Danfoss KVS 1C, KVS 2C, KVS 3C, KVS 5C Data sheet

Data Sheet

Electric regulating valve

Type KVS 1C, 2C, KVS 3C, KVS 5C

KVS Colibri® is a series of electric suction modulating valves for AC transport and refrigeration applications.

Accurate temperature or pressure control is obtained by modulating the refrigerant ow in the evaporator with a current or voltage driver.

The balanced design provides bi-ow operation as well as solenoid shut-o function in both ow directions at MOPD 40 bar (580 psig).

AI285537379493en-000202

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Features

• Precise control

◦ Precise pressure and temperature control

• Liniar ow chararateristic

◦ Repetitive operation of the valve at all conditions

• Balanced cage design

◦ Higher MOPD ◦ Easily ts in various application and operating conditions ◦ Bi-ow

• Direct driven valve motor technology

◦ Powerful motor that guarantees precise ow control and increased energy eciency of the system ◦ Reduced complexity by reducing number of parts

• Supports variety of refrigerants, approved for oil free applications

◦ Wide application scope ◦ Supports an extended list of refrigerants ◦ Approved for oil free application

• Fast opening/closing time of 2.5 sec.

◦ Quick reaction to the operation condition

• Solenoid tight shut-o

◦ Prevents migration of the refrigerant during stand-still

• Compact, lightweight and in-line design

◦ Flexible and easy integration in any system

• Bi-Metal connectors

◦ Fast and improved brazing process – no wet wrap needed

• Stainless construction

◦ Internal and external corrosion resistant

• Fully hermetic laser welded design

◦ Hermetic valve in accordance to EU F-gas Regulation EU 517/2014 ◦ No external leakage which saves cost on maitenance and refrigerant loss ◦ Protecting the environment and climate

• Manufactured according to ISO/TS 16949

◦ Second – to – none quality and reliability

Temperature sensor

Evaporator

Controller

KVS Colibri® regulating valve

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Applications

Figure 1: Typical application

Features

Description

Compatible refrigerants

R1233zd(E), R1234yf, R1234ze(E), R1270, R134a, R22, R227ea, R23, R245fa, R290, R32, R404A, R407A, R407B, R407C, R407F, R407H, R410A, R412A, R413A, R417A, R422A, R422B, R422D, R427A, R438A, R442A, R444B, R447A, R448A, R449A, R449B, R450A, R452A, R452B, R454A, R454B, R454C, R455A, R463A, R500, R502, R507A, R512A, R513A, R513B, R515A, R515B, R516A, R600, R600a

Refrigerant oil

POE, PVE, All mineral oils, ester oils and supports oil free

Complies with PED

Yes, Fluid group 1 and 2, Article 4 paragraph 3

MOPD

40 bar / 580 psi

Max. working pressure PS/MWP

50 bar (g) / 725 psi (g)

Refrigerant temperature range (measured at the inlet of the valve)

-40 – 100 °C / -40 – 212 °F

Ambient temperature

-40 – 70 °C / -40 – 158 °F

Capacity control range

10% – 100% of total opening degree

Initial opening

5% = 30 full steps

Environmental transport/storage temperature and humidity

Max. 75 °C / 167 °F, Humidity: <100% RH

Material of construction

Body: Stainless Steel / Connector: Bimetal (stainless steel and copper)

Features

Description

Motor enclosure

IP67

Stepper motor type

Bi-polar - permanent magnet

Step mode

Microstepping (recommended), 2 phase full step or half step

Phase current

800 mA peak / 600 mA RMS

Holding current

No permanent holding current needed. Max. 20% permanent holding current recommended For optimal performance, driver should keep 100% current on coils 10ms after last step

Phase resistance

10 Ω ± 10% at +20 °C / 68 °F

Inductance

14 mH ± 25%

Duty cycle

20%

Nominal Power consumption

7.44 W RMS at 20 °C (total, both coils)

Total number of full steps

600

Step rate

Current control driver: a. Step type: Microstep (1⁄4 th or higher): 240 full steps/sec. recommended b. Step type: Full step or Half steps: 240 full steps/sec. recommended Emergency close : 240 full steps/sec. OEMs with 3rd party controller, please contact Danfoss

NOTE! For refrigerant temperatures above 70 deg.C => only use micro step!

Step translation

0.0167 mm/step

Full travel time

2.5 seconds at 240 steps/sec

Opening stroke

10 mm / 0.4 in.

