13.1.4 Symptom: Dust comes out of the unit.......................... 30
13.1.5 Symptom: The outdoor unit fan does not spin ............. 30
14 Relocation30
15 Disposal30
1About the documentation
1.1About 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.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
Installation and operation manual
5
2 About the box
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b
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c
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d
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(10.1 N·m)
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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)
For the installer
2About the box
2.1Outdoor unit
▪ Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ 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.
Technical engineering data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
extranet (authentication required).
2.1.1To remove the accessories from the
outdoor unit
1 Remove the service cover. See "5.1.1 To open the outdoor
unit"on page9.
2 Remove the accessories.
a General safety precautions
b Outdoor unit installation and operation manual
c Fluorinated greenhouse gases label
d Multilingual fluorinated greenhouse gases label
e Gas piping accessory 1 (Ø15.9mm to 19.1mm)
f Gas piping accessory 2 (Ø19.1mm)
g Gas piping accessory 3 (Ø19.1mm)
2.1.2To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The compressor transportation stay must be removed. It is installed
under the compressor leg in order to protect the unit during
transport. Proceed as shown in the figure and procedure below.
1 Slightly loosen the compressor mounting bolt (a).
2 Remove the transportation stay (b).
3 Tighten the compressor mounting bolt (a) to 10.1N•m.
3About the units
3.1About 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.
SpecificationLRMEQ3LRMEQ4
Capacity (cooling)
Ambient design temperature
(cooling)
3.2System layout
(a)
(a) Capacity measured at the following conditions: ambient
temperature 32°C, evaporating temperature –10°C,
superheat 10K.
5.90kW8.40kW
–20~43°CDB
Installation and operation manual
6
a Outdoor unit (ZEAS condensing unit)
Air-cooled refrigeration condensing unit
LRMEQ3+4BY1
4P495373-1 – 2017.07
4 Preparation
b Refrigerant piping
c Indoor unit (Blower coil)
d Indoor unit (Showcase)
3.3About the indoor units
NOTICE
To be sure your system setup (outdoor unit+indoor unit(s))
will work, you have to consult the latest technical
engineering data for ZEAS condensing unit.
The ZEAS condensing unit can be combined with several types of
third party indoor units and is intended for R410A use only.
When installing indoor units, mind the following:
▪ Expansion valve. Install an R410A expansion valve on each
indoor unit. Insulate the feeler block of the expansion valve.
INFORMATION
▪ Install either a mechanical thermostatic expansion
valve, or an electronic expansion valve (proportional or
pulse type).
▪ When installing a pulse-type electronic expansion
valve, make sure to protect the piping from pressure
waves caused by the opening and closing of the valve.
The installation of a pulse type expansion valve is the
responsibility of the installer.
For more information, see "4.2.6To select the expansion valve"on
page8.
▪ Solenoid valve. Install an R410A solenoid valve (with an
operating differential pressure of 3.5MPa [35bar] or more) on the
primary side of the 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 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.
▪ Defrosting type. Use either off-cycle defrosting or electric heater
defrosting models. Do NOT use hot-gas defrosting models.
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 or 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 expansion valve is compatible with
R410A.
4Preparation
4.1Preparing the installation site
4.1.1Installation site requirements of the
outdoor unit
Mind the spacing guidelines. See the "Technical data" chapter, and
the figures on the inside of the front cover.
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 equipment is compliant with Class A of EN55032/
CISPR 32. In a residential environment this equipment
may cause radio interference.
INFORMATION
The sound pressure level is less than 70dBA.
4.2Preparing refrigerant piping
4.2.1About 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:
ItemDescription
Piping diameterMust comply with requirements. See
Piping material
Piping length and
height difference
Piping insulationIf deteriorated, must be replaced.
Welded connectionsMust be checked for gas leaks.
Cleaning pipingIf the old condensing unit did NOT use the
Must comply with requirements. See To
insulate the refrigerant piping.
same refrigerant (R410A) and the same oil
(FVC68D) as the new one, you must clean
the piping to remove any residue.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
Installation and operation manual
7
4 Preparation
t
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4.2.2Refrigerant piping requirements
NOTICE
Refrigerant R410A requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
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
(a) 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.
4.2.4To select the piping size
Determine the proper size using the following tables and reference
figure (only for indication).
