Parallel Condensing Units
On parallel condensing units, temperature control is typically provided by an EPR valve.
Evaporator Pressure Regulator (EPR) Valve
The EPR valve can be used to control case temperature. This is accomplished by adjusting the
valve to the desired flow to maintain the case temperature. Refer to manual 31E08001,
Installation and Operation Manual for Parallel Compressor Units, for a complete explanation of
the expansion valve.
Thermostat and Liquid Line Solenoid
The thermostat and liquid line solenoid can be used to control case temperature. This is
accomplished by adjusting the liquid flow rate based on the case temperature. Refer to manual
31E08001, Installation and Operation Manual for Parallel Compressor Units, for a complete
explanation of the thermostat and liquid line solenoid.
Solid State Low Pressure Switches on Compressor
When installed on the compressor, these switches are used to control case temperature. Refer to
manual 31E08001, Installation and Operation Manual for Parallel Compressor Units, for a
complete explanation of the solid state low pressure switches on the compressor.
Electrical
The following paragraphs explain the case electrical requirements and connections required for
proper case operation.
NEC and Local Code Compliance
Caution:
Ensure all National Electric Codes (NEC) and local electric codes are
understood and followed. Failure to follow all existing codes may result in equipment
damage and may void the equipment warranty.
All field installed wiring must comply with the National Electric Codes (NEC) and local codes.
Before installing any wiring, verify that all NEC and local codes are understood and properly
followed.
Electrical
Raceway
An electrical raceway is provided with each case for wiring your fan, anti-sweat heaters, and
light circuits for case to case without using conduit. This applies, of course, when the front
bumper is properly secured into position. This is an approved method by the Underwriters
Laboratories however, must be in accordance with local and national electrical codes.
UNIT INSTALLATION
30
Summary of Contents for 6RLG3
Page 3: ...2 6 2006 2 Addendum Ballast Relocation 2 ...
Page 5: ...2 6 2006 4 Addendum Ballast Relocation Wiring Diagram Both Canopy and Raceway 4 ...
Page 6: ...2 6 2006 5 Addendum Ballast Relocation Wiring Diagram for Canopy Light 5 ...
Page 9: ...Plan Views and Cross Sections D6L D6 D6H 8 ...
Page 10: ...D6RL D6R 9 ...
Page 11: ...QD6 10 ...
Page 34: ...D6 Electrical Model Table QD6 1 3 04 Through D6H 1 3 6 UNIT INSTALLATION 33 ...
Page 35: ...D6 Electrical Model Table D6H 1 3 6 Through D6R 1 3 4 UNIT INSTALLATION 34 ...
Page 36: ...D6 Electrical Model Table D6R 1 3 4 Through D6RL G 1 6 UNIT INSTALLATION 35 ...
Page 39: ...Wiring Diagram UNIT INSTALLATION 38 ...
Page 40: ...Wiring Diagram Canopy One 1 and Two 2 Light Rows UNIT INSTALLATION 39 ...
Page 41: ...Wiring Diagram Canopy Two 2 and Three 3 Light Rows UNIT INSTALLATION 40 ...
Page 42: ...Wiring Diagram Canopy Two 2 Light Rows and Nose Light UNIT INSTALLATION 41 ...
Page 43: ...Wiring Diagram Off Cycle Defrost UNIT INSTALLATION 42 ...