Reference position

Overdriving against the full close position

Overdriving performance

1% (6 full steps) Overdrive is recommended for optimum performance 628 steps in closing direction recommended for initialisation Overdriving in open position not recommended

M12 connector

According to EN 61076-2-101

Compatible driver

Danfoss driver: EKE 1A, EKE1B and EKE 1C

Certain third party drivers. Contact Danfoss for details

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Product specication

Technical data

Table 1: Technical data

Electrical data

Table 2: Electrical data

1

2

3

5

4

12345

Valve body in stainless steel

Connections in bi-metal

M12 electrical connection

Stepper motor

Cage and slider

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Figure 2: Flow curves

Coolselector®2

Is a Danfoss calculation and selection software, designed to make selection processes for all refrigeration projects easier and less time consuming. For fast and precise selection of valve, use Danfoss’ CoolSelector2® software. You can download it from http://coolselector.danfoss.com

Design and function

The KVS Colibri® in-line electronic valve regulates refrigerant ow by means of an internal cage slider which moves in a linear motion. This occurs by the rotation of a spindle assembly which moves when electrical pulses are applied to the motor. The direction of the rotation of the spindle depends on the phase relationship of the power pulses.

The valve design is pressure balanced, giving identical bi-ow performance capabilities and nearly identical maximum capacities. Operating the KVS Colibri® series requires a controller that can provide 800mA peak/ 600mA RMS current per phase in order to achieve the operational temperature and MOPD envelope of the valve.

Figure 3: KVS Colibri design and function

a.b.c.

d.

B

A

Total no. of step

Step rate

Phase current

Overdriving against closing position

CLOSING

Coil A Coil B

OPENING

Pin A 1 A 2 B 1 B 2

Wire color White Black Red Green

S T E P

1 + - + -

2 + - - +

3 - + - +

4 - + + -

1 + - + -

Color code is only valid fo Danfoss M12 cable

B1

B2

A1

A2

Danfoss

34G152.10

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Figure 4: KVS colibri direction ow

Driver guidelines

KVS Colibri valves use a bipolar, 2-phase, permanent magnet stepper motor. KVS valves can be driven using various electronic control techniques i.e.: Full step excitation mode, half step excitation mode, micro stepping mode (recommended). On selecting controller from other manufacturer than Danfoss, it is necessary to set the following correct valve data into the controller setting. The wrong settings may impair the performance of the valve.

NOTE:

If the controller driving the KVS Colibri 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 dened 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 the valve at appropriate intervals as specied in the specication table.

WARNING:

At power failure the KVS Colibri valve will remain in the actual opening position it has at the moment of power failure, unless a device in the form of a battery backup to the controller is installed.

Stepper motor switch sequence

NOTE: Electrical check of stepper motor and wiring: coil A and coil B = 10 Ω at 20 °C / 68 °F.

NOTE: Cable length

Depending on the type of controller or driver, there will be limitations in cable length between the controller / driver and the valve. Both the actual cable length, the level of EMC emission on the location and the driver circuit have an impact on the actual distortion of the current to the motor. On using 3rd party longer cable, make sure that the valve receives the exact current as dened in the specication.

1.2.3.4.5.

On exciting Phases B1 and A1 simultaneously, the permanent magnets on the rotor are moved in the

intermediate position between phase B1 and phase A1.

When phases A1 and B2 are excited simultaneously, the rotor is then positioned between phases A1 and B2.

Next, by exciting the successive adjacent pairs of phases sequentially i.e phases B2 and A2, phases A2 and B1,

and phases B1 and A1, the rotor rotates through two phase excitations.

By completely reversing the cycle in the following sequence phases B1 and A1 to phases A2 and B1 to phases

B2 and A2 to phases A1 and B2, the stepper motor then reverses its rotation.

The stepper motor is stopped by holding the phase excitation for a specied period at the last phase of

forward or reverse rotation.

A1 B1

excited excited excited excited

Stator

Rotor

Plain view

Enlarged view

Rotor

Stepper motor

A1 B2 A2 B2 A2 B1

A2

A1

B1

B2

B1

A1

A2

N

S

N

B1

B2

B1

A1

A2

N

S

N

B1

B2

B1

A1

A2

N

S

N

B1

B2

B1

A1

A2

B1

Danfoss

R64-2110.10

N

S

S S

S

A1

A2

A1

A2

A1

B2

B1

B2

B1

S

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Operation principle

This section explains the operation of the two phase full step excitation method in a bipolar stepper motor.

Fig shows the simplied diagram of a rotor and a stator. The Full stepping operation is summarized below. When a current in a form of a pulse ows to a given phase, that phase of the stator is excited as shown in Fig.

NOTE: KVS Colibri valves can also be driven by micro stepping excitation method (preferred) in addition to the one

explained above.

M12 PVC CABLE 034G707x

LENGTH

x m / x ft xx/xx/xx

DATE

MADE IN XXXX

Danfoss

Danfoss 034G707X

1

3

4

2

1234Product type Code no.

