Operating Envelope
ZBD*KCE
ZFD*KVE
Condensing Temperature (°C)
70
60
50
40
30
Copeland Scroll Digital™ brings
20
the latest technology innovation
10
Refrigerant R404A, 10K superheat
to easily control refrigeration capacity.
0
-50
-40
-30
-20
-10
0
10
20
Evaporating Temperature (°C)
Copeland Scroll Digital™ - Extended Product Range
Model Overview
Model
Nominal
Horsepower
hp
Displacement Cooling Capacity
(100%)
m3/h
kW
COP
(100%)
Weight
Power Supply
kg
V / Ph / Hz
EN 12900 Medium Temperature, R404A: Evaporating -10°C, Condensing 45°C, Suction return gas 20°C, Subcooling 0K
ZBD21 KCE
3
8
5,0
2,1
30
ZBD30 KCE
4
12
7,0
2,2
37
ZBD38 KCE
5
15
8,5
2,1
38
ZBD45 KCE
6
17
10,2
2,1
40
ZBD76 KCE
10
29
17,9
2,2
62
Copeland Scroll Digital™
400 / 3 / 50
EN 12900 Low Temperature, R404A: Evaporating -35°C, Condensing 40°C, Suction return gas 20°C, Subcooling 0K
ZFD18 KVE*
6
17
6,0
1,5
43
The Simple Solution for
Capacity Modulation
in Refrigeration
400 / 3 / 50
* Digital Scroll™ compressor with Enhanced Vapour Injection Technology (EVI)
A Complete Package: Digital Scroll™ Compressor Is Ready to Be Controlled By Alco Controls
Alco Controls offers a series of controllers that can control the Digital Scroll™ compressor in a refrigeration
equipment. All controllers have TCP/IP networking capabilities and web server function.
EC2-552 controls condensing units including fan speed,
using up to two compressors, of which one can be a Digital Scroll™
G R U P A
C1.2.17/0906-0908/E
EC3-65X controls racks using up to eight single-stage compressors of which
one can be a Digital Scroll™
For more details, see www.emersonclimate.eu
Emerson Climate Technologies - European Headquarters - Pascalstrasse 65 - 52076 Aachen, Germany
Phone: +49 (0) 2408 929 0 - Fax: +49 (0) 2408 929 570 - Internet: www.emersonclimate.eu
d.o.o.
The Emerson Climate Technologies logo is a trademark and service mark of Emerson Electric Co. Emerson Climate Technologies Inc. is a subsidiary of Emerson Electric Co.
Copeland is a registered trademark and Copeland Scroll is a trademark of Emerson Climate Technologies Inc.. All other trademarks are property of their respective owners.
Information contained in this brochure is subject to change without notification.
© 2008 Emerson Climate Technologies, Inc.
MB FRIGO Grupa d.o.o., Bani 81, 10010 Zagreb, tel. 01 66 08 002, fax 01 66 08 005, www.mbfrigo.hr
Emerson Climate Technologies is the world's leading compressor
manufacturer, delivering comprehensive solutions for numerous
Benefits of Copeland
Scroll Digital™
refrigeration applications. Copeland Scroll Digital™ is the latest
technology innovation to easily control refrigeration capacity.
Digital Mechanism
Copeland Scroll Digital™
Modulate Refrigeration Capacity. Easily.
On many refrigeration systems the load will vary over a
wide range, thus requiring the use of compressor capacity
control. Traditional schemes of modulation include variable speed drives, unloaders, hot gas bypass or paralleling.
Some of these solutions generally face various problems,
as they are often complicated or imply reliability concerns.
Some require a high level of technical skills or an unaffordable first cost investment. Others do not provide the efficiency level or system stability originally promised, while
others end up being too complex to allow a quick and
easy integration into the existing equipment.
Now all these issues belong to the past.
Copeland Scroll Digital™ Brings Innovation
to Refrigeration
Based on the unique Copeland Compliant Scroll®
design, the digital modulation operates on a simple
mechanism (as shown in figure 1). Capacity control is
achieved by separating the scroll sets axially over a
small period of time (as shown in figure 2). It is a simple
mechanical solution allowing precise temperature
control and system efficiency.
Simplicity
With Digital Scroll™ technology you can
offer your customers (manufacturers,
contractors, end-users):
• Simple, stepless, continuous modulation
for precise temperature control
• Reduced energy consumption
Solenoid Valve
Control Precision and Efficiency
Bleed Hole
Digital Scroll™ technology provides continuous, stepless modulation from 10% to 100% with no operating
envelope restriction. As a result, system pressures and
temperatures are tightly controlled. Tests showed a
temperature variation of +/-0.5K in the display cases.
More stable evaporating temperatures result in less
dehumidification of the food, reduction of weight loss
and preservation of food quality. Compressor cycling
is reduced to a minimum, ensuring optimum system
efficiency and longer life expectancy of the equipment.
Low condensing capability down to 10°C also ensures
the best seasonal efficiencies on the market.
• Highly flexible load matching
from 10% to 100%
Lift Piston Assembly
Modulation Chamber
• An economical and reliable alternative
to variable speed drive
Spring
• Longer lasting refrigeration equipment
due to fewer compressor cycling
With 10% to 100% digital modulation,
the higher the number of evaporators in
a refrigeration system, the more benefits
you are able to offer to your customers.
Reliability
Figure 1: Digital Mechanism
The refrigerant flow back to a Digital Scroll™ compressor is identical to a standard scroll compressor, even
at low capacity. The Digital Scroll™ compressor runs
at full speed at all times, never slowing the oil flow to
the compressor. Its reliability level is as high as in standard compressors. It does not cause motor overheating or resonance vibrations in the plant.
Cycle Time
The compressor capacity is controlled by
modulating the solenoid valve input over
time. For example, for a cycle time of
20 seconds if the valve is closed for 10
50% Modulation
Loaded
10 sec
20 sec
2: Cycle
Time
MB FRIGO Grupa d.o.o., Bani 81, 10010 Zagreb, tel. 01 66 Figure
08 002,
fax
01 66 08 005, www.mbfrigo.hr
seconds and opened for 10 seconds, the
capacity is 50%. If it closes for 8 seconds,
the capacity becomes 40%.
d.o.o.
Unloaded
10 sec
2
pressure on the lower side of the piston
forces it upwards, bringing with it the
upper scroll – there is no compression.
When the solenoid closes, pressure builds
up in the modulation chamber. A small
bleed hole speeds the pressure build up
in the chamber. The upper scroll moves
down to its normal contact position –
compression resumes.
G R U P A
Digital Scroll™ technology is a modulation solution
that can be dropped into any existing system design.
It is quick and easy to implement, because it does not
require other components. To make the design process
even simpler, Emerson Climate Technologies and Alco
Controls have developed a series of controllers that
operate the Digital Scroll™ compressor.
The modulation is achieved with a cycle
time based on PWM (Pulse Width Modulation) control of a solenoid valve that
operates a piston fitted rigidly to the
upper scroll. This piston is actuated by
gas pressure.
The solenoid opens to allow the modulation chamber to communicate with
suction via the external tube. Discharge
40% Modulation
12 sec
8 sec
20 sec
3