Vilter VSM 71-701, Руководство по эксплуатации и обслуживанию

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Installation
I. DELIVERY INSPECTION
Vilter screw compressor components are thor-
oughly inspected at the factory, assuring the ship-
ment of a mechanically perfect piece of equip-
ment. Damage can occur in shipment, however.
For this reason, the units should be thoroughly
inspected upon arrival. Any damage noted should
be reported immediately to the transportation com-
pany. This way, an authorized agent can exam-
ine the unit, determine the extent of damage and
take necessary steps to rectify the claim with no
serious or costly delays. At the same time, the
local Vilter representative or the home office
should be notified of any claim made.
TABLE 1. UNIT WEIGHTS
MODEL STANDARD ECON-O-MIZER
UNIT (LBS)* UNIT (LBS)*
VSM 71 2,750 2,750
VSM 91 2,750 2,750
VSM 101 2,750 2,750
VSM 151 2,750 2,750
VSM 181 2,750 2,750
VSM 201 2,750 2,750
VSM 301 2,850 2,850
VSM 361 2,850 2,850
VSM 401 2,850 2,850
VSM 501 4,000 4,000
VSM 601 4,500 4,500
VSM 701 5,000 5,000
VSS 451 4,000 4,000
VSS 601 4,500 4,500
VSS 751 5,300 5,300
VSS 901 5,300 5,300
VSS 1051 6,600 6,600
VSS 1201 6,700 6,700
VSS 1501 10,010 10,010
VSS 1801 10,010 10,010
* Does not include motor.
II. FOUNDATIONS
Vilter single screw compressor units are basically
vibration free machines, therefore, no elaborate
foundations are necessary. The floor or founda-
tion upon which the unit will be placed should be
designed to support the entire operating weight
of the unit. See Table 1 for unit weights.
III. LOCATING UNIT - DRIVE
COUPLING ALIGNMENT
The single screw compressor units are shipped
with all major components mounted on struc-
tural steel. Place the entire unit on the floor on a
concrete pad and securely bolt in place. Review
local codes and ASHRAE Safety Code for Me-
chanical Refrigeration. Bolt holes are located
in the unit’s mounting feet. When locating the
unit, provide adequate space for service work.
When the compressor unit is in place on the con-
crete pad, check both lengthwise and crosswise
to assure it is level. Use shims and wedges as
needed under the mounting feet to adjust the level
of the unit.
On single screw units, the motor and compres-
sor have been roughly aligned at the factory. The
coupling center section was shipped loose to al-
low a check of proper electrical phasing, direc-
tion of rotation of the motor and final coupling
alignment. The dial indicator alignment method
is recommended. Final alignment should be
within 0.004 inches total indicator reading in
all direction for the VSS models and 0.010 inches
for the VSM models.
IV. SYSTEM PIPING
Refer to the ANSI/ASME B31.5 Code for Re-
frigeration Piping. All compressor oil supply and
oil return piping has been completed at the fac-
tory. The necessary connections to be made to
the screw compressor unit will vary depending
on the type of oil cooling method purchased.
Main line refrigerant suction and discharge con-
nections are always necessary.
Care must be taken to avoid trapping the lines
except for specific purposes. When traps are
used, the horizontal dimensions should be as
short as possible to avoid excessive oil trapping.
Lines for ammonia systems must be of steel pipe
with specially designed ammonia service fittings.
Common pipe fittings must NEVER be used as
they will not provide the same service. Steel pipe
is generally used in large installations when joints
are welded.