Kaysun KRE-500DX1 Operating instructions

KRE-500DX1 KRE-1000DX1
INSTALLATION, USER &
MAINTENANCE MANUAL
Cross-flow heat recovery

NOTES: The company reserves the right to modify data, pictures and all that is related to this printed matter without any notice.
pag. 2
INDEX
DECLARATION OF CONFORMITY................................................................................................................................................... page 3
GENERAL WARNINGS...................................................................................................................................................................... page 4
SYMBOLED USED ............................................................................................................................................................................. page 5
IDENTIFICATION UNIT ...................................................................................................................................................................... page 5
SECTION 1 - GENERAL CHARACTERISTICS................................................................................................................................. page 6
1.1 Presentation of the manual......................................................................................................................................................... page 6
1.2 General characteristics............................................................................................................................................................... page 6
1.3 KRE DX series technical data .................................................................................................................................................... page 6
1.4 Dimensions and weights KRE DX .............................................................................................................................................. page 7
1.5 Characteristic curves .................................................................................................................................................................. page 8
1.6 Sound power levels .................................................................................................................................................................... page 9
SECTION 2 - TRANSPORT ............................................................................................................................................................... page 9
2.1 Packing....................................................................................................................................................................................... page 9
2.2 Handling and transport ............................................................................................................................................................... page 9
2.3 Control upon reception ............................................................................................................................................................... page 9
2.4 Storage ....................................................................................................................................................................................... page 9
SEZIONE 3 - INSTALLATION AND START UP................................................................................................................................page 10
3.1 Definitions................................................................................................................................................................................... page 10
3.2 Safety Standards ........................................................................................................................................................................ page 10
3.3 Preliminary operations ............................................................................................................................................................... page 10
3.4 Choice of the installation place................................................................................................................................................... page 10
3.5 Positioning of the unit ................................................................................................................................................................. page 12
3.6 Drain tray connection.................................................................................................................................................................. page 12
3.7 Connection to the ducts.............................................................................................................................................................. page 12
3.8 Connecting the refrigerant pipes ................................................................................................................................................ page 13
3.9 Connecting PRE-DX................................................................................................................................................................... page 14
SECTION 4 - ELECTRICAL CONNECTIONS.................................................................................................................................... page 15
4.1 Electric board’s layout - DX Module .......................................................................................................................................... page 15
4.2 Wiring plan.................................................................................................................................................................................. page 16
4.3 Temperature sensor Installation ................................................................................................................................................. page 17
4.3 Wiring connection ....................................................................................................................................................................... page 18
4.4.1 Access to electrical panel........................................................................................................................................................... page 18
4.4.2 Insertion of the electrical supply line and signals for accessories ............................................................................................. page 18
SECTION 5 - SETTINGS MODULE ................................................................................................................................................... page 19
5.1 Application control ...................................................................................................................................................................... page 19
5.2 System address and network address setting............................................................................................................................ page 19
5.3 Checks before start up ............................................................................................................................................................... page 19
5.4 Module setting indications .......................................................................................................................................................... page 20
5.5 Error codes and Query .............................................................................................................................................................. page 23
SECTION 6 - PANEL SETTINGS AND ADJUSTMENTS.................................................................................................................. page 25
SECTION 7 - ORDINARY MAINTENANCE ....................................................................................................................................... page 28
7.1 Warning....................................................................................................................................................................................... page 28
7.2 Monthly checks........................................................................................................................................................................... page 28
7.3 Yearly checks ............................................................................................................................................................................. page 29
7.3.1 Biox-dx purifying system check .................................................................................................................................................. page 29
SECTION 8 - BREAKDOWN DIAGNOSTIC ...................................................................................................................................... page 30
SECTION 9 - DISPOSAL.................................................................................................................................................................... page 30
SECTION 10 - SPARE PARTS........................................................................................................................................................... page 31

