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
m
3/h
500
1000
Nominal external static pressure
Pa
90
115
Electrical power supply
V/ph/Hz
220 - 240 / 1 / 50
Total full load amperage
A
0.6
2.1
WORKING LIMITS
Limit working temperature
°C / %
- 15 …+ 40°C / 10 … 95 %
FANS
Motor typology
EC
EC
Number of speeds
3
3
Fan control
(1)
Man
Man
Internal specific fan power of ventilation components
- SFP int
(5)
W/(m
3/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
