Electric regulating valves
Type CCMT 3L, 5L, 8L and 10L
One valve, 3 applications: HPV, GBV and EEV
The CCMT Light is an electrically operated valve
designed specically for operation in CO
systems.
The CCMT Light valve concept is designed to
fulll global refrigeration requirements.
The valve is capable of functioning either as an
expansion valve, as a pressure regulator for the
gascooler or as a gas bypass valve with backpressure regulation in transcritical or subcritical
applications.
2
Features:
• Designed for CO2 systems with maximum
working pressure of 140 bar / 2030 psig with
steel connections
• Designed for CO2 systems with maximum
working pressure of 130 bar / 1885 psig (120
bar / 1740 psig for UL approval) with Bi-metal
connection
• The CCMT Light is compatible with oil types
PAG and POE
• All-in-one function module ensures optimum
regulating accuracy, particularly at part load
• Patented cone and balance design
• The PTFE (TFM) seat provides excellent valve
tightness
• Steel connections with combined butt weld,
sleeve welding and brazing
• Unique bi-metal solder connections requiring
small amount of heat
• MOPD up to 90 bar / 1305 psi
• Integrated M12 male connector for simple
and exible connection to the motor driver
• Low weight and compact design
• Easy to service from the top by removing a
single function module insert
• For manual operation and service of the
CCMT an AST-g service driver is available
AI334224263620en-000201
Superheat controller / driver,
type EKE 2U
Superheat controller / driver,
type EKE 1P
Electronic driver type AK-PC
572
Electronic driver type AK-PC
7XX
Electronic driver type AK-XM
208C
(1)
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Portfolio overview
Related products
Table 1: Portfolio overview
(1)
(1)
Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AK-
Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AKXM-208C.
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Applications
Application 1 and 2
The CCMT Light valve is developed for transcritical CO2 applications. The CCMT valve can be used in systems with
ash gas bypass, parallel compression as well as in stand-alone applications.
The CCMT Light valve can be used in transcritical and subcritical conditions.
CCMT Light valves are typically used for liquid expansion and as ash gas bypass and high pressure regulation.
Figure 1: Application
Application 1 - High Pressure Valve (HPV)
The function of the high pressure valve is to control the high pressure in the system according to the reference from
the controller. The reference can be set to obtain the optimum COP, optimum capacity or any other factors. Pressure
optimization is performed by the CCMT valve, which is installed at the outlet of the gas cooler (see the gure above)
and a matching Danfoss controller. This design provides the possibility to optimize gas cooler pressure in all
situations and intermediate receiver pressure independently.
Please refer to the www.danfoss.com/CO2 for more information on CO2 systems.
Application 2 - Gas bypass Valve (GPV)
A gas bypass valve is typically used to regulate the intermediate pressure in a transcritical CO2 refrigeration system,
in order to keep the intermediate pressure low. By venting ash gas generated through a gas bypass valve to the
suction side of the compressor after the transcritcal expansion, the pressure can be kept at a safe level for all
components situated in the liquid lines of a transcritical CO2 system . The two phase mixture from the CCMT valve
has to be separated before gas enters the gas bypass. For use in the gas bypass applicaton the Danfoss AK
controllers are recommended.
140 bar / 2030 psig with steel connections
130 bar / 1885 psig (120 bar / 1740 psig for UL approval) with Bi-metal connections
Refrigerant temperature range
-20 – 55 °C / 4 – 131 °F on valve inlet
-40 – 55 °C / 40 – 131 °F on valve outlet
Ambient temperature
- 40 – 50 °C / - 40 – 122 °F
Valve body material specication
Stainless steel
Built-in strainer / lter
No
Comply with P.E.D.
Fluid group I / Article 3, paragraph 3
Approval
cURus, EAC
Parameter
CCMT 3L, 5L, 8L and 10L
Stepper motor type
Bi-polar - permanent magnet
Motor enclosure
IP 67
Step mode
2 phase full step, microstepping (recommended)
Phase resistance
15 Ω ±10%
Phase inductance
16 mH
Phase current
Using chopper drive: 350 mA RMS +/- 10 %
Holding current
No voltage driver. Current controller: 20% of max. current
Duty cycle
20% duty cycle of period time 50 sec
Max. total power
Current drive: 1.8 W
Step rate
Chopper current drive: 100 steps/sec
Total full steps
210 steps
Full travel time
2.1 sec. ( at 100 steps sec. )
Reference position
Overdriving against full close position
Overdrive in close position
Max. 10% of total full steps
Overdrive in open position
Not Allowed
Electrical connection
Integrated M12 male connector
Compatible controllers
EKE 1P, EKE 2U, AK-PC 572, AK-PC 7xx, AK-XM 208C
(1)
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Product specication
Technical data
Table 2: Technical data
Electrical data
Table 3: Electrical data
(1)
(1)
Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AK-XM
Please refer to CCMT Light installation guide for correct valve insulation recommendation related to usage of electronic driver type AK-XM
208C
208C
WARNING:
At power failure the CCMT Light valve will remain in the actual opening position it has at the moment of power
failure, unless a safety device in the form of a battery backup is installed.
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Design
Figure 3: Design
Stepper motor switch sequence
Table 4: Stepper motor switch sequence
Table 5: Danfoss cable connections
Figure 4: CCMT Light valve
If the controller driving the CCMT Light valve is from another manufacturer than Danfoss or a custom design, the
following points must be considered in order to overcome potential step loss.
To ensure total closing of the valve, and to compensate the lost steps after a dened number of changes in opening
degree. the controller should have a function to overdrive the valve in the closing direction. It is recommended to
overdrive ten percent of the full steps range at appropriate intervals.
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Accessories
M12 angle cable
M12 angle cable
M12 angle female connector is intended for use with the standard M12 male connector on CCMT Light valves. The
Danfoss cable is designed to oer high exibility and proper tensile strength. The Danfoss M12 cable also consists of
paired, twisted wires, which decreases mutual inuence between signals transmitted along the cable and reduces
inuence of external sources of interference. The cable thus provides a higher degree of protection against lost
steps compared to other cables.
Electric regulating valves, Type CCMT 3L, 5L, 8L and 10L
Certicates, declarations, and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
Table 12: Certicates, declarations, and approvals
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