Daikin SERHQ020BAW1, SERHQ032BAW1, SEHVX20BAW, SEHVX32BAW, SEHVX40BAW Installer reference guide
...
Installer and user
reference guide
Split packaged air-cooled water chiller
SERHQ020BAW1
SERHQ032BAW1
SEHVX20BAW
SEHVX32BAW
SEHVX40BAW
SEHVX64BAW
Installer and user reference guide
Split packaged air-cooled water chiller
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 ............................................................................... 4
1.3 For the installer.......................................................................... 4
1.3.1 General ....................................................................... 4
1.3.2 Installation site ............................................................ 4
1.3.3 Refrigerant .................................................................. 5
1.3.4 Brine............................................................................ 5
1.3.5 Water .......................................................................... 6
1.3.6 Electrical ..................................................................... 6
2 About the documentation 6
2.1 About this document.................................................................. 6
2.2 Installer and user reference guide at a glance .......................... 7
For the installer 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Outdoor unit............................................................................... 8
3.2.1 To unpack the outdoor unit ......................................... 8
3.2.2 To handle the outdoor unit.......................................... 8
3.2.3 To remove the accessories from the outdoor unit....... 8
3.3 Indoor unit ................................................................................. 8
3.3.1 To unpack the indoor unit ........................................... 8
3.3.2 To handle the indoor unit ............................................ 9
3.3.3 To remove the accessories from the indoor unit......... 9
4 About the units and options 9
4.1 Overview: About the units and options...................................... 9
4.2 Identification .............................................................................. 9
4.2.1 Identification label: Outdoor unit ................................. 10
4.2.2 Identification label: Indoor unit .................................... 10
4.2.3 About the outdoor unit................................................. 10
4.2.4 About the indoor unit................................................... 10
4.2.5 About combining units and options............................. 10
4.2.6 Operation range .......................................................... 10
4.3 Combining units and options ..................................................... 11
4.3.1 Possible options for the split system........................... 11
4.4 System layout............................................................................ 11
5 Preparation 11
5.1 Overview: Preparation............................................................... 11
5.2 Preparing the installation site .................................................... 11
5.2.1 Installation site requirements of the outdoor unit ........ 11
5.2.2 Installation site requirements of the indoor unit .......... 12
5.3 Preparing refrigerant piping....................................................... 13
5.3.1 Refrigerant piping requirements.................................. 13
5.3.2 To select the piping size ............................................. 13
5.3.3 About the piping length ............................................... 13
5.4 Preparing water piping .............................................................. 13
5.4.1 Water circuit requirements .......................................... 13
5.4.2 Formula to calculate the expansion vessel pre-
pressure ...................................................................... 15
5.4.3 To check the water volume and expansion vessel
pre-pressure................................................................ 15
5.4.4 Changing the pre-pressure of the expansion vessel... 16
5.4.5 To check the water volume: Examples ....................... 16
5.5 Preparing electrical wiring ......................................................... 16
5.5.1 About preparing electrical wiring................................. 16
5.5.2 About electrical compliance ........................................ 16
5.5.3 Cable requirements..................................................... 17
5.5.4 Safety device requirements ........................................ 17
6 Installation 17
6.1 Overview: Installation ................................................................. 17
6.2 Opening the units ....................................................................... 17
6.2.1 About opening the units ............................................... 17
6.2.2 To open the outdoor unit.............................................. 17
6.2.3 To open the indoor unit ................................................ 18
6.2.4 To open the electrical component box of the outdoor
unit ............................................................................... 18
6.2.5 To open the electrical component box of the indoor
unit ............................................................................... 18
6.3 Mounting the outdoor unit........................................................... 18
6.3.1 About mounting the outdoor unit.................................. 18
6.3.2 Precautions when mounting the outdoor unit............... 19
6.3.3 To provide the installation structure ............................. 19
6.3.4 To provide drainage ..................................................... 19
6.4 Mounting the indoor unit............................................................. 19
6.4.1 About mounting the indoor unit .................................... 19
6.4.2 Precautions when mounting the indoor unit................. 19
6.4.3 To provide the installation structure ............................. 19
6.5 Connecting the refrigerant piping ............................................... 20
6.5.1 Precautions when connecting the refrigerant piping .... 20
6.5.2 To braze the pipe end .................................................. 20
6.5.3 Using the stop valve and service port .......................... 21
6.5.4 To connect the refrigerant piping to the outdoor unit ... 21
6.5.5 To connect the refrigerant piping to the indoor unit ..... 23
6.6 Checking the refrigerant piping .................................................. 23
6.6.1 About checking the refrigerant piping .......................... 23
6.6.2 Precautions when checking the refrigerant piping ....... 24
6.6.3 Checking refrigerant piping: Setup............................... 24
6.6.4 To check for leaks: Pressure leak test ......................... 24
6.6.5 To perform vacuum drying ........................................... 24
6.6.6 To insulate the refrigerant piping ................................. 24
6.7 Charging refrigerant ................................................................... 25
6.7.1 About charging refrigerant ........................................... 25
6.7.2 Precautions when charging refrigerant ........................ 25
6.7.3 To determine the additional refrigerant amount ........... 25
6.7.4 To charge refrigerant ................................................... 25
6.7.5 Checks after charging refrigerant................................. 25
6.7.6 To fix the fluorinated greenhouse gases label ............. 26
6.8 Connecting water piping............................................................. 26
6.8.1 About connecting the water piping............................... 26
6.8.2 Precautions when connecting the water piping............ 26
6.8.3 To connect the water piping......................................... 26
6.8.4 To fill the water circuit .................................................. 26
6.8.5 To insulate the water piping ......................................... 27
6.9 Connecting the electrical wiring.................................................. 27
6.9.1 About connecting the electrical wiring.......................... 27
6.9.2 Precautions when connecting the electrical wiring ...... 27
6.9.3 Field wiring: Overview.................................................. 28
6.9.4 About the electrical wiring ............................................ 28
6.9.5 To route and fix the power supply................................ 29
6.9.6 To connect the power supply of the outdoor unit ......... 29
6.9.7 To connect the power supply and transmission
cables........................................................................... 31
6.9.8 Guidelines when knocking out knockout holes ............ 31
6.9.9 To install the user interface.......................................... 31
6.9.10 To install optional equipment ....................................... 32
7 Configuration 32
7.1 Overview: Configuration ............................................................. 32