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EDUARDO
ROMANO
BUSINESS UNIT MANAGER HVAC &ENERGY
FRIGICOLL, S.A. BLASCO DE GARAY, 4-6 , 08960 SANT JUST DESVERN , SPAGNA
SANT JUST DESVERN,06/11/2020

pag. 3

This manual is an integral part of the apparatus and then it must be preserved with care and it ALWAYS must accompany the machine, even in the
case of cession to another owner or user or in the case of a transfer on another system. In the case of its damage or losing, ask another copy to
the distributor Company.
The repairs or the maintenance must be carried out by expert and qualified staff as it is expected in this handbook. Don’t modify or tamper with the
machine because it can create dangerous situations and the distributor Company does not answer to possible damages.
Check the perfect integrity of all machine components. Check that in the packing all the accessories for the installation and the relevant documen-
tation, are included. In the case of not conformity turn to seller company.
The installation of the machine must be carried out by qualified Company according to the law March, 5th 1990 n° 46 which, at the end of the work,
must give to the owner, the declaration of conformity of installation workmanlike, that is in compliance with the regulations in force and with the indi-
cations of this handbook.
The distributor Company does not answer to possible damages to people, animals or things, due to wrong installation, regulations and maintenance
or due to illegitimate use.
Remember that in the use of products that use electrical energy and water, some fundamental rules of security must be observed.
In particular:
Children and handicapped people without assistance must not use the machine.
Don’t touch the machine if you are barefoot and if you are wet.
Do not proceed with cleaning or maintenance operations, before switching off the electric power supply.
Do not modify security or adjustement devices without permission and indications of the Manufacturer Company.
Do not pull, remove, twist electrical cables coming out from machine, even if these is disconnected from power supply network.
Do not walk up, sit down and/or place any objects on the machine.
Do not spurt water directly on the machine.
Do not open access doors of the machine, without positioning general switch of the system on "off" .
Do not scatter, leave close by children packing material because it could be dangerous.
GENERAL WARNINGS
pag. 4

IMPORTANT NOTES
THE HEAT RECOVERY UNITS OF KRE DX SERIES ARE ONLY SUITABLE FOR INTERNAL INSTALLATION
The heat recovery unit is a machine designed and built exclusively to change air in the civil environments, incompatible with toxic and
inflammable gases. Therefore it cannot be used in those environments where the air is mixed and/or altered by other gaseous com-
posites and/or solid particles.
The use of the same for different purposes from those envisioned, not conform to that described in this manual, will make any direct
and/or indirect liability of the Manufacturer automatically become null and void.
IDENTIFICATION OF THE UNIT
SYMBOLS USED
WARNING
DANGER
DANGER OF ELECTRICAL SHOCK
QUALIFIED STAFF ONLY
PROHIBITION
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B
A
C
D
E
F
G
H
L
M
I
AManufacturer's mark
BManufacturer's address
CModel
DSerial number
EVoltage; number of phases; frequency
FMaximum absorbed current [A]
GCode
HManufacturing date
IIP Grade
LCE mark
MBarcode
pag. 5

