Danfoss CTR 20 Data sheet

Data sheet
Electric 3-way valve
Type CTR 20
The CTR is an electrically operated 3-way valve designed specically for operation in CO with heat reclaim. CTR is designed to allow full proportional control of the surplus heat from compressor pack into the heat exchanger of transcritical heat reclaim solutions. The proportional control of the CTR ensures that the exact amount of heat required is available at any time, and the possibility to operate smoothly in changeover sitiuations allowing for stable control.
The typical application for the CTR is a Pack/ rack system in food retail application working with transcritical CO most attractive energy advantage of transcritical CO
. Even as transcritical CO2 systems are on
2
par or outperform traditional HFC installations on energy performance, this also ensures the possibility to supply high quality heat to be exploited. Heat reclaim is seeing an increased deployment and becoming a norm in most transcritical CO
. Heat reclaim is the current
2
retail installations today.
2
systems
2
Features • Full proportional and on / o control of the
heat reclaim system.
• 2 inlets and 1 outlet or 1 inlet and 2 outlets.
• Applicable to R744 and other common refrigerants.
• CTR is compatible with oil types PAG and POE
• Full serviceable cartridge design valve.
• Modulating operation to ensure smooth transition.
• Leak tight, motor integrated in valve.
Application:
Heat reclaim in CO
• Eliminates pressure peaks in heat reclaim systems.
• Controls transcritical pressure up to 140 bar.
• Available for combo weld or solder/braze.
• Standard M12 connector for easy connection to the motor driver.
• Internal / external corrosion resistant design.
• Manufactured according to ISO / TS 16943.
systems (transcritical).
2
For more information on the product, please scan the QR code.
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A2.02 | 1
Data sheet | Electric 3-way valve type CTR 20
Approval (in progress)
Technical data
Valve specication
Electrical specication
UL, EAC, CRN, cUL
Feature CTR 20 (DN25)
Flow 1 inlet -2 outlets or 2 inlets - 1 outlet
Refrigerant R744 (For other refrigerants please contact Danfoss)
Oil Types PAG / POE
MWP/ Refrigerant 140 bar / 2030 psig
MOPD 3 bar / 43 psi
Allowed ambient temperature range -40 – +60 °C / -40 – +140 °F
Allowed refrigerant temperature range 0 – +150 °C / +32 – +302 °F
Environment temp (Transport/Warehouse) -40 – +70 °C / -40 – +158 °F
Lifetime / endurance 10 years / 50.000 cycles in CO
Serviceable Yes
Stepper motor type Bipolar permanent motor
IP rating of electric connection 67
Step mode Microstepping (recommended), 2 phase full step
Phase resistance 52.4 ohm ±10% per coil
Inductance 85.7 mH ±20%
Current per coil 100 mA RMS / 142 mA Peak
Holding current 20% holding current (recommended)
Duty cycle 100% duty cycle is allowed
Max. total power Current driver: 1.2 Watt
Number of full steps 6600
Closing / opening time 88 sec @ 75 PPS
Step rate
Electric connector type M12
Reference position Over drive against the full close position (both top & bottom)
Overdriving in closing direction Recommended 3% of total step ie. 180 full steps
Recommended controller/driver AK-XM 208C, EKD 316, EKD 316C
Current control 75 PPS for top and bottom 10% opening / closing degree and remaining at 250 pps
75 step /sec. (recommended)
system with 3 bar di. pressure
2
© Danfoss | DCS (sw) | 2018.07
Material of construction (Housing) Stainless Steel
Installation orientation Vertical / Horizontal (Inverted not allowed)
Valve opening characteristic Linear
DKRCC.PD.VL0.A.02 | 2
Data sheet | Electric 3-way valve type CTR 20
Ordering
Spareparts
Related products
Identication, product label
Valve including actuator
Type Connection Flow rate
1
Weld
)
[inch]
CTR 20
1
) OD according to EN 10220
Type Description
Gasket O-ring spare part kit for CTR 20 (3 O-rings)
Type Description Single pack Code no.
