Installer and user
reference guide
Air-cooled refrigeration condensing unit
LRMEQ3AY1 LRMEQ4AY1
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
6.7
6
6
For the installer
6
3 About the box
6
6.8
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.......
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............................................................................
About the indoor units ...............................................................
4.5.1
About reusing existing indoor heat exchangers ..........
5 Preparation
5.1
5.2
5.3
5.4
Overview: Preparation...............................................................
Preparing 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
Refrigerant piping length and height difference ..........
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 ..............................................
6.4.1
About connecting the refrigerant piping ......................
6.4.2
Precautions when connecting the refrigerant piping ...
6.4.3
Guidelines when connecting the refrigerant piping .....
6.4.4
Pipe bending guidelines..............................................
Installer and user reference guide
2
6
7
7
7
7
7
7
7
8
8
8
8
8
6.9
7 Configuration
7.1
7.2
8
8
8
9
10
10
11
11
11
11
11
12
12
12
13
13
13
13
13
13
13
13
13
14
14
14
14
14
14
15
6.4.5
To flare the pipe end ....................................................
6.4.6
To braze the pipe end ..................................................
6.4.7
Using the stop valve and service port ..........................
6.4.8
Guidelines when installing a sight glass ......................
6.4.9
Guidelines when installing a dryer ...............................
6.4.10 To connect the refrigerant piping to the outdoor unit ...
6.4.11 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 .............................................
25
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..................................................
8 Commissioning
8.1
8.2
8.3
8.4
15
15
15
16
17
17
17
18
18
18
18
18
19
19
19
19
19
20
20
21
21
22
22
22
23
23
23
24
24
25
25
25
25
25
25
26
26
26
27
27
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 ........................................................
27
27
28
28
28
28
29
29
9 Hand-over to the user
29
10 Maintenance and service
29
10.1
10.2
10.3
10.4
Overview: Maintenance and service ..........................................
Maintenance safety precautions.................................................
10.2.1 To prevent electrical hazards.......................................
Checklist for yearly maintenance of the outdoor unit .................
About service mode operation....................................................
10.4.1 To use vacuum mode ..................................................
10.4.2 To recover refrigerant ..................................................
11 Troubleshooting
11.1
11.2
11.3
30
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 .................................................
12 Disposal
29
29
29
30
30
30
30
30
30
30
30
31
32
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
1 General safety precautions
13 Technical data
13.1
13.2
13.3
13.4
13.5
13.6
13.7
33
Overview: Technical data ..........................................................
Dimensions: Outdoor unit..........................................................
Service space: Outdoor unit ......................................................
Components: Outdoor unit ........................................................
Piping diagram: Outdoor unit.....................................................
Wiring diagram: Outdoor unit ....................................................
Technical specifications: Outdoor unit.......................................
DANGER: RISK OF BURNING
33
33
34
36
37
38
40
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
WARNING: FLAMMABLE MATERIAL
WARNING
Indicates a situation that could result in death or serious
injury.
For the user
41
14 About the system
41
14.1
CAUTION
Indicates a situation that could result in minor or moderate
injury.
System layout............................................................................ 41
15 Before operation
41
NOTICE
16 Operation
41
Indicates a situation that could result in equipment or
property damage.
16.1
16.2
Operation range ........................................................................ 41
Operating the system ................................................................ 41
16.2.1 About operating the system ........................................ 41
17 Energy saving and optimum operation
42
18 Maintenance and service
42
18.1
18.2
18.3
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
42
42
42
42
42
43
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 ............
19.1.6 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................
43
43
43
43
44
44
INFORMATION
Indicates useful tips or additional information.
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
To prevent electric shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet hands.
44
20 Relocation
44
21 Disposal
44
22 Glossary
44
▪ 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:
1
General safety precautions
1.1
About the documentation
▪ 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 authorized installer.
1.1.1
Meaning of warnings and symbols
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.
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
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.
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.
1.3.2
1.3
For the installer
1.3.1
General
If you are not sure how to install or operate the unit, contact your
dealer.
NOTICE
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.
WARNING
Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions described in the Daikin documentation).
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 aluminum fins of the unit.
NOTICE
▪ Do NOT place any objects or equipment on top of the
unit.
▪ Do NOT sit, climb or stand on the unit.
Installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ 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:
▪ 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).
WARNING
Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:
▪ Excessive refrigerant concentrations in a closed room
can lead to oxygen deficiency.
▪ Toxic gas may be produced if refrigerant gas comes
into contact with fire.
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+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
1 General safety precautions
WARNING
WARNING
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
NOTICE
WARNING
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
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
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
WARNING
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
WARNING
1.3.5
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
▪ 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
Then
Charge with the cylinder upright.
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
Water
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.
A siphon tube is NOT present
Charge with the cylinder upside
down.
▪ Do NOT leave the unit unattended when the service
cover is removed.
WARNING
▪ Open refrigerant cylinders slowly.
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, shall be installed in the fixed wiring.
▪ Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
CAUTION
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.
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
5
2 About the documentation
WARNING
WARNING
▪ ONLY use copper wires.
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ Make sure all covers are closed before starting up the
unit.
▪ 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.
NOTICE
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
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.
▪ 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:
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.
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
Documentation set
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
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:
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ Over-tightening the terminal screws may break them.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
▪ Installation and operation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪ Installer and user reference guide:
▪ Preparation of the
reference data,…
installation,
technical
specifications,
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original documentation is written in English. All other languages
are translations.
For the installer
3
About the box
3.1
Overview: About the box
It contains information about:
▪ Unpacking and handling the units
▪ Removing the accessories from the units
Keep the following in mind:
This chapter describes what you have to do after the box with the
outdoor unit is delivered on-site.
Installer and user reference guide
6
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
4 About the units
▪ At delivery, the unit must be checked for damage. Any damage
must be reported immediately to the carrier's claims agent.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ 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.
▪ Choose on beforehand the path along which the unit is to be
brought in.
3.2
Outdoor unit
3.2.1
To unpack the outdoor unit
3.2.3
1
2
To remove the accessories from the
outdoor unit
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 13.
2
Remove the accessories.
a
b
1×
a
b
c
d
1×
c
1×
d
1×
General safety precautions
Outdoor unit installation and operation manual
Fluorinated greenhouse gases label
Multilingual fluorinated greenhouse gases label
4
About the units
4.1
Overview: About the units
This chapter contains information about:
▪ Identification of the outdoor unit.
▪ Where the outdoor unit fits in the system layout.
▪ With which indoor units you can combine the outdoor units.
3.2.2
To handle the outdoor unit
Carry the unit slowly as shown:
4.2
Identification
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
CAUTION
To avoid injury, do NOT touch the air inlet or aluminum fins
of the unit.
Forklift. As long as the unit remains on its pallet, you can also use a
forklift.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
7
5 Preparation
4.2.1
Identification label: Outdoor unit
Location
▪ 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 mechanical thermostatic expansion valve for
each indoor unit.
▪ 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 mechanical
thermostatic expansion valve being used.
▪ Refrigerant flow. Route the path to the indoor unit heat
exchanger so that the refrigerant flow is from top to bottom.
▪ Multiple indoor units. When installing multiple indoor units,
install them at the same level. A combination of showcases and
blower coils is allowed if they are installed on the same floor.
Model identification
▪ Defrosting type. Use either off-cycle defrosting or electric heater
defrosting models. Do NOT use hot-gas defrosting models.
Example: LR ME Q 4 A Y1 [*]
Code
Explanation
4.5.1
About reusing existing indoor heat
exchangers
LR
ZEAS condensing unit
ME
Medium temperature refrigeration
Q
Refrigerant R410A
3+4
Capacity class
A
Model series
Reuse not allowed
Y1
Power supply
[*]
Minor model change indication
You may not reuse existing indoor heat exchangers in the following
cases:
4.3
In some cases you may reuse existing indoor heat exchangers, in
other cases not.
▪ When the design pressure is insufficient. (minimum design
pressure = 2.5 MPa [25 bar])
About the outdoor unit
This installation manual concerns the ZEAS condensing unit.
This unit is intended for outdoor installation and aimed for air to air
cooling applications.
Specification
LRMEQ3+4
▪ 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.
▪ When the heat exchanger is contaminated. Foreign materials
(including oils for fabrication) must be ≤30 mg/10 m.
Capacity (cooling)
5.90~8.40 kW
Reuse allowed
Ambient design temperature (cooling)
–10~43°C DB
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.
4.4
System layout
If the old condensing unit did NOT use the same refrigerant (R410A)
as the new one, make sure the mechanical thermostatic expansion
valve is compatible with R410A.
a
b
c
a
b
c
d
d
Outdoor unit (ZEAS condensing unit)
Refrigerant piping
Indoor unit (Blower coil)
Indoor unit (Showcase)
5
Preparation
5.1
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
4.5
About the indoor units
NOTICE
▪ Preparing the refrigerant piping
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.
