Daikin LRMEQ3AY1, LRMEQ4AY1 Installer reference guide
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 3
1.1 About the documentation .......................................................... 3
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the user ............................................................................... 3
1.3 For the installer.......................................................................... 4
1.3.1 General ....................................................................... 4
1.3.2 Installation site ............................................................ 4
1.3.3 Refrigerant .................................................................. 4
1.3.4 Brine............................................................................ 5
1.3.5 Water .......................................................................... 5
1.3.6 Electrical ..................................................................... 5
2 About the documentation 6
2.1 About this document.................................................................. 6
For the installer 6
3 About the box 6
3.1 Overview: About the box ........................................................... 6
3.2 Outdoor unit............................................................................... 7
3.2.1 To unpack the outdoor unit ......................................... 7
3.2.2 To handle the outdoor unit.......................................... 7
3.2.3 To remove the accessories from the outdoor unit....... 7
4 About the units 7
4.1 Overview: About the units ......................................................... 7
4.2 Identification .............................................................................. 7
4.2.1 Identification label: Outdoor unit ................................. 8
4.3 About the outdoor unit ............................................................... 8
4.4 System layout............................................................................ 8
4.5 About the indoor units ............................................................... 8
4.5.1 About reusing existing indoor heat exchangers.......... 8
5 Preparation 8
5.1 Overview: Preparation............................................................... 8
5.2 Preparing installation site .......................................................... 8
5.2.1 Installation site requirements of the outdoor unit ........ 9
5.2.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 10
5.2.3 Securing safety against refrigerant leaks.................... 10
5.3 Preparing refrigerant piping....................................................... 11
5.3.1 About reusing existing piping...................................... 11
5.3.2 Refrigerant piping requirements.................................. 11
5.3.3 Refrigerant piping material.......................................... 11
5.3.4 To select the piping size ............................................. 11
5.3.5 Refrigerant piping length and height difference .......... 12
5.4 Preparing electrical wiring ......................................................... 12
5.4.1 Safety device requirements ........................................ 12
6 Installation 13
6.1 Overview: Installation ................................................................ 13
6.2 Opening the units ...................................................................... 13
6.2.1 About opening the units .............................................. 13
6.2.2 To open the outdoor unit............................................. 13
6.3 Mounting the outdoor unit.......................................................... 13
6.3.1 About mounting the outdoor unit................................. 13
6.3.2 Precautions when mounting the outdoor unit.............. 13
6.3.3 To provide the installation structure............................ 13
6.3.4 To install the outdoor unit............................................ 14
6.3.5 To prevent the outdoor unit from falling over .............. 14
6.4 Connecting the refrigerant piping .............................................. 14
6.4.1 About connecting the refrigerant piping ...................... 14
6.4.2 Precautions when connecting the refrigerant piping... 14
6.4.3 Guidelines when connecting the refrigerant piping..... 14
6.4.4 Pipe bending guidelines.............................................. 15
6.4.5 To flare the pipe end .................................................... 15
6.4.6 To braze the pipe end .................................................. 15
6.4.7 Using the stop valve and service port .......................... 15
6.4.8 Guidelines when installing a sight glass ...................... 16
6.4.9 Guidelines when installing a dryer ............................... 17
6.4.10 To connect the refrigerant piping to the outdoor unit ... 17
6.4.11 Guidelines when connecting piping branching............. 17
6.5 Checking the refrigerant piping .................................................. 18
6.5.1 About checking the refrigerant piping .......................... 18
6.5.2 Checking refrigerant piping: General guidelines.......... 18
6.5.3 Checking refrigerant piping: Setup............................... 18
6.5.4 To perform a leak test .................................................. 18
6.5.5 To perform vacuum drying ........................................... 19
6.6 To insulate the refrigerant piping................................................ 19
6.7 Charging refrigerant ................................................................... 19
6.7.1 About charging refrigerant ........................................... 19
6.7.2 Precautions when charging refrigerant ........................ 19
6.7.3 To determine the additional refrigerant amount........... 20
6.7.4 To charge refrigerant ................................................... 20
6.7.5 Error codes when charging refrigerant......................... 21
6.7.6 To fix the fluorinated greenhouse gases label ............. 21
6.8 Connecting the electrical wiring.................................................. 22
6.8.1 About connecting the electrical wiring.......................... 22
6.8.2 Precautions when connecting electrical wiring ............ 22
6.8.3 Guidelines when knocking out knockout holes ............ 23
6.8.4 Guidelines when connecting the electrical wiring ........ 23
6.8.5 To connect the electrical wiring on the outdoor unit..... 23
6.9 Finishing the outdoor unit installation ......................................... 24