Manufacturing data

Meters / feets

Country

MADE IN DENMARK

Colibri® Electric

Regulating valve

KVS XC

N0321B 10 Ω, 800 mA peak

PS 50bar / MWP 735psig

-40/100°C/ -40/212°F 00PPG000563300A 034GXXXX

xxxxxx-xxxxx

Danfoss A/S 6430 Nordborg, Denmark

1

2

3

6 7

8 9

10

11

4 5

Danfoss

34G91003

1234567891011

Country of origin

Valve name

Valve type

N = Nordborg -16 = week

18 = 2018 - E = Friday

Motor resistense, current

Max. working pressure

Refrigerant temperature

Code number

QR code (with traceable serial no.)

Address

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Identication

Figure 5: M12 PVC CABLE

Figure 6: KVS Colibri

L1

ØD1

L5 max L3 min L4 min

H2

H1

L2

Type

Connections

ODF x ODF (A

x B)

L1L2L3 min

L4 min

L5 maxH1H2

0D1

[in]

[mm]

[in]

[mm]

[in]

[mm]

[in]

[mm]

[in]

[mm]

[in]

[mm]

[in]

[mm]

[inch]

[mm]

[inch]

[mm]

KVS 1C

5⁄8 x

5⁄8

16 x 16

5.2

132

1.8

46.6

0.6

14.7

0.6

14.7

4.1

105

2.6

65.6

1.6

40.7249.9

KVS 2C

7⁄8 x

7⁄8

22 x 22

5.3

135

1.9

48.4

0.8200.8203.8972.6

65.6

1.6

40.7249.9

KVS 3C

11⁄8 x

11⁄8

28 x 28

5.5

139250.4

0.8200.8204

101

2.6

65.6

1.6

40.7249.9

KVS 5C

11⁄8 x

11⁄8

28 x 28

5.5

139250.4

0.8200.8204

101

2.6

65.6

1.6

40.7249.9

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Figure 7: KVS Collibri

Dimensions

Figure 8: Dimensions KVS 1C, KVS 2C, KVS 3C and KVS 5C

2000 mm / 78.7 inch 8000 mm / 314.9 inch

49 mm / 1.9 inch

12200 mm / 480.3 inch

49 mm / 1.9 inch

A2

A1

B1

B2

1

2

3

4

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Figure 9: M12 angle cable dimensions

Figure 10: M12 Straight cable dimensions

Connections

Figure 11: Connections

Type

Rated Capacity

(1)

Connections

Code no.

single pack

Code no.

I-pack

R452A

R407A

R134a

ODF

kWTRkWTRkWTR[mm]

[in.]

KVS 1C

1.27

0.36

1.39

0.40

1.10

0.31165/8

034G7860

034G7861

KVS 2C

2.54

0.72

2.78

0.79

2.20

0.62227/8

034G7950

034G7951

KVS 3C

5.29

1.50

5.80

1.65

4.57

1.30281 1⁄8

034G7960

034G7961

KVS 5C

10.36

2.95

11.37

3.23

8.97

2.55281 1⁄8

034G7850

034G7851

Cable

Cable length (L)

Insulation

Packing

Code no.

Angle cable

2 m / 6.6 ft

SR-PVC

Single pack

034G7073

Angle cable

8 m / 26.2 ft

SR-PVC

Single pack

034G7074

Straight cable

12.2 m /40 ft

SR-PVC

Single pack

034G7078

Future

Description

Jacket

PVC - black

Cable outer sheat

Oil - resistant

Water proof rating

IP 67

Operating temperature range

-40 – 80 °C

Wire type

Twisted pair, cross section 20 AWG / 0.5 mm2

Cable outer diameter

7.0 mm

Minimum bending radius

10 x cable diameter

Cable combustibility / test

Flame retardant / VW-1 / CSA FT - 1

M12 standard

EN 61076-2-101

Reference standard

UL style 2464 and DIN VDE 0812

LVD directive

2014/35/EU

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Ordering

Table 3: Ordering

(1)

Rated capacity is the valve capacity at: evaporating temperature Te = -10°C (14 °F), condensing temperature Tc=+25°C (77°F), pressure drop

Rated capacity is the valve capacity at: evaporating temperature Te = -10°C (14 °F), condensing temperature Tc=+25°C (77°F), pressure drop across valve, Dp = 0.2 bar (2.9 psi).

across valve, Dp = 0.2 bar (2.9 psi).

Table 4: M12 cable

Specication

Table 5: Specication

Electric regulating valve, Type KVS 1C, KVS 2C, KVS 3C, KVS 5C

Certicates, declarations and approvals

Approvals

CE, REACH Applied for: EAC, LLC CDC EURO TYSK

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Danfoss KVS 1C, KVS 2C, KVS 3C, KVS 5C Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual