
supply, remote operation switch, low-noise switch, output
signals, and options).
3
Connecting the main power supply.
Field wiring: Overview
Field wiring consists of the following:
d
TeS1
b
A
Ry0
c
X3M
C C1 W1 R
T1
T1
NC
B
No
P1 P2
S2T
t°
Ry 0
Ry 0
Ry 0
K1M
h
e
f
b
S1T
t° Y1S
Ry 1
E1H K1M
H1P
B
g
X2M
A B C D
X1M
L1 L2 L3 N
F1 F2
Ry 0
Ry 1
Ry 0
E1H K1M
t°
Ry 0
H1P
K1M
a
i
b
b
S1T
t° Y1S
S2T
j
k
A
B
a
b
c
d
e
f
g
h
i
j
k
T1
RY0, RY1
H1P
K1M
E1H
S1T
S2T
Y1S
Outdoor unit
Indoor unit
To outdoor unit
Earth leakage circuit breaker
High voltage wiring intake
Control board (field supply)
Caution signal
Warning signal
Run signal
Operation signal
Earth
Remote operation switch
OFF: normal mode
ON: low-noise mode
Timer
Relay
Defrost indicator
Contactor defrost heater
Defrost heater
Inner temperature adjustment thermostat
Defrost completion thermostat
Solenoid valve
Installer and user reference guide
24
3D111889
3N~ 50 Hz
380-415 V
L1 L2 L3
a
b
c
X3M
L1 L2 L3 N
C C1 W1 R P1 P2
X2M
A B C D
F1 F2
X1M
g
a
b
c
d
e
f
g
h
i
j
h
i
j
d
e
f
Earth leakage circuit breaker
Fuse
Power supply (including earth) (sheathed cable)
Low-noise switch
Remote operation switch
Transmission
Caution signal
Warning signal
Run signal
Operation signal
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
NOTICE
The operation output P1/P2 of the outdoor unit must be
connected to all solenoid valves that are installed upstream
of the expansion valves at the indoor unit. This connection
is required because the outdoor unit must be able to
control the solenoid valves during startup (to prevent liquid
refrigerant from entering the compressor) and oil return
operation.
NOTICE
Remote operation switch. The unit is factory-equipped
with an operation switch with which you can turn unit
operation ON/OFF. If you want to remotely turn outdoor
unit operation ON/OFF, a remote operation switch is
required. Use a voltage-free contact for microcurrent
(≤1 mA, 12 V DC). Connect to X2M/C+D, and set to
"Remote ".
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑18]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC). Connect to X2M/A+B.
NOTICE
Output signals. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240 V AC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
▪ C/C1: caution signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1: warning signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
▪ R/P2: run signal – connection optional – when the
compressor is running.
Do NOT operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
▪ P1/P2: operation signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
NOTICE
NOTICE
▪ Field wiring may not touch internal piping in order to
avoid wire damage due to high temperature piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
6.8.2
WARNING
Precautions when connecting electrical
wiring
DANGER: RISK OF ELECTROCUTION
WARNING
All field wiring and components must be installed by a
licensed electrician and must comply with the applicable
legislation.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
If the power supply has a missing or wrong N-phase,
equipment will break down.
NOTICE
Do NOT install a phase advancing capacitor, because this
unit is equipped with an inverter. A phase advancing
capacitor will reduce performance and may cause
accidents.
NOTICE
NEVER remove a thermistor, sensor, etc., when
connecting power wiring and transmission wiring. (If
operated without thermistor, sensor, etc., the compressor
may break down.)
NOTICE
▪ The reversed phase protection detector of this product
only functions when the product starts up.
Consequently reversed phase detection is not
performed during normal operation of the product.
▪ The reversed phase protection detector is designed to
stop the product in the event of an abnormality when
the product is started up.
▪ Replace 2 of the 3 phases (L1, L2, and L3) during
reverse-phase protection abnormality.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
25
6 Installation
6.8.3
Guidelines when knocking out knockout
holes
NOTICE
Precautions when making knockout holes:
Tightening torques
Wiring
Screw size
Tightening
torque (N•m)
X1M: power supply wiring
M5
2.2~2.7
M3.5
0.8~0.97
M4
2.39~2.91
▪ Avoid damaging the casing.
(power supply + shielded
ground)
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
X2M: remote operation
switch, low-noise switch
and transmission output
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
X3M: output signals
6.8.5
To connect the electrical wiring on the
outdoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
a
b
a
b
c
6.8.4
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
c
Knockout hole
Burr
Sealant etc.
Guidelines when connecting the electrical
wiring
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 14.
2
Strip insulation (20 mm) from the wires.
a
b
Keep the following in mind:
▪ If stranded conductor wires are used, install a round crimp-style
terminal on the end of the wire. Place the round crimp-style
terminal on the wire up to the covered part and fasten the terminal
with the appropriate tool.
a
b
3
Strip wire end to this point
Excessive strip length may cause electrical shock or
leakage.
Connect the remote operation switch as follows:
A B C D
b
F1 F2
X2M
a
a
b
Stranded conductor wire
Round crimp-style terminal
▪ Use the following methods for installing wires:
Wire type
NOTICE
Installation method
Remote operation switch. The unit is factory-equipped
with an operation switch with which you can turn unit
operation ON/OFF. If you want to remotely turn outdoor
unit operation ON/OFF, a remote operation switch is
required. Use a voltage-free contact for microcurrent
(≤1 mA, 12 V DC). Connect to X2M/C+D, and set to
"Remote ".
cb
Single-core wire
A
AA´
A´
c
a
a
4
a Curled single-core wire
Connect the low-noise switch as follows:
A B C D
b Screw
F1 F2
X2M
c Flat washer
cb
Stranded conductor
wire with round
crimp-style terminal
a
B
bc
B
NOTICE
a
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑18]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC). Connect to X2M/A+B.
a Terminal
b Screw
c Flat washer
O Allowed
X Not allowed
Installer and user reference guide
26
5
If you want to connect the modbus communication box,
connect the transmission wiring as follows:
A B C D
F1 F2
X2M
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
6 Installation
6
3N~ 50 Hz
380-415 V
L1 L2 L3
Connect the wiring to the output signals terminal (X3M) as
follows:
C C1 W1 R
a
P1 P2
b
c
a
a
b
c
d
b
c
d
X1M
L1 L2 L3 N
Caution signal
Warning signal
Run signal
Operation signal
a
b
c
Earth leakage circuit breaker
Fuse
Power supply cable
▪ Respect the following guidelines:
NOTICE
Output signal
Guideline
Caution and Warning signal Connection recommended
when system malfunctions
are likely to occur.
