York YCIV Series, Installation Operation & Maintenance

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JOHNSON CONTROLS
45
SECTION 5 - COMMISSIONING
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
5
Equipment Pre Start-up and Start-up Checklist
JOHNSON CONTROLS
1
CHECKLIST
MODEL YCIV
New Release
Form 201.23-CL2 (115)
EQUIPMENT PRE-STARTUP AND STARTUP CHECKLIST
The following work must be completed in accordance with installation instructions:
CUSTOMER: ____________________________________
ADDRESS: _____________________________________
PHONE: ________________________________________
JCI TEL NO: _____________________ JCI ORDER NO: __________________ JCI CONTRACT NO: ______________
JOB NAME: ____________________________________
LOCATION: ____________________________________
CUSTOMER ORDER NO: _________________________
CHILLER MODEL NO : ____________________________
The work (as checked below) is in process and will be completed by: _____________ / ____________ /
___________
UNIT SERIAL NO : _______________________________
Month Day Year
Oil levels in single separator systems should not go
above the top of the upper sight glass. Dual separator
systems should also not show oil levels above the top
of one of the sight glasses. In the rare situation where
oil levels are high, drain enough oil to lower the level to
the bottom of the top sight glass.
Sight glasses will vary in type depending upon the
manufacturer of the separator. One type will have balls
that float in the sight glasses to indicate level. Another
type will have a bulls' eye glass. The bulls' eye glass
will tend to appear to lose the lines in the bulls' eye
when the level is above the glass. Oil level should not
be above the top sight glass. In the rare situation where
oil levels are high, drain oil to lower the level to the bot-
tom of the top sight glass.
Oil levels in the oil separators above the top sight glass
in either oil separator should be avoided and may
cause excessive oil carryover in the system. High oil
concentration in the system may cause nuisance trips
resulting from incorrect readings on the level sensor
and temperature sensors. Temperature sensor errors
may result in poor refrigerant control and liquid over-
feed to the compressor.
In the unlikely event it is necessary to add oil, con-
nect a YORK oil pump to the charging valve on the oil
separator, but do not tighten the flare nut on the deliv -
ery 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.
CAUTION: When oil levels are high, adding oil may not
visibly increase the level in the separators during oper-
ation. This may be an indication the level is already too
high and the oil is being pumped out into the system
where it will cause heat transfer and control problems.
PRE-STARTUP
UNIT CHECKS (NO POWER)
The following basic checks should be made with the cus-
tomer power to the unit switched OFF.
WARNING: Proper electrical lock out and tag procedures
must be followed.
Check the system 24 hours prior to initial start:
1. Inspect the unit for shipping or installation
damage. ..................................................................
2. Ensure that all piping has been completed. ............
3. Assure the unit is properly charged and there are
no piping leaks. .......................................................
4. Open each system suction service valve, dis-
charge service valve, economizer service valve,
liquid line stop valve, and oil line ball valve. ............
5. The oil separator oil level(s) should be main-
tained so that an oil level is visible in either of the
oil separator sight glasses when a compressor is
running at high speeds for 10 to 15 minutes. An
oil level may not be visible in the sight glasses
when the compressor is off and it may be neces-
sary to run the compressor to obtain a level. In
shutdown situations and at some load points,
much of the oil may be in the condenser and the
level in the separators may fall below the bottom
sight glass. ..............................................................
On systems with dual oil separators per compressor,
one separator may show a lower level or no level, while
the other separator shows a level between the 2 sight
glasses. This is normal and a level is only required in
one separator. Do not add oil to raise the level in the
other oil separator.