16
RIG MACHINE COMPONENTS
Refer to instructions below, Fig. 6-8, and Carrier Certified
Prints for machine component disassembly.
.
NOTE: If the evaporator, economizer, and condenser vessels must
be separated, the heat exchangers should be kept level by placing a
support plate under the tube sheets. The support plate will also
help to keep the vessels level and aligned when the vessels are
bolted back together.
NOTE: Wiring must also be disconnected. Label each wire before
removal (see Carrier Certified Prints). In order to disconnect the
VFD from the machine, remove wiring between the VFD and the
refrigerant pump, control panel, purge power, and the main motor
leads at the starter lugs.
Remove all transducer and sensor wires at the sensor. Clip all
wire ties necessary to pull heat exchangers apart.
NOTE: All factory units have inhibitor in the lubrication assem-
bly. Both bearing supply and HS float chamber ball valves are shut
at factory to contain the inhibitor (see Fig. 9). Should it be required
to remove the lubrication assembly prior to start-up, do not cut any
low piping without prior removal of inhibitor to avoid spilling on
the floor.
To Separate Evaporator and Condenser:
1. Place a support plate under each tube sheet leg to keep
each vessel level.
2. Cut tubing between high side float chamber and motor/
VFD cooling.
3. Cut tubing between high side float chamber and lube
assembly.
4. Disconnect the compressor discharge pipe.
5. Disconnect bolted connection between the low side float
chamber and the evaporator.
6. Disconnect bolted economizer pipe between economizer
and second stage compressor inlet.
7. Cut tubing between purge and compressor volute.
8. Cut tubing between purge regeneration line and motor
drain.
9. Cover all openings.
10. Disconnect all wires and cables that cross from evaporator
side of the machine to the condenser side.
11. Disconnect the marriage brackets connecting the evapora-
tor and condenser tubesheets (both ends).
To Separate the Compressor from the Evaporator:
1. Unbolt motor drain flange.
2. Unbolt suction pipe flange.
3. Unbolt discharge pipe flange.
4. Cut tubing from purge to compressor volute.
5. Disconnect O-ring face seal from bearing drain (near
motor drain).
6. Cut bearing supply tubing from lube assembly.
7. Cut motor cooling supply line tubing from high side float
chamber.
8. Disconnect inhibitor reclaim line running from compres-
sor to near bottom of evaporator.
9. Disconnect all power and control wires connected to the
compressor.
10. Cover all openings
11. Disconnect compressor motor power cables from VFD to
motor.
12. Unbolt compressor mounting from the evaporator.
Additional Notes
1. Use silicone grease on new O-rings when refitting.
2. Use gasket sealant on new gaskets when refitting.
Fig. 6 — 19DV4, Side View
Fig. 7 — 19DV4, Bottom View
IMPORTANT: Only a qualified service technician should
perform this operation.
WARNING
Do not attempt to disconnect flanges or tubing while the
machine is under pressure or contains refrigerant. Failure to
relieve pressure can result in personal injury or damage to
the unit.
CAUTION
Before rigging the compressor, disconnect all wires con-
nected to the control panel to avoid damage to electrical
components.
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