7.2 Making field settings................................................................... 32
7.2.1 About making field settings
7.2.2 Field setting components ............................................. 33
7.2.3 To access the field setting components....................... 33
7.2.4 To access mode 1 or 2 ................................................ 33
7.2.5 To use mode 1 ............................................................. 34
7.2.6 To use mode 2 ............................................................. 34
7.2.7 Mode 1: Monitoring settings......................................... 34
7.2.8 Mode 2: Field settings.................................................. 34
7.2.9 Field settings on the user interface .............................. 35
.......................................... 32
Installer and user reference guide
2
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
1 General safety precautions
7.3 Switching between cooling and heating .................................... 40
8 Commissioning 40
8.1 Overview: Commissioning......................................................... 40
8.2 Precautions when commissioning ............................................. 41
8.3 Checklist before commissioning the outdoor unit...................... 41
8.4 Checklist before commissioning the indoor unit ........................ 41
8.5 Final check ................................................................................ 42
8.6 About the test run ...................................................................... 42
8.6.1 To display the temperature on the remote controller .. 43
8.6.2 To test space heating/cooling ..................................... 43
8.7 Correcting after abnormal completion of the test run ................ 43
8.8 Checklist handover to the user.................................................. 43
8.9 To complete the model fill-in ..................................................... 43
9 Maintenance and service 44
9.1 Overview: Maintenance and service ......................................... 44
9.2 Maintenance safety precautions................................................ 44
9.2.1 To prevent electrical hazards...................................... 44
9.3 About service mode operation................................................... 44
9.3.1 To use vacuum mode ................................................. 44
9.3.2 To recover refrigerant ................................................. 44
9.4 Checklist for yearly maintenance of the indoor unit................... 45
10 Troubleshooting 45
10.1 Overview: Troubleshooting........................................................ 45
10.2 Error codes: Overview ............................................................... 45
11 Disposal 46
12 Technical data 46
12.1 Overview: Technical data .......................................................... 46
12.2 Service space: Outdoor unit ...................................................... 46
12.3 Service space: Indoor unit ......................................................... 47
12.4 Piping diagram: Outdoor unit..................................................... 48
12.5 Piping diagram: Indoor unit ....................................................... 49
12.6 Wiring diagram: Outdoor unit .................................................... 50
12.7 Wiring diagram: Indoor unit ....................................................... 50
12.8 Technical specifications: Outdoor unit....................................... 51
12.9 Field settings on the user interface – overview ......................... 52
12.10 Field settings on the outdoor unit .............................................. 54
12.11 ESP curve: Indoor unit .............................................................. 55
For the user 55
13 About the system 55
13.1 System layout ............................................................................ 55
14 User interface 56
15 Before operation 56
17.2.3 Recommended maintenance and inspection cycles .... 65
18 Troubleshooting 65
18.1 Error codes: Overview ................................................................ 66
19 Relocation 66
20 Disposal 66
21 Glossary 67
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 in the installer reference guide MUST be
performed by an authorised 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.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious
injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate
injury.
16 Operation 57
16.1 Operation range ........................................................................ 57
16.2 Quick start-up ............................................................................ 57
16.3 Operating the system ................................................................ 58
16.3.1 About the clock ........................................................... 58
16.3.2 About operating the system ........................................ 59
16.3.3 Space cooling operation ............................................. 59
16.3.4 Space heating operation ............................................. 59
16.3.5 Other operation modes ............................................... 60
16.3.6 Schedule timer ............................................................ 60
16.3.7 Operating the optional demand PCB .......................... 64
16.3.8 Operating the optional external control adapter .......... 64
16.3.9 Operating the optional remote controller..................... 64
17 Maintenance and service 64
17.1 About the refrigerant.................................................................. 65
17.2 After-sales service and warranty ............................................... 65
17.2.1 Warranty period .......................................................... 65
17.2.2 Recommended maintenance and inspection .............. 65
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
NOTICE
Indicates a situation that could result in equipment or
property damage.
INFORMATION
Indicates useful tips or additional information.
Symbol Explanation
Before installation, read the installation and
operation manual, and the wiring instruction sheet.
Before performing maintenance and service tasks,
read the service manual.
For more information, see the installer and user
reference guide.
Installer and user reference guide
3
1 General safety precautions
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:
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.
▪ 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
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 aluminium 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.
NOTICE
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
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.
1.3.1 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.
Installer and user reference guide
4
1.3.2 Installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the weight and vibration
of the unit.
▪ 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.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
1 General safety precautions
▪ 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
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 recharge is required, see 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 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.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
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.
▪ 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
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.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
Installer and user reference guide
5
2 About the documentation
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 1 minute,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you
can touch electrical components. For the location of the
terminals, see the wiring diagram.
▪ Do NOT touch electrical components with wet hands.
▪ Do NOT leave the unit unattended when the service
cover is removed.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
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.
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
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 above.
▪ 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 m away from televisions or radios to
prevent interference. Depending on the radio waves, a distance of
1m 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
INFORMATION
Make sure that the user has the printed documentation and
ask him/her to keep it for future reference.
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)
Installer and user reference guide
6
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
3 About the box
b
a
▪ Installation and operation manual:
▪ Installation and operation instructions
▪ Format: Paper (in the box of the indoor 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
Business Portal (authentication required).
For installation of the heat pump unit (location, piping, and wiring),
refer to the installation and operation manual of the RXYQ*.