AK-XM 208C Stepper output module 1 080Z0023
EKD 316C Superheat controller / driver (prefered EKD) 1 084B8045
EKD 316 Superheat controller / driver 1 084B8040
EKA 164A Optional display for EKD 316 1 084B8563
AST-G Manual service driver 1 034G0013
1
[inch]
1 1/
8
Solder ODF
k
[m
value
v
3
/h]
value
C
v
[gpm]
20 23.1 1
Single pack Code no
027H7244
Single pack Code no.
1 027H7248
MADE IN DENMARK : Country of origin CTR 20 DN25 : Valve type 027H7244 : Code number
MOPD: 3,00 bar / 43.0 psi : Max. operation pressure PS 140,0 bar / MWP 2030 psig : Max. working pressure CE : Approval BR0417D/103320 : (Manufactoring no.) BR = Kolding 04 = week 17 = 2017 D = Thursday
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A.02 | 3
34G211.10
Pr C
Data sheet | Electric 3-way valve type CTR 20
Accessories: M12 angle cable
M12 angle female connector is intended for use with a standard M12 male connector, available on stepper motor valves.
This cable is designed to oer high exibility and small outer diameters with tensile strength. The angle way M12 cable consist of paired, twisted wires, which decreases mutual inuence between signals transmitted along the cable and reduces inuence of external sources of interference. The cables thus provides a higher degree of protection against lost steps compared to other cables.
Approvals
Specication
Ordering
Identication
RoHS
Jacket PVC - black
Cable outer sheath Oil resistant
Water proof rating IP 67
Operating temperature range -40 – +80 °C / -40 - +176 °F
Wire type Twisted pair, cross section 20 AWG / 0.5 mm
Cable outer diameter 7.0 mm / 0.28 inch
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 73/23/EEC and 93/68/EEC
Cable Cable length (L) Insulation Packing format Code no.
PVC - black
2 m / 6.6 ft SR-PVC Single pack 034G7073
8 m / 26.2 ft SR-PVC Single pack 034G7074
oduct type
ode no
2
Connections
Dimensions
A2 black
A1 white
B1 red
B2 green
34G210.10
8 meters / 26.2 feet
Manufacturing date
Meters / Feets
Country
34G209.10
Ø 63 mm / 1/4 inch
35 mm / 1.4 inch2 meters / 6.6 feet 49 mm / 1.9 inch
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A.02 | 4
Danfoss
027H325.10
D
a
n
f
o
ss
027H325.10
Data sheet | Electric 3-way valve type CTR 20
Valve design
1. M12 connector
2. Actuator
3. Spindle
4. Valve housing
5. Connection 1
6. Connection 3
7. Connection 2
8. Valve cone
1
2
3
4
5
8
6
7
Flow direction
1 inlet 2 outlets
Connection 3 is always common inlet
2 inlets 1 outlet
Connection 3 is always common outlet
CTR Valve can be used in following ways as shown in the drawings.
Danfoss R64-3023.10
Danfoss R64-3022.10
Danfoss
xxxx.10
Danfoss
27H002.10
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A.02 | 5
MT Evaporator
Data sheet | Electric 3-way valve type CTR 20
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
Application example
MT/IT
Heat Recovery
o
55
C
LT Evaporator
Danfoss
R64-3024.10
AKS
AKS
AKVH
AKS
CCMT
AKS
HP High Pressure Receiver Pressure MT Suction Pressure LT Suction Pressure
40oC
MM
CTR
CTR
CCMT
© Danfoss | DCS (sw) | 2018.07
In CO2 systems, the higher pressure and temperature make it possible to recover heat for tap water and heating. The excess heat is removed using a gas cooler. Regulation is carried out during transcritical and subcritical states and the controller will control the gas pressure/condensing pressure so that the system achieves the optimum COP when the recovered heat is taken into account. The regulation of the heat recovery circuits is done with regard to the cooling system. In the event of conict, the safety situation is that the cooling system has higher priority than the recovery circuits.