Run signal
Connection optional.
Operation signal
Connection mandatory.
Keep cables away from the left maintenance stop valve
and piping. The valve and piping can get very hot and
damage the cables.
8
X1M
Connect the operation signal
to the solenoid valves that are
installed upstream of the
expansion valves of the
indoor unit. The outdoor unit
controls the solenoid valve
opening:
▪ During start-up, to prevent
liquid
refrigerant
from
entering the compressor.
Fix the cables with cable ties.
X3M
X2M
2×
a
b
1×
▪ During oil return operation.
c
See "Field wiring:
Overview" on page 24 for
more details.
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
2×
NOTICE
a
b
c
Never connect the power supply to terminal blocks X2M or
X3M. Otherwise the entire system may break down.
NOTICE
Output signals. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240 V AC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
▪ C/C1: caution signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1: warning signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ R/P2: run signal – connection optional – when the
compressor is running.
▪ P1/P2: operation signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
7
9
Power supply (including earth)
Output signals
Remote operation switch, low-noise switch, transmission
Route the wiring through the frame and connect it to it.
Routing through
the frame
1
b
a
2
b
a
a Power supply cable and output signal
cables
b Remote operation switch cable, lownoise switch cable, and transmission cable
Connect the power supply as follows:
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
27
7 Configuration
Connecting to the
frame
When cables are routed from the unit, a
protection sleeve for the conduits (PG
insertions) can be inserted at the knockout
hole.
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
When you do not use a wire conduit,
protect the wires with vinyl tubes to
prevent the edge of the knockout hole from
cutting the wires.
A B
DANGER: RISK OF ELECTROCUTION
7.2
Making field settings
7.2.1
About making field settings
INFORMATION
a
bc
d
e
A Inside of the outdoor unit
The LEDs and buttons are located in the outdoor module
(not in the hydro module).
a Wire
To configure the condensing unit, you must give input to the outdoor
unit's main PCB (A1P). This involves the following field setting
components:
b Bush
▪ Push buttons to give input to the PCB
c Nut
▪ A display to read feedback from the PCB
d Frame
Field settings are defined by their mode, setting and value. Example:
[2‑1]=2.
B Outside of the outdoor unit
e Hose
PC configurator
10 Reattach the service cover. See "6.9.1 To close the outdoor
unit" on page 28.
11 Connect an earth leakage circuit breaker and fuse to the power
supply line.
6.9
Finishing the outdoor unit
installation
6.9.1
To close the outdoor unit
It is alternatively possible to make several commissioning field
settings through a personal computer interface (for this, option
EKPCCAB is required). The installer can prepare the configuration
(off-site) on PC and afterwards upload the configuration to the
system.
See also: "7.2.9 To connect the PC configurator to the outdoor
unit" on page 31.
Mode 1 and 2
Mode
NOTICE
Mode 1
When closing the outdoor unit cover, make sure that the
tightening torque does NOT exceed 4.1 N•m.
(monitoring
settings)
Mode 2
(field settings)
Description
Mode 1 can be used to monitor the current
situation of the outdoor unit. Some field setting
contents can be monitored as well.
Mode 2 is used to change the field settings of
the system. Consulting the current field setting
value and changing the current field setting
value is possible.
In general, normal operation can be resumed
without special intervention after changing field
settings.
Some field settings are used for special
operation. In such a case, it is required to abort
the special operation before normal operation
can restart. It will be indicated in below
explanations.
1
2 1×
7.2.2
To access the field setting components
See "6.2.2 To open the outdoor unit" on page 14.
7
Configuration
7.1
Overview: Configuration
7.2.3
Field setting components
NOTICE
This chapter describes what you have to do and know to configure
the system after it is installed.
The DIP switch (DS1 on A1P) is not used. Do NOT change
the factory setting.
The components to make field settings are as follows:
It contains information about:
▪ Making field settings
Installer and user reference guide
28
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
7 Configuration
TEST/
HWL
IND
H1P
H2P
H3P
MASTER SLAVE L.N.O.P. DEMAND
H4P
H5P
H6P
H7P
BS1
BS2
BS3
BS4
BS5
MODE
SET
RETURN
TEST
RESET
MULTI
H8P
If the default situation is not displayed after 10~12 minutes, check
the malfunction code. Solve the malfunction code accordingly.
Switching between modes
Use BS1 to switch between the default situation, mode 1 and
mode 2.
X2M
a
S1
S1
S1
B
Push buttons
7‑LEDs display
LED for indication during initialisation
ON ( ) OFF ( ) Flashing ( )
B
BS1~BS5
H1P~H7P
H8P
B
X1M
X3M
MODE
[5
S1
A1P
B
A2P
s]
Push buttons
Use the push buttons to make the field settings. Operate the push
buttons with an insulated stick (such as a closed ball-point pen) to
avoid touching of live parts.
b
c
a
b
c
BS1
BS1 [5 s]
Default situation (H1P OFF)
Mode 1 (H1P flashing)
Mode 2 (H1P ON)
Press BS1.
