YORK INTERNATIONAL
60
FORM 150.62-NM7 (103)
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: ______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
CHILLER MODEL #: _______________________
SERIAL #: ______________________________
__
CHECKING THE SYSTEM
PRIOR TO INI TIAL START (NO POWER)
Unit Checks
! 1. Inspect the unit for shipping or installation dam-
age.
! 2. Assure that all piping has been completed.
! 3. Visually check for refrigerant piping leaks.
! 4. Open suction line ball valve, discharge line ball
valve, and liq uid line valve for each system.
! 5. The compressor oil level should be maintained so
that an oil level is visible in the sight glass. The
oil level can only be tested when the com pres sor
is run ning in stabilized conditions, guar an tee ing
that there is no liquid refrigerant in the lower shell
of the com pres sor. In this case, the oil should be
be tween 1/4 and 3/4 in the sight glass. At shut-
down, the oil level can fall to the bottom limit of
the oil sight glass.
! 6. Assure water pumps are on. Check and ad just
wa ter pump fl ow rate and pressure drop across
the cool er (see LIMITATIONS). Verify fl ow switch
op er a tion.
Excessive fl ow may cause cat a stroph ic
damage to the evaporator.
❑ 7. Check the control pan el to ensure it is free of
for eign ma te ri al (wires, metal chips, etc.).
PRE-STARTUP CHECKLIST
❑ 8. Visually inspect wiring (pow er and con trol). Wir ing
MUST meet N.E.C. and local codes. See Fig ures
2- 5, pages 14 - 17.
❑ 9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors and
overloads.
❑10. Check for proper size fuses in main and control
cir cuits, and verify overload setting cor re sponds
with RLA and FLA values in electrical ta bles.
❑11. Assure 120VAC Control Power to CTB2 has 15
amp minimum capacity. See Table 1, page 18.
❑12. Be certain all water temp sensors are inserted
completely in their respective wells and are
coated with heat con duc tive compound.
❑13. Assure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock positions
or suction temp. sensors if EEVs are installed.
❑14. Assure oil level in the compressor or oil line sight
glasses is between 1/4 - 3/4.
❑15. Check the tightness of the heaters on each com-
pressor. Tighten the heater if the heater fi ngers
do not touch the compressor housing. Inspect
the heater around the entire perimeter of each
compressor. The heater should be torqued to 26
in./lbs., ± 4 in./lbs.
COMPRESSOR HEATERS
(POWER ON – 24 HOURS PRIOR TO START)
❑ 1. Apply 120VAC and verify its value between ter-
mi nals 5 and 2 of CTB2. The voltage should be
120VAC +/- 10%.
Power must be applied 24 hours prior to
start-up.
Each heater should draw ap prox i mate ly 0.5-1A.
PANEL CHECKS
(POWER ON – BOTH UNIT SWITCH OFF)
! 1. Apply 3-phase power and verify its value. Volt-
age imbalance should be no more than 2% of the
av er age voltage.
! 2. Apply 120VAC and verify its value on the ter mi nal
block in the Power Pan el. Make the mea sure ment
between ter mi nals 5 and 2 of CTB2. The voltage
should be 120VAC +/- 10%.
! 3. Program/verify the Cool ing Setpoints, Program
Setpoints, and unit Op tions. Record the values
below (see sections on Setpoints and Unit Keys
for pro gram ming in struc tion).
Installation
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