▪ Preparing the electrical wiring
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 mechanical thermostatic
expansion valve on each indoor unit. Insulate the feeler block of
the mechanical thermostatic expansion valve.
Installer and user reference guide
8
▪ Preparing the installation site
5.2
Preparing 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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
5 Preparation
5.2.1
Do NOT install the unit in the following places:
Installation site requirements of the
outdoor unit
the
▪ Sound sensitive areas (e.g. near a bedroom and the like), 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.
▪ Service space requirements. See the "Technical data"
chapter.
▪ 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.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
INFORMATION
Also read the following requirements:
▪ General installation site requirements.
"General safety precautions" chapter.
See
CAUTION
▪ Where the voltage fluctuates a lot
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
▪ In vehicles or vessels
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
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.
NOTICE
Install the outdoor unit away from direct sea winds.
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
Example: Behind the building.
▪ Where acidic or alkaline vapour is present
b
NOTICE
a
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.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
ab
c
d
ab
e
f
ab
g
c
If the outdoor unit is exposed to direct sea winds, install a
windbreaker.
▪ Height of windbreaker≥1.5×height of outdoor unit
▪ Mind the service space requirements when installing the
windbreaker.
d
c
d
0
a
c
≥1
50
≥150
0
b
≥1500
≥1500
(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
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.
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:
▪ 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).
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
9
5 Preparation
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
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.
The unit of measurement of the concentration is kg/m3 (the weight in
kg of the refrigerant gas in 1 m3 volume of the occupied space).
a
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
a
Make sure there is enough installation space
Set the air outlet side at a right angle to the direction of the wind.
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
a
a
b
a
b
5.2.2
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.
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
a
c
Calculate the amount of refrigerant (kg) charged to each system
separately.
Formula
A+B=C
A
Amount of refrigerant in a single unit system
(amount of refrigerant with which the system
is charged before leaving the factory)
B
Additional charging amount (amount of
refrigerant added locally)
C
Total amount of refrigerant (kg) in the
system
d
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.
b
c
2
a
b
c
d
5.2.3
Direction of the refrigerant flow
Room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Snow cover or shed
Pedestal (minimum height = 150 mm)
Prevailing wind direction
Air outlet
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.
D
Where there are no smaller room divisions:
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.
Installer and user reference guide
10
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
5 Preparation
E
Where there is a room division, but there is an opening
between the rooms sufficiently large to permit a free
flow of air back and forth.
Item
Description
Flare connections
May not be reused. Make new ones to
prevent leaks. See "6.4.3 Guidelines when
connecting the refrigerant piping" on
page 14 and "6.4.5 To flare the pipe
end" on page 15.
Welded connections
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.
a b
a Opening between the rooms
5.3.2
b Partition (Where there is an opening without a door
or where there are openings above and below the door
which are each equivalent in size to 0.15% or more of
the floor area.)
3
4
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
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.
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)
NOTICE
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 we should take special attention to
check the tightness of the installation.
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
Refrigerant piping requirements
NOTICE
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.
In some cases you may reuse existing piping, in other cases not.
5.3.3
Reuse not allowed
▪ Piping material: Phosphoric acid deoxidised seamless copper.
You may not reuse existing piping in the following cases:
▪ Piping temper grade and thickness:
▪ 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.
Outer diameter
(Ø)
6.4 mm (1/4")
Reuse allowed
Item
Piping material
Piping length and
height difference
Piping insulation
Description
Must comply with requirements. See
"5.3.2 Refrigerant piping requirements" on
page 11.
Thickness (t)(a)
Annealed (O)
≥0.80 mm
Annealed (O)
≥0.99 mm
Ø
t
12.7 mm (1/2")
(a)
In other cases than above, you may reuse existing piping but keep
the following in mind:
Temper grade
9.5 mm (3/8")
15.9 mm (5/8")
▪ When the copper piping is corroded.
Piping diameter
Refrigerant piping material
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.
▪ Flare connections: Only use annealed material.
5.3.4
To select the piping size
Determine the proper size referring to following tables and reference
figure (only for indication).
If deteriorated, must be replaced.
Must comply with requirements. See
"6.6 To insulate the refrigerant piping" on
page 19.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
11
5 Preparation
Requirement
1
Limit
Maximum actual piping length
30 m
▪ Example: a+b+c+d2≤Limit
A
Maximum total piping length
D2
2
2
30 m
▪ Example: a+b+c+d1+d2+e+f≤Limit
D1
E
F
H
C
B
3
Maximum length first branch kit-indoor
unit
3
10 m
▪ Example: b+c+d2≤Limit
e
f
a
d1
b
1
2
3
A~F
a~f
H
c
Maximum height
Outdoor higher than
difference outdoor- indoor
indoor
▪ Example: H≤Limit
d2
Outdoor unit
Indoor unit (Showcase)
Indoor unit (Blower coil)
Liquid piping
Gas piping
Height difference outdoor-indoor
5 m
Outdoor lower than
indoor
0 m
0 m(a)
Maximum height difference indoor-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:
(a)
A combination of showcases and blower coils is allowed if
they are installed on the same floor.
▪ Select the pipe size nearest to the required size.
5.4
Preparing electrical wiring
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
5.4.1
Safety device requirements
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.7.3 To determine the additional refrigerant
amount" on page 20.
A/a: Piping between outdoor unit and piping
branching
Use the same diameters as the connections on the outdoor units:
Liquid piping
Ø9.5 mm
Gas piping
Ø15.9 mm
Power supply
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
Minimum circuit Recommended
ampacity
fuses
LRMEQ3+4
13.5 A
Power supply
16 A
3N~ 50 Hz
B+C/b+c: Piping between piping branching
Use diameters depending on the total capacity of the indoor units
connected downstream.
Capacity
Liquid piping
Operation switch, low-noise switch and error output wiring
NOTICE
Piping outer
diameter
<4.0 kW
Ø6.4 mm
4.0≤x<8.4 kW
Ø9.5 mm
Gas piping
380-415 V
<1.0 kW
Ø9.5 mm
1.0≤x<6.0 kW
Ø12.7 mm
6.0≤x<8.4 kW
Ø15.9 mm
Operation switch. An operation switch is required to turn
outdoor unit operation ON/OFF. The outdoor unit cannot
operate without it. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑25]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
D~F/d~f: Piping between piping branching and
indoor unit
NOTICE
Use the same diameters as the connections (liquid, gas) on the
indoor units.
Error output. If system malfunctions are likely to degrade
the articles in the room/showcase, you can install an alarm
(example: lamp). If a malfunction occurs, a signal
(220-240 V AC) is given to the error output (X2M/E1/E2).
Use an alarm with a maximum load of 0.5 A.
NOTICE
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.
Wiring
Sheathed + shielded cable (2
wires)
Vinyl cords
5.3.5
Refrigerant piping length and height
difference
0.75~1.25 mm²
Maximum wiring length
130 m
The piping lengths and height differences must comply with the
following requirements.
(see example in "5.3.4 To select the piping size" on page 11)
Installer and user reference guide
12
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
6
Installation
6.3
Mounting the outdoor unit
6.1
Overview: Installation
6.3.1
About mounting the outdoor unit
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.
▪ Checking the refrigerant piping.
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
1
2
3
Providing the installation structure.
Installing the outdoor unit.
Preventing the outdoor unit from falling over.
4
Protecting the unit against snow and wind by installing a snow
cover and baffle plates. See "Preparing installation site" in
"5 Preparation" on page 8.
6.3.2
▪ Charging refrigerant.
Precautions when mounting the outdoor
unit
▪ Connecting the electrical wiring.
INFORMATION
▪ Finishing the outdoor installation.
Also read the precautions and requirements in the
following chapters:
▪ Finishing the indoor installation.
INFORMATION
▪ General safety precautions
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.
▪ Preparation
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.
6.2
Opening the units
6.2.1
About opening the units
At certain times, you have to open the unit. Example:
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:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
4× M12
Do NOT leave the unit unattended when the service cover
is removed.
6.2.2
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
0
DANGER: RISK OF BURNING
62
0
>150
)
55
-3
45
(3
35
(mm)
a
a
Make sure not to cover the drain holes.
INFORMATION
20
2
The recommended height of the upper protruding part of
the bolts is 20 mm.
1 1×
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
13
6 Installation
▪ Keeping in mind the guidelines for:
NOTICE
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.
a
6.3.4
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
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
DANGER: RISK OF BURNING
4× M12
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
▪ Only use R410A when adding refrigerant.
