Defrost / Freezer / Cold Room Controller ...
   
 
SZ 7520P (Temperature Controller with Time Based Defrost)
     
Main Features Cooling output & Time based Defrost.
  Memory retention, time delay for compressor protection.
  Auto operation incase of sensor error.
 
Input & Output Relay output : 8(3)A.
  Temp. Sensor Input : 1 NTC.
 
Application

Freezers.
 
General Temperature range -50C to +99C.
Specification 230VAC Standard. Other models with 12VDC, 24VDC, 110VAC on request.
  Panel cutout : 29 X 71 mm Screw terminals : Admit 1X 2.5 mm2 wire.
 
   
   
  SZ 7521P  (Temperature Controller for Air Dryer & Freezers)
   


 
Manual / Wiring Diagram

 

Main Features Cooling output & Time based Defrost.
  Memory retention, time delay for compressor protection.
  Auto operation incase of sensor error.
  Time based signal for auto drain valve.
  Defrost time / Drain valve signal selectable in minutes & seconds.
 
Input & Output Relay output : 8(3)A for cooling.
  Relay output : 5A for Heater, Hotgas and Auto Drain Valve.
  Temp. Sensor Input : 1 NTC.
 
Application

Air dryer & freezers.

 
General Temperature range -50C to 99C.
Specification 230VAC Standard. Other models with 12VDC, 24VDC, 110VAC on request.
  Panel cutout : 29 X 71 mm. Screw terminals : Admit 1X 2.5 mm2 wire.
   
   
  SZ 7525P (Time Based Defrost Controller with Buzzer)
 


 
Manual / Wiring Diagram
 


 

Main Features Cooling output & time based Defrost.
  Memory retention, time delay for compressor protection.
  Auto operation incase of sensor error.
  Buzzer output.
 
Input & Output Relay output : 8(3)A.
  Buzzer output :10VDC, 10mA Max.
  Temp. Sensor Input : 1 NTC.
 
Application

Deepfreezer.

 
General Temperature range -50C to +99C.
Specification 230VAC Standard. Other models with 12VDC, 24VDC, 110VAC on request.
  Panel cutout : 29 X 71 mm Screw terminals : Admit 1X 2.5 mm2 wire.
   
   
  SZ 7529P (Time Based Defrost Controller with 20Amp Relay)
 


 
Manual / Wiring Diagram
 


 

Main Features Cooling output & Time based Defrost.
  Memory retention, time delay for compressor protection.
  Auto operation incase of sensor error.
 
Input & Output Relay output : 20A (Inductive).
  Temp. Sensor Input : 1 NTC.
 
Application

Deepfreezer.

 
General

Temperature range -50C to +99C.

Specification 230VAC Standard. Other models with 12VDC, 24VDC, 110VAC on request.
  Panel cutout : 29 X 71 mm Screw terminals : Admit 1X 2.5 mm2 wire.
  Spade terminals for compressors.
 
   
   
  SZ 7522P (Freezer Controller)
 


 
Manual / Wiring Diagram
 


 

Main Features Cooling output.
  Digital input for Door Switch.
  Relay output : Heater & Compressor.
  Auto/Manual defrosting facility (Time/ Temp based).
 
Input & Output Relay Output 1 : 8(3)A Compressor.
  Relay Output 2 : 5A Heater.
  Temp. Sensor Input : 2 NTC (Room & Evap. Coil).
 
Application

Freezer and cold room.
 
General Room Temperature range -50C to +99C.
Specification Coil Temperature range -50C to +50C.
  230VAC Standard. Other models with 12VDC, 24VDC, 110VAC on request.
 

Panel cutout : 29 X 71 mm Screw terminals : Admit 1X 2.5 mm2 wire.
   
   
  SZ 7523P (Freezer Controller with 20Amp Relay)
 


 
Manual / Wiring Diagram
 


 

Main Features Digital input for Pressure Cutout.
  Relay output : Compressor + Heater + Evap. Fan.
  HP/LP/OSS trip protection for compressor.
  Compressor protection algoriithm.
  Auto/Man defrosting facility (Time/ Temp based).
 
Input & Output Relay Output 1 & 2 : 8(3)A for Heater & Evap. Fan
  Relay Output 3 : 20A Compressor
  Temp. Sensor Input : 2 NTC (Room & Evap. Coil).
 
Application

Freezer and cold room.
 
General

Temperature range -50C to 50C.
Specification 10VAC/DC Standard.
  Panel cutout : 29 X 71 mm Screw terminals : Admit 1X 2.5 mm2 wire.
 
   

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