Electric expansion valve
Type AKV 10P and AKV 10PS
For liquid injection into evaporators
AKV 10P and AKV10PS are electric operated
expansion valves designed for refrigeration
plants.
The AKV 10P and AKV 10PS valves are normally
controlled by a controller from Danfoss range
of ADAP- KOOL® controllers, that ensures a
precise liquid injection into evaporators.
The AKV 10P and AKV 10PS valves are supplied
as a part program, as follows:
• Separate valve
• Separate coil with terminal box, DIN plug or
cable
• Spare parts in the form upper part, orice and
lter
The orice and piston assemblies are
replaceable. The AKV 10P and AKV 10PS valves
cover a wide capacity range.
AI274942819146en-000601
Electric expansion valve, type AKV 10P and AKV 10PS
Features
Precise control of liquid injection
• Optimum utilization of the evaporator
• Increased energy eciency and COP
• Improved overall system performance
• Enables energy saving minimum stable superheat and adaptive defrost algorithms due to turbulent ow
• Provides excellent distribution and oil return
• Repetitive operation of the valve at all conditions
Superior valve technology
• Soft pulse operation makes possible to have a low noise valve that guarantees precise ow control and increased
energy eciency of the system
Fully Serviceable valve
• Fast troubleshooting during system diagnostics
• Replaceable lter and orice assembly
• Special Service coil available for installation and servicing
Fast opening/closing within sec.
• Quick reaction to the operating condition.
• Minimizes the risk of liquid refrigerant owing into the compressor at shut down and low pressure cut out at start
up
• Normally closed Solenoid tight shut-o valve
• Prevents migration of the refrigerant during stand-still
• Reduced complexity by reducing number of components in the system
Supports variety of refrigerants with wider regulation range
• This product is validated in accordance to ATEX, EN 378, ISO 5149, ASHRAE 15, IEC 60335-2-x or equivalent
standards.
• Ignition risk is evaluated in accordance to ISO 5149 and IEC 60335.
• See safety note below.
WARNING:
Safety notes:
• The product can be applied on systems with R454C, R454A, R1234ze, R1270, R290, R32, R444B, R452B, R454B,
R600, R600a, R455A, R516A, R1234yf as the working uid.
• For countries where safety standards are not an indispensable part of the safety system Danfoss recommend the
installer to get a third party approval of the system containing ammable refrigerant.
• Note, please follow specic selection criteria stated in the datasheet for these particular refrigerants.
• The valve must only be used in closed circuit refrigeration system, where no oxygen is present acc. EN 378, ISO
5149 ASHRAE 15 or IEC 60335-2-x or equivalent standards.
WARNING:
It is recommended to selected Servo operated AKV 10PS valves for those application where higher MOPD (with low
coil power) and high dampening is required.
Technical data - Standard coils for AKV 10P / AKV 10PS
The products (only refer to IP65/67 coils) are validated in accordance to ISO 5149, IEC 60335 (ref. IEC/EN
60079-15). Ignition risk is evaluated in accordance to ISO 5149 and IEC 60335 (ref. IEC/EN 60079-15). See safety
note below.
2.
Please make sure that there is no spark, arc during the application, especially the connection of coils.
3.
Follow the instruction to mount the coil correctly and apply the O-ring for sealing, to prevent the moisture
penetrate inside the coils.
4.
Always install a fuse ahead of the coil to avoid short circuit (fuse size should be around 2 times of rated current,
and time lag: medium);
5.
The coil used in an area of not more than pollution degree 2.
WARNING:
Safety notes:
1.
The product (only refer to IP65/67 coils) can be applied on systems with R454C, R454A, R1234ze, R1270, R290,
R32, R444B, R452B, R454B, R600, R600a, R455A, R516A, R1234yf as the working uid.
2.
For countries where safety standards are not an indispensable part of the safety system Danfoss recommend the
installer to get a third party approval of the system containing ammable refrigerant.
3.
Note, please follow specic selection criteria stated in the datasheet for these particular refrigerants.
4.