To prevent the outdoor unit from falling
over
▪ 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.
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.
▪ Install the piping so that the flare is NOT subjected to
mechanical stress
▪ 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
(see figure below).
Unit
Outdoor unit
Indoor unit
6.4
Connecting the refrigerant piping
6.4.1
About connecting the refrigerant piping
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the dryer and sight glass
▪ Connecting refrigerant piping branching
▪ Connecting the refrigerant piping to the indoor units (see the
installation manual of the indoor units)
<1 month
Pinch or tape the pipe
Regardless of the
period
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.
Make sure the outdoor and indoor units are mounted.
Connecting the refrigerant piping involves:
Protection method
Pinch the pipe
INFORMATION
Before connecting the refrigerant piping
Typical workflow
Installation period
>1 month
6.4.3
Guidelines when connecting the
refrigerant piping
Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before
tightening firmly.
▪ Insulating the refrigerant piping
Installer and user reference guide
14
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
a
b
c
▪ Always use two wrenches together when loosening a flare nut.
▪ Always use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut cracking
and leaks.
a
a
b
c
6.4.6
b
Flare’s inner surface must be flawless.
The pipe end must be evenly flared in a perfect circle.
Make sure the flare nut is fitted.
To braze the pipe end
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
c
≤Ø25.4
d
1
a
b
c
d
Torque wrench
Spanner
Piping union
Flare nut
Piping size
(mm)
Tightening
Flare
torque (N•m) dimensions (A)
(mm)
Ø6.4
15~17
8.7~9.1
Ø9.5
33~39
12.8~13.2
Ø12.7
50~60
16.2~16.6
Ø15.9
63~75
19.3~19.7
6.4.4
Flare shape
(mm)
90°±2
45 ±
° 2
A
R=0.4~0.8
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 (just enough so it can be felt
on the skin) with a pressure-reducing valve.
a
Pipe bending guidelines
b
c
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40 mm or larger).
6.4.5
f
To flare the pipe end
a
b
c
d
e
f
CAUTION
▪ Incomplete flaring may cause refrigerant gas leakage.
▪ Do NOT re-use flares. Use new flares to prevent
refrigerant gas leakage.
▪ Use flare nuts that are included with the unit. Using
different flare nuts may cause refrigerant gas leakage.
1
Cut the pipe end with a pipe cutter.
2
Remove burrs with the cut surface facing downward so that the
chips do not enter the pipe.
a
b
a
b
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.
6.4.7
Cut exactly at right angles.
Remove burrs.
d
Using the stop valve and service port
To handle the stop valve
3
Remove the flare nut from the stop valve and put the flare nut
on the pipe.
4
Flare the pipe. Set exactly at the position as shown in the
following illustration.
▪ 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.
A
a
Conventional flare tool
Flare tool for
R410A (clutch
type)
A
5
0~0.5 mm
Clutch type
Wing nut type
(Ridgid-type)
(Imperial-type)
1.0~1.5 mm
Check that the flaring is properly made.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
1.5~2.0 mm
b
c
d
a
b
c
d
Service port and service port cover
Stop valve
Field piping connection
Stop valve cover
Installer and user reference guide
15
6 Installation
a
e
b
d
NOTICE
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.
c
a
b
c
d
e
Service port
Stop valve cover
Hexagon hole
Shaft
Seal
ab
b c
a
b
c
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.
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.
NOTICE
2
1
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.
3
4
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.
a
b
c
Cover (do NOT apply thread-locking fluid)
Sealing part (do NOT apply thread-locking fluid)
Screw thread with thread-locking fluid
Tightening torques
Result: The valve is now closed.
Closing direction:
Stop valve
size (mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Take
care not to damage it.
▪ After handling the stop valve, make sure to tighten the stop valve
cover securely. For the tightening torque, refer to the table below.
▪ Check for refrigerant leaks after tightening the stop valve cover.
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
6.4.8
Guidelines when installing a sight glass
Install a sight glass on the liquid piping:
Diameter
9.5 mm
Where/how
Install the sight glass before the dryer, as near
to the outdoor unit as possible. Install
horizontally.
a
b
a Sight glass
b Dryer
Installer and user reference guide
16
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
When brazing
6.4.9
Follow the brazing instructions in the sight
glass manual.
Guidelines when installing a dryer
3
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.
a
4× Ø6 mm
b
NOTICE
Do NOT operate the unit without a dryer installed.
Possible consequence: Equipment malfunction.
Install a dryer on the liquid piping:
Dryer type
c
80 g (100% molecular sieve equivalent)
(DML083/DML083S: Danfoss made)
Where/how
4
Install the dryer after the sight glass, as near to
the outdoor unit as possible. Install
horizontally.
c
Do the following:
▪ Connect the liquid pipe (a) to the liquid stop valve.
▪ Connect the gas pipe (b) to the gas stop valve.
b
a
a
b
a Sight glass
5
Reattach the service cover and the piping intake plate.
6
Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
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).
a
If dryer paint burnt during brazing, repair it. For
repair paint details, contact the manufacturer.
Flow direction
6.4.10
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.
If the dryer specifies a flow direction, install
accordingly.
To connect the refrigerant piping to the
outdoor unit
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.
NOTICE
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.
1
Do the following:
▪ Remove the service cover (a) with screw (b).
▪ Remove the piping intake plate (c) with screw (d).
6.4.11
Guidelines when connecting piping
branching
Liquid piping branching
▪ Use Y-joints.
▪ Install horizontally. This will prevent an uneven refrigerant flow.
A
≤30°
a
b
d
2
A
c
a
Choose a piping route (a, b, c or d).
a
Y-joint for branching
Gas piping branching
▪ Use T-joints.
d
a
b
▪ Install branched piping above main piping. This will prevent
refrigerant oil from flowing back to non‑operating indoor units.
ab
c
a
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Main piping
Installer and user reference guide
17
6 Installation
b
T-joint for branching
6.5.3
Checking refrigerant piping: Setup
▪ Make sure the "horizontal" gas piping slopes down to the outdoor
unit.
p<
p>
A
a
B
d
g
f
C
N2
b
a
b
a
b
c
6.5
6.5.1
c
c
Gas piping sloping down from indoor units to branching
T-joint for branching
Gas piping sloping down from branching to outdoor unit
Checking the refrigerant piping
About checking the refrigerant piping
e
a
b
c
d
e
f
g
A
B
C
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
State of valve
Valve A
Open
Valve B
Open
Checking the refrigerant piping involves:
Valve C
Open
▪ Checking for any leakages in the refrigerant piping.
Liquid line stop valve
Close
▪ Performing vacuum drying to remove all moisture, air or nitrogen
in the refrigerant piping.
Gas line stop valve
Close
NOTICE
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.
Indoor units should also be leak and vacuum tested. Keep
any possible (field supplied) field piping valves open as
well.
All piping inside the unit has been factory tested for leaks.
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.
NOTICE
Make sure that all (field supplied) field piping valves are
OPEN (not outdoor unit stop valves!) before you start leak
test and vacuuming.
For more information on the state of the valves, refer to
"6.5.3 Checking refrigerant piping: Setup" on page 18.
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 18).
6.5.4
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) 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.
To check for leaks: Pressure leak test
1
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 (5 Torr absolute).
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
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.
NOTICE
NOTICE
To perform a leak test
2
Test for leaks by applying a bubble test solution to all piping
connections.
3
Discharge all nitrogen gas.
NOTICE
NOTICE
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
Installer and user reference guide
18
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).
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
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:
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).
1
Evacuate the system for at least 2 hours to a target vacuum of
–⁠100.7 kPa (–⁠1.007 bar/5 Torr).
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.
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.
Depending on whether you want to immediately charge
refrigerant through the refrigerant charge port 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 20 for more information.
6.7.2
4
INFORMATION
To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
▪ Make sure to insulate the connection piping and refrigerant piping
branching entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
▪ Take the following into account when determining the insulation
thickness:
Liquid pipe minimum temperature
20°C
Gas pipe minimum temperature
–10°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.
b
a
Charging additional refrigerant typically consists of the following
stages:
Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
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
Typical workflow
▪ Preparation
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.
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
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 25). If a malfunction code is present, see
"11.3 Solving problems based on error codes" on
page 30.
NOTICE
Close the front panel before any refrigerant charge
operation is executed. Without the front panel attached the
unit cannot judge correctly whether it is operating properly
or not.
NOTICE
a
b
Insulation material
Caulking etc.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
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
19
6 Installation
6.7.3
To determine the additional refrigerant
amount
4
Do one of the following:
If
Then
The determined additional
Disconnect the manifold from
refrigerant amount is reached the liquid line.
