Pre-Starting; Section 3 - System Operating Procedures - York CodePak YK L1 L1 G4 Operation Manual

OIL HEATERS
If the oil heater is de-energized during a shut-
down period, they must be energized for 12 hours
prior to starting compressor, or remove all oil and
recharge compressor, with new oil. (See "Charg-
ing Unit With Oil", page 40.)
NOTE: The oil heater is thermostatically controlled
and remains energized as long as the
fused disconnect switch to the starter or
turbo-modulator is energized.
START-UP PROCEDURE

PRE-STARTING

Prior to starting the CodePak, observe the MicroCom-
puter Control Center. Make sure the display reads
SYSTEM READY TO START
To pre-start the CodePak, use the following procedure:
1. Oil Heater – The oil heater must be energized for
12 hours prior to starting the CodePak. The unit
will not start if the oil is less than 71°F (21.7°C). If
not possible the compressor oil should be drained
and new oil must be charged into the oil sump.
(See "Charging Unit With Oil", page 40.)
2. Oil Pump – To check, press and release the
MANUAL OIL PUMP key under Service on the
Control Center. The oil pump will run for 10 min-
utes and shut down. Press and release the
MANUAL OIL PUMP key to stop the operation of
the oil pump for less than 10 minutes of operation.
3. Pre-Rotation Vanes – To perform this test the
starter interlock terminals 3 and 4 must be jump-
ered to allow vanes to open (remove the jumper
after test). Make sure the Control Center is in the
SERVICE mode, then press the prerotation vanes
OPEN and CLOSE keys to observe the operation
of the prerotation vanes. The Control Center sup-
plies a signal to operate the prerotation vanes.
The movement of the vanes will be displayed on
28
SECTION 3
SYSTEM OPERATING PROCEDURES
WARNING
.
CHECKING THE OIL LEVEL IN THE OIL
RESERVOIR
Proper operating oil level – the middle of the up-
per sight glass.
If the oil is excessively high after start-up, the
excess oil may be drained from the oil filter drain
valve while the compressor is running.
If oil level is low, oil should be added to the com-
pressor. (See "Charging Unit With Oil", page 40.)
the Control Center. The display readout is active
whenever power is supplied to the Control Center.
Return from the SERVICE mode to LOCAL, PRO-
GRAM, or REMOTE mode to suit the method of
operation selected for the chiller application. Re-
fer to "Section 2".
4. % Current Limit – Press the % CURRENT LIMIT
setpoint key on the Control Center. The "Display"
should read
CURRENT LIMIT = 100% FLA
State Starter units only, the display is
CURRENT LIMIT = 100% FLA, MTR CUR = XXXX FLA
if the Control Center was not programmed. If the
setpoint is not 100% and was predetermined for
the job application the Control Center should be
programmed to that specification. To program, re-
fer to "Section 2".
5. All Control Center setpoints should be programmed
before the CodePak is started. (Refer to "Section
2".) Prior to start, the clock must be programmed
for the proper day and time. Any setpoints which
are desired to be changed may be programmed. If
not programmed the "default" value setpoints are
as follows:
LCWT = 45°F (7.2°C)
% Current Limit = 100% FLA
Pulldown Demand = None
Clock = Sun 12:00 A.M.
Daily Schedule = None
Holiday = None
Remote Reset Temp. Range = 20°F (11.1°C)
Data Logger = No operation
on (Solid
)
YORK INTERNATIONAL