6.9.1 To close the outdoor unit ............................................. 24
7 Configuration 25
7.1 Overview: Configuration ............................................................. 25
7.2 Making field settings................................................................... 25
7.2.1 About making field settings .......................................... 25
7.2.2 To access the field setting components....................... 25
7.2.3 Field setting components ............................................. 25
7.2.4 To access mode 1 or 2 ................................................ 25
7.2.5 To use mode 1 ............................................................. 26
7.2.6 To use mode 2 ............................................................. 26
7.2.7 Mode 1 (and default situation): Monitoring settings ..... 26
7.2.8 Mode 2: Field settings.................................................. 27
8 Commissioning 27
8.1 Overview: Commissioning.......................................................... 27
8.2 Precautions when commissioning .............................................. 27
8.3 Checklist before commissioning................................................. 28
8.4 Checklist during commissioning ................................................. 28
8.4.1 About test run............................................................... 28
8.4.2 To perform a test run (7-LEDs display)........................ 28
8.4.3 Correcting after abnormal completion of the test run... 29
8.4.4 Operating the unit ........................................................ 29
9 Hand-over to the user 29
10 Maintenance and service 29
10.1 Overview: Maintenance and service .......................................... 29
10.2 Maintenance safety precautions................................................. 29
10.2.1 To prevent electrical hazards ....................................... 29
10.3 Checklist for yearly maintenance of the outdoor unit ................. 30
10.4 About service mode operation.................................................... 30
10.4.1 To use vacuum mode .................................................. 30
10.4.2 To recover refrigerant .................................................. 30
11 Troubleshooting 30
11.1 Overview: Troubleshooting......................................................... 30
11.2 Precautions when troubleshooting ............................................. 30
11.3 Solving problems based on error codes ..................................... 30
11.3.1 To display the error codes of the latest malfunctions... 30
11.3.2 Error codes: Overview ................................................. 31
12 Disposal 32
Installer and user reference guide
2
Air-cooled refrigeration condensing unit
LRMEQ3+4AY1
4P442131-1 – 2016.03
1 General safety precautions
13 Technical data 33
13.1 Overview: Technical data .......................................................... 33
13.2 Dimensions: Outdoor unit .......................................................... 33
13.3 Service space: Outdoor unit ...................................................... 34
13.4 Components: Outdoor unit ........................................................ 36
13.5 Piping diagram: Outdoor unit..................................................... 37
13.6 Wiring diagram: Outdoor unit .................................................... 38
13.7 Technical specifications: Outdoor unit....................................... 40
For the user 41
14 About the system 41
14.1 System layout ............................................................................ 41
15 Before operation 41
16 Operation 41
16.1 Operation range ........................................................................ 41
16.2 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 Maintenance after a long stop period ........................................ 42
18.2 About the refrigerant.................................................................. 42
18.3 After-sales service and warranty ............................................... 42
18.3.1 Warranty period .......................................................... 42
18.3.2 Recommended maintenance and inspection .............. 42
19 Troubleshooting 43
19.1 Symptoms that are NOT system malfunctions .......................... 43
19.1.1 Symptom: The system does not operate .................... 43
19.1.2 Symptom: The unit does not stop immediately when
operation is stopped.................................................... 43
19.1.3 Symptom: Noise (Outdoor unit) .................................. 43
19.1.4 Symptom: Dust comes out of the unit ......................... 44
19.1.5 Symptom: The outdoor unit fan does not spin ............ 44
19.1.6 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped ................................. 44
20 Relocation 44
21 Disposal 44
22 Glossary 44
1 General safety precautions
DANGER: RISK OF BURNING
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.
CAUTION
Indicates a situation that could result in minor or moderate
injury.
NOTICE
Indicates a situation that could result in equipment or
property damage.
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.
▪ 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:
1.1 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
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
This means that electrical and electronic products may not be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
Installer and user reference guide
3
1 General safety precautions
▪ Batteries are marked with the following symbol:
This means that the batteries may not be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility
for reuse. By ensuring waste batteries are disposed of correctly,
you will help to prevent potential negative consequences for the
environment and human health.
1.3 For the installer
1.3.1 General
If you are not sure how to install or operate the unit, contact your
dealer.
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.
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 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
Air-cooled refrigeration condensing unit
LRMEQ3+4AY1
4P442131-1 – 2016.03
1 General safety precautions
WARNING
Always recover the refrigerant. Do NOT release them
directly into the environment. Use a vacuum pump to
evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
NOTICE
▪ To avoid compressor breakdown, do NOT charge more
than the specified amount of refrigerant.