INFORMATION
For final charge adjustment in a test laboratory, contact
your dealer.
Continue with the "Checking
the sight glass" instructions.
Additional refrigerant to be charged=R (kg). R should be rounded off
in units of 0.1 kg.
Too much refrigerant is
charged
Recover refrigerant.
Disconnect the manifold from
the liquid line.
R=[(X1×Ø9.5)×0.059+(X2×Ø6.4)×0.022]+A1+A2
X1...2=Total length (m) of liquid piping size at Øa
Continue with the "Checking
the sight glass" instructions.
Parameter A1:
If the total capacity(a) of showcases is...
Then A1 is...
<5.0 kW
1.1 kg
5.0≤x<8.4 kW
2.3 kg
(a)
The determined additional
refrigerant amount is not
reached yet
Disconnect the manifold from
the liquid line.
Continue with the "Charging
refrigerant (via the
refrigerant charging port)"
instructions.
Capacity at evaporating temperature of –10°C
Parameter A2:
If the total capacity(a) of blower coils is...
Then A2 is...
<5.0 kW
0.6 kg
5.0≤x<8.4 kW
1.2 kg
(a)
Capacity at temperature difference (= evaporating
temperature – room temperature) of 10°C
Metric piping. When using metric piping, please take into account
following table concerning the weight factor to be allocated. It should
be substituted in the formula for R.
Inch piping
Checking the sight glass
If the determined additional refrigerant amount is reached by the
"Pre-charging refrigerant" instructions, continue as follows:
5
Open all outdoor unit stop valves.
6
Take all the precautions mentioned in "7 Configuration" on
page 25 and "8 Commissioning" on page 27 into account.
7
Turn on the power of the outdoor unit, but leave the external
operation switch turned off (see "6.8.5 To connect the electrical
wiring on the outdoor unit" on page 23).
8
Set the target evaporating temperature with setting [2‑8] (see
"7.2.8 Mode 2: Field settings" on page 27).
9
Turn on the power of the indoor units.
Metric piping
Size (Ø) (mm)
Weight factor
Size (Ø) (mm)
Weight factor
6.4
9.5
0.022
6
0.018
0.059
10
0.065
10 Turn on the external 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 21 and
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the external 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 (via the refrigerant charging
port)" instructions, but do NOT exceed 10% of the determined
additional refrigerant amount (see "6.7.3 To determine the
additional refrigerant amount" on page 20).
b
N2
b
c
d
e
a
b
c
d
e
f
g
A
B
C
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
2
Open valves C and B.
3
Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves C and B.
Installer and user reference guide
20
c
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 external operation switch.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
d
Charging refrigerant (via the refrigerant charging port)
The remaining additional refrigerant charge can be charged by
operating the outdoor unit.
NOTICE
13 Connect as shown. Make sure valve A is closed.
p<
Make sure to open all stop valves after (pre-) charging the
refrigerant.
p>
A
Operating with the stop valves closed will damage the
compressor.
d
b
NOTICE
d
a
A lot of foam in the liquid
23 Turn off the external operation switch.
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9 N•m.
c
a
b
c
d
A
Weighing scales
Refrigerant R410A tank (siphon system)
Vacuum pump
Refrigerant charge port
Valve A
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.
NOTICE
The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already factory
charged with refrigerant, so be careful when connecting
the charge hose.
a
14 Open all outdoor unit stop valves. At this point, valve A must
remain closed!
b
c
15 Take all the precautions mentioned in "7 Configuration" on
page 25 and "8 Commissioning" on page 27 into account.
a
b
c
16 Turn on the power of the outdoor unit, but leave the external
operation switch turned off (see "6.8.5 To connect the electrical
wiring on the outdoor unit" on page 23).
17 Set the target evaporating temperature with setting [2‑8] (see
"7.2.8 Mode 2: Field settings" on page 27).
6.7.5
Cover (do NOT apply thread-locking fluid)
Sealing part (do NOT apply thread-locking fluid)
Screw thread with thread-locking fluid
Error codes when charging refrigerant
18 Turn on the power of the indoor units.
INFORMATION
19 Turn on the external operation switch.
If a malfunction occurs, a signal (220-240 V AC) is given to
the error output (X2M/E1/E2), and the H2P LED on the
main PCB is lit.
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 21 and
solve the malfunction accordingly.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action, "11.3 Solving
problems based on error codes" on page 30.
6.7.6
▪ Aborting the manual refrigerant charge is possible by
turning OFF the external operation switch. The unit will
stop and return to idle condition.
20 Open valve A.
21 Charge refrigerant until the remaining determined additional
refrigerant amount is added (see "6.7.3 To determine the
additional refrigerant amount" on page 20), and then close
valve A.
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 20).
b
c
d
1
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
a
O
X
a
b
c
Sealing state (= sufficient refrigerant)
Insufficient refrigerant
Sight glass
Full of liquid
A little foam in the liquid
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
21
6 Installation
NOTICE
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
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
▪ Field wiring 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
Precautions when connecting electrical
wiring
DANGER: RISK OF ELECTROCUTION
6.8
Connecting the electrical wiring
6.8.1
About connecting the electrical wiring
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, operation switch, low-noise switch and error output).
Connecting the main power supply.
3
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, shall be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
Field wiring: Overview
▪ Make sure the field wiring complies with the applicable
legislation.
Field wiring consists of the following:
3N~ 50 Hz
380-415 V
L1 L2 L3
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
a
▪ 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.
b
c
L1 L2 L3 N
X1M
A B C
d
a
b
c
d
e
f
e
E1 E2
X2M
f
Earth leakage circuit breaker
Fuse
Power supply (including earth) (sheathed cable)
Low-noise switch
Operation switch
Error output
NOTICE
Operation switch. An operation switch is required to turn
outdoor unit operation ON/OFF. The outdoor unit cannot
operate without it. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑25]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
NOTICE
Error output. If system malfunctions are likely to degrade
the articles in the room/showcase, you can install an alarm
(example: lamp). If a malfunction occurs, a signal
(220-240 V AC) is given to the error output (X2M/E1/E2).
Use an alarm with a maximum load of 0.5 A.
Installer and user reference guide
22
WARNING
▪ 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.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
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
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
Wire type
NOTICE
Installation method
cb
Single core wire
If the power supply has a missing or wrong N-phase,
equipment will break down.
A
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.
c
a
a
a Curled single core wire
b Screw
NOTICE
c Flat washer
Never remove a thermistor, sensor, etc., when connecting
power wiring and transmission wiring. (If operated without
thermistor, sensor, etc., the compressor may break down.)
cb
Stranded conductor
wire with round
crimp-style terminal
a
▪ 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.
B
a Terminal
b Screw
c Flat washer
Tightening torques
Wiring
▪ Replace two of the three phases (L1, L2, and L3)
during reverse-phase protection abnormality.
Screw size
Tightening
torque (N•m)
M5
2.2~2.7
M3.5
0.8~0.97
Power supply wiring
Guidelines when knocking out knockout
holes
NOTICE
Precautions when making knockout holes:
bc
B
a
NOTICE
6.8.3
AA´
A´
(power supply + shielded
ground)
Operation switch, lownoise switch and error
output
▪ Avoid damaging the casing.
▪ 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.
6.8.5
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
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).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
a
b
a
b
c
6.8.4
c
1
Remove the service cover. See "6.2.2 To open the outdoor
unit" on page 13.
2
Strip insulation (20 mm) from the wires.
a
Knockout hole
Burr
Sealant etc.
Guidelines when connecting the electrical
wiring
a
b
Keep the following in mind:
▪ If stranded conductor wires are being used, install a round crimpstyle terminal on the tip. Place the round crimp-style terminal on
the wire up to the covered part and fasten the terminal with the
appropriate tool.
b
3
Strip wire end to this point
Excessive strip length may cause electrical shock or
leakage.
Connect the operation switch as follows:
A B C
E1 E2
X2M
NOTICE
b
a
a
b
Operation switch. An operation switch is required to turn
outdoor unit operation ON/OFF. The outdoor unit cannot
operate without it. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
Stranded conductor wire
Round crimp-style terminal
▪ Use the following methods for installing wires:
4
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Connect the low-noise switch as follows:
Installer and user reference guide
23
6 Installation
A B C
E1 E2
X2M
3
Routing through
the frame
b
a
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑25]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
5
E1 E2
b
a
a Power supply cable and error output
cable
Connect the error output as follows:
A B C
b Operation switch cable and low-noise
switch cable
X2M
Connecting to the
frame
NOTICE
When cables are routed from the unit, a
protection sleeve for the conduits (PG
insertions) can be inserted at the knockout
hole.
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.