Press BS1 for at least 5 s.
INFORMATION
BS1
BS2
BS3
BS4
BS5
If you get confused in the middle of the process, press BS1
to return to the default situation.
MODE: For changing the set mode
SET: For field setting
RETURN: For field setting
Not used
Not used
7.2.5
7‑LEDs display
The display gives feedback about the field settings, which are
defined as [Mode-Setting]=Value.
H1P
H2P~H7P
H8P
Shows the mode
Shows the settings and values, represented in binary code
NOT used for field settings, but used during initialisation
Example:
[H1P - 32 + 16 + 8 + 4 + 2 + 1]
Description
H1P H2P H3P H4P H5P H6P H7P
Default situation
(H1P OFF)
In mode 1 (and in default situation) you can read out some
information.
See "7.2.7 Mode 1 (and default situation): Monitoring settings" on
page 30.
Example: 7‑LEDs display – Mode 1
See "11.3.1 To display the error codes of the latest malfunctions" on
page 34.
7.2.6
(H1P flashing)
Mode 2
(H1P ON)
Example: 7‑LEDs display – Mode 2
You can fine‑tune the value of setting [2‑1] (= Te target evaporating
temperature) to 8 (= +3°C) as follows:
#
Setting 1
0 + 0 + 0 + 0 + 0 + 1
Value 8
0 + 0 + 8 + 0 + 0 + 0
Action
1
Start from the default
situation.
2
Select mode 2.
3
Select setting 1.
(in mode 2)
(H2P~H7P = binary 1)
Button/display
BS1 [5 s]
(in mode 2)
(H2P~H7P = binary 8)
("X×" depends on the setting
that you want to select.)
To access mode 1 or 2
After the units are turned ON, the display goes to its default
situation. From there, you can access mode 1 and mode 2.
4
Select value 8 (= +3°C).
a: Display the current value.
Initialisation: default situation
b: Change until the LED
indication corresponds with
the LEDs in "7.2.8 Mode 2:
Field settings" on page 30.
("X×" depends on the current
value, and the value that you
want to select.)
Turn on the power supply of the outdoor unit. After initialisation, the
display indication state will be as below (default situation when
shipped from factory).
a
a BS3 [1×]
b BS2 [X×]
c BS3 [1×]
d BS3 [1×]
d: Confirm. The system starts
operating according to the
setting.
b
c
(= binary 1)
c: Enter the value in the
system.
10~12 min
a
b
c
To use mode 2
In mode 2 you can make field settings to configure the system.
Mode 1
7.2.4
To use mode 1
5
Quit mode 2.
BS1 [1×]
Power ON
Default situation
LED indication when there is a malfunction
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
29
7 Configuration
7.2.7
Mode 1 (and default situation): Monitoring
settings
In mode 1 (and in default situation) you can read out some
information.
7‑LEDs display – Mode 1 (H1P flashing)
You can read out the following information:
Setting
Value / Description
(
)
7‑LEDs display – Default situation (H1P OFF)
[1‑14]
You can read out the error code status:
Shows the latest malfunction
code.
Situation
[1‑15]
LED indication
Default
For more information, see
"11.3 Solving problems based on
error codes" on page 34.
Shows the 2nd last malfunction
code.
Error
[1‑16]
Shows the 3rd last malfunction
code.
7.2.8
Mode 2: Field settings
In mode 2 you can make field settings to configure the system. The LEDs give a binary representation of the setting/value number.
Setting
Value
Description
(= binary)
[2‑0]
Te target evaporating temperature.
–10°C
(default)
–20°C
With this setting the target evaporating temperature can be set in
increments of 5 K.
–15°C
–5°C
0°C
5°C
[2‑1]
Te fine‑tuning of evaporating temperature.
+0°C
(default)
+1°C
With this setting the target evaporating temperature set by [2‑0]
can be fine‑tuned in increments of 1 K.
+2°C
+3°C
+4°C
[2‑6]
Address not set
Address of the outdoor unit for communication with the Modbus
communication box (BRR9A1V1).
Address 1
For more information, see the installation manual of the Modbus
communication box.
Address 3
Address 2
Address 4
Address 5
…
…
Address 63
[2‑13]
Correction of evaporating temperature during low‑noise operation.
+1°C
(default)
+2°C
With this setting the target evaporating temperature set with
settings [2‑0] and [2‑1] can be corrected for low‑noise operation
(see setting [2‑18])
+3°C
+4°C
+5°C
+10°C
+15°C
+20°C
+0°C
+25°C
[2‑17]
Adjustment of fan and compressor speed during low‑noise
operation.
With this setting the maximum fan and compressor speed can be
set for low noise operation (see setting [2‑18]).
Low noise step 1
(default)
Low noise step 2
Low noise step 3
Low noise step 4
Low noise step 5
Installer and user reference guide
30
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
8 Commissioning
Value
Setting
Description
(= binary)
Correction of evaporating temperature (only
setting [2-13] applies)
[2‑18]
(default)
Low noise operation
Adjustment of fan and compressor speed (only
setting [2-17] applies)
With this setting one of three low‑noise operation modes can be
selected. Low‑noise mode can be activated by turning ON the
contact between terminals X2M/A and X2M/B. Refer to settings
[2‑13] and [2‑17] to set parameters for the low‑noise levels.
Correction of evaporating temperature and
adjustment of fan and compressor speed (both
settings [2-13] and [2-17] apply)
INFORMATION
CAUTION
For LRMEQ3 outdoor units, low noise steps 2, 3, and 4
have the same sound reducing effect.
Do not perform the test operation while working on the
indoor units.
