
Refrigeration Service Operations
140
IMPORTANT: This unit uses micro-channel
condenser coils. Micro-channel coils are
make of aluminum but have copper stub
tubes at the inlet and outlet connections.
Make sure to use a heat sink on the copper
stub tubes to prevent damage to the heat
shrink tubing and brazed connections (and
the aluminum) that attached the copper stub
tubes to the aluminum micro-channel coil.
The heat shrink tubing is used to prevent
corrosion between the copper and aluminum.
4. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
5. Close the curbside condenser grille and top
door.
6. Recharge the unit with proper refrigerant and
check the compressor oil.
Roadside Condenser Coil
Removal
1. Recover the refrigerant charge.
2. Open the top door and roadside condenser
grille.
3. Unsolder the inlet and outlet refrigeration line
connections from the copper stub tubes on the
micro-channel condenser coil. Make sure to
use a heat sink on the copper stub tubes.
IMPORTANT: This unit uses micro-channel
condenser coils. Micro-channel coils are
make of aluminum but have copper stub
tubes at the inlet and outlet connections.
Make sure to use a heat sink on the copper
stub tubes to prevent damage to the heat
shrink tubing and brazed connections (and
the aluminum) that attached the copper stub
tubes to the aluminum micro-channel coil.
The heat shrink tubing is used to prevent
corrosion between the copper and aluminum.
4. Remove the condenser coil mounting bolts
and lift the coil from the unit.
Installation
1. Clean the fittings for soldering.
2. Place the coil in the unit and install the
mounting bolts.
3. Solder the inlet and outlet refrigeration line
connections to the copper stub tubes on the
micro-channel condenser coil. Make sure to
use a heat sink on the copper stub tubes.
IMPORTANT: This unit uses micro-channel
condenser coils. Micro-channel coils are
make of aluminum but have copper stub
tubes at the inlet and outlet connections.
Make sure to use a heat sink on the copper
stub tubes to prevent damage to the heat
shrink tubing and brazed connections (and
the aluminum) that attached the copper stub
tubes to the aluminum micro-channel coil.
The heat shrink tubing is used to prevent
corrosion between the copper and aluminum.
4. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
5. Close the roadside condenser grille and top
door.
6. Recharge the unit with proper refrigerant and
check the compressor oil.
Radiator Coil
NOTE: The roadside condenser coil must be
removed to remove the radiator coil.
Removal
1. Recover the refrigerant charge.
2. Open the top door and roadside condenser
grille.
3. Drain engine coolant from the unit.
4. Drain engine coolant from the expansion tank.
5. Remove the roadside condenser coil. See
“Roadside Condenser Coil” on page 140 for
the removal procedure.
6. Disconnect the coolant hoses from the radiator
coil.
7. Remove the radiator coil mounting bolts and
lift the radiator coil from the unit.