INFORMATION
First read the indoor unit manual, and only then the
outdoor unit manual.
2.2 Installer and user reference guide at a glance
Chapter Description
General safety
precautions
About the documentation What documentation exists for the
About the box How to unpack the units and remove
About the units and
options
Preparation What to do and know before going
Installation What to do and know to install the
Configuration What to do and know to configure the
Operation Operation of the units
Commissioning What to do and know to commission the
Hand‑over to the user What to give and explain to the user
Maintenance and service How to maintain and service the units
Troubleshooting What to do in case of problems
Disposal How to dispose of the system
Technical data Specifications of the system
Field settings table Table to be filled in by the installer, and
Glossary Definition of terms
Safety instructions that you must read
before installing
installer
their accessories
▪ How to identify the units
▪ Possible combinations of units and
options
on‑site
system
system after it is installed
system after it is configured
kept for future reference
For the installer
3 About the box
3.1 Overview: About the box
This chapter describes what you have to do after the boxes with the
outdoor and indoor unit are delivered on-site.
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage. Any damage
MUST be reported immediately to the claims agent of the carrier.
▪ 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.
▪ Prepare the path along which you want to bring the unit inside in
advance.
▪ When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor
damage.
▪ Prepare the path along which you want to bring the unit inside in
advance.
a Opening
b Forklift
▪ A forklift can only be used for transport as long as the unit remains
on its pallet as shown above.
▪ A forklift can only be used for transport as long as the unit remains
on its pallet as shown above.
▪ If a forklift is to be used, preferably transport the unit with pallet
first, then pass the forklift arms through the large rectangular
openings on the bottom of the unit.
▪ Once at final position, unpack the unit and pass the forklift arms
through the large rectangular openings on the bottom of the unit.
NOTICE
Cover the forklift arms with a cloth to prevent damaging the
unit. If the paint on the bottom frame peels off, the anticorrosion effect may decrease.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
Installer and user reference guide
7
3 About the box
1 2
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b
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3.2 Outdoor unit
3.2.1 To unpack the outdoor unit
Remove the packaging material from the unit:
▪ Take care not to damage the unit when removing the shrink foil
with a cutter.
▪ Remove the 4 bolts fixing the unit to its pallet.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
NOTICE
Cover the forklift arms with a cloth to prevent damaging the
unit. If the paint on the bottom frame peels off, the anticorrosion effect may decrease.
3.2.3 To remove the accessories from the outdoor unit
Make sure that all accessories are available in the unit.
a General safety precautions
b Fluorinated greenhouse gases label
c Multilingual fluorinated greenhouse gases label
d Gas side accessory pipe
e Gas side accessory pipe
f Liquid side accessory pipe
g Liquid side accessory pipes
3.2.2 To handle the outdoor unit
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
▪ Lift the unit preferably with a crane and 2belts of at least 8m long
as shown in the figure below. Always use protectors to prevent
belt damage and pay attention to the position of the unit's centre
of gravity.
Installer and user reference guide
8
a Packaging material
b Belt sling
c Protector
d Large opening
e Small opening (40×45)
f Forklift
NOTICE
Use a belt sling of ≤20mm wide that adequately bears the
weight of the unit.
3.3 Indoor unit
3.3.1 To unpack the indoor unit
Remove the packaging material from the unit:
▪ Take care not to damage the unit when removing the shrink foil
with a cutter.
▪ Remove the 4 bolts fixing the unit to its pallet.
▪ Take care not to drop the unit when removing it from the pallet. Lift
the unit with at least 2installers.
WARNING
Tear apart and throw away plastic packaging bags so that
nobody, especially children, can play with them. Possible
risk: suffocation.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
4 About the units and options
1 2
b
a
8×
a d ec
1×
b
1× 1×
f g
h
2×
1× 1×1×/2×
i
2×
j k
3×2×
l
2×
3.3.3 To remove the accessories from the indoor unit
a General safety precautions
b Installation manual and operation manual (panel 3)
c User interface (panel 3)
d Tie wraps (panel 3)
e Shut-off valves (panel 3)
f Threaded connection (panel 3) (1× for SEHVX20+32BAW,
2× for SEHVX40+64BAW)
g Filter (panel 3)
h Elbow (panel 3)
i Black grommet (2×)
j L-shaped support (2×)
k M5 screws (3×)
l Accessory pipes (Ø12.7→Ø9.52 and Ø25.4→Ø28.6)
3.3.2 To handle the indoor unit
a Opening
▪ A forklift can only be used for transport as long as the unit remains
on its pallet as shown above.
b Forklift
4 About the units and options
4.1 Overview: About the units and options
This chapter contains information about:
▪ Identifying the outdoor unit
▪ Identifying the indoor unit
▪ About the outdoor unit
▪ About the indoor unit
▪ Combining the split system with options
▪ Where the outdoor and indoor units fit in the system layout
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.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
Installer and user reference guide
9
4 About the units and options
43
–5
0
0 5 20 25
LWE
T
A
A B
4.2.1 Identification label: Outdoor unit
Location
Model identification
Example: SE RH Q 020 BA W1
Code Explanation
SE Special European model
RH Outdoor/low water temperature
Q R410A refrigerant
020 Capacity class
BA Model series
W1 Power supply: 3P, 400V
4.2.2 Identification label: Indoor unit
4.2.4 About the indoor unit
This installation manual concerns the inverter heat pump chilling unit
with separate hydro module. The unit is intended for indoor
installation and can be combined with VRV outdoor units
(SERHQ020+032BAW1) for air conditioning purposes, or it can be
used for supplying water for process cooling applications.
The units are available in 4 standard sizes with nominal capacities
ranging from 16.8 to 63 kW.
The unit is designed to work in heating mode at ambient
temperatures from –15°C to 35°C and in cooling mode at ambient
temperatures from –5°C to 43°C.