7.2.9
When performing the test operation, not only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
To connect the PC configurator to the
outdoor unit
CAUTION
H JST
a
2
3
Do not insert fingers, rods or other objects into the air inlet
or outlet. Do not remove the fan guard. When the fan is
rotating at high speed, it will cause injury.
b
INFORMATION
4
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
5
X41A
A1P
a
b
X41A
A1P
PC
Cable (EKPCCAB)
Connector
Outdoor unit main PCB
During test operation, the outdoor unit and the indoor units will start
up. Make sure that the preparations of all indoor units are finished
(field piping, electrical wiring, air purge, ...). See installation manual
of the indoor units for details.
8.3
8
Commissioning
8.1
Overview: Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
This chapter describes what you have to do and know to
commission the system after it is configured.
Commissioning typically consists of the following stages:
Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
1
2
3
Checking the "Checklist before commissioning".
Performing a test run.
If necessary, correcting errors after abnormal completion of the
test run.
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"6.8 Connecting the electrical wiring" on page 24,
according to the wiring diagrams and according to the
applicable legislation.
4
Operating the system.
Power supply voltage
8.2
Precautions when commissioning
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
DANGER: RISK OF ELECTROCUTION
Earth wiring
DANGER: RISK OF BURNING
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
Never use the megatester for the transmission wiring.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
31
9 Hand-over to the user
Fuses, circuit breakers, or protection devices
4
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified in the chapter "5.4.1 Safety device
requirements" on page 13. Be sure that neither a fuse nor
a protection device has been bypassed.
Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant, but do NOT
exceed 10% of the determined additional refrigerant amount
(see "6.7.3 To determine the additional refrigerant amount" on
page 22).
b
c
d
Internal wiring
Visually check the electrical component box and the
inside of the unit on loose connections or damaged
electrical components.
a
Pipe size and pipe insulation
O
X
a
b
c
d
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
Stop valves
Be sure that the stop valves are open on both liquid and
gas side.
Damaged equipment
5
Check if the indoor unit blows cold air, and the room/showcase
temperature decreases.
6
Turn OFF the (remote) operation switch of the outdoor unit.
Check the inside of the unit on damaged components or
squeezed pipes.
CAUTION
Refrigerant leak
Do NOT turn OFF power by disconnecting the power
supply directly. Possible consequence:
Check the inside of the unit on refrigerant leakage. If there
is a refrigerant leak, try to repair the leak. If the repair is
unsuccessful, call your local dealer. Do not touch any
refrigerant which has leaked out from refrigerant piping
connections. This may result in frostbite.
Oil leak
Check the compressor for oil leakage. If there is an oil
leak, try to repair the leak. If the repairing is unsuccessful,
call your local dealer.
▪ The auto restart function of the unit might automatically
resume operation after the power supply is
reconnected.
▪ Compressor malfunction.
7
Check the test operation results on the outdoor unit 7‑LEDs
display.
Check that the air inlet and outlet of the unit is not
obstructed by paper sheets, cardboard, or any other
material.
Abnormal
completion
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Be sure to keep record of the installation date on the rear
of the front panel according to EN60335‑2‑40 and keep
record of the contents of the field setting(s).
8.4
Checklist during commissioning
To perform a test run.
Description
Completion
Normal
completion
Air inlet/outlet
Installation date and field setting
Sealing state (= sufficient refrigerant)
Insufficient refrigerant
Sight glass
Full of liquid
A little foam in the liquid
A lot of foam in the liquid
8.4.3
Refer to "8.4.3 Correcting after abnormal
completion of the test run" on page 32 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation is possible.
Correcting after abnormal completion of
the test run
The test operation is only completed if no malfunction occurs. In
case of a malfunction, perform correcting actions as explained in the
error code table (see "11.3.2 Error codes: Overview" on page 34).
Carry out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
8.4.1
When a malfunction occurs, X3M outputs a caution (C/C1)
or warning (C/W1) signal, and the H2P LED on the main
PCB lights up.
About test run
Make sure to carry out the system test operation after the first
installation.
The procedure below describes the test operation of the complete
system.
8.4.2
8.4.4
Operating the unit
Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
To perform a test run (7-LEDs display)
1
Make sure all field settings you want are set; see "7.2 Making
field settings" on page 28.
9
2
Turn ON the power to the outdoor unit and the connected
indoor units.
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
3
Turn ON the (remote) operation switch of the outdoor unit.
Installer and user reference guide
32
Hand-over to the user
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
10 Maintenance and service
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation on the url as earlier described in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
C+
▪ Show the user what to do in relation to maintaining the unit.
C–
A1P
A2P
Maintenance and service
10
3
To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
4
Pull out junction connectors for the fan motors in the outdoor
unit before starting service operation on the inverter equipment.
Be careful not to touch the live parts. (If a fan rotates due to
strong wind, it may store electricity in the capacitor or in the
main circuit and cause electric shock.)
NOTICE
Maintenance must be done by an authorised installer or
service agent.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO2-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
10.1
Overview: Maintenance and
service
This chapter contains information about:
Junction connectors
X107A for M2F
5
After the service is finished, plug the junction connector back in.
Otherwise the malfunction code E7 will be displayed and
normal operation will not be performed.
For details refer to the wiring diagram labelled on the back of the
service cover.
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Make sure to turn off the main switch and to remove
the fuses from the control circuit located in the outdoor unit.
10.3
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ The refrigerant recovery operation
X106A for M1F
Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
▪ Outdoor unit heat exchanger.
10.2
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
11
Troubleshooting
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
11.1
Overview: Troubleshooting
Before troubleshooting
10.2.1
To prevent electrical hazards
When performing service to inverter equipment:
1
Do not open the electrical component box cover for 10 minutes
after the power supply is turned off.
2
Measure the voltage between terminals on the terminal block
for power supply with a tester and confirm that the power supply
is shut off. In addition, measure points as shown in the figure,
with a tester and confirm that the voltage of the capacitor in the
main circuit is less than 50 V DC.