Error output. If system malfunctions are likely to degrade
the articles in the room/showcase, you can install an alarm
(example: lamp). If a malfunction occurs, a signal
(220-240 V AC) is given to the error output (X2M/E1/E2).
Use an alarm with a maximum load of 0.5 A.
6
2
1
NOTICE
b
a
A B
Connect the power supply as follows:
3N~ 50 Hz
380-415 V
L1 L2 L3
a
a
bc
d
b
A Inside of the outdoor unit
c
B Outside of the outdoor unit
e
a Wire
L1 L2 L3 N
a
b
c
7
X1M
b Bush
Earth leakage circuit breaker
Fuse
Power supply cable
c Nut
d Frame
Fix the cables with cable ties.
e Hose
9
Reattach the service cover. See "6.9.1 To close the outdoor
unit" on page 24.
X1M
X2M
10 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
a
b
c
NOTICE
d
When closing the outdoor unit cover, make sure that the
tightening torque does NOT exceed 4.1 N•m.
e
f
a
b
c
d
e
f
8
Power supply (including earth)
Error output
Low-noise switch
Operation switch
Attachment plate
Cable tie
Route the wiring through the frame and connect it to it.
1
2 1×
Installer and user reference guide
24
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
7 Configuration
BS1~BS5
H1P~H7P
H8P
7
Configuration
7.1
Overview: Configuration
Push buttons
7‑LEDs display
LED for indication during initialisation
ON ( ) OFF ( ) Flashing ( )
Push buttons
This chapter describes what you have to do and know to configure
the system after it is installed.
It contains information about:
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.
▪ Making field settings
INFORMATION
BS1
BS2
BS3
BS4
BS5
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
MODE: For changing the set mode
SET: For field setting
RETURN: For field setting
Not used
Not used
7‑LEDs display
The display gives feedback about the field settings, which are
defined as [Mode-Setting]=Value.
7.2
Making field settings
7.2.1
About making field settings
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:
To configure the condensing unit, you must give input to the outdoor
unit's main PCB (A1P). This involves the following field setting
components:
[H1P - 32 + 16 + 8 + 4 + 2 + 1]
Description
H1P H2P H3P H4P H5P H6P H7P
Default situation
▪ Push buttons to give input to the PCB
(H1P OFF)
▪ A display to read feedback from the PCB
Mode 1
Field settings are defined by their mode, setting and value. Example:
[2‑8]=4.
(H1P flashing)
Mode 2
Mode 1 and 2
Mode
(H1P ON)
Description
Mode 1
(monitoring
settings)
Mode 2
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.
(field settings)
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.
7.2.2
To access the field setting components
See "6.2.2 To open the outdoor unit" on page 13.
7.2.3
Field setting components
Setting 8
0 + 0 + 8 + 0 + 0 + 0
Mode 1 can be used to monitor the current
situation of the outdoor unit. Some field setting
contents can be monitored as well.
(in mode 2)
(H2P~H7P = binary 8)
Value 4
0 + 0 + 0 + 4 + 0 + 0
(in mode 2)
(H2P~H7P = binary 4)
7.2.4
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.
Initialisation: default situation
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
Turn on the power supply of the outdoor unit, and turn on the
external operation switch. After initialisation, the display indication
state will be as below (default situation when shipped from factory).
a
NOTICE
The DIP switch (DS1 on A1P) is not used. Do NOT change
the factory setting.
The components to make field settings are as follows:
A2P
A1P
X1M
MODE
TEST/
HWL
IND
H1P
H2P
H3P
10~12 min
MASTER SLAVE L.N.O.P. DEMAND
H4P
H5P
H6P
H7P
BS1
BS2
BS3
BS4
BS5
MODE
SET
RETURN
TEST
RESET
X2M
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
MULTI
H8P
b
c
Installer and user reference guide
25
7 Configuration
a
b
c
Power ON
Default situation
LED indication when there is a malfunction
#
4
If the default situation is not displayed after 10~12 minutes, check
the malfunction code. Solve the malfunction code accordingly.
a BS3 [1×]
b BS2 [X×]
b: Change to 4. ("X×"
depends on the current
value, and the value that you
want to select.)
Use BS1 to switch between the default situation, mode 1 and
mode 2.
c BS3 [1×]
d BS3 [1×]
c: Enter the value in the
system.
S1
S1
B
[5
S1
d: Confirm. The system starts
operating according to the
setting.
B
B
S1
a
B
Button/display
a: Display the current value.
Switching between modes
s]
b
5
c
a
b
c
BS1
BS1 [5 s]
Action
Select value 4 (= –4°C).
Default situation (H1P OFF)
Mode 1 (H1P flashing)
Mode 2 (H1P ON)
Press BS1.
Press BS1 for at least 5 s.
7.2.7
INFORMATION
If you get confused in the middle of the process, press BS1
to return to the default situation.
BS1 [1×]
Quit mode 2.
Mode 1 (and default situation): Monitoring
settings
In mode 1 (and in default situation) you can read out some
information.
7‑LEDs display – Default situation (H1P OFF)
7.2.5
You can read out the following information:
To use mode 1
In mode 1 (and in default situation) you can read out some
information.
Value / Description
H6P
Shows the status of low noise operation.
OFF
Example: 7‑LEDs display – Default situation
Unit is currently not operating under low noise
restrictions.
You can read out the status of low noise operation as follows:
#
Action
1
Make sure the LEDs are
showing the default situation.
2
Check the status of LED
H6P.
Button/display
ON
Unit is currently operating under low noise
restrictions.
(H1P OFF)
Low noise operation reduces the sound generated by the
unit compared to nominal operating conditions.
H6P OFF: Unit is currently
not operating under low noise
restrictions.
Low noise operation can be set in mode 2. There are two
methods to activate low noise operation of the outdoor unit
system.
▪ The first method is to enable an automatic low noise
operation during night time by field setting. The unit will
operate at the selected low noise level during the
selected time frames.
H6P ON: Unit is currently
operating under low noise
restrictions.
▪ The second method is to enable low noise operation
based on an external input. For this operation a low noise
switch needs to be installed (see "6.8.5 To connect the
electrical wiring on the outdoor unit" on page 23).
Example: 7‑LEDs display – Mode 1
See "11.3.1 To display the error codes of the latest malfunctions" on
page 30.
7.2.6
To use mode 2
7‑LEDs display – Mode 1 (H1P flashing)
In mode 2 you can make field settings to configure the system.
You can read out the following information:
Setting
Example: 7‑LEDs display – Mode 2
You can change the value of setting [2‑8] (= Te target evaporating
temperature) to 4 (= –4°C) as follows:
#
Action
Button/display
1
Start from the default
situation.
2
Select mode 2.
BS1 [5 s]
3
Select setting 8.
BS2 [X×]
(
Value / Description
)
[1‑14]
Shows the latest malfunction
code.
For more information, see
"11.3 Solving problems based on
error codes" on page 30.
[1‑15]
Shows the 2nd last malfunction
code.
[1‑16]
("X×" depends on the setting
that you want to select.)
Shows the 3rd last malfunction
code.
(= binary 8)
Installer and user reference guide
26
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
8 Commissioning
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)
[2‑8]
–10°C
Te target evaporating temperature.
–8°C
–6°C
–4°C
(default)
–2°C
0°C
2°C
[2‑18]
Deactivated.
Fan high static pressure setting.
(default)
Activated.
In order to increase the static pressure the outdoor unit fan is
delivering, this setting should be activated. For details about this
setting, see technical specifications.
[2‑21]
Deactivated.
Refrigerant recovery/vacuuming mode.
(default)
Activated.
In order to achieve a free pathway to reclaim refrigerant out of the
system or to remove residual substances or to vacuum the system
it is necessary to apply a setting which will open required valves in
the refrigerant circuit so the reclaim of refrigerant or vacuuming
process can be done properly.
To stop the refrigerant recovery/vacuuming
mode, push BS1. If BS1 is not pushed, the
system will remain in refrigerant recovery/
vacuuming mode.
[2‑22]
Deactivated
Automatic low noise setting and level during night time.
(default)
By changing this setting, you activate the automatic low noise
operation function of the unit and define the level of operation.
Depending on the chosen level, the noise level will be lowered.
The start and stop moments for this function are defined under
setting [2‑26] and [2‑27].
Level 1
[2‑25]
Level 1
Low noise operation level via the low noise switch.
Level 2
Level 3<Level 2<Level 1
Level 2
Level 3
Level 3<Level 2<Level 1
(default)
If the system needs to be running under low noise operation
conditions when an external signal is sent to the unit, this setting
defines the level of low noise that will be applied.
Level 3
[2‑26]
20h00
22h00
Low noise operation start time.
(default)
This setting is used in conjunction with setting [2‑22].
