Barker AGB, Installation & Operation Manual

CASE CONNECTIONS

REFRIGERATION

Refrigeration connections will be made through the refrigera-
tion stub up location on the customer left side of the case.   
Refrigeration lines may be headed together for all cases in a 
line-up, if necessary, by lines through the access holes with a 
high grade silicon to prevent recirculation.  All lines must be 
correctly sized. 

See diagram on page 9 for access locations.

If it becomes necessary to penetrate the case bottom for any 
reason, make certain it is sealed afterward with canned-foam 
sealant and white RTV.

ELECTRICAL

Electrical hookups are made through the power supply box 
that can be accessed by removing the back panel.

For case-to-case wiring, run conduit between the power supply 
boxes or run wiring through the raceway.  When connecting to 
the po

wer supply on the case, fi eld wiring should exit box from 

the side furthest away from case wiring to allow more room in-
side for wiring connections.  Always check the data tag located 
on left end exterior panel or top interior of the case.  The case 
must be grounded.  

For more detailed electrical wiring infor-

mation, see Appendices A1-A2.

C A U T I O N

Be certain that all plumbing connections are 
compliant with local codes.

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C A U T I O N

Be certain that all electrical connections are 
compliant with local codes.

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C A U T I O N

Be sure to remove all styrafoam shipping blocks 
from piping and refrigerant lines.  Failure to do 
so may result in case damage.

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Fig. 4  "P" trap / drain outlet

PLUMBING

The drain outlet or “P” trap (Fig. 4) is shipped loose with the 
case and made from a 1 1/2” PVC pipe. Care should be given 
to ensure that all connections are water-tight and sealed with 
the appropriate PVC or ABS cement.

Drain lines can be run left or right of the tee with the proper 
pitch to satisfy local drainage requirements.  When connecting 
the PVC to the e

xisting fl oor drains be sure to provide as much 

downhill slope as possible and avoid long runs of drain lines.  

Do not install condensate drains in contact with non-insulated 
suction lines in order to prevent condensate from freezing.  
Install the 1 1/2" PVC trap, which is provided with the case.  All 
drains must be trapped.

Before operating the case, be certain to remove the styrafoam 
shipping block that protects the plumbing lines during ship-
ping.

C A U T I O N

If any brazing is necessary, place wet rags 
around the area to avoid tank damage.

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C A U T I O N

Be certain that all piping connections are com-
pliant with local codes.

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C A U T I O N

If the shelves are removed from the case or other-
wise not utilized, the shelf setpoint (SAA) must be 
raised  to 90 

o

F  to prevent the pump from running 

when only the shelves are calling for refrigeration.  
Failure to do so could result in early pump failure.

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