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
11.2
Precautions when troubleshooting
WARNING
▪ When carrying out an inspection on the switch box of
the unit, always make sure that the unit is disconnected
from the mains. Turn off the respective circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
33
11 Troubleshooting
WARNING
#
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: this appliance must NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
3
Action
Select a malfunction.
("X×" depends on the
setting that you want
to select.)
Display
BS2 Possible malfunctions:
[X×]
[1‑14] Latest malfunction:
[1‑15] 2nd last malfunction:
DANGER: RISK OF BURNING
11.3
[1‑16] 3rd last malfunction:
4
Solving problems based on error
codes
Display the first
character of the error
code.
BS3 Possible characters:
[1×]
E:
H:
INFORMATION
F:
When a malfunction occurs, X3M outputs a caution (C/C1)
or warning (C/W1) signal, and the H2P LED on the main
PCB lights up.
J:
L:
P:
You can display the error codes of the 3 latest malfunctions by using
the push buttons and 7‑LEDs display (see "7.2.3 Field setting
components" on page 28). Error codes consist of 2 characters
(example: E3).
U:
5
After solving the problem, reset the malfunction by turning OFF and
ON the operation switch, and retry operation.
Display the second
character of the error
code.
BS2 Possible characters:
[1×]
1:
2:
3:
11.3.1
#
To display the error codes of the latest
malfunctions
Action
1
Start from the default
situation.
2
Select mode 1.
4:
5:
Display
6:
7:
8:
BS1
[1×]
9:
A:
C:
6
11.3.2
Code
BS1
[1×]
Error codes: Overview
Description
Abnormally high pressure level
Criteria
Times of
retry
Output signal
High pressure switch ≥4.0 MPa (40 bar)
0
Warning
High pressure sensor ≥3.55 MPa (35.5 bar)
3
Warning
Inverter compressor motor lock
Position signal error
4
Outdoor unit fan motor
malfunction
Irregular revolution of 1 fan motor
Irregular revolution of 2 fan motors
Electronic expansion valve
abnormality
Abnormal discharge pipe
temperature
Wet operation from injection pipe
Installer and user reference guide
Solution
The stop valves are closed
Excessive refrigerant charge
▪
▪
Open the gas and liquid stop valves
Recalculate the additional refrigerant
charge and recover any excessive
refrigerant with a refrigerant recovery
machine
Warning
▪
▪
The stop valves are closed
Incorrect wiring
▪
▪
Open the gas and liquid stop valves
Ensure correct
▪ Phase order
▪ Wiring
4
Caution
Warning
Fan motor malfunction:
▪ M1F - A2P (X106A)
▪ M2F - A2P (X107A)
Check actuator, or connection on PCB
4
No continuity of electronic expansion valve
coil
0
Warning
Electronic expansion valve malfunction:
Y1E - A1P (X21A)
Check actuator, or connection on PCB
Discharge pipe temperature >150°C
0
Warning
▪
Discharge pipe temperature >120°C
continuously for 70 seconds or more
Discharge pipe temperature >125°C
continuously for 30 seconds or more
Discharge pipe temperature >130°C
14
Warning
▪
▪
Refrigerant shortage
Defective discharge thermistor or
outdoor unit PCB
Clogging of expansion valve for
injection
▪
▪
▪
Charge additional refrigerant
Replace defective component
Repair clogging
Discharge pipe temperature >110°C AND
Y1E ≥450 pls, continuously for 60 seconds
1
Caution
3
Warning
Suction superheat <5 K AND discharge
0
superheat <15 K AND discharge temperature
<60°C, continuously for 10 minutes
Caution
Excessive frost formation on indoor
side
Wrong selection of expansion valves
▪
▪
Adjust defrost cycle
Select the correct type of expansion
valve
In addition to above conditions (for caution):
discharge superheat <15 K for 6 hours
0
Warning
Suction superheat ≥5 K AND discharge
0
superheat <15 K AND discharge temperature
<60°C, continuously for 90 minutes
Caution
▪
In addition to above conditions (for caution):
discharge superheat <15 K for 6 hours
Warning
▪
▪
Wet operation from refrigeration
suction pipe
Cause
▪
▪
▪
34
Quit mode 1.
▪
0
▪
▪
Defective expansion valve, suction pipe ▪
thermistor, or subcool heat exchanger ▪
outlet thermistor
Refrigerant overcharge
Replace defective component
Adjust refrigerant charge
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
12 Disposal
Code
Description
Criteria
Times of
retry
Output signal
Cause
3‑sensor error
When 3 or more sensors detect abnormality
0
Warning
▪
▪
Faulty connection of sensor
Defective sensor or outdoor unit PCB
▪
▪
Connect the sensor properly
Replace defective component
High pressure switch failure
No continuity of high pressure switch
0
Warning
▪
▪
Faulty connection of switch
Defective swith or outdoor unit PCB
▪
▪
Connect the switch properly
Replace defective component
Outdoor fan motor signal failure
Abnormal position of signal of 1 fan motor
4
Caution
▪
Abnormal position of signal of 2 fan motors
4
Warning
▪
▪
▪
Ensure correct connection
Replace the fan motor
Replace the inverter PCB
▪
Abnormal fan motor signal (circuit
error)
Broken, short, or disconnected
connector of fan motor connection
cable
Defective inverter PCB
Outdoor air thermistor failure
Open circuit or shortcircuit
0
Caution
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Discharge thermistor failure
Open circuit or shortcircuit
0
Warning
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Suction thermistor failure
Open circuit or shortcircuit
0
Caution
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Heat exchanger inlet thermistor
failure
Open circuit or shortcircuit
0
Warning
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Heat exchanger outlet thermistor
failure
Open circuit or shortcircuit
0
Warning
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
High pressure sensor failure
Open circuit or shortcircuit
0
Caution
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Low pressure sensor failure
Open circuit or shortcircuit
0
Warning
▪
▪
Faulty connection of sensor
Defective sensor
▪
▪
Connect the sensor properly
Replace defective component
Inverter PCB malfunction
IGBT error
0
Warning
▪
Defective inverter PCB
▪
Check for external causes (e.g. EMI
noise), or replace the inverter PCB.