A/a: Piping between outdoor unit and piping
branching
Liquid pipingØ9.5 mm
Gas pipingØ19.1 mm
(a) Same diameter as the connection on the outdoor unit.
(b) Use the accessory piping to adapt the diameter of the
outdoor unit stop valve (Ø15.9 mm) to that of the field
piping (Ø19.1 mm).
(a)
(b)
B+C/b+c: Piping between piping branching
Use diameters depending on the total capacity of the indoor units
connected downstream.
CapacityPiping outer
diameter
Liquid piping<4.0kWØ6.4mm
4.0≤x<8.4kWØ9.5mm
Gas piping<1.0kWØ9.5mm
1.0≤x<6.0kWØ12.7mm
6.0≤x<8.4kWØ15.9mm
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.
4.2.5To select refrigerant branch kits
For refrigerant piping branching, it is allowed to use T-joints, Y-joints,
refnet joints, and refnet headers. It is possible to use a refrigerant
branching option kit from the table below.
DescriptionModel name
Refnet header
Refnet joint
(a)
(b)
KHRQ22M29H
KHRQ22M20T
KHRQ22M29T9
(a) Do NOT connect 2 or more headers in series. For the gas
side choose the refnet header so that the diameter of the
header is equal to the main piping diameter or equal to one
size-up of the main piping diameter.
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 "5.5.2 To determine the additional refrigerant
amount"on page15.
4.2.6To select the expansion valve
This unit has a larger subcooling ratio for the liquid refrigerant
compared to units without a subcooling mechanism, as the liquid
refrigerant is being cooled by a double tube heat exchanger
(subcooling ratio = condensing temperature–liquid refrigerant
temperature at outdoor unit outlet).
(b) Choose the refnet joint so that the incoming and outgoing
piping diameters match with one of the available diameters
of the refnet joint. For more information, see
"4.2.3Refrigerant piping material"on page8 and
"4.2.4To select the piping size"on page8.
INFORMATION
Maximum 8 branches can be connected to a header.
When selecting an expansion valve for the load according to the
technical information of the expansion valve manufacturer, take into
account the subcooling ratio (K) for the liquid refrigerant in the table
below.
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.
ModelMinimum circuit
ampacity
LRMEQ36.5A16A3N~ 50Hz
LRMEQ49.1A
Remote operation switch, low-noise switch and output signals
wiring
NOTICE
Remote operation switch. The unit is factory-equipped
with an operation switch with which you can turn unit
operation ON/OFF. If you want to remotely turn outdoor
unit operation ON/OFF, a remote operation switch is
required. Use a voltage-free contact for microcurrent
(≤1 mA, 12 V DC). Connect to X2M/C+D, and set to
"Remote ".
The operation switch is located in the switchbox (see illustration
below).
Recommended
fuses
Power supply
380-415V
NOTICE
Output signals. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240VAC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
▪ C/C1: caution signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1: warning signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ R/P2: run signal – connection optional – when the
compressor is running.
▪ P1/P2: operation signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
WiringSheathed cable (2 wires)
Vinyl cords
0.75~1.25mm²
Maximum wiring length130m
5Installation
5.1Opening the units
5.1.1To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
5.2Mounting the outdoor unit
The operation switch can be set to the following three positions:
Operation switch setting Function
OFFUnit operation turned OFF
ONUnit operation turned ON
RemoteUnit controlled (ON/OFF) with remote
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑18]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1mA, 12VDC). Connect to X2M/A+B.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
operation switch
5.2.1To provide the installation structure
Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
Installation and operation manual
9
5 Installation
(mm)
>150
620
350
(345-355)
4× M12
a
20
a
4× M12
a
a
5.3Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.3.1Using the stop valve and service port
a Make sure not to cover the drain holes.
INFORMATION
The recommended height of the upper protruding part of
the bolts is 20mm.
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.
5.2.2To install the outdoor unit
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The stop valve is factory closed.
NOTICE
In addition to a gas and liquid stop valve, the outdoor unit
has two maintenance stop valves. When connecting the
refrigerant piping to the outdoor unit, do NOT operate the
maintenance stop valves. The factory setting for these
valves is "open". When operating the unit, always leave
these valves in the open position. Operating the unit with
the valves in the closed position may cause the
compressor to fail.
5.2.3To prevent the outdoor unit from falling
over
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.
Installation and operation manual
10
a Maintenance stop valve
To open the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3 When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
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