▪ When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing the leak test and the
vacuum drying.
▪ In case re-charge is required, refer to the nameplate of the unit. It
states the type of refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe
sizes and pipe lengths some systems require additional charging
of refrigerant.
▪ Only use tools exclusively for the refrigerant type used in the
system, this to ensure pressure resistance and prevent foreign
materials from entering into the system.
▪ Charge the liquid refrigerant as follows:
If Then
A siphon tube is present
(i.e., the cylinder is marked with
"Liquid filling siphon attached")
A siphon tube is NOT present Charge with the cylinder upside
Charge with the cylinder upright.
down.
WARNING
Take sufficient precautions in case of brine leakage. If
brine leaks, ventilate the area immediately and contact
your local dealer.
WARNING
The ambient temperature inside the unit can get much
higher than that of the room, e.g. 70°C. In case of a brine
leak, hot parts inside the unit can create a hazardous
situation.
WARNING
The use and installation of the application MUST comply
with the safety and environmental precautions specified in
the applicable legislation.
1.3.5 Water
If applicable. See the installation manual or installer reference guide
of your application for more information.
NOTICE
Make sure water quality complies with EU directive
98/83EC.
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 1minute,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
▪ Open refrigerant cylinders slowly.
▪ 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.
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
5
2 About the documentation
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
NOTICE
Precautions when laying power wiring:
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
▪ 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 1metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1metre 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
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.
2 About the documentation
2.1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪ General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the box of the outdoor unit)
▪ Outdoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪ Installer and user reference guide:
▪ Preparation of the installation, technical specifications,
reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/support-
and-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
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
It contains information about:
▪ Unpacking and handling the units
▪ Removing the accessories from the units
Keep the following in mind:
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
▪ At delivery, the unit must be checked for damage. Any damage
21
a
1×
b
1×
c
1×
d
1×
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
4 About the units
3.2.3 To remove the accessories from the outdoor unit
1 Remove the service cover. See "6.2.2 To open the outdoor
unit"on page13.
2 Remove the accessories.
3.2.2 To handle the outdoor unit
Carry the unit slowly as shown:
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.
a General safety precautions
b Outdoor unit installation and operation manual
c Fluorinated greenhouse gases label
d 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.
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
7
5 Preparation
cb da
4.2.1 Identification label: Outdoor unit
Location
Model identification
Example: LR ME Q 4 A Y1 [*]
Code Explanation
LR ZEAS condensing unit
ME Medium temperature refrigeration
Q Refrigerant R410A
3+4 Capacity class
A Model series
Y1 Power supply
[*] Minor model change indication
4.3 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
Capacity (cooling) 5.90~8.40kW
Ambient design temperature (cooling) –10~43°CDB
4.4 System layout
▪ Solenoid valve. Install an R410A solenoid valve (with an
operating differential pressure of 3.5MPa [35bar] 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.
▪ Defrosting type. Use either off-cycle defrosting or electric heater
defrosting models. Do NOT use hot-gas defrosting models.
4.5.1 About reusing existing indoor heat exchangers
In some cases you may reuse existing indoor heat exchangers, in
other cases not.
Reuse not allowed
You may not reuse existing indoor heat exchangers in the following
cases:
▪ When the design pressure is insufficient. (minimum design
pressure = 2.5MPa [25bar])
▪ 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 ≤30mg/10m.
Reuse allowed
In other cases than above, you may reuse existing indoor heat
exchangers. However, if the old condensing unit did NOT use the
same refrigerant (R410A) and the same oil (FVC68D) as the new
one, you must clean the heat exchanger tubes to remove any
residue.
If the old condensing unit did NOT use the same refrigerant (R410A)
as the new one, make sure the mechanical thermostatic expansion
valve is compatible with R410A.
a Outdoor unit (ZEAS condensing unit)
b Refrigerant piping
c Indoor unit (Blower coil)
d Indoor unit (Showcase)
4.5 About the indoor units
NOTICE
To be sure your system setup (outdoor unit+indoor unit(s))
will work, you have to consult the latest technical
engineering data for ZEAS condensing unit.
The ZEAS condensing unit can be combined with several types of
third party indoor units and is intended for R410A use only.
When installing indoor units, mind the following:
▪ Expansion valve. Install an R410A mechanical thermostatic
expansion valve on each indoor unit. Insulate the feeler block of
the mechanical thermostatic expansion valve.
