Instruction Manual
4875 Power Controller
Parr Instrument Company
6
ge n e r a l  sP ec I f I ca t Io n s
Electrical Ratings
115VAC 50/60 Hz 15.0 Amps
230VAC 50/60 Hz 15.0 Amps
Before connecting to a reactor or heating device, 
the user must be sure that the line, load and other 
characteristics of the installation do not exceed the 
following limits:
Voltage: Fluctuations in the line voltage should not 
exceed 10% of the rated nominal supply voltage shown 
on the data plate.
Frequency: Controllers can be operated from either 
a 50 or 60 Hertz power supply without affecting their 
operation or calibration. 
Current: The total current drawn should not exceed 
the rating shown on the data plate on the controller by 
more than 10 percent.
en v I r o n m e n t a l  co n d I t I o n s
This instrument is to be used indoors and requires 3 
square feet of space below the controller in a well-
ventilated area with convenient access to an electric 
outlet. 
Operating: 15 ºC to 35 ºC; maximum relative humidity 
of 80% non-condensing. Installation Category II (over 
voltage) in accordance with IEC 664.   
Pollution degree 2 in accordance with IEC 664.   
Altitude Limit: 2,000 meters.
Storage: -25 ºC and 65 ºC; 10% to 85% relative 
humidity.
  Provisions for Lifting and Carrying
Before moving the instrument, disconnect all 
connections from the rear of the apparatus. Lift the 
instrument by grabbing underneath each corner.
Caution!
Do not use in hazardous atmospheres.










