SERVICE POLICY & PROCEDURES
YCIV
0590-1500 50Hz & 0157-0397 60Hz
StaRt-UP CHECkLISt
Supersedes: Nothing
Form 201.23-CL1 (309)
COmmISSIOnIng
PREPaRatIOn
Commissioning of this unit should only
be carried out by Johnson Controls
Authorized personnel.
Commissioning personnel should be thoroughly familiar
with the information contained in this literature.
Perform the commissioning using the detailed checks
outlined in the EQUIPMENT START-UP CHECK as
the commissioning procedure is carried out.
PREPaRatIOn – gEnERaL
The following basic checks should be made with the
customer power to the unit switched OFF.
Proper electrical lock out and tag pro-
cedures must be followed.
Inspection
Inspect unit for installation damage. If found, take
action and/or repair as appropriate.
Refrigerant Charge
Packaged units are normally shipped as standard with a
full refrigerant operating charge. Check that refrigerant
pressure is present in both systems and that no leaks
are apparent. If no pressure is present, a leak test
must be undertaken, the leak(s) located and repaired.
Remote systems and units are supplied with a nitrogen
holding charge. These systems must be evacuated with
a suitable vacuum pump/recovery unit as appropriate
to below 500 microns.
Do not liquid charge with static water in the cooler.
Care must also be taken to liquid charge slowly to avoid
excessive thermal stress at the charging point. Once the
vacuum is broken, charge into the condenser coils with
the full operating charge as given in the Technical Data
Section.
Service and Oil Line Valves
Open each compressor suction, economizer, and
discharge service valve. If valves are of the back-seat
type, open them fully (counterclockwise) then close one
turn of the stem to ensure operating pressure is fed to
pressure transducers. Open the liquid line service valve
and oil return line ball valve fully in each system.
Compressor Oil
To add oil to a circuit - connect a YORK hand oil pump
(Part No. 470-10654-000) to the 1/4” oil charging
valve on the oil separator piping with a length of clean
hose or copper line, but do not tighten the flare nut.
Using clean oil of the correct type (“L” oil), pump
oil until all air has been purged from the hose then
tighten the nut. Stroke the oil pump to add oil to the oil
system. The oil level should be between the middle of
the lower and middle of the upper sight glasses of the
oil separator. Approximately 4-5 gallons is present in
the each refrigerant system, with typically 1-2 gallons
in each oil separator. 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 liquid
control and resultant liquid overfeed and subsequent
damage to the compressor.
Fans
Check that all fans are free to rotate and are not
damaged. Ensure blades are at the same height when
rotated. Ensure fan guards are securely fixed.