EK keeps looking for valuable distributors and partners around
Environmentally-Friendly Refrigerant-Type Modular Air-Cooled Heat
■ Test conditions for nominal cooling capacity: nominal water flow
for cooling mode; outlet water temperature 7°C; outdoor ambient
■ Test conditions for nominal heating capacity: nominal water flow
for heating mode; outlet water temperature 7°C; temperature of
dry/wet bulb: 7°C/6°C.
■ Water resistance at the air conditioner side includes water
pressure drop of the unit and the attached Y-shaped filter.
■ The operating weight of the unit is about 1.05 to 1.1 times its
■ The water main of the modular unit needs to be customized and
installed on site. The diameter of the pipe must meet design
EK does not provide the pipe.
■ Modular units can be formed using 1~16 basic modules of the same
model or different modules as required. The above table lists the
parameters for common module combinations formed using 1 to 5
1. The 130 kW modular unit saves investments on water systems.
Compared with two 65 kW modules, one 130 kW modular unit saves the
investment on the pipeline and accessories of one water system.
2. Compared with a combination of two 65 kW modules, one 130 kW,
modular unit saves the land area by 14%.
3. The 130 kW modules support seamless installation and save the
land area by 30% compared with 65 kW modules when multiple modules
are combined during installation.
4. Sixteen 130kW modules may be combined, which easily expands the
capacity of an air-cooled modular unit from 130 kW to 2080 kW.
5. The unit inherits the advantages of the 65 kW module, and uses
the precise flow control technologies by using electronic expansion
valves and efficient plate-type heat exchangers. The system
performs optimal matching to ensure that the energy efficiency of
the unit is above the energy performance certification standard of.
6. The RoHS certified environment-friendly galvanized steel sheet
and 120μm-thick orange-peel spraying endow the unit shell with
anti-erosion, hard fall-off, and slow fading. This makes the unit
work a long time.
7. The unit adopts high-performing inner grooved copper pipes
provided by well-known suppliers, which help the refrigerant form
liquid film on the inner walls of the pipes, greatly increasing the
heat exchange efficiency.
8. Compared with the traditional air-cooled modular unit that uses
a thermal expansion valve, EK air-cooled modular unit uses 500-step
PMV electronic pulse for precise adjustment to implement precise
PID control. The system implements real-time matching and precise
water temperature control, fully improving the optimal performance
of each component inside the system. This makes the unit operate
steadily at any workload and automatically adapt to varying ambient
temperatures, solving the oscillation issue of a cooling system. In
addition, the temperature output of the system is more steady, and
the indoor temperature is more balanced, improving comfort.
9. The genuine dual-system panel-type heat exchanger can bear a 3.0
MPa pressure at the water side, and provide the pressure bearing
capability for a water system in a high building. Compared with a
shell-and-tube heat exchanger, this heat exchanger delivers higher
heat exchange efficiency, and provides a cleaner internal
environment. Compared with a traditional back-to-back heat
exchanger, it provides higher heat exchanger efficiency and
delivers higher anti-freeze capability at partial workload. When
operating at partial workload, it provides higher heat exchange
efficiency. A standard configuration provides a water pressure drop
switch to monitor the unit water flow in real time as well as
precise anti-freeze control.
10. Different from a traditional secondary pumping system, the
primary Pumping Variable Flow System features variable flows at the
refrigerant side and workload side and shares one transducer pump
group. Its flow may drop with the workload of the air conditioner,
greatly saving the operating expenses for the chilled water pump of
the air conditioning system.
11. The unit may send out 2-way valve water control signals to cut
off chilled water. This enables automatic flow control for pumps in
line with the transducer, which helps easily implement primary
Pumping Variable Flow System.
12. It is applicable to projects where the cooling workload of the
air conditioner changes greatly, and the air conditioner works at
partial workload for a long time.
13. Compared with the secondary pumping system, it saves the
initial investment on the cooling water pump and pipes at the
primary pumping system and on the power distribution system, and
requires a smaller area of the equipment room.
14. EK test center is accredited by the CNAS national test lab. The
EKAC modular air-cooled heat pump units pass the tests for extreme
conditions by the national test lab, including anti-erosion,
exhaustion, and frequent start. This endows the unit with extremely
high reliability. Each unit passes 100% reliability test before
factory delivery for quality assurance. A standard configuration
provides a water sieve and a water pressure drop switch, which
ensures that the unit does not run when the water supply is short
or cut off.
15. The unit provides 13 powerful built-in protection functions,
including protection against high/low voltage of compressors,
protection against phase loss or inversion of the power supply,
protection against frequent startup, compressor over-current
protection, compressor air exhaust temperature protection,
protection against unit overheating, sensor fault protection,
anti-freeze protection for cooling, anti-freeze protection for the
water system in winter, water flow protection, and ambient
16. The fan uses low-noise axial blades driven by the motor in
direct connection. The blades pass dynamic balance and static
balance tests. The whole unit is designed with shock isolation and
multi-plenum noise reduction. Fully hermetic volute low-noise
compressors from famous vendors and efficient low-noise fans ensure
leading-edge noise and vibration levels. With the help of noise
spectrum analysis, components such as fan and motor are carefully
compared, selected, and improved, and noises of the structure and
pipes are reduced.
17. The unit adopts intelligent defrosting technologies for precise
defrosting settings, which help make comprehensive judgment based
on the ambient temperature and suction temperature. The unit saves
energy as much as possible by automatically correcting the
conditions for defrosting based on the change curve of the coil
temperature and by taking defrosting conditions in previous periods
into account. In this manner, the unit implements precise
defrosting based on the actual conditions, ensuring maximum
operation time for normal heating, and minimizing the fluctuation
of hot water temperature due to defrosting.
18. Any EK slave module may become a master module upon switchover.
Damage to the master module does not affect running of other
modules. In addition, any combination may be formed by using
modules of the same or different models. A system may consist of 16
modules. Products of other vendors support only a specific unit as
the master module. Once the master module is damaged, the whole
system cannot work properly. As a result, debugging and maintenance
19. The unit adopts a micro computer control system with a large
screen LCD, facilitating use. Each control system can dynamically
monitor the running status of 16 units, and supports RS485
communication interfaces. The control system runs the Modbus
protocol for cluster control.
• Switching between cooling and heating modes
• Parameter setting: real-time setting, cooling/heating water inlet
/ outlet temperature, anti-freeze temperature, and defrosting
• Automatic and manual defrosting
• Timed turn-on/off on a weekly basis
• Automatic fault diagnosis
• Turn-on/off from a distance of up to 1000 m
• Chilled water pump start/stop control
• Water pump protection feedback
• Auxiliary electric heating control
• Balanced compressor wear and staged module startup
• Power failure memory
• Historic fault inquiry
• Tow-way valve control for the water system
• Interlocking control for two-way valves at ends
EKAC series modular air-cooled chilled water (heat pump) unit (130
kW) features 40 years of air-cooled heat pump design experiences
from Italy and fits into the actual applications of the modular
unit market in China. The unit implements seamless combination and
occupies less installation space and land area compared with a 65
kW modular unit. Its energy efficiency far exceeds Level 2 energy
efficiency standard of China. The unit may be widely applied to new
and reconstructed industrial and residential buildings of all
sizes, including hotels, entertainment centers, hospitals,
restaurants, office buildings, cinemas, factories, and
supermarkets. It is particularly applicable to the following
scenarios: the noise level is regulated, water is in short supply,
and cooling water towers are inapplicable. Modular units feature
flexible installation, staged investments, and a short construction
period. No cooling water systems are required, the pipeline is
simple, and the investment amount is moderate. This makes modular
units preferred by customers.