SECTION 1 - GENERAL CHARACTERISTICS
1.1 Presentation of the manual
This manual describes the rules for the transportation, the installation, the use and the maintenance of the heat recovery. The user will find every-
thing that is normally useful to know for a correct and safe installation of the KRE DX unit.
The non-observance of what is described in this handbook and an inadequate installation of the KRE DX unit may cause the cancellation of the
guarantee that the Manufacturer/Distributor Company grants on the same one. The Manufacturer/distributor Company, moreover, does not
answer to possible direct and/or indirect damages due to wrong installation carried out by inexpert and/or non-authorised staff. At the moment of
the purchase, check that the machine is integral and complete. Claims will have to be produced within 8 days from the reception of the goods.
1.2 General characteristics
• Galvanized steel self-supporting panels, internally and externally insulated
• Counterflow air-to-air heat recovery device, made of plane sheets of special paper with special sealing to keep airflows separate and only
permeable to water vapor. Total heat exchange with temperature efficiency up to 76% and enthalpy efficiency up to 67%, also at high
level during summer season
• ISO 16890 Coarse 50% + ePM2.5 95% (F9 EN779) efficiency class filters on fresh air, Coarse 50% (G3 EN779) filer on return air intake. All
filters are made with synthetic cleanable media.
• Removable side panel to access filters and heat recovery in the event of scheduled maintenance
• Motorised heat recovery by-pass device automatically controlled by unit control to use fresh air free-cooling when convenient
•Low consumption, high efficiency & low noise direct driven fans with EC motors
•Supply section complete with DX coil (R410A) fitted with solenoid control valve, freon filter, contact temperature sensors on liquid and gas
line, NTC sensors upstream and downstream airflow
•Integrated sanitization system BIOX-DX®, switched on at fans running, able to do an efficient antibacterial treatment, ensuring a perfect heal-
thiness of supplied air
• Built-in electric box equipped with PCB to control internal fan speed and to interconnect outdoor/indoor units
• Duct connection by circular plastic collars
• PRE-DX-500 electric pre-heating module (available as an accessory) for temperatures below -5 °C.
1.3 KRE DX series technical data
MODEL KRE- 500DX1 1000DX1
Nominal air flow m3/h 500 1000
Nominal external static pressure Pa 90 115
Electrical power supply V/ph/Hz 220 - 240 / 1 / 50
Total full load amperage A0.6 2.1
WORKING LIMITS
Limit working temperature °C / % - 15 …+ 40°C / 10 … 95 %
FANS
Motor typology EC EC
Number of speeds 33
Fan control (1) Man Man
Internal specific fan power of ventilation components - SFP int (5) W/(m3/s) 547 881
Total nominal power input kW 0.15 0.39
Sound pressure level (2) dB(A) 39 43
HEAT EXCHANGER
Winter thermal effic. (3) %76.0% 76.0%
Winter enthalpy effic. (3)%67.0% 62.0%
Summer thermal effic. (4) %76.0% 76.0%
Summer enthalpy effic. (4) %63.0% 60.0%
Dry thermal efficiency (5) %76.0% 76.0%
DX COIL
Heating capacity (6) kW 2,5 (2,7) 5,2 (6,7)
Approximate supply air temperature at (6) condition °C 28,0 (27,3) 28,5 (27,8)
Approximate supply air humidity at (6) condition %16 (15) 15 (14)
Total cooling capacity (7) kW 3.0 5.8
Sensible cooling capacity kW 2.1 4.1
Approximate supply air temperature at (7) condition °C 15.9 16.2
Approximate supply air humidity at (7) condition %90 89
pag. 6
KRE- 500DX1 1000DX1

ACCESSORIES
• Electric pre-heater module - PRE-DX
Finned pipe coil with safety thermostats enclosed between galvanized steel plates with duct round adapters downstream and upstream, to be pla-
ced externally, connected to the suction of fresh air stream.
1.4 Dimensions and weights KRE DX
(1) Man = Manual by selector switch or control panel;
(2) Sound pressure level calculated at 1 m far from service side of casing, with ducted supply, exhaust, return and fresh air, at nominal condi-
tions return-fresh air intake/service side, at nominal conditions.
(3) Outside air at -5° 80% RH; room air at 20°C 50% RH
(4) Outside air at 32° 50% RH; room air at 26°C 50% RH
(5) Refeer to EU 1253/2014 regulation: at nominal pressure; air conditions refer to EN 308 standard
(6) Air inlet condition: 13°C DB, RH 40% (11°C DB, RH 45%); condensing temp. 40°C
(7) Air inlet condition: 28,5°C DB, RH 50%; evaporating temp. 7°C
pag. 7
Model
Dimension [mm]
Weight net / gross
[Kg]
Packing
dimensions
[mm]
Packaging
overlap
A B C D E E1 FF1 G L T K M N P R S Y Z
KRE-500DX1 904 1450 107 200 825 1445 960 830 19 955 500 135 270 350 135 135 202 350 135 90 - 98 1750x1120x420 6
KRE-1000DX1 1216 1750 85 250 1130 1750 1273 1140 19 1290 621 171 388 550 146 241 151 415 195 105 - 120 2080x1460x540 5

1.5 Characteristic curves
0
50
100
150
200
250
300
0 100 200 300



External static pressure [Pa]
400 500 600
Air flow [m3/h]
0
100
200
300
400
500
0 200 400 600 800 1000 1200 1400