The main component is the water heat exchanger.
The indoor unit is connected to the outdoor unit by field refrigerant
piping and the compressor in the outdoor unit circulates refrigerant
into the heat exchangers.
▪ In cooling mode, the refrigerant transports the heat taken from the
water heat exchanger to the air heat exchanger where the heat is
released to the air.
▪ In heating mode, the refrigerant transports the heat taken from the
air heat exchanger to the water heat exchanger where the heat is
released to the water.
4.2.5 About combining units and options
This packaged air-cooled water chiller can be combined with fan coil
units and is intended for R410A use only.
The indoor unit can be combined with fan coil units and is intended
for R410A use only.
Location
Model identification
Example: SE HVX 20 BA W
Code Explanation
SE Special European model
HVX Indoor unit / Floor-standing
20 Capacity class
BA Model series
W Power supply: 3P, 400V
4.2.6 Operation range
Cooling
TAAmbient temperature (°CDB)
LWE Leaving water evaporator temperature (°C)
A Standard water operation range
B Pull down area
4.2.3 About the outdoor unit
SERHQ outdoor units are designed for outdoor installation and are
meant to be combined with SEHVX indoor units.
The outdoor units are designed to work in heating mode at ambient
temperatures from –15°C WB to 35°C WB and in cooling mode at
ambient temperatures from –5°CDB to 43°CDB.
Installer and user reference guide
10
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
5 Preparation
0
35
25
5
–15
5 (EWC) 20 25 35 50
LWC
T
A
A B
RC
RT1M1RT2M2RT3
M3
FC1 FC2 FC3
a c e f
f
g g g
h
db
Heating
TAAmbient temperature (°CDB)
LWC Leaving water condenser temperature (°C)
EWC Entering water condenser temperature (°C)
A Pull up area
B Standard water operation range
4.3 Combining units and options
4.3.1 Possible options for the split system
INFORMATION
Refer to the technical engineering data for the latest option
names.
Remote controller (EKRUAHTB)
A second remote controller to control the unit from 2 locations.
Demand PCB (EKRP1AHTA)
To enable the power saving consumption control by digital inputs
you must install the demand PCB.
For installation instructions, see the installation manual of the
demand PCB. In case of SEHVX40+64BAW, 2 sets of this option
are required.
External control adaptor (DTA104A62)
To instruct specific operation with an external input coming from a
central control, the external control adaptor can be used. Instructions
(group or individual) can be given for low noise operation and power
consumption limitation operation. In case of SEHVX40+64BAW, 2
sets of this option are required.
4.4 System layout
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
a Outdoor unit
b Indoor unit
c Plate heat exchanger
d Pump
e Expansion vessel
f Shut-off valve
g Motorized valve
h Bypass valve
FC1…3 Fancoil unit (field supply)
RC User interface
RT1…3 Room thermostat
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 water piping
▪ Preparing the electrical wiring
5.2 Preparing the installation site
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.
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the weight and vibration
of the unit.
▪ Make sure the unit is level.
▪ 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.
▪ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location is
selected according the applicable legislation.
▪ During installation, avoid the possibility that anybody can climb on
the unit or place objects on the unit.
▪ All piping lengths and distances have been taken into
consideration (see "5.3.3About the piping length"[413]).
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.
▪ 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.
Installer and user reference guide
11
5 Preparation
b
c
a
a
b
c
d
c
d
≥1500
≥1500
a
d
e
b
(mm)
f
c
≥1000≥1000
≥1000
≥1500
≥1500
≥1000
b
c
≥1500≥1500
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.
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
This unit is suitable for installation in a commercial and
light industrial environment.
▪ When installing, take strong winds, typhoons or earthquakes into
account, improper installation may result in the unit turning over.
▪ Be sure that the air inlet and outlet of the unit is not positioned
towards the main wind direction. Frontal wind will disturb the
operation of the unit. If necessary, use a screen to block the wind.
▪ Ensure that water cannot cause any damage to the location by
adding water drains to the foundation and prevent water traps in
the construction.
▪ In heavy snowfall areas, select an installation site where snow will
not affect the operation of the unit.
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.
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.
a Personal computer or radio
b Fuse
c Earth leakage breaker
d Cool/heat selector
e User interface
f Indoor unit
▪ In places with weak reception, keep distances of 3m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
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 Sea wind
b Building
c Outdoor unit
d Windbreaker
Installer and user reference guide
12
5.2.2 Installation site requirements of the indoor 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.
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the weight and vibration
of the unit.
▪ Make sure the unit is level.
▪ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location is
selected according the applicable legislation.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ During installation, avoid the possibility that anybody can climb on
the unit or place objects on the unit.
▪ All piping lengths and distances have been taken into
consideration (see "5.3.3About the piping length"[413]).
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.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
5 Preparation
G
L
G1
L2
G2
L1
1
2
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ 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.
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.
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
This unit is suitable for installation in a commercial and
light industrial environment.
5.3 Preparing refrigerant piping
5.3.1 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 ≤30mg/10m.
▪ Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
Pipe Ø Temper grade of piping material
≤15.9mm O (annealed)
≥19.1mm 1/2H (half hard)
▪ All piping lengths and distances have been taken into
consideration (see "5.3.3About the piping length"[413]).
▪ The pipe thickness of the refrigerant piping shall comply with the
applicable legislation. The minimal pipe thickness for R410A
piping must be in accordance with the table below.
Pipe Ø Minimal thickness t
6.4mm/9.5mm/12.7mm 0.80mm
15.9mm 0.99mm
19.1mm/22.2mm 0.80mm
28.6mm 0.99mm
34.9mm 1.21mm
41.3mm 1.43mm
5.3.2 To select the piping size
Determine the proper size using the following tables and reference
figure (only for indication).