Installer and user reference guide
8
5 Preparation
5.1 Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
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
≥1500
≥1500
≥1500
≥1500
(mm)
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c
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a
b
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d
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d
5.2.1 Installation site requirements of the outdoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Service space requirements. See the "Technical data"
chapter.
▪ Refrigerant piping requirements (length, height
difference). See further in this "Preparation" chapter.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
NOTICE
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.
NOTICE
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.
Do NOT install the unit in the following places:
▪ 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.
▪ 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.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
Seaside installation. Make sure the outdoor unit is NOT directly
exposed to sea winds. This is to prevent corrosion caused by high
levels of salt in the air, which might shorten the life of the unit.
Install the outdoor unit away from direct sea winds.
Example: Behind the building.
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.
a Earth leakage protector
b Fuse
c Indoor unit (Showcase)
d Personal computer or radio
e Indoor unit (Blower coil)
f User interface
g 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.
▪ 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
a Sea wind
b Building
c Outdoor unit
d 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.
Installer and user reference guide
9
5 Preparation
a
a
a
b
a
b
c
c
d
a b
a Make sure there is enough installation space
Set the air outlet side at a right angle to the direction of the wind.
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 1m3 volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
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 Prevailing wind direction
b Air outlet
5.2.2 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.
a Direction of the refrigerant flow
b Room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
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 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
NOTICE
Where a single refrigerant facility is divided into 2 entirely
independent refrigerant systems, use the amount of
refrigerant with which each separate system is charged.
2 Calculate the 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.
a Snow cover or shed
b Pedestal (minimum height = 150mm)
c Prevailing wind direction
d Air outlet
5.2.3 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
D Where there are no smaller room divisions:
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
5 Preparation
a b
t
Ø
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.
a Opening between the rooms
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 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)
4 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
In some cases you may reuse existing piping, in other cases not.
Reuse not allowed
You may not reuse existing piping in the following cases:
▪ When the compressor in the old installation had problems
(example: breakdown). Possible consequence: oxidised coolant
oil, scale residue and other adverse effects.
▪ When the indoor and outdoor units were disconnected from the
piping for a long time. Possible consequence: water and dirt in
the piping.
▪ When the copper piping is corroded.
Reuse allowed
In other cases than above, you may reuse existing piping but keep
the following in mind:
Item Description
Piping diameter Must comply with requirements. See
Piping material
Piping length and
height difference
Piping insulation If deteriorated, must be replaced.
"5.3.2Refrigerant piping requirements"on
page11.
Must comply with requirements. See
"6.6To insulate the refrigerant piping"on
page19.
Item Description
Flare connections May not be reused. Make new ones to
prevent leaks. See "6.4.3Guidelines when
connecting the refrigerant piping"on
page14 and "6.4.5To flare the pipe
end"on page15.
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.
5.3.2 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
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.
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.
5.3.3 Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter
(Ø)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
15.9mm (5/8") Annealed (O) ≥0.99mm
(a) Depending on the applicable legislation and the unit's
▪ Flare connections: Only use annealed material.
Temper grade Thickness (t)
Annealed (O) ≥0.80mm
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
(a)
5.3.4 To select the piping size
Determine the proper size referring to following tables and reference
figure (only for indication).
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
11
5 Preparation
F
A
1
2 3 3
d1
e
B
d2
C
c
D1
E
f
D2
ba
H
2
Requirement Limit
Maximum actual piping length
▪ Example: a+b+c+d2≤Limit
Maximum total piping length
▪ Example: a+b+c+d1+d2+e+f≤Limit
Maximum length first branch kit-indoor
unit
▪ Example: b+c+d2≤Limit
1 Outdoor unit
2 Indoor unit (Showcase)
3 Indoor unit (Blower coil)
A~F Liquid piping
a~f Gas piping
H Height difference outdoor-indoor
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "6.7.3 To determine the additional refrigerant
amount"on page20.
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
Maximum height
difference outdoorindoor
Maximum height difference indoor-indoor 0m
(a) A combination of showcases and blower coils is allowed if
5.4 Preparing electrical wiring
5.4.1 Safety device requirements
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
LRMEQ3+4 13.5A 16A 3N~ 50Hz
Outdoor higher than
indoor
▪ Example: H≤Limit
Outdoor lower than
indoor
they are installed on the same floor.
Recommended
ampacity
fuses
B+C/b+c: Piping between piping branching
Use diameters depending on the total capacity of the indoor units
connected downstream.
Capacity Piping outer
diameter
Liquid piping <4.0kW Ø6.4mm
4.0≤x<8.4kW Ø9.5mm
Gas piping <1.0kW Ø9.5mm
1.0≤x<6.0kW Ø12.7mm
6.0≤x<8.4kW Ø15.9mm
D~F/d~f: Piping between piping branching and indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units.