Radiation fin temperature rise
93°C
9
Warning
▪
Fin temperature rise because of
inverter malfunction
Fin temperature rise because of short
circuit
Fin thermistor malfunction
▪
Remove any obstacles that block the
passage of air to the outdoor unit
Check connection on PCB
Replace defective component
▪
▪
▪
12
Solution
▪
▪
Inverter compressor
instantaneous overcurrent
—
9
Warning
—
—
Inverter compressor overcurrent
≥16.1 A
9
Warning
—
—
Defective inverter compressor
startup failure
—
4
Warning
—
—
Transmission error between
control PCB and inverter PCB
Transmission failure between main PCB and
inverter PCB
No limit
Caution
Defective connection between main and
inverter PCB
Replace defective component
Inverter compressor power
voltage imbalance
—
9
Warning
Unbalanced power supply voltage
Check if power supply is within range
Radiation fin thermistor
Radiation fin thermistor open circuit or short
circuit
No limit
Caution
Defective radiation fin thermistor, inverter
PCB, inverter compressor, or fan motor
Replace defective component
Reversed phase / Open phase
Reversed phase or open phase
0
Warning
Faulty connection of phase order to power Make sure the phase order to X1M is ok
supply terminal X1M
Inverter compressor abnormal
power voltage
—
9
Warning
Insufficient power supply voltage
Make sure there is sufficient power supply
voltage
Disposal
NOTICE
Do not try to dismantle the system yourself: the dismantling
of the system, treatment of the refrigerant, oil and other
parts must comply with applicable legislation. Units must
be treated at a specialised treatment facility for reuse,
recycling and recovery.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
35
13 Technical data
13
Technical data
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is
available on the Daikin extranet (authentication required).
13.1
Service space: Outdoor unit
When mounting units side by side, the piping route must be to the front, to the back or downwards. In this case the piping route to the side is
not possible.
When mounting the units side by side and routing the piping to the back, you must keep a distance of ≥250 mm between the units (instead of
≥100 mm as shown on the figures below).
) | Single row of units (
Single unit (
)
A~E
eB
E
eD
e
HU
C
c
b
d
D
B
a
HD
HB
e
≥100
b
—
≥100 ≥100 ≥100
B, E
—
≥100
A, B, C, E
—
≥150 ≥150 ≥150
D
—
D, E
—
B, D
—
B, D, E
HB<HD
A,B,C,D
E
a,b,c,d,e
eB
eD
HU
HB,HD
1
2
e
eB
eD
≥1000
≤500
≥1000
≤500
≥500
≥1000 ≥1000 ≤500
≥100
≥500
HB≤½HU
≥250
≥750 ≥1000 ≤500
½HU<HB≤HU
≥250
≥1000 ≥1000 ≤500
HD≤½HU
≥100
≥1000 ≥1000
≤500
½HU<HD≤HU
≥200
≥1000 ≥1000
≤500
HD>HU
≥200
≥1700 ≥1000
≤500
≥1000
≤500
B
—
≥200 ≥300 ≥1000
A, B, C, E
—
≥200 ≥300 ≥1000
D
—
D, E
—
B, D
HD>HU
≥300
≥1000
HD≤½HU
≥250
≥1500
½HU<HD≤HU
≥300
≥1500
HB<HD
HB≤½HU
≥300
≥1000 ≥1000 ≤500
½HU<HB≤HU
≥300
≥1250 ≥1000 ≤500
HD≤½HU
≥250
≥1500 ≥1000
≤500
½HU<HD≤HU
≥300
≥1500 ≥1000
≤500
HD>HU
≥300
≥2200 ≥1000
≤500
HB
a
≥1000
≥1000 ≥1000 ≤500
HB>HU
A
HB>HD
1
1+2
Obstacles (walls/baffle plates)
Obstacle (roof)
Minimum service space between the unit and obstacles A, B, C, D and E
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle B
Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle D
Height of the unit
Height of obstacles B and D
Seal the bottom of the installation frame to prevent discharged air from flowing back to the suction side through the bottom of the unit.
Maximum two units can be installed.
Not allowed
Installer and user reference guide
36
d
A, B, C
d
HD
c
A, B, C
B, D, E
D
b
≥100
A
E
HU
c
a
—
HB>HU
≥100
C
(mm)
B
HB>HD
eB
eD
HB HD HU
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
13 Technical data
Multiple rows of units (
)
≥100
≥100
≥100
≥100
≥100
Stacked units (max. 2 levels) (
A1
≥100
b (mm)
b≥250
½HU<HB≤HU
b≥300
HB>HU
HB
b
≥2000
≥200
≥1000
HB HU
HB≤½HU
≥100
≥3000
HU
≥600
≥1500
)
A2
≥100
≥100
A2
A2
≥300
≥1000
B1
B2
≥100
≥100
B2
B2
≥100
≥100
≥300
≥1000
A1=>A2
B1=>B2
(A1) If there is danger of drainage dripping and freezing between the upper and lower units…
(A2) Then install a roof between the upper and lower units. Install the upper unit high enough above the lower unit to prevent ice buildup at the
upper unit's bottom plate.