Indoor unit Outdoor unit
▪ Piping connection sizes
Indoor unit Gas Liquid Outdoor unit Gas Liquid
SEHVX20BAW Ø25.4mm Ø12.7mm 1× SERHQ020BAW1 Ø22.2mm Ø9.52mm
SEHVX32BAW Ø25.4mm Ø12.7mm 1× SERHQ032BAW1 Ø28.6mm Ø12.7mm
SEHVX40BAW Ø25.4mm Ø12.7mm 2× SERHQ020BAW1 Ø22.2mm Ø9.52mm
SEHVX64BAW Ø25.4mm Ø12.7mm 2× SERHQ032BAW1 Ø28.6mm Ø12.7mm
▪ Field piping sizes
Indoor unit G/G1 L/L1 G2 L2
SEHVX20BAW Ø28.6mm Ø9.52mm — —
SEHVX32BAW Ø28.6mm Ø12.7mm — —
SEHVX40BAW Ø28.6mm Ø9.52mm Ø28.6mm Ø9.52mm
SEHVX64BAW Ø28.6mm Ø12.7mm Ø28.6mm Ø12.7mm
If the hydro module connections do not match the diameter of the
specified piping requirements, the piping diameter requirements
must be met using reducers/expanders (field supply) on the hydro
module connections.
If the indoor unit connections do not match the diameter of the
specified piping requirements, the piping diameter requirements
must be met using reducers/expanders (field supply) on the indoor
unit connections.
Other diameters (mm sizes) can also be used if the required pipe
sizes (inch sizes) are not available, taking the following into account:
▪ select the pipe size nearest to the required size,
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
▪ use the suitable adapters for the change-over from inch to mm
pipes (field supply).
5.3.3 About the piping length
Maximum piping length and height difference
Maximum allowable piping length 30m
Height difference between indoor and outdoor unit <10m
Height difference between outdoor unit 1 and outdoor
unit 2 (if applicable)
0m
5.4 Preparing water piping
5.4.1 Water circuit requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Installer and user reference guide
13
5 Preparation
a
b
a
c
d
b
NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
▪ Connecting piping – Legislation. Make all piping connections in
accordance with the applicable legislation and the instructions in
the "Installation" chapter, respecting the water inlet and outlet.
▪ Connecting piping – Force. Do NOT use excessive force when
connecting the piping. Deformation of the piping can cause
malfunctioning of the unit.
▪ Connecting piping – Tools. Only use appropriate tooling to
handle brass, which is a soft material. If NOT, pipes will get
damaged.
▪ Connecting piping – Air, moisture, dust. If air, moisture or dust
gets into the circuit, problems may occur. To prevent this:
▪ Only use clean pipes
▪ Hold the pipe end downwards when removing burrs.
▪ Cover the pipe end when inserting it through a wall, to prevent
dust and/or particles from entering the pipe.
▪ Use a decent thread sealant to seal connections.
Capacity class Minimum required flow rate
20 23 l/min
32 36 l/min
40 46 l/min
64 72 l/min
▪ Field supply components – Water pressure and temperature.
Check that all components in the field piping can withstand the
water pressure and water temperature.
▪ Drainage – Low points. Provide drain taps at all low points of the
system in order to allow complete drainage of the water circuit.
▪ Non-brass metallic piping. When using non-brass metallic
piping, insulate the brass and non-brass properly so that they do
NOT make contact with each other. This to prevent galvanic
corrosion.
▪ Shut-off valves. Two shut-off valves are delivered with the unit.
Install them as shown in the following figure.
NOTICE
If the bend is not used during installation, replace it with an
extension (5cm long for a 1¼"filter, and 6 cm long for a
2"filter) to ensure proper cleaning operation of the filter.
NOTICE
Be sure to install the filter properly. Failure to install or
incorrect installation will damage the plate heat exchanger
permanently.
▪ Drain taps. Drain taps must be provided at all low points of the
system to permit complete drainage of the circuit. A drain valve is
provided inside the unit.
▪ Air vents. Provide air vents at all high points of the system, which
must also be easily accessible for servicing. An automatic air
purge valve is provided inside the unit. Check that this air purge
valve is NOT tightened too much, so that automatic release of air
from the water circuit is possible. Refer to field setting[E‑04] in
Field settings on the remote controller.
▪ Air vents. Provide air vents at all high points of the system, which
must also be easily accessible for servicing. An automatic air
purge valve is provided inside the unit. Check that this air purge
valve is NOT tightened too much, so that automatic release of air
from the water circuit is possible. Refer to field setting[E‑04] in
"7.2.9Field settings on the user interface"[435].
▪ Water pressure. Take care that the components installed in the
field piping can withstand the water pressure (maximum 3 bar +
static pressure of the pump). Refer to ESP curve: Outdoor unit.
▪ Water pressure. Take care that the components installed in the
field piping can withstand the water pressure (maximum 3 bar +
static pressure of the pump). Refer to ESP curve: Indoor unit.
WARNING
▪ For correct operation of the system, a regulating valve
must be installed in the water system. The regulating
valve is to be used to regulate the water flow in the
system (field supply).
▪ Selecting a flow outside the curves can cause
malfunction or damage to the unit. Also refer to the
Technical specifications.
▪ The maximum water piping temperature is 50°C according to
safety device setting.
▪ Always use materials which are compatible with the water used in
the system and with the materials used in the unit. (The unit piping
fittings are made of brass, the plate heat exchangers are made of
stainless steel 316 plates brazed together with copper and the
optional pump housing is made of cast iron.)
▪ Select the piping diameter in relation to the required water flow
and available external static pressure (ESP) of the pump. See the
following table for the recommended water piping diameter.
Capacity class Water piping diameter
20+32 1-1/4"
40+64 2"
a Adapter piece (on the inlet only in case of
SEHVX40+64BAW)
b Shut-off valve
c Bend
d Filter
NOTICE
Before mounting the bend, attach the filter to it.