24h00
[2‑27]
6h00
Low noise operation stop time.
7h00
This setting is used in conjunction with setting [2‑22].
8h00
(default)
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Commissioning typically consists of the following stages:
1
Checking the "Checklist before commissioning".
2
Performing a test run.
3
If necessary, correcting errors after abnormal completion of the
test run.
Operating the system.
4
8.2
Precautions when commissioning
DANGER: RISK OF ELECTROCUTION
Installer and user reference guide
27
8 Commissioning
DANGER: RISK OF BURNING
Fuses, circuit breakers, or protection devices
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 12. Be sure that neither a fuse nor
a protection device has been bypassed.
CAUTION
Do not perform the test operation while working on the
indoor units.
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.
Internal wiring
Visually check the electrical component box and the
inside of the unit on loose connections or damaged
electrical components.
CAUTION
Pipe size and pipe insulation
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.
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
INFORMATION
Be sure that the stop valves are open on both liquid and
gas side.
Stop valves
Note that during the first running period of the unit,
required power input may be higher. This phenomenon
originates from the compressor that requires a 50 hour run
elapse before reaching smooth operation and stable power
consumption. Reason is that the scroll is made out of iron
and that it takes some time to smooth the surfaces that
make contact.
Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
Refrigerant leak
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.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
Oil leak
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.
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.
8.3
Check that the air inlet and outlet of the unit is not
obstructed by paper sheets, cardboard, or any other
material.
Air inlet/outlet
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.
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.
Installation date and field setting
Installation
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).
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
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 22,
according to the wiring diagrams and according to the
applicable legislation.
8.4
Power supply voltage
8.4.1
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
Make sure to carry out the system test operation after the first
installation.
Earth wiring
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.
Installer and user reference guide
28
Checklist during commissioning
To perform a test run.
About test run
The procedure below describes the test operation of the complete
system.
8.4.2
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 25.
2
Turn ON the power to the outdoor unit and the connected
indoor units.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
9 Hand-over to the user
NOTICE
8.4.4
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
3
Turn ON the operation switch of the outdoor unit.
4
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 20).
b
c
d
9
Operating the unit
Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ 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.
a
O
X
a
b
c
d
5
6
▪ Show the user what to do in relation to maintaining the unit.
Sealing state (= sufficient refrigerant)
Insufficient refrigerant
Sight glass
Full of liquid
A little foam in the liquid
A lot of foam in the liquid
10
Maintenance and service
NOTICE
Check if the indoor unit blows cold air, and the room/showcase
temperature decreases.
Maintenance must be done by an authorised installer or
service agent.
Turn OFF the operation switch of the outdoor unit.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
CAUTION
Do NOT turn OFF power by disconnecting the power
supply directly. Possible consequence:
NOTICE
▪ The auto restart function of the unit might automatically
resume operation after the power supply is
reconnected.
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.
▪ Compressor malfunction.
7
Check the test operation results on the outdoor unit 7‑LEDs
display.
Completion
Description
Normal
completion
Abnormal
completion
8.4.3
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
10.1
Refer to "8.4.3 Correcting after abnormal
completion of the test run" on page 29 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
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ The refrigerant recovery operation
10.2
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
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.
INFORMATION
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
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 31).
Carry out the test operation again and confirm that the abnormality is
properly corrected.
If a malfunction occurs, a signal (220-240 V AC) is given to
the error output (X2M/E1/E2), and the H2P LED on the
main PCB is lit.
Overview: Maintenance and
service
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.
Installer and user reference guide
29
11 Troubleshooting
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
below, with a tester and confirm that the voltage of the capacitor
in the main circuit is less than 50 V DC.
4
Press BS1 to stop vacuuming mode.
10.4.2
To recover refrigerant
This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
NOTICE
Make sure to NOT recover any oil while recovering
refrigerant. Example: By using an oil separator.
A1P
C+
C–
A2P
11
Troubleshooting
11.1
Overview: Troubleshooting
Before troubleshooting
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.)
Junction connectors
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.
X106A for M1F
▪ 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.
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.
DANGER: RISK OF ELECTROCUTION
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
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.
Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
DANGER: RISK OF BURNING
▪ Outdoor unit heat exchanger.
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.
11.3
Solving problems based on error
codes
INFORMATION
10.4
About service mode operation
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to "7.2 Making field settings" on
page 25 for details how to set mode 2.
When vacuuming/recovery mode is used, check very carefully what
should be vacuumed/recovered before starting. See installation
manual of the indoor unit for more information about vacuuming and
recovery.
10.4.1
To use vacuum mode
1
Turn OFF the external operation switch.
2
Activate setting [2‑21] to start vacuuming mode.
Result: When confirmed, the outdoor unit expansion valves will
fully open. At that moment H1P is lit.
3
Evacuate the system with a vacuum pump.
Installer and user reference guide
30
If a malfunction occurs, a signal (220-240 V AC) is given to
the error output (X2M/E1/E2), and the H2P LED on the
main PCB is lit.
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 25). Error codes consist of 2 characters
(example: E3).
After solving the problem, reset the malfunction by turning OFF and
ON the external operation switch, and retry operation.
11.3.1
#
1
To display the error codes of the latest
malfunctions
Action
Display
Start from the default
situation.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
11 Troubleshooting
#
Action
Display
2
Select mode 1.
BS1
[1×]
3
Select a malfunction.
BS2 Possible malfunctions:
[X×]
[1‑14] Latest malfunction:
("X×" depends on the
setting that you want
to select.)
E7
Display the first
character of the error
code.
Cause
Solution
Fan motor malfunction
Check connection on PCB
or actuator.
(M1F) – A2P (X106A)
(M2F) – A2P (X107A)
E9
[1‑15] 2nd last malfunction:
[1‑16] 3rd last malfunction:
4
Code
Electronic expansion valve Check connection on PCB
malfunction
or actuator.
(Y1E) - A1P (X21A)
(Y3E) - A1P (X22A)
F3
BS3 Possible characters:
[1×]
E:
▪ The stop valve of an ▪ Open the stop valve on
outdoor unit is left both the gas and liquid
closed.
side.
▪ Insufficient refrigerant
▪ Check if the additional
refrigerant charge has
been finished correctly.
Recalculate the required
amount of refrigerant and
add an adequate amount
of refrigerant.
F6
Refrigerant overcharge
Recalculate the required
amount of refrigerant and
correct the refrigerant
charge level by recovering
any excessive refrigerant
with a refrigerant recovery
machine.
H9
Ambient temperature
Check connection on PCB
sensor malfunction (R1T) - or actuator.
A1P (X11A)
J3
Discharge temperature
sensor malfunction (R2T):
open circuit / short circuit A1P (X12A)
J5
Suction temperature sensor Check connection on PCB
malfunction
or actuator.
H:
F:
J:
L:
P:
U:
5
Display the second
character of the error
code.
BS2 Possible characters:
[1×]
1:
2:
3:
4:
5:
6:
7:
8:
9:
A:
(R3T) - A1P (X12A)
C:
6
Quit mode 1.
11.3.2
Code
E3
J6
Liquid temperature sensor
(coil) malfunction (R6T) A1P (X13A)
Check connection on PCB
or actuator.
J7
Liquid temperature sensor
(after subcool HE)
malfunction (R7T) - A1P
(X13A)
Check connection on PCB
or actuator.
J9
Gas temperature sensor
(after subcool HE)
malfunction (R4T) - A1P
(X12A)
Check connection on PCB
or actuator.
JA
High pressure sensor
Check connection on PCB
malfunction (S1NPH): open or actuator.
circuit / short circuit - A1P
(X17A)
JC
Low pressure sensor
Check connection on PCB
malfunction (S1NPL): open or actuator.
circuit / short circuit - A1P
(X18A)
L4
▪ Fin temperature rise ▪ Remove obstacles that
because
of
inverter block the passage of air
malfunction.
to the outdoor unit.
Error codes: Overview
Solution
▪ The stop valve of an ▪ Open the stop valve on
outdoor unit is left both the gas and liquid
closed.
side.
▪ Refrigerant overcharge
E4
(R5T) - A1P (X12A)
BS1
[1×]
Cause
▪ Recalculate the required
amount of refrigerant and
correct the refrigerant
charge
level
by
recovering any excessive
refrigerant
with
a
refrigerant
recovery
machine.
▪ The stop valve of an ▪ Open the stop valve on
outdoor unit is left both the gas and liquid
closed.
side.
▪ Insufficient refrigerant
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Check connection on PCB
or actuator.
▪ Check if the additional
refrigerant charge has
been finished correctly.
Recalculate the required
amount of refrigerant and
add an adequate amount
of refrigerant.