NOTICE
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.
5.3.5 Refrigerant piping length and height difference
The piping lengths and height differences must comply with the
following requirements.
(see example in "5.3.4To select the piping size"on page11)
Operation switch, low-noise switch and error output wiring
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 (≤1mA, 12VDC).
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 (≤1mA, 12VDC).
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 VAC) is given to the error output (X2M/E1/E2).
Use an alarm with a maximum load of 0.5A.
Wiring Sheathed + shielded cable (2
Vinyl cords
0.75~1.25mm²
Maximum wiring length 130m
30m
30m
10m
5m
0m
(a)
Power supply
380-415V
wires)
Installer and user reference guide
12
Air-cooled refrigeration condensing unit
LRMEQ3+4AY1
4P442131-1 – 2016.03
6 Installation
1×
1
2
(mm)
>150
620
350
(345-355)
4× M12
a
20
6 Installation
6.1 Overview: Installation
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.
▪ Charging refrigerant.
▪ Connecting the electrical wiring.
▪ Finishing the outdoor installation.
▪ Finishing the indoor installation.
INFORMATION
For installation of the indoor unit (mounting the indoor unit,
connecting the refrigerant piping to the indoor unit,
connecting the electrical wiring to the indoor unit …), see
the installation manual of the indoor unit.
6.2 Opening the units
6.2.1 About opening the units
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
6.3 Mounting the outdoor unit
6.3.1 About mounting the outdoor unit
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
1 Providing the installation structure.
2 Installing the outdoor unit.
3 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
"5Preparation"on page8.
6.3.2 Precautions when mounting the outdoor unit
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ 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.
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:
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
6.2.2 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
a Make sure not to cover the drain holes.
INFORMATION
The recommended height of the upper protruding part of
the bolts is 20mm.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Installer and user reference guide
13
6 Installation
a
4× M12
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.
6.3.4 To install the outdoor unit
6.3.5 To prevent the outdoor unit from falling over
In case the unit is installed in places where strong wind can tilt the
unit, take following measure:
1 Prepare 2 cables as indicated in the following illustration (field
supply).
2 Place the 2 cables over the outdoor unit.
3 Insert a rubber sheet between the cables and the outdoor unit
to prevent the cable from scratching the paint (field supply).
4 Attach the cable’s ends. Tighten those ends.
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
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
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).
▪ Only use R410A when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that
are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials
(e.g. mineral oils and moisture) from mixing into the
system.
▪ 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).
6.4 Connecting the refrigerant piping
6.4.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor units are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ 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)
▪ Insulating the refrigerant piping
Installer and user reference guide
14
Unit Installation period Protection method
Outdoor unit >1month Pinch the pipe
<1month Pinch or tape the pipe
Indoor unit Regardless of the
period
INFORMATION
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.
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.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
6 Installation
a
b
c
d
R=0.4~0.8
45°
±2
90°
±2
A
a b
A
a b
c
1
1
≤Ø25.4
a b c d e
f
f
c
d
a
b
▪ 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 Torque wrench
b Spanner
c Piping union
d Flare nut
Piping size
(mm)
Tightening
torque (N•m)
Flare
dimensions (A)
Flare shape
(mm)
(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 Pipe bending guidelines
Use a pipe bender for bending. All pipe bends should be as gentle
as possible (bending radius should be 30~40mm or larger).
a Flare’s inner surface must be flawless.
b The pipe end must be evenly flared in a perfect circle.
c Make sure the flare nut is fitted.
6.4.6 To braze the pipe end
NOTICE
Precautions when connecting field piping. Add brazing
material as shown in the figure.
▪ 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 20kPa (just enough so it can be felt
on the skin) with a pressure-reducing valve.
6.4.5 To flare the pipe end
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 Cut exactly at right angles.
b Remove burrs.
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.
Flare tool for
R410A (clutch
type)
A 0~0.5mm 1.0~1.5mm 1.5~2.0mm
5 Check that the flaring is properly made.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
Conventional flare tool
Clutch type
(Ridgid-type)
a Refrigerant piping
b Part to be brazed
c Taping
d Manual valve
e Pressure-reducing valve
f 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 Using the stop valve and service port
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The figure below shows the name of each part required in
handling the stop valve.
▪ The stop valve is factory closed.
Wing nut type
(Imperial-type)
a Service port and service port cover
b Stop valve
c Field piping connection
d Stop valve cover
Installer and user reference guide
15
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