York MILLENIUM YCAS Series, Установка, эксплуатация и обслуживание, Страница: 93 / 156

93
YORK INTERNATIONAL
FORM 201.18-NM6
SYSTEM STARTUP CHECKLIST
level should always be maintained, running or
not, above the bottom of the lower sight glass
and below the top of the upper sight glass.
If it is necessary to add oil, connect a YORK oil
pump to the charging valve on the oil separator,
but do not tighten the flare nut on the delivery
tubing. With the bottom (suction end) of the
pump submerged in oil to avoid entrance of air,
operate the pump until oil drips from the flare
nut joint, allowing the air to be expelled, and
tighten the flare nut. Open the compressor oil
charging valve and pump in oil until it reaches
the proper level as described above.
$
6. Assure water pumps are on. Check and adjust
water pump flow rate and pressure drop across
the cooler.
Excessive flow may cause catastrophic
damage to the evaporator.
$
7. Check the control panel to assure it is free of
foreign material (wires, metal chips, etc.).
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8. Visually inspect wiring (power and control). Wir-
ing MUST meet N.E.C. and local codes. See
Fig. 8 and 9, pages 33 and 34.
$
9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors and
inside the motor terminal boxes.
$
10.Check for proper size fuses in main and control
circuits.
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11.Verify that field wiring matches the 3-phase
power requirements of the compressor. See
chiller nameplate (Pages 23 - 24).
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12.Assure 115VAC Control Power has 30A mini-
mum capacity. See Fig. 13, page 38.
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13.Be certain all water temp sensors are inserted
completely in their respective wells and are
coated with heat conductive compound.
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14. Assure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock posi-
tions.
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15. Assure that the 15 ton economizer TXV bulbs
are strapped onto the compressor economizer
supply lines at 4 or 8 o’clock positions.
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: _______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
CHILLER MODEL #: _______________________
SERIAL #: ________________________________
COMPRESSOR #1
MODEL#: ________________________________
SERIAL #: ________________________________
COMPRESSOR #2
MODEL#: ________________________________
SERIAL #: ________________________________
Unit Checks (No Power)
Check the system 24 hours prior to initial start
$
1. Inspect the unit for shipping or installation
damage.
$
2. Assure that all piping has been completed.
$
3. Check that the unit is properly charged and that
there are no piping leaks.
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4. Open each compressor suction service valve,
discharge service valve, economizer service
valve, liquid line stop valve, and oil line ball valves.
$
5. The compressor oil level should be maintained
so that an oil level is visible in either of the two
oil separator sight glasses. In other words, oil
7
In actual operation, due to splashing,
an oil level may be seen in both sight
glasses. Run the compressor for a few
minutes, shut the system down, and as-
sure there is an oil level showing in
the bottom or top sight glass with the
compressor off.