▪ Fin temperature rise ▪ Check connection
because of short circuit.
PCB or actuator.
▪ Fin
malfunction.
on
thermistor
Installer and user reference guide
31
12 Disposal
Code
Cause
Solution
LC
Transmission outdoor unit - Check connection.
inverter: INV1 / FAN1
transmission trouble
P1
INV1 unbalanced power
supply voltage
Check if power supply is
within range.
U1
Reversed power supply
phase malfunction
Correct phase order.
U2
Insufficient supply voltage
Check if the supply voltage
is supplied properly.
12
Disposal
Dismantling of the unit, and treatment of the refrigerant, oil and other
parts must comply with the applicable legislation.
Installer and user reference guide
32
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
13 Technical data
13
Technical data
Latest information can be found in the technical engineering data.
13.1
Overview: Technical data
This chapter contains information about:
• Dimensions
• Service space
• Components
• Piping diagram
• Wiring diagram
• Technical specifications
• Capacity table
13.2
Dimensions: Outdoor unit
(dimensions in mm)
620
140
320
350
(345~355)
30
140
j
59
43
30
40
94
900
30
e
d
f
i
55
55
223
430
84
54
423
54
80
67
f
g
h
145
16
70
102
58
117
71
13
19
16
89
24
19
89
142
52
g
95
60
h
g
f
h
148
b
a
95
1345
c
45
a
b
c
d
e
f
g
h
i
j
376
191
f
Gas pipe connection (Ø15.9 flare)
Liquid pipe connection (Ø9.5 flare)
Service port (refrigerant charge) (in the unit)
Service port (high pressure) (in the unit)
Electronic connection and earthing terminal M5 (in the switch box)
Refrigerant piping intake
Power supply wiring intake (knockout hole Ø34)
Transmission wiring intake (knockout hole Ø27)
Drain pipe connection
Anchor point (bolt 4× M12)
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
33
13 Technical data
13.3
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 unit (
) | Single row of units (
)
A~E
eB
E
eD
e
HU
C
c
b
d
D
B
a
HD
HB
e
≥100
b
A,B,C,D
E
a,b,c,d,e
eB
eD
HU
HB,HD
1
2
eB
eD
—
≥100 ≥100 ≥100
B, E
—
≥100
≥1000
≤500
A, B, C, E
—
≥150 ≥150 ≥150
≥1000
≤500
D
—
D, E
—
B, D
—
B, D, E
HB<HD
≥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
A, B, C
—
≥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
34
e
A, B, C
d
HD
d
≥100
B, D, E
D
c
—
A
E
HU
c
b
HB>HU
≥100
C
(mm)
a
B
HB>HD
eB
eD
HB HD HU
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
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+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
35
13 Technical data
13.4
Components: Outdoor unit
a
M1F M2F
b
c
d
A1P
X1M
X2M
e
f
Y3S
g
Y2S
S1PH
k
h
i
j
Y1E
Y3E
M1C
a
b
c
d
e
f
g
h
i
j
k
A1P
M1C
M1F-M2F
S1PH
Fan
Heat exchanger
Subcool heat exchanger
Switch box
Service port (high pressure)
Service port (refrigerant charge)
Oil separator
Cable tie mountings (to fix the field wiring with cable ties to
ensure stress relief)
Stop valve (gas)
Stop valve (liquid)
Accumulator
Printed circuit board (main)
Motor (compressor)
Motor (upper and lower fan)
High pressure switch
Installer and user reference guide
36
X1M
X2M
Y1E
Y3E
Y2S
Y3S
Terminal strip (power supply wiring)
Terminal strip (operation switch, low-noise switch and error
output)
Electronic expansion valve (main)
Electronic expansion valve (subcool heat exchanger)
Solenoid valve (unloader circuit)
Solenoid valve (hot gas)
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
13 Technical data
13.5
Piping diagram: Outdoor unit
Y3E
e
Y1E
d
R8T
R7T
g
R1T
R6T
f
R4T
M1F
d
M2F
R3T
h
S1NPL
Y1S
S1NPH
R5T
Y2S
j
j
b
c
d
d
c
k
R2T
M1C
S1PH
a
i
d
j
Y3S
l
a
b
c
d
e
f
g
h
i
j
k
l
M1C
M1F-M2F
R1T
R2T
R3T
R4T
R5T
R6T
R7T
R8T
S1NPH
S1NPL
S1PH
Y1E
Y3E
Y1S
Y2S
Y3S
Field piping (liquid: Ø9.5 flare connection)
Field piping (gas: Ø15.9 flare connection)
Stop valve (with service port 5/16")
Filter (5×)
Subcool heat exchanger
Pressure regulating valve
Heat exchanger
Service port (high pressure)
Oil separator
Capillary tube (3×)
Service port (refrigerant charge)
Accumulator
Compressor
Fan motor
Thermistor (air)
Thermistor (discharge)
Thermistor (suction 1)
Thermistor (subcool heat exchanger)
Thermistor (suction 2)
Thermistor (heat exchanger)
Thermistor (liquid pipe 1)
Thermistor (liquid pipe 2)
High pressure sensor
Low pressure sensor
High pressure switch
Electronic expansion valve (main)
Electronic expansion valve (subcool heat exchanger)
4‑way valve
Solenoid valve (hot gas)
Solenoid valve (unloader circuit)
Cooling
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
37
13 Technical data
13.6
Wiring diagram: Outdoor unit
The wiring diagram is delivered with the unit, located at the inside of
the service cover.
3N~ 380-415 V
50 Hz
N
L3
L2
L1
Q1DI
X1M L1 L2 L3 N
GRN
/YLW
RED WHT BLK
L3A
NA
H1P
E
Z1F
R9T
R1
N2
+ C2
X32A
X104A
PS
K6R
+
+ C3
R2
W
V
X111A U
X102A
V
W
A2P
Wire entrance
Z4C
N=6
3+4 HP
DS1
1 2
RED WHT BLK
U V W
MS
3~ M1C
K4R
K3R
R4T
R5T
R6T
R7T
R8T
t°
t°
t°
t°
t°
t°
t°
t°
1
X12A
1
S1NPL
X18A
X21A
X13A
X22A
6
Y1E
6
Y3E
M
M
X25A
A
B
C
E1
E2
X2M
A1P
X107A
A2P
A
X506A
X507A
X516A
X517A OFF: Normal mode
M1F MS
3~
R3T
F5U
X106A
Z3C
N=5
Y3S
S1NPH
X17A
E1HC
R2T
1
X50A
HAP
V3R
V1R
t°
ON
OFF
X28A
R1T
X11A
-
+
X108A
Y2S
P>
-
+ C1
P4
BRN
Position of
compressor terminal U
WHT
P2
P3
ORG
X109A
L3B
N1
-
BLK +
S1PH
X4A
X8A
Z2C
RED
L2B
X9A
WHT
BLK
X27A
BLK
L31A
X26A
F3U
WHT
L21A
RED WHT
Z1C
N=5
P1
L1R
F4U
K5R
V2R L1B
H8P
H7P
L1R
K1M
K2R
HAP
R1
L11A
H6P
H5P
F1U
Z2F
A1P
H3P
BS1 BS2 BS3 BS4 BS5
BLU
L2A
H2P H4P
GRN
K1R
L1A
BLU
M2F
MS
3~
Note 7
ON: Low noise mode
Note 7
Note 8
OFF: Unit operation OFF Error output
ON: Unit operation ON
X1M
X2M
View A
Electronic components
assembly front
2D103125-1
Notes:
GRN
Green
1
This wiring diagram applies only to the outdoor unit.
ORG
Orange
2
Symbols (see below).
RED
Red
3
Symbols (see below).
WHT
White
4
Refer to the installation manual or service manual on how to
use BS1~BS5 push button switch and DS1‑1, DS1‑2 DIP
switch.
YLW
Yellow
Legend for wiring diagram LRMEQ3+4:
5
Do not operate the unit by short-circuiting protection device
S1PH.
A1P
Printed circuit board (main)
A2P
Printed circuit board (inverter)
6
Colours (see below).
BS1~BS5
7
Use a voltage-free contact for microcurrent (≤1 mA, 12 V DC).
Push button switch (MODE, SET, RETURN, TEST,
RESET)
8
Error output is 220-240 V AC, with a maximum load of 0.5 A.
