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Room reset controller
FEATURES
• Easy to install and commission
• Shipped with typical default
values, reducing commissioning
time
• Quick set mode allows basic
settings to be easily checked
and set
• Simple override switch
• Night Set Back (NSB), set-up,
summer and night sensor selection
switched inputs
• Optional night sensor to protect
heater battery from frost damage
• Up to 4 room sensors can be used
for average room temperature
• Remote setting input for room
set value
• Cost effective upgrade of obsolete
Climatronic controllers
• Compatible with previously
installed Satchwell sensors
Stand-alone
Controllers
Satchwell Product Catalogue – Stand-alone Controllers – Room reset controller
6
CXR
AHU Room Reset Controller
The CXR Controller is used to control room temperature by resetting the supply duct
air temperature. The room sensor resets the duct supply temperature to achieve
the desired room temperature. The room temperature can be sensed in the room or
extract duct. The supply duct loop has a purely proportional control action with the
room reset being a proportional plus integral control action.
Control
Output
CXR 5805
Single, two or three stage 24V actuator control
Data Sheet 2.110
INSTALLATION DETAILS
Power supply:
230Vac 50/60Hz
Power failure reserve:
settings stored in memory, 1 year battery for clock
Protection class:
IP 30
Switched Inputs
Night Set Back (NSB): remote voltage free, make/break contacts. Normally closed.
Set Up: Voltage free, make/break contacts. Normally closed.
Remote Low Limit (Summer): remote voltage free, make/break contacts.
Normally closed.
Night Sensor Selection: Voltage free, make/break contacts. Normally closed.
Outputs
Valve Actuator Output Triacs: 2 x 24Vac triacs, 1A
(0V switched and software interlocked).
Output Supply: 2 x 24Vac terminals used to power the actuator up to a total
of 10VA maximum.
SensorS
Current Sensor
Type
Replaces
STR602
Space
DRT 3651
STR600
Space
DRT 3453
STD660
Duct
DDT 0001
STP660
Water (Immersion)
DWT 0001
STC600
Water (Strap on)
DST 0001
STR602
Remote setting
RPW 4425