External static pressure [Pa]
Air flow [m3/h]
KRE-500DX1
KRE-1000DX1
pag. 8

KRE-500DX1 Sound power levels Lw at center band frequencies Total Lw
Hz 63 125 250 500 1000 2000 4000 8000
Supply duct dB(A) 32.8 37.9 54.9 55.5 54.2 52.2 44.0 33.9 60.5
Exhaust duct dB(A) 32.8 46.9 54.2 55.6 55.0 52.2 44.0 33.9 60.7
Outside the casing dB(A) 27.8 33.1 42.8 41.3 40.0 37.4 12.7 9.0 47.0
1.6 Sound power levels
Noise at nominal working point
KRE-1000DX1 Sound power levels Lw at center band frequencies Total Lw
Hz 63 125 250 500 1000 2000 4000 8000
Supply duct dB(A) 46.4 52.9 60.1 59.3 59.0 59.0 52.5 47.9 66.0
Exhaust duct dB(A) 45.8 52.5 57.0 58.1 56.6 57.2 52.0 47.9 64.1
Outside the casing dB(A) 41.1 41.4 44.8 44.3 43.0 43.2 20.3 17.9 51.0
Noise at nominal working point
SECTION 2 - TRANSPORT
2.1 Packing
• The regenerators and their accessories are inserted in cardboard boxes that will have to remain integral until the moment of the assembly.
• The components that, due to technical requirements, are not assembled, are supplied packed in a suitable covering and fixed to the inside or
outside of the unit.
2.2 Handling and transport
• For the handling, in function of the weight, use adequate means in conformity to the directive 89/391/EEC and successive modifications.
• The weight of every single machine is shown on the attached technical data sheet.
• Avoid rotations without control.
• Take utmost care during loading operations: all the machines must be loaded and stored in the truck interposing opportune spacers to safe-
guard all protruding parts like water couplings, handles, hinges.
2.3 Control upon reception
Upon reception of the goods, please carry out a control of all the parts, verifying that the transport has not caused damages. All damages must
be communicated to the carrier, putting a reserve clause on the delivery note and specifying the type of damage.
2.4 Storage
In case of long term storage, keep the machines protected from dust and from all sources of vibrations and heat.
The manufacturer company declines every responsability for damages due to uncorrect unloading or not sufficient protection
against atmospheric agents.
pag. 9

SEZIONE 3 - INSTALLATION AND START UP
3.1 Definitions
CUSTOMER - The customer is the person, the agency or the company, that has acquired or rented the unit and that uses it for the conceived
purpose.
USER / OPERATOR - The operator or user is the physical person who has been authorised from the customer to operate with the machine
SPECIALISTIC STAFF - Intended are all those physical persons who have achieved a specific training, are therefore in a position to recognize
the dangers deriving from the use of this machine and are able to avoid them.
3.2 Safety Standards
The Manufacturer/Distributor Company declines whichever responsability for the non observance of the emergency and prevention norms
described below.
It declines furthermore responsibility for damages caused by an improper use of the unit and/or by modifications carried out without authoriza-
tion.
• The installation must be carried out by expert and qualified staff.
• During installation operations, use suitable accident-prevention clothing, as an example: glasses, gloves, etc as indicated by the 686/89/EEC
and successive norms.
• During installation, operate in absolute safety, in clean surrounding and free from impediments.
• Respect the laws in force in the Country in which the unit is installed, concerning the use and the disposal of the packings and the products
used for cleaning and maintainig the machine and follow the manufacturer instructions of such products.
• Before putting the unit in function, check the perfect integrity and safety of all components and of the entire system.
• Avoid at all cost to touch the parts in motion or to intefere with the same ones.
• Do not proceed with cleaning or maintenance operations, before switching off the electric power supply.
• The maintenance and the substitution of damaged or worn out parts of the unit must be carried out by qualified staff only and following the
indications contained in this handbook.
• Spare parts must correspond to the requirements defined by the Manufacturer Company.
• In case of dismantling of the unit, follow the relevant antipollution norms.
N.B. When using the unit, the installer and the user must take into account and place remedy to all the other types of risk connected with the
sistem. As an axample risks deriving from entry of foreign bodies, or risks deriving from the conveying of dangerous gases that are inflamma-
ble or toxic at high temperature.
3.3 Preliminary operations .
• Check the perfect integrity of all components.
• Check that in the packing all the accessories for the installation and the relevant documentation, are included.
• Transport the packed section as close as possible to the installation place.
• Do not put tools or weights over the packed unit.
3.4 Choice of the installation place
• Place the unit on a solid structure that shall not causes vibrations and that is solid enough to support the weight of the machine.
• Do not place the unit in rooms where inflammable gases, acids or aggressive and corrosive substances may be present. These could dama-
ge the different components in an irreparable way.
• Foresee a minimum free space as shown on the following figures, to make possible the carrying of scheduled and not scheduled maintenan-
ce; in order to do maintenance to BIOX-DX system, allow accessibility from lower side around supply section with DX coil.
pag. 10