Guardian Technologies SCR-A User Manual

 

Page 7 

 

 

 

•  SCR-A telephones shall be installed by qualified service personnel. 

•  Follow all appropriate electrical codes and use only approved electrical 

fittings for the installation. 

•  Choose a wall location that is free of obstructions and permits space for ½” 

NPT conduit runs. 

•  Ensure mounting can support 4 lbs. (1.8 kg) and any additional foreseeable 

load. 

•  Remove the eight (8) cover screws from the front of the unit and carefully 

remove the front cover assembly.  NOTE that the handset and all 
electronics are attached to the front plate.  The front cover may be 
separated from the back box by disconnecting the harness plugs. 

•  Attach the back box to the wall at the desired location using four (4) #8 

screws.  If weather resistance is important in your application select 
washers that will assist in sealing the mounting holes. 

•  Install a suitable conduit hub or cable gland in the cable entrance hole at the 

bottom of the unit. 

•  Connect an approved earth ground to the terminal block. 
•  Bring cable into the enclosure through the cable entrance and attach 

individual wires from the exchange – Tip/Ring/Ground – to the surge 
arrestor (Tip & Ring are not polarity sensitive). 

to a protective earth system. 

 

•  Apply power to the system. 

•  Test the unit by calling to and from another unit on the exchange. 

 
 
 

•  The SCR-A Ringdown/Autodialer phone is designed for automatic calling 

simply by removing the handset from the cradle.