55
Filter Drier — Whenever moisture-liquid indicator shows
presence of moisture, replace filter drier(s). There is one filter
drier assembly on each circuit with two cores. Refer to the Car-
rier Standard Service Techniques Manual, Chapter 1, Refriger-
ants, for details on servicing filter driers.
Liquid Line Service Valve — This valve is located immediately
ahead of filter drier, and has a
1
/
4
-in. access connection for field
charging. In combination with compressor discharge service
valve, each circuit can be pumped down into the high side for
servicing with plate fin coils. Microchannel coils (MCHX)
have much smaller volume and cannot accommodate the entire
circuit charge.
Compressor Assembly — The 30XV units utilize
Greenspeed intelligence for efficient operation. The compres-
sor is controlled by a VFD. See Fig. 50 for a view of a typical
06Z compressor. For optimal efficiency the compressor uses a
variable inlet (VI) valve to change the inlet area of the lobes at
different loading points. The valve is opened or closed by a
solenoid on the compressor. The control logic looks at calcu-
lated parameters to determine the switch point of the valve.
VI VALVE TROUBLESHOOTING — Use the quick test
table (Main Menu Quick Test Table Circuit X VI) to en-
able the VI valve output. Enable the valve output and verify the
coil solenoid is energized.
SUCTION VICTAULIC COUPLING INSTALLATION
1. The outside surface of the pipe, between the groove
and the pipe end, must be smooth and free from inden-
tations, projections (including weld seams), and roll
marks to ensure a leak-tight seal. All oil, grease, loose
paint, and dirt must be removed. The Victaulic gasket
used for refrigerant system piping will have a yellow
mark on one side of the gasket lips.
2. Apply a thin coat of Victaulic lubricant or silicone lubri-
cant to the gasket sealing lips and exterior.
3. Position the gasket over the pipe end. Make sure the gas-
ket does not overhang the pipe end.
4. Align and bring the two pipe ends together. Slide the gas-
ket into position and center it between the grooves in each
pipe end. Make sure no portion of the gasket extends into
the groove in either pipe end.
5. Install the housings over the gasket. Make sure the hous-
ings’ keys engage the grooves completely on both pipe
ends.
6. Install the bolts, and thread a nut finger-tight onto each
bolt. For couplings supplied with stainless steel hardware,
CLOSED
OPEN
CLOSED
OPEN
GASKET
OPEN VALVE IN QUICK TEST SUB-MODE BEFORE DISASSEMBLING
EF05BD271 NV 32.5mm
EF05BD331 NV 36mm
50Nm (36 ft-lb)+ 30°
27mm / 1
1
/
16
''
27mm / 1
1
/
16
''
ADAPTER
NOTES:
1. Push down on valve piston to close valve before assembling.
2. After valve is assembled close valve in Quick Test sub-mode or cycle power before opening service valve.
Fig. 49 — Disassembly and Assembly of EXV Motor
a30-4072
DISASSEMBLY
ASSEMBLY
CAUTION
Always use a compatible lubricant to prevent the gasket
from pinching or tearing during installation. Failure to fol-
low this instruction could result in joint leakage.
CAUTION
Make sure the gasket does not become rolled or pinched
while installing the housings. Failure to follow this instruc-
tion could cause damage to the gasket, resulting in joint
leakage.
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