C1~C3
Capacitor
DS1
DIP switch
E1HC
Crankcase heater
Fuse (T 6.3 A / 250 V)
Symbols:
L
Live
N
Neutral
F1U~F4U
(A1P)
Field wiring
F5U
Fuse (F 1.0 A / 250 V)
Terminal strip
H1P~H8P
Light‑emitting diode (service monitor is orange)
Connector
H2P:
Fixed connector
▪ Prepare, test: Flickering
Movable connector
Protective earth (screw)
Light-emitting diode (service monitor is green)
Noiseless earth
HAP (A2P)
Light-emitting diode (service monitor is green)
Terminal
K1M (A1P)
Magnetic contactor
K1R
Magnetic relay (Y1S)
K2R
Magnetic relay (Y2S)
K3R
Magnetic relay (Y3S)
K4R
Magnetic relay (E1HC)
Colours:
BLK
Black
BLU
Blue
BRN
Brown
Installer and user reference guide
38
▪ Malfunction detection: Light up
HAP (A1P)
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
13 Technical data
K5R, K6R
Magnetic relay
L1R
Reactor
M1C
Motor (compressor)
M1F
Motor (fan) (upper)
M2F
Motor (fan) (lower)
PS
Switching power supply
Q1DI
Earth leakage circuit breaker (300 mA)
R1 (A1P)
Resistor
R1 (A2P),
R2 (A2P)
Resistor
R1T
Thermistor (air)
R2T
Thermistor (M1C discharge)
R3T
Thermistor (suction 1)
R4T
Thermistor (subcool)
R5T
Thermistor (suction 2)
R6T
Thermistor (heat exchanger)
R7T
Thermistor (liquid 1)
R8T
Thermistor (liquid 2)
R9T
Thermistor (power module)
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
S1PH
Pressure switch (high)
V1R
Power module
V2R, V3R
Diode module
X1M
Terminal strip (power supply)
X2M
Terminal strip
Y1E
Electronic expansion valve (main)
Y3E
Electronic expansion valve (subcool)
Y2S
Solenoid valve (hot gas)
Y3S
Solenoid valve (unloader circuit)
Z1C~Z4C
Noise filter (ferrite core)
Z1F
Noise filter (with surge absorber)
Z2F
Noise filter
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
39
13 Technical data
13.7
Technical specifications: Outdoor unit
Technical specifications
Specification
LRMEQ3
Casing material
LRMEQ4
Painted galvanised steel
Dimensions h×w×d
1345×900×320 mm
Weight
104 kg
Operation range
▪ Evaporating temperature
–10~2°C
▪ Outdoor temperature
–10~43°C DB
Capacity(a)
▪ Refrigerating capacity (medium temperature)
5.90 kW
8.40 kW
▪ COP
▪ Power input
PED
▪ Category
1
▪ Most critical part
▪ PS×V
Compressor
167 bar×l
Maximum number of indoor units connected
4
Heat exchanger
▪ Type
Cross fin
▪ Treatment
Anti corrosion
Fan
▪ Type
Propeller
▪ Quantity
2
▪ Air flow rate(b)
106 m³/min
▪ Motor
2
▪ Model
Direct drive
▪ Output/pcs
70 W
Compressor
▪ Quantity
1
▪ Model
Inverter
▪ Type
Hermetically sealed scroll compressor
Sound level (nominal)(c)
▪ Sound power(d)
67 dBA
▪ Sound pressure(e)
51 dBA
Refrigerant
▪ Type
R410A
▪ Charge
4.0 kg
Refrigerant oil
FVC68D
Safety devices
High pressure switch
Fan driver overload protector
Inverter overload protector
PCB fuse
(a)
(b)
(c)
(d)
(e)
Nominal capacities are based on evaporating temperature –10°C, outdoor temperature 32°C DB, and suction superheat 10°C.
Nominal at 230 V.
Sound values are measured in a semi-anechoic room.
Sound power level is an absolute value that a sound generates.
Sound pressure level is a relative value depending on the distance and acoustic environment. For more details, refer to sound level drawings in
the technical data book.
Installer and user reference guide
40
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
14 About the system
Electrical specifications
Specification
LRMEQ3
LRMEQ4
Power supply
▪ Name
Y1
▪ Phase
3N~
▪ Frequency
50 Hz
▪ Voltage
380-415 V
Current
▪ Nominal running current (RLA)(a)
▪ Starting current (MSC)(b)
▪ Minimum circuit amps (MCA)
≤MCA
≤MCA
(c)
13.5 A
▪ Maximum fuse amps (MFA)(d)
16 A
▪ Full load amps (FLA)(e)
0.3+0.3 A
Voltage range
380-415 V +/– 10%
Wiring connections
▪ For power supply
(a)
(b)
(c)
(d)
(e)
5G
RLA is based on evaporating temperature –10°C, outdoor temperature 32°C DB, and suction superheat 10°C.
MSC=the maximum current during startup of the compressor. ZEAS uses only inverter compressors. MCA must be used to select the correct field
wiring size. The MCA can be regarded as the maximum running current.
MCA must be used to select the correct field wiring size. The MCA can be regarded as the maximum running current.
MFA is used to select the circuit breaker and the ground fault circuit interrupter (earth leakage circuit breaker).
FLA=nominal running current fan. Voltage range: units are suitable for use on electrical systems where voltage supplied to unit terminal is not
below or above listed range limits. Maximum allowable voltage range variation between phases is 2%.
For the user
14
CAUTION
About the system
It is not good for your health to expose your body to the air
flow for a long time.
NOTICE
For future modifications or expansions of your system:
CAUTION
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.
14.1
a
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
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.
System layout
b
c
a
b
c
d
d
Outdoor unit (ZEAS condensing unit)
Refrigerant piping
Indoor unit (Blower coil)
Indoor unit (Showcase)
16
Operation
16.1
Operation range
Use the system in the following temperature ranges for safe and
effective operation.
Cooling
Outdoor temperature
Evaporating temperature
15
Before operation
–10~43°C DB
–10~2°C
16.2
Operating the system
This unit contains electrical and hot parts.
16.2.1
About operating the system
WARNING
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
41
17 Energy saving and optimum operation
▪ To start and stop operation of the outdoor unit, use the external
operation switch.
NOTICE
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
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.
17
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
Energy saving and optimum
operation
Please contact your installer for more information.
▪ 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.
18
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.
Maintenance and service
Turn off any combustible heating devices, ventilate the
room and contact the dealer where you purchased the unit.
NOTICE
Do not use the system until a service person confirms that
the portion where the refrigerant leaks is repaired.
Never inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
WARNING
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.
CAUTION
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.
18.3
After-sales service and warranty
18.3.1
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
CAUTION
Pay attention to the fan.
It is dangerous to inspect the unit while the fan is running.
Be sure to turn off the main switch before executing any
maintenance task.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
18.1
Maintenance after a long stop
period
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).
E.g., at the beginning of the season.
▪ The installation date.
▪ Check and remove everything that might be blocking inlet and
outlet vents of the outdoor unit.
▪ The symptoms or malfunction, and details of the defect.
▪ Turn on the power at least 6 hours before operating the unit in
order to ensure smoother operation.
18.2
About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R410A
Global warming potential (GWP) value: 2087.5
Installer and user reference guide
42
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
19 Troubleshooting
19
Malfunction
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.
The system operates
but cooling is
insufficient.
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
Measure
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacle and make it wellventilated.
▪ Check if the indoor unit is not frosted up.
Defrost the unit manually, or shorten the
defrost operation cycle.
WARNING
▪ Check if there are not too many articles
inside the room/showcase. Remove a
couple of articles.
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.
▪ Check if there is smooth air circulation
inside the room/showcase. Reorganise
the articles inside the room/showcase.
The system must be repaired by a qualified service person:
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.
▪ 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.
If water leaks from the unit.
Stop the operation.
The operation switch does not work
well.
Turn off the power.
▪ Check if there is cold air leaking outside
of the room/showcase. Stop the air from
leaking outside.
Malfunction
Measure
▪ Check if you did not set the indoor unit
setpoint temperature too high. Set the
setpoint appropriately.
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
the power supply is recovered.
▪ Check if no fuse has blown or breaker
has worked. Change the fuse or reset the
breaker if necessary.
The system stops
immediately after
starting operation.
▪ Check if there are no high-temperature
articles stored in the room/showcase.
Always store articles after they have
cooled down.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacle and make it wellventilated.
▪ Check if the door is not opened too long.
Reduce the opening time of the door.
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).
19.1
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
This is to prevent components from being damaged. The unit will
stop in a little while.
19.1.3
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
43
20 Relocation
▪ 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
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.
19.1.6
Symptom: The inside of an outdoor unit is
warm even when the unit has stopped
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
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. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
22
Glossary
Dealer
Sales distributor for the product.
Authorized installer
Technical skilled person who is qualified to install 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.
Operation manual
Instruction manual specified for a certain product or
application, explaining how to operate it.
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.
Installer and user reference guide
44
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
4P442131-1 2016.03
Copyright 2016 Daikin
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