Installer and user reference guide
14
NOTICE
It is strongly recommended to install an additional filter on
the water circuit. Especially to remove metallic particles
from the field water piping, it is advised to use a magnetic
or cyclone filter which can remove small particles. Small
particles can damage the unit and will not be removed by
the standard filter of the unit.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
5 Preparation
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5
9
a
b
0
0.5
1
1.5
2
2.5
3
0 50 100 150 200 250 300 350 400 450 500 550 600
A
B
33
b
a
5.4.2 Formula to calculate the expansion vessel pre-pressure
The pre-pressure (Pg) of the vessel depends on the installation
height difference (H):
Pg=0.3+(H/10) (bar)
5.4.3 To check the water volume and expansion vessel pre-pressure
The unit has an expansion vessel of 12 litre with a default prepressure of 1bar.
Minimum water volume
Model Minimum total water volume (l)
20 76
32 110
40 152
64 220
INFORMATION
In critical processes, or in rooms with a high heat load,
extra water might be required.
INFORMATION
The temperature step difference can be modified using
settings [A‑02] and [F‑00]. This has an impact on the
minimum water volume required when the unit operates in
cooling.
By default, the unit is set to have a water temperature
difference of 3.5 K which allows it to operate with the
minimum volume mentioned in the previous table.
However, if a smaller temperature differential is set, as in
the case of process cooling applications where
temperature fluctuations must be avoided, a larger
minimum water volume will be required.
To ensure proper operation of the unit when changing the
values of setting [F‑00] (for cooling mode), the minimum
water volume has to be corrected. If this volume exceeds
the range allowed in the unit, an additional expansion
vessel or a buffer tank must be installed in the field piping.
Example:
To illustrate the impact on the system when modifying the setting
[F‑00], we will consider a unit with a minimum allowable water
volume of 66l. The unit is installed 5m below the highest point in
the water circuit.
Assuming that the setting [F‑00] is changed from 5°C (default value)
to 0°C. From the below table we see that 5°C corresponds to a
temperature differential of 3.5K and 0°C to 1K, which is actually the
lowest value we can set.
[F‑00] value (°C) Temperature differential (K)
0 1
1 1.5
2 2
3 2.5
4 3
5 3.5
6 4
7 4.5
8 5
9 5.5
10 6
11 6.5
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
[F‑00] value (°C) Temperature differential (K)
12 7
13 7.5
14 8
15 8.5
The water volume correction factor according to the curve shown in
the below graph is 3.5; this means that the minimum volume will be
3.5 times larger.
Correction factor curve for minimum water volume
a Water volume correction factor
b Temperature differential (K)
When multiplying 64 l by the correction factor, we get 224 l, which
will be the minimum water volume allowed in the installation if a
temperature differential of 1K is used.
Now it is very important to check that for the height difference of the
system, the volume in the system is less than the maximum allowed
value at that pre-pressure (Pg). If we take a look at the curve, for
1bar of pre-pressure, the maximum volume allowed is 350l.
The total volume in the system will definitely be larger after adding
the internal volume of the unit. In this case, some pre-pressure can
be applied or an additional expansion vessel or buffer tank must be
installed in the field piping.
The default value of pre-pressure (Pg) is for a height difference of
7m.
If the height difference of the system is lower than 7 m AND the
volume in the system is less than the maximum allowed value at that
pre-pressure (Pg) (see graph), then NO pre-pressure (Pg)
adjustment is required.
Maximum water volume
Use the following graph to determine the maximum water volume for
the calculated pre-pressure.
a Pre-pressure (bar)
b Maximum water volume (l)
A System
B Default
If the total water volume in the entire circuit exceeds the maximum
allowed water volume (see graph), an additional expansion vessel
must be installed in the field piping.
Installer and user reference guide
15
5 Preparation
a
5.4.4 Changing the pre-pressure of the expansion vessel
NOTICE
Only a licensed installer may adjust the pre-pressure of the
expansion vessel.
The default pre-pressure of the expansion vessel is 1bar. When it is
required to change the pre-pressure, take following guidelines into
account:
▪ Only use dry nitrogen to set the expansion vessel pre-pressure.
▪ Inappropriate setting of the expansion vessel pre-pressure will
lead to malfunction of the system.
Changing the pre-pressure of the expansion vessel should be done
by releasing or increasing nitrogen pressure through the Schrader
valve of the expansion vessel.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ 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.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
a Schrader valve
5.4.5 To check the water volume: Examples
Example 1
The unit is installed 5m below the highest point in the water circuit.
The total water volume in the water circuit is 250l.
No actions or adjustments are required.
Example 2
The unit is installed at the highest point in the water circuit. The total
water volume in the water circuit is 420l.
Actions:
▪ Because the total water volume (420 l) is more than the default
water volume (340l), the pre-pressure must be decreased.
▪ The required pre-pressure is:
Pg = (0.3+(H/10))bar = (0.3+(0/10))bar = 0.3bar
▪ The corresponding maximum water volume is approximately 490l
(see graph).
▪ Because 420 l is lower than 490 l, the expansion vessel is
appropriate for the installation.
5.5 Preparing electrical wiring
5.5.1 About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
WARNING
ALWAYS use multicore cable for power supply cables.
5.5.2 About electrical compliance
This equipment complies with:
▪ EN/IEC 61000‑3‑11 provided that the system impedance Z
less than or equal to Z
at the interface point between the user's
max
supply and the public system.
▪ EN/IEC 61000‑3‑11 = European/International Technical
Standard setting the limits for voltage changes, voltage
fluctuations and flicker in public low-voltage supply systems for
equipment with rated current ≤75A.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a system impedance Z
less than or equal to Z
sys
max
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power Ssc is
greater than or equal to the minimum Ssc value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16A and ≤75A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power Ssc greater than or equal to the
minimum Ssc value.
Outdoor unit Z
(Ω) Minimum Ssc value
max
(kVA)
SERHQ020BAW1 0.27 838
SERHQ032BAW1 0.24 873
is
sys
.