(B1) If there is no danger of drainage dripping and freezing between the upper and lower units…
(B2) Then it is not required to install a roof, but seal the gap between the upper and lower units to prevent discharged air from flowing back to the
suction side through the bottom of the unit.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
37
13 Technical data
13.2
Piping diagram: Outdoor unit
m
k
R4T
g
c
R6T
Y1E
j
h
R1T
d
M
f
R3T
e
l
f
R5T
S1NPH
c
n
c
i
b
d
a
S1PH
S1NPL
M1C
a
b
c
d
e
f
g
h
i
j
k
l
m
n
M1C
R1T
R2T
R3T
R4T
R5T
R6T
S1NPH
S1NPL
S1PH
Y1E
Stop valve (gas)
Stop valve (liquid)
Filter
Service port
Check valve
Maintenance stop valve
Liquid receiver
Heat exchanger
Oil separator
Distributor
Double tube heat exchanger
Propeller fan
Sight glass
Capillary tube
Compressor
Thermistor (air)
Thermistor (discharge)
Thermistor (suction)
Thermistor (Liquid pipe)
Thermistor (Subcool heat exchanger outlet)
Thermistor (Subcool heat exchanger inlet)
High pressure sensor
Low pressure sensor
High pressure switch
Electronic expansion valve (Subcooling)
Installer and user reference guide
38
R2T
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
13 Technical data
13.3
Wiring diagram: Outdoor unit
The wiring diagram is delivered with the unit, located at the inside of
the service cover.
L*A
Connector
M1C
Motor (compressor)
Symbols:
M1F
Motor (fan) (upper)
M2F
Motor (fan) (lower)
Symbols
NA (A1P)
Connector
Main terminal
P1, P2
(A2P)
Connector
Earth wiring
Wire number 15
PS (A2P)
Power supply
Q1DI
Earth leakage circuit breaker (field supply)
R1T
Thermistor (air)
Connection ** continues on page
12 column 2
R2T
Thermistor (M1C discharge)
R3T
Thermistor (suction)
Several wiring possibilities
R4T
Thermistor (liquid pipe)
Option
R5T
Thermistor (subcool heat exchanger outlet)
Not mounted in switch box
R6T
Thermistor (subcool heat exchanger inlet)
Wiring depending on model
R10T
Thermistor (fin)
R* (A2P)
Resistor
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
Translation
English
Symbols
X1M
15
Field wire
Field cable
**/12.2
1
PCB
Notes:
1
Symbols: see above.
S1PH
Pressure switch (high)
2
Refer to the installation or service manual on how to use
BS1~BS4 push buttons and DS1‑1~DS1‑2 switches.
S1S
Operation switch (REMOTE/OFF/ON)
SW1
Low‑noise mode switch
3
Do not operate the unit by short-circuiting protection device
S1PH.
SW2
External operation switch
4
The capacity of this contact is 220~240 V AC – 0.5 A (total of
caution output, warning output, run output, and operation
output).
U, V, W
(A2P)
Connector
V1R (A2P)
IGBT power module
Diode module
5
The initial setting is "0" (OFF). To operate, set to
"1" (REMOTE) or "2" (ON).
V2R, V3R
(A2P)
6
To use the remote switch, use a voltage-free contact for
microcurrent (<1 mA - 12 V DC). For instructions on how to
use the remote switch, refer to the technical engineering data.
X*A
PCB connector
X*M
Terminal strip
X*Y
Connector
The initial state of SW1 is "open" (normal mode). To activate
low‑noise mode, close the contact.
Y1E
Electronic expansion valve (subcool)
Z*C
Noise filter (ferrite core)
Z*F (A1P)
Noise filter
7
Legend for wiring diagram LRMEQ3+4:
A1P
Printed circuit board (main)
A2P
Printed circuit board (inverter)
BS* (A1P)
Push buttons (MODE, SET, RETURN, TEST, RESET)
C* (A2P)
Capacitor
DS1 (A1P)
DIP switch
E, E1 (A1P) Connector
F1U (A1P)
Fuse (T 31.5 A / 500 V)
F1U (A2P)
Fuse (T 5 A / 250 V)
F2U (A1P)
Fuse (T 31.5 A / 500 V)
F3U
Fuse (T 1.0 A / 250 V)
F3U (A1P)
Fuse (T 6.3 A / 250 V)
F4U
Fuse (T 1.0 A / 250 V)
F4U (A1P)
Fuse (T 6.3 A / 250 V)
F5U (A1P)
Fuse (T 6.3 A / 250 V)
HAP (A*P)
Running LED (service monitor is green)
H*P (A1P)
LED (service monitor is orange)
K1M (A2P)
Magnetic contactor
K*R (A*P)
Magnetic relay
L1R
Reactor
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
Installer and user reference guide
39
14 About the system
For the user
14
About the system
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
System layout
14.1
16.2
Operating the system
16.2.1
About operating the system
▪ To start and stop operation of the outdoor unit, use the external
operation switch.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
17
Energy saving and optimum
operation
▪ Turn off the main power supply switch to the unit when the unit is
not used for longer periods of time. If the switch is on, it consumes
electricity. Before restarting the unit, turn on the main power
supply switch 6 hours before operation to ensure smooth running.
a
b
c
a
b
c
d
15
d
18
Outdoor unit (ZEAS condensing unit)
Refrigerant piping
Indoor unit (Blower coil)
Indoor unit (Showcase)
Maintenance and service
NOTICE
Never inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
WARNING
Before operation
This unit contains electrical and hot parts.
Never replace a fuse with a fuse of a wrong ampere ratings
or other wires when a fuse blows out. Use of wire or
copper wire may cause the unit to break down or cause a
fire.
WARNING
CAUTION
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
Do not insert fingers, rods or other objects into the air inlet
or outlet. Do not remove the fan guard. When the fan is
rotating at high speed, it will cause injury.
WARNING
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
CAUTION
CAUTION
It is dangerous to inspect the unit while the fan is running.
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
Be sure to turn off the main switch before executing any
maintenance task.
CAUTION
CAUTION
Do not operate the system when using a room fumigationtype insecticide. This could cause the chemicals to
become deposited in the unit, which could endanger the
health of those who are hypersensitive to chemicals.