The two heat recovery circuits can be considered as independent circuits - also with regard to the cooling system. First, the circuit for hot tap water will take the energy it needs to use. The remaining energy is then available for use by the next circuit. This also takes what is available. If there is then any excess energy, this is removed via the gas cooler. There must be a cooling requirement in order to supply for heat recovery.
DKRCC.PD.VL0.A.02 | 6
Data sheet | Electric 3-way valve type CTR 20
Application example
Hot water Heat reclaim
AKS
Pump
CTR
CTR Valve provides Modulating operation to ensure smooth transition avoiding too many Compressor on/o when going from Heat reclaim mode to full through Gas Cooler.
In the above example, the 3-way valve switches to enable ow of hot gas to enter heat reclaim heat exchanger. Here heat is transitioned to the water loop hence the Hot Gas is cooled. On the diagram, rst heat is used for Hot Tap water and then with a second 3-way valve heat used for
55 °C 40 °C
AKS
Pump
CTR
CTR
Danfoss 27H432.10
the heating loop for the building, nally a third 3-way valve is mounted to enable by-pass of the gas cooler if that is needed. E.g. in a very cold season, where the pressure would drop too much after recovering all the heat in the plate heat exchangers.
Warning
If the pressure drop in the heat exchanger and connecting pipes are less than 3 bar, the valve can be installed in any way the users likes based on the application. However, if there for some reason is a larger pressure drop than the MOPD of the valve then the right connection of the valve, as shown on the following diagram, is important for safety reasons.
Heat recovery
Danfoss R64-3029.10
If the connections is done as shown in the diagram, then the valve will always be able to go out of heat recovery mode and will always be able to let the gas cooler into operation no matter what pressure drop is in the heat exchanger and piping. Therefore, Danfoss advises that the valve is always installed according to the diagram.
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A.02 | 7
B1
A1
A2
Flow direcon 3 - > 2
K
v
Vs % Opening
Data sheet | Electric 3-way valve type CTR 20
Flow characteristics
30
25
20
15
Value
v
K
10
5
0
Danfoss
27H440.11
5
0
10
20
15
25
35
30
40
50
45
60
55
65
75
70
80
85
Flow direcon 1 - > 3
Flow direcon 3 - > 1
Flow direcon 2 - > 3
95
90
100
Driving CTR valve CTR valve uses a bipolar, 2-phase, permanent magnet stepper motor.
CTR valve 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 correct valve data into the controller setting. The wrong settings may impair the performance of the valve. a. Total no. of step b. Step rate c. Phase current d. Overdriving against closing position
Note:
If the controller driving the CTR 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.
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.
Warning
At power failure the CTR 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.
The following table shows the full step excitation switching
Stepper motor switch sequence
sequence
Coil I (B) Coil II (A)
STEP
Red Green White Black
1 + - + -
CLOSING
2 + - - + 3 - + - + 4 - + + ­1 + - + -
Color code is only valid for Danfoss M12 cable
OPENING
Danfoss cable connections
Pin Wire color
A1 White
A2 Black
B1 Red
B2 Green
Danfoss
B2
34G177.10
CTR valve
1
4
2
3
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A.02 | 8
71 mm / 2.8 in
027H324.10
Dimensions and weight
360 mm / 14.2 in
Danfoss
027H323.10
/ 10.1 in m
256 m
Related products
Electronic driver, type EKD 316 / EKD 316C
in
/ 3.6 in m
92.5 m
54.5 mm / 2.1
53.5 mm / 2.1 in 53.5 mm / 2.1 in
Electronic controller, type EKC 326a and EKC 313
Electronic driver type AK-XM 208C
Danfoss
Weight: Approx. 3.2 kg / 7.05 lbs
AKS 11 / AKS 12 temperature sensor AKS pressure transmitter
© Danfoss | DCS (sw) | 2018.07
DKRCC.PD.VL0.A2.06 | 9
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