Installer and user reference guide
16
Indoor unit Z
(Ω) Minimum Ssc value
max
(kVA)
SEHVX20BAW 0.27 820
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
6 Installation
4×
4×
Indoor unit Z
(Ω) Minimum Ssc value
max
(kVA)
SEHVX32BAW 0.24 874
SEHVX40BAW 0.25 1639
SEHVX64BAW 0.22 1747
The local wiring power cord must comply with IEC60245.
The wiring type in protected pipes must be H05VV; H07RN-F must
be used in unprotected pipes.
5.5.3 Cable requirements
Item Cable
bundle
1 PS Indoor unit power supply 4+GND
2 LV Communication cable between indoor
3 LV Standard remote controller (F1/F2) 2
4 LV Secondary remote controller (F1/F2)
5 LV Thermostat ON/OFF signal
6 LV Thermostat cooling/heating signal
7 LV Operation ON signal
8 LV Operation OFF signal
9 HV Cooling/heating output 2 0.3 A
10 HV Operation ON/OFF output 2 0.3 A
11 HV Error output 2 0.3 A
12 HV Water piping heater output 2 1 A
13 HV Pump ON/OFF output 2 0.3 A
unit and outdoor unit
(a) Optional
(b) Refer to the nameplate on the unit or to the technical data
book.
(c) Minimum cable section 0.75mm2.
(d) Minimum cable section 1.5mm2.
PS Power supply
LV Low voltage
HV High voltage
Description Required
(a)
(a)
(a)
(a)
(a)
number of
conductors
(d)
2
2
2
2
2
2
Maximum
running
current
(b)
(d)
(c)
(c)
(c)
(c)
(c)
(c)
5.5.4 Safety device requirements
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.
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:
1 Mounting the outdoor unit.
2 Mounting the indoor unit.
3 Connecting the refrigerant piping.
4 Checking the refrigerant piping.
5 Charging refrigerant.
6 Connecting the water piping.
7 Connecting the electrical wiring.
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 electrical wiring
▪ When maintaining or servicing the unit
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
To gain access to the unit, front plates need to be opened as follows:
INFORMATION
Multi units are standard combinations.
Outdoor unit Recommended fuses
SERHQ020BAW1 32A
SERHQ032BAW1 40A
Indoor unit Recommended fuses
SEHVX20BAW 6A
SEHVX32BAW 10A
SEHVX40BAW
SEHVX64BAW
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
Once the front plates open, the electrical component box can be
accessed. See "6.2.4 To open the electrical component box of the
outdoor unit"[418].
Installer and user reference guide
17
6 Installation
1
3
2
10×
5×
4×
4×
1
4×
For service purposes, the pushbuttons on the main PCB need to be
accessed. To access these pushbuttons, the electrical component
box cover does not need to be opened. See "7.2.3To access the
field setting components"[433].
6.2.3 To open the indoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
To gain access to the unit, front plates need to be opened as follows:
6.2.5 To open the electrical component box of the indoor unit
Panel
1 Electrical parts of the indoor unit
2 Indoor unit (side panel)
3 Indoor unit (front panel)
Once the front plates open, the electrical component box can be
accessed. See "6.2.5 To open the electrical component box of the
indoor unit"[418].
6.2.4 To open the electrical component box of the outdoor unit
NOTICE
Do NOT apply excessive force when opening the
electronic component box cover. Excessive force can
deform the cover, resulting in entering of water to cause
equipment failure.
NOTICE
Do NOT apply excessive force when opening the
electronic component box cover. Excessive force can
deform the cover, resulting in entering of water to cause
equipment failure.
6.3 Mounting the outdoor unit
6.3.1 About mounting the outdoor unit
When
You have to mount the outdoor and indoor unit before you can
connect the refrigerant and water piping.
Typical workflow
Mounting the outdoor unit typically consists of the following stages:
1 Providing the installation structure.
2 Installing the outdoor unit.
3 Providing drainage.
Installer and user reference guide
18
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
6 Installation
722-737
≥67≥67
765
6767
A
B
20 mm
a
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
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
NOTICE
▪ When the installation height of the unit needs to be
increased, do NOT use stands to only support the
corners.
▪ Stands under the unit must be at least 100mm wide.
X Not allowed
O Allowed
▪ The height of the foundation must at least be 150 mm from the
floor. In heavy snowfall areas, this height should be increased,
depending on the installation place and condition.
▪ The preferred installation is on a solid longitudinal foundation
(steel beam frame or concrete).
6.3.4 To provide drainage
NOTICE
▪ Prepare a water drainage channel around the
foundation to drain waste water from around the unit.
▪ If the unit is to be installed on a roof, check the strength
of the roof and its drainage facilities first.
▪ If the unit is to be installed on a frame, install the
waterproofing board within a distance of 150mm under
the unit in order to prevent infiltration of water coming
from under the unit.
▪ When installed in a corrosive environment, use a nut
with plastic washer (a) to protect the nut tightening part
from rust.
6.4 Mounting the indoor unit
6.4.1 About mounting the indoor unit
When
You have to mount the outdoor and indoor unit before you can
connect the refrigerant and water piping.
Typical workflow
Mounting the indoor unit typically consists of the following stages:
1 Providing the installation structure.
2 Installing the indoor unit.
3 Connecting the water piping and the refrigerant piping.
Minimum foundation
Outdoor unit A B
SERHQ020 930 792
SERHQ032 1240 1102
▪ Fasten the unit in place using four foundation bolts M12. It is best
to screw in the foundation bolts until their length remains 20mm
above the foundation surface.
6.4.2 Precautions when mounting the indoor unit
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.4.3 To provide the installation structure
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
NOTICE
▪ When the installation height of the unit needs to be
increased, do NOT use stands to only support the
corners.
▪ Stands under the unit must be at least 100mm wide.
