Danfoss CTR 20 Data sheet
Data sheet
Electric 3-way valve
Type CTR 20
The CTR is an electrically operated 3-way valve
designed specically 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 specication
Electrical specication
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
Identication, 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
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