Digital Display Thermostat SF-104 Temperature Controller Intelligent Regulator

Description

Digital Display Thermostat SF-104 Temperature Controller Intelligent Regulator
Model: digital thermostat (frozen) SF-104
Measuring temperature display range: -45 ~ 45oC
Measurement accuracy: ± 1 oC
Overall dimensions (mm): 77mm (length) x 35mm (width) x 60mm (D)
Working environment: -10 ~ 60 oC;
Relative Humidity: 20% to 90% (no condensation)
Temperature control, and an evaporator fan control
Defrost heating wire control
Automatic / manual electric defrost
Time / temperature terminated defrost
Compressor delay start
Compressor relay: 20A/1HP
Parameter lock, self-diagnosis
Key operation to restore the factory values
Suitable for air-cooled cryogenic freezers, cold storage
Temperature sensing probe: two, 2 meters long
Compressor: normally open 20A/250VAC
Defrost heating wire: normally open 10A/250VAC
Evaporator fan: normally open 5A/250VAC
Features
& Small type integrated intelligent control, direct control of 1P or less (including 1P) compressors.
& Temperature Display / Temperature Control / Manual, automatic defrost heater / evaporator fan control / time, temperature terminated defrost / Set Memory / Parameter Lock / self-diagnosis
Technical parameters
1, external sealed transformer output: AC 12V (a transformer can be equipped with a temperature controller)
2, the temperature probe: NTC, 2 amended (storage temperature, defrost control) 2 m long (regardless of sign)
3, the temperature display range: -45~ 66 oC (-45 ~ 150 oF) Accuracy ± 1oC (± 2 oF)
4, the control temperature range: -45 ~ 45 oC (-45 ~ 120 oF) Default: 0oC (32 oF)
5, Dimension: 77x35x60mm, hole size: 71x29mm
6, the working environment temperature: -10 ~ 60 oC (14 ~ 140 oF); relative humidity 20% ~ 90% (no condensation)
7, the relay contact capacity:
& Compressors: normally open 20A/250VAC (a compressor can be used directly over to pick AC contactor)
& Defrost heating wire: normally open 10A/250VAC (1KW load can be used directly over to pick AC contactor)
& Evaporator fan: normally open 5A/250VAC
Panel Operation
Press the "SET" 6 seconds to enter the parameter setting
Press the "defrost" button for 6 seconds, into defrost or stop defrost
Press the "UP" button 6 seconds defrost probe temperature display
E1 Lowest  temperature: -45oC /-45oF ~ control the temperature,the factory value of -35oC /-31oF;
E2 Highest temperature: control temperature~45oC /120oF, the factory value of 20oC / 68oF;
E3 Temperature return difference: 1 ~ 10 oC / 1~18oF, the factory value of 4 oC / 7oF;
E4 Delay start-up time from 0 ~ 10minutes,the factory value of 2 minutes;
E5 Warehouse temperature probe calibration: -20 ~ 20 oC / -36 ~ 36oF , the factory value of 0 ;
E6 Defrost  probe calibration: -20 ~ 20 oC / -36 ~ 36oF, the factory value of 0 ;
F1 Defrost time: 1~ 60 minutes, the factory value of 20 minutes;
F2 Defrost interval: 1 ~24 hours, the factory value of 6 hours;
F3 Defrost termination temperature: 0 ~40 oC / 32-104oF ,the factory value of 8 oC/46 oF
F4 Defrost temperature display: 0 = normal warehouse temperature display, 1 = defrost start temperature display;
F5 Fan Control,0 = compressor synchronization, 1 = has been running (defrost except)
C1 Temperature Units
0=Degrees Celsius
1=Degrees Fahrenheit
Function Description
1, temperature control
& Compressor after a brief delay, when the storage temperature is greater than (control temperature + temperature hysteresis), the compressor starts; storage temperature is less than the control temperature, the compressor stops.
& To protect the compressor, the compressor stops each time must be longer than the delay time (E4 parameters) to restart.
2, electric defrost function:
& Only defrost defrost termination probe temperature less than the temperature (F3 parameter) to enter when defrosting, turn the heating wire.
& Operating a defrost interval automatically enter the defrost state. If defrost defrost termination probe temperature is lower than the temperature, defrost indicator light, the compressor stops, the heating wire work, evaporator fan stops.
& When the defrost probe temperature is higher than defrost termination temperature; or time to defrost, then launch defrost, heating wire to stop working, after two minutes after drip into normal temperature patterns, such as the storage temperature is greater than (control temperature + temperature hysteresis) compressor starts, one minute after the evaporator fan is working.
& When the defrost interval is set to "00", canceled Automatic defrost function.
3, defrost locked storage temperature display:
When setting parameters F4 = 1, the lock in the project defrost inside temperature, shows defrost start temperature. After defrosting, storage temperature display delayed 20 minutes (or to control temperature) only after the return to normal display, delay the process of defrosting lights flashing.
4, non-normal operating mode:
& Thermostat probe short circuit or high temperature gauge (greater than 66/150) display "HH"; storage temperature probe open or low overrun (less than -45/-45) show "LL". Time to enter the timer mode, the compressor run for 30 minutes, stop for 15 minutes.
& Defrost probe short circuit, open circuit or overload, terminate defrost, limited only by the defrost time control.
Installation Precautions
1, in order to prevent high-frequency interference, the probe cable in conjunction with power lines or control line bundle, to separate the wiring. 12V low-voltage lines can not be parallel with the high-voltage wiring.
2, the probe should be installed head-on, the line down; defrost probe should be placed in a metal film evaporator where the thickest ice, and can not be close to the heating wire.
3, such as the installation requires, extend the probe line up to 100 m, without re-examination.
4, the thermostat can not install a drip place.
Packing list:
External transformer X1
Temperature probe X2
Mounting bracket X1
Baffle X1
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