▪ The unit must be mounted against the wall.
▪ The unit must be fixed to prevent it from tilting.
▪ The preferred installation is on a solid longitudinal foundation
(steel beam frame or concrete).
▪ Observe the minimum installation space requirements.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
Installer and user reference guide
19
6 Installation
766.5 500200
396500
(mm)
20 mm
b
a
1
1
1
1
2 2
≤Ø25.4 >Ø25.4
▪ Fasten the unit in place using four foundation bolts M12. It is best
to screw in the foundation bolts until their length remains 20mm
above the foundation surface.
▪ Fasten the unit to the floor using the holes in the bottom beams.
▪ Fasten the unit to the wall using the 2 accessory L-shaped
supports to prevent it from falling over. The supports can be fixed
to the top panel of the hydro module (2× M5 screws on either side,
but one screw is already mounted on the right side of the top
plate).
6.5 Connecting the refrigerant piping
6.5.1 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.
▪ 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.
Unit Installation period Protection method
Outdoor unit >1month Pinch the pipe
<1month Pinch or tape the pipe
Indoor unit Regardless of the
period
WARNING
Connect the refrigerant piping securely before running the
compressor. If the refrigerant piping is NOT connected and
the stop valve is open when the compressor is run, air will
be sucked in. This will cause abnormal pressure in the
refrigeration cycle, which may result in equipment damage
and even injury.
a Attach one L-shaped support to the left side of the top plate
using 2screws from the accessory bag
b Attach the other L-shaped support to the right side of the
top plate using 1screw from the accessory bag and
1screw that is already attached to the unit
NOTICE
Use the proper kind of screw for the type of wall or
foundation material where the unit will be fixed to.
Installer and user reference guide
20
6.5.2 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 20 kPa (0.2 bar) (just enough so it
can be felt on the skin) with a pressure-reducing valve.
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
6 Installation
a b c d e
f
f
c
d
a
b
a b
cde
a b c
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.
▪ Always protect the surrounding surfaces (e.g. insulation foam)
from heat when brazing.
6.5.3 Using the stop valve and service port
To handle the stop valve
Take the following guidelines into account:
▪ The stop valves are factory closed.
▪ The following illustrations show each part required in handling the
valve.
a Service port and service port cover
b Stop valve
c Field piping connection
d Stop valve cover
Counterclockwise to open.
Clockwise to close.
3 When the stop valve CANNOT be turned any further, stop
turning.
4 Install the stop valve cover.
Result: The valve is now open/closed.
INFORMATION
▪ The SERHQ020 supports Ø22.2 field piping on the
accessory pipe supplied with the unit.
▪ The SERHQ032 supports Ø28.6 field piping on the
accessory pipe supplied with the unit.
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.
Tightening torques
Stop valve
size (mm)
Ø9.5 5.4~6.6 4mm 13.5~16.5 11.5~13.9
Ø12.7 8.1~9.9 18.0~22.0
Ø25.4 27.0~33.0 8mm 22.5~27.5
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
Cap (valve
lid)
Service
port
6.5.4 To connect the refrigerant piping to the outdoor unit
a Service port
b Stop valve cover
c Hexagon hole
d Shaft
e Seal
▪ Keep both stop valves open during operation.
▪ Do NOT apply excessive force to the stop valve. Doing so may
break the valve body.
To open/close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 8mm)
into the stop valve and turn the stop valve:
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
NOTICE
All field piping must be installed by a licensed refrigeration
technician and must comply with the relevant local and
national regulations.
Seal the piping and wiring intake holes using sealing material (field
supply), otherwise the capacity of the unit will drop and small
animals may enter the machine.
Example: passing piping out through the front
a Plug the grey areas (piping routed through the front panel)
b Gas side piping
c Liquid side piping
NOTICE
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak detection.
Installer and user reference guide
21
6 Installation
a b c
c
b
h
f
d
h
a
c
b
g
h
ih
j
k
h
h
h
e
i
a
A B
A
AB
C
D
a
b
a
c
d
25
150 90
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel. Especially
for the bottom and side connection, be sure to protect
the piping with suitable insulation, to prevent it from
coming into contact with the casing.
NOTICE
Use a 2-stage vacuum pump with a non-return valve that
can evacuate to a gauge pressure of −100.7 kPa
(−1.007 bar)(5 Torr absolute). Make sure the pump oil
does not flow oppositely into the system while the pump is
not working.
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.
WARNING
NEVER directly touch any accidental leaking refrigerant.
This could result in severe wounds caused by frostbite.
The refrigerant piping can be installed from the front or from the side
of the unit (when taken out from the bottom) as shown in the figure.
Cutting the gas side accessory pipe
When connecting the refrigerant piping from the side, cut the gas
side accessory pipe as shown in the figure.
a Gas side accessory pipe
b Cut here
c Gas side piping (field supply)
d Unit base
Outdoor
A B C D
unit
SERHQ020 156 23 192 247
SERHQ032 150 29 192 251
NOTICE
▪ When connecting the piping on site, be sure to use the
accessory piping.
▪ Make sure the onsite piping does not come into contact
with other piping, the bottom frame or side panels of
the unit.
a Left-side connection
b Front connection
c Right-side connection
A For front connection, remove the stop valve cover to
connect the refrigerant piping.
B For side connection, remove the knockouts in the bottom
frame and route the piping under the bottom frame.
a Gas pipe stop valve
b Liquid pipe stop valve
Installer and user reference guide
22
c Service port for adding refrigerant
d Gas side accessory pipe (1)
e Gas side accessory pipe (2)
f Liquid side accessory pipe (1)
g Liquid side accessory pipe (2)
h Brazing
i Gas side piping (field supply)
j Liquid side piping (field supply)
k Open the knockout holes with a hammer
NOTICE
Precautions when making knockout holes:
▪ 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.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
WARNING
Never remove the pinched piping by brazing.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1C – 2019.11
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