Johnson Controls York MaxE YK Series, Manual

Page: 108 / 139

FORM 160.75-O1 (309)
9
JOHNSON CONTROLS
checKing the oil leVel
in the oil reserVoir
Proper operating oil level – During operation, the oil
level should fall to the “Operating Range” identified on
the vertical oil level indicator label (See Figure 3).
• If the oil level during operation is in
the “Over Full” region of the oil level
indicator, oil should be removed from
the oil reservoir, This reduces the oil
level to the “Operating Range”.
• If the oil level during operation is in
the “Low Oil” region of the oil level
indicator, oil should be added to the
oil reservoir. (See “Oil Charging Pro-
cedure”, page 21)
start-up procedure
Pre-Starting
Prior to starting the chiller, observe the OptiView Con-
trol Center (Refer to Form 160.54-O1). Make sure the
display reads "
SYSTEM READY TO START"
.
Vent any air from the chiller water
boxes prior to starting the water
pumps. Failure to do so will result in
pass baffle damage.
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 established
through the unit. If the chilled liquid pump is wired
to the Microcomputer Control Center the pump will
automatically start, therefore, this step is not neces-
sary.
2. To start the chiller, press the COMPRESSOR
START
switch. This switch will automatically spring
return to the RUN position. (If the unit was previ-
ously 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 a graphic display.
For display messages and information pertaining
to the operation of the OptiView™ Control Center,
refer to Form 160.54-O1.
section 2
sYstem operating procedures
oil heaters
If the oil heater is de-energized during a shutdown period,
it must be energized for 12 hours prior to starting compres-
sor, or remove all oil and recharge compressor with new
oil. (See “Oil Charging Procedure”, page 21.)
oil heater operation
The oil heater operation is controlled by the OptiV-
iew™ Control Center. The heater is turned on and off to
maintain the oil temperature differential to a value 50°F
(27.8°C) