Hussmann Ingersoll Rand, User Manual

Page: 311 / 346

Hussmann Aftermarket 1/13/06 Page 3 of 19
Figure 2
1. Turn off control power and main power to the compressor. Check both the control circuit
and the main power from the compressor breaker with a meter to insure the power has been
disconnected.
2. Disconnect and remove all wires from the compressor terminal box.
NOTE : tag control wires for identification to the controls . (See figure 36, page 16 to
determine the wires that need to be marked.)
3. Close suction and discharge valves. Close oil supply line and any equalizing lines.
Evacuate refrigerant from compressor using approved recovery methods. Disconnect the
discharge valve at the Roto-Lock adapter leaving the adapter flange attached to the
compressor. Disconnect the suction valve using a ¾” wrench. Disconnect all remaining lines
from the compressor.
4. Remove all components that are attached to or obstructing the removal of the
compressor, such as head fans, oil failure, high and low pressure controls.
5. IMPORTANT: Count the number of spacer washers between the compressor feet
and the mounting plate. The same number of washers must be used when installing
the IMPACT
™
IR4C compressor.
6. Remove the compressor.
7. Remove all fittings that will be required for installation of the IMPACT
™ IR4C
compressor. Remove oil float by tilting the compressor away from the oil sight glass. Unbolt
the oil float assembly, leaving the compressor tilted until the sight glass from the
IR4C
can
be installed on the 3D compressor.
Instructions for Removing the Copeland
3D Compressor