Datasheet
CRCT230 Range of
Electronic Room Thermostats
with Function Switches
Features
CRCT230CO1 C01
• Wide range of application options
• Compact design
• Electronic accuracy
• Wallplate construction
• LED status indicators
This range of thermostats is aimed primarily at the
heating and air conditioning market, where there
is a demand for enhanced functionality. All models
feature diff erent combinations of supplementary
function switches which are accessible to the
user.
CRCT230LS: This thermostat, which can be used
in either heating or cooling systems, incorporates
a manual switch which allows the thermostat
output to be switched off .
CRCT230C3: Designed for use with cooling only
fan coil units, the CRCT230C3 incorporates a
combined system isolation switch and Fan Auto/
Fan Continuous switch. The latter allows the user
to decide if the fan should run continuously or
only when there is a demand for cooling. A second
three position switch allows the user to select one
of three fan speed settings.
CRCT230CO3
CRCT230CO1: Designed for use in twopipe changeover fan coil unit systems, the
CRCT230CO1 incorporates a single speed fan as
well as manual Heating/Cooling (Winter/Summer)
switch which allows the thermostat to operate as
a cooling thermostat in the summer and a heating
thermostat in the winter. A second two position
switch allows the user to turn the thermostat
output off and set the fan to either manual or
automatic mode if so desired.
CRCT230CO3: Designed for use in two-pipe
changeover fan coil unit systems, the CRCT230CO3
incorporates a manual Heating/Off /Cooling
(Winter/Off /Summer) switch which allows the
thermostat to operate as a cooling thermostat
in the summer and a heating thermostat in the
winter. A second three position switch allows the
user to select one of three fan speed settings.
CRCT230H3: Designed for use with heating only
fan coil units, the CRCT230H3 incorporates a
combined system isolation switch and Fan Auto/
Fan Continuous switch. The latter allows the user
to decide if the fan should run continuously or
only when there is a demand for cooling. A second
three position switch allows the user to select one
of three fan speed settings.
Part No. 746v01 08/08
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Datasheet
CRCT230 Electronic Room Thermostat with Switches
Specifi cations Thermostat for use in systems having central changeover from heating to cooling
CRCT230 Electronic Thermostats with function switches CRCT230CO1 CRCT230CO3
Order Codes 082F1505 082F1503
Heating/Cooling thermostat for changeover systems • •
System Off /Auto Selector •
Summer/Off /Winter (Heating/Off /Cooling) selector • (1)
Summer/Winter (Heating/Cooling) selector •
3 speed fan switch output terminals •
Single speed fan output terminal •
Switching Diff erential <1K
Operating Voltage 220/240 Vac, 50/60 Hz
Switch Rating 2 (1) A
Temperature Range 5-30°C
Dimensions (mm) 85 wide x 87 high x 42 deep
(1) Switch label based on symbols
Thermostat for use in non-changeover systems
RET230 Electronic Thermostats with function switches CRCT230H3 CRCT230C3 CRCT230LS
Order Codes 082F1502 082F1501 082F1504
Cooling thermostat •
Heating thermostat •
Heating or Cooling thermostat • (2)
Fan Auto/Continuous switch with system Off selector •
System Off /Auto selector •
Power On and thermostat calling LEDs • •
3 speed fan switch output terminals •
Switching Diff erential <1K
Operating Voltage 220/240 Vac, 50/60 Hz
Switch Rating 2 (1) A
Temperature Range 5-30°C
Dimensions (mm) 85 wide x 87 high x 42 deep
(2) RET230LS has SPDT contacts and can be used in heating or cooling systems
Dimensions
85
3
87 78
42
2
Part No. 746v01 08/08
Datasheet
CRCT230 Electronic Room Thermostat with Switches
CRCT230CO1
CRCT230CO3
SW1 SW2
SW1 SW2
ELECTRONICS
ELECTRONICS
I
L1234
N
230V
N
I
RL
I
>
L1234
N
230V
I
N
SW1
>
RL
SW2
N
N
4
3
0
SW1
SW2
III
II
III
II
N
CRCT230LS
CRCT230C3
SW1
SW1 SW2
ELECTRONICS
N
ELECTRONICS
I
SW1
>
RL
L1234
230V
I
RL
I
>
L1234
N
230V
I
N
0
SW2
0
SW1
SW2
III
II
III
II
N
Part No. 746v01 08/08
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Datasheet
CRCT230 Electronic Room Thermostat with Switches
CRCT230H3
SW1 SW2
ELECTRONICS
I
RL
I
>
L1234
N
230V
I
N
0
SW1
SW2
III
II
III
II
N
Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already
on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Danfoss Randall Ltd.
Ampthill Road
Bedford MK42 9ER
Tel: 0845 1217 400
Fax: 0845 1217 515
Email: danfossrandall@danfoss.com
Website: www.danfoss-randall.co.uk
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Part No. 746v01 08/08
VDEZC102
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