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
Pay attention to the fan.
Water pressure
Check whether the water pressure is above 1 bar. If it is lower, add
water.
16
Operation
16.1
Operation range
18.1
Maintenance after a long stop
period
E.g., at the beginning of the season.
Use the system in the following temperature ranges for safe and
effective operation.
▪ Check and remove everything that might be blocking inlet and
outlet vents of the outdoor unit.
Cooling
Outdoor temperature
Evaporating temperature
Installer and user reference guide
40
–20~43°C DB
–20~5°C
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
19 Troubleshooting
18.2
About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
WARNING
The refrigerant in the system is safe and normally does not
leak. If the refrigerant leaks in the room, contact with a fire
of a burner, a heater or a cooker may result in a harmful
gas.
Turn off any combustible heating devices, ventilate the
room and contact the dealer where you purchased the unit.
Do not use the system until a service person confirms that
the portion where the refrigerant leaks is repaired.
18.3
18.3.1
After-sales service and warranty
Warranty period
▪ This product includes a warranty card that was filled in by the
dealer at the time of installation. The completed card has to be
checked by the customer and stored carefully.
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
18.3.2
Recommended maintenance and
inspection
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent. As taking
apart and cleaning interiors of units requires technical expertise and
in order to ensure the best possible maintenance of your units, we
recommend to enter into a maintenance and inspection contract on
top of normal maintenance activities. Our network of dealers has
access to a permanent stock of essential components in order to
keep your unit in operation as long as possible. Contact your dealer
for more information.
When asking your dealer for an intervention, always state:
▪ The complete model name of the unit.
▪ The manufacturing number (stated on the nameplate of the unit).
▪ The installation date.
▪ The symptoms or malfunction, and details of the defect.
WARNING
▪ Do not modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation
may cause an electric shock or fire. Contact your
dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and non-combustible, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
19
Troubleshooting
If system malfunctions are likely to degrade the articles in the room/
showcase, you can ask your installer to install an alarm (example:
lamp). For more information, contact your installer.
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire. Contact your dealer.
The system must be repaired by a qualified service person:
Malfunction
Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does not properly work.
Turn off the main power
switch.
If water leaks from the unit.
Stop the operation.
The operation switch does not work
well.
Turn off the power.
If the system does not properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
Malfunction
Measure
If the system does not ▪ Check if there is no power failure. Wait
operate at all.
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
The system stops
immediately after
starting operation.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
The system operates
but cooling is
insufficient.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the indoor unit is not frosted up.
Defrost the unit manually, or shorten the
defrost operation cycle.
▪ Check if there are not too many articles
inside the room/showcase. Remove a
couple of articles.
▪ Check if there is smooth air circulation
inside the room/showcase. Reorganise
the articles inside the room/showcase.
▪ Check if there is not too much dust on
the outdoor unit heat exchanger.
Remove the dust with a brush or vacuum
cleaner, without using water. If
necessary, consult your dealer.
▪ Check if there is cold air leaking outside
of the room/showcase. Stop the air from
leaking outside.
▪ Check if you did not set the indoor unit
setpoint temperature too high. Set the
setpoint appropriately.
▪ Check if there are no high-temperature
articles stored in the room/showcase.
Always store articles after they have
cooled down.
▪ Check if the door is not opened too long.
Reduce the opening time of the door.
Installer and user reference guide
41
20 Relocation
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
22
19.1
Authorized installer
Technical skilled person who is qualified to install the
product.
Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
19.1.1
Symptom: The system does not operate
▪ The system does not start immediately after it is turned ON again.
If the operation lamp lights, the system is in normal condition. To
prevent overloading of the compressor motor, the system starts 5
minutes after it is turned ON again in case it was turned OFF just
before.
▪ The system does not start immediately after the power supply is
turned on. Wait one minute until the micro computer is prepared
for operation.
19.1.2
Symptom: The unit does not stop
immediately when operation is stopped
Glossary
Dealer
Sales distributor for the product.
User
Person who is owner of the product and/or operates the
product.
Applicable legislation
All international, European, national and local directives,
laws, regulations and/or codes that are relevant and
applicable for a certain product or domain.
Service company
Qualified company which can perform or coordinate the
required service to the product.
Installation manual
Instruction manual specified for a certain product or
application, explaining how to install, configure and maintain
it.
This is to prevent components from being damaged. The unit will
stop in a little while.
Operation manual
Instruction manual specified for a certain product or
application, explaining how to operate it.
19.1.3
Maintenance instructions
Instruction manual specified for a certain product or
application, which explains (if relevant) how to install,
configure, operate and/or maintain the product or
application.
Symptom: Noise (Outdoor unit)
▪ A continuous low hissing sound is heard when the system is in
cooling operation. This is the sound of refrigerant gas flowing
through both indoor and outdoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation. This is the noise of refrigerant caused by flow
stop or flow change.
▪ When the tone of operating noise changes. This noise is caused
by the change of frequency.
19.1.4
Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the unit.
19.1.5
Symptom: The outdoor unit fan does not
spin
Accessories
Labels, manuals, information sheets and equipment that are
delivered with the product and that need to be installed
according to the instructions in the accompanying
documentation.
Optional equipment
Equipment made or approved by Daikin that can be
combined with the product according to the instructions in
the accompanying documentation.
Field supply
Equipment not made by Daikin that can be combined with
the product according to the instructions in the
accompanying documentation.
During operation. The speed of the fan is controlled in order to
optimise product operation.
20
Relocation
Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
21
Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit.
NOTICE
Do not try to dismantle the system yourself: the dismantling
of the system, treatment of the refrigerant, oil and other
parts must comply with applicable legislation. Units must
be treated at a specialised treatment facility for reuse,
recycling and recovery.
Installer and user reference guide
42
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1 – 2017.07
4P500362-1 2017.07
Copyright 2016 Daikin