York YT Millennium, Эксплуатация и техническое обслуживание

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YORK INTERNATIONAL
124
FORM 160.55-O1 (920)
START-UP PROCEDURE
Pre-Starting
Prior to starting the chiller observe the OptiView Con-
trol Center. Make sure the Display reads
“SYSTEM
READY TO START”.
To pre-start the chiller use the following procedure:
1. OIL HEATER - The oil heater must be energized
for 12 hours prior to starting the chiller. The unit will
not start if the oil is less than 71°F. If not possible the
compressor oil should be drained and new oil must
be charged into the oil sump. (See “Oil Charging
Procedure”, page 129)
2. OIL PUMP - To check, press and release the “ MAN -
UAL OIL PUMP ” key under “ Service ” on the Con-
trol Center. The oil pump will run for 10 minutes 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. All Control Center setpoints should be programmed
before the chiller is started. 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:
SECTION 4
SYSTEM OPERATING PROCEDURES
OIL HEATERS
If the oil heater is de-energized dur-
ing a shutdown period, it must be
energized for 12 hours prior to start-
ing compressor, or remove all oil
and recharge compressor with new
oil. (See “Oil Charging Procedure”,
page 129.)
The oil heater is thermostatically
controlled and remains energized as
long as the fused disconnect switch
to the starter or Variable Speed Drive
is energized.
CHECKING THE OIL LEVEL
IN THE OIL RESERVOIR
Proper operating oil level – the middle of the upper
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 “Oil Charging Procedure”, page 129.)
Comply with EPA and Local regu-
lations when removing or disposing
of Refrigeration System oil!
System Operating Procedures
LCWT = 45°F
% Current Limit = 100% FLA
Pulldown Demand = None
Clock = Sun 12:00A.M.
Daily Schedule = None
Holiday = None
Remote Reset Temp. Range = 20°F
Data Logger = No Operation
Start-Up
1. If the chilled water pump is manually operated,
start the pump. The Control Center will not allow
the chiller to start unless chilled liquid flow is es -
tablished through the unit. (A field supplied chilled
water flow switch is required.) If the chilled liquid
pump is wired to the OptiView Control Center the
pump will automatically start, therefore, this step is
not necessary.
2. To start the chiller, press the “ COMPRESSOR
START ” switch. This switch will automatically
spring return to the “ RUN ” position. (If the unit
was previously started press the “ STOP/RESET ”
side of the “
COMPRESSOR
” switch and then press
the “ START ” side of the switch to start the chiller.)
When the start switch is energized the Control Center
is placed in an operating mode and any malfunction
will be noted by messages on the OptiView Control
Center. (See Fig. 3)