Note that the product (only refer to IP65/67 coils) has NOT been veried ATEX or IECEx or IEC 60079 series zone 2
compliant. This product is only validated for systems in compliance with ISO5149, IEC 60335 (ref. IEC/EN
60079-15). It is the responsibility of the user to verify such compliance. Improper use can cause explosion, re,
leakage potentially causing death, personal injury, or damage to property.
Electric expansion valve, type AKV 10P and AKV 10PS
Design
Table 9: Design
Material
1.
Copper
2.
Copper
3.
Cu/Tn
4.
Stainless steel
5.
Nylon/stainless steel
6.
Brass
7.
Stainless steel
8.
Stainless steel
The valve capacity is regulated by means of pulse-width modulation. Within a period of six seconds a voltage signal
from the controller will be transmitted to and removed from the valve coil. This makes the valve open and close for
the ow of refrigerant.
The relation between this opening and closing time indicates the actual capacity. If there is an intense need for
refrigeration, the valve will remain open for almost all six seconds of the period. If the required amount of
refrigeration is modest, the valve will only stay open during a fraction of the period.
The amount of refrigeration needed is determined by the controller. When no refrigeration is required, the valve will
remain closed and thus function as a solenoid valve.
AKV 10P0 - AKV 10P8 is a direct operated valve which can operate at 0 bar/0 psi dierential pressure.
AKV 10PS4 - AKV 10PS8 is a servo piston operated valve which needs a minimum dierential pressure of 0.1 bar /
Electric expansion valve, type AKV 10P and AKV 10PS
Dimension and weight standard coils
Table 14: Dimension and weight standard coils
Dimensions and weight UL coils
Table 15: Dimensions and weight UL coils
Appendix: Dimensioning of the liquid line
Correctly dimensioned liquid line
To obtain a correct supply of liquid to the AKV 10P/PS valve, the liquid line to the individual AKV 10P/PS valve must
be correctly
dimensioned.
The liquid ow rate should not exceed 1 m/s (3 ft/s).
Dimensioning of the liquid line must be based on the capacity of the valve at the pressure drop with which it is
operating and not on the evaporator’s capacity.
Check the connection between valve and a controller
Incorrect voltage/frequency
Check coil
specication against measured operating
voltage
Dierential pressure too high/low
Check
dierential pressure of valve against technical
speciifcation
Replace with suitable valve and or coil
Impurities in the valve
Check dirt inside valve and clean out impurities
Burnt out coil
Never take the coil
o the valve if voltage is applied.
The coil can burn out
Check the wiring diagram and wiring itself
Check relay contacts, lead connections and fuses
Valve stuck open after being assembled
Check Instruction if all correct parts are used, and correctly assembled
Valve does not open after
orice has been exchanged
to a larger capacity due to high dierential pressure
Replace with suitable valve and or coil
Internal leakage/ valve does not close or closes partially
Continuous voltage on coil
Do not remove powered coil
o the valve
Impurities in the valve
Check dirt inside valve and clean out impurities
Pulsation in discharge line
Dierential pressure too
high in open position
Check pressure and
ow conditions
Check the supply voltage in the coil
Replace with suitable valve
Electric expansion valve, type AKV 10P and AKV 10PS
Table 16: CO
2
Table 17: R407A
NOTE:
The conditions are the same as for the rated capacities.
Evaporating temperature is -10 °C for refrigeration and -30 °C for freezing.
The super heat is 8 K for both refrigeration and freezing.
Pipes are according ANSI or DIN-EN.
If conditions deviate from above, the pipe dimensions should be checked.
Permanent magnet for AKV 10P and AKV 10PS (for in-
stallation and testing purpose)
018F0091
Electric expansion valve, type AKV 10P and AKV 10PS
Accessories
Figure 4: Plug for DIN
spade connection
Single pack = 1 product in a box with installation guide
Multi pack = box with x pieces single pack (can be split)
Industrial pack = x pieces in one box (cannot be split)
Electric expansion valve, type AKV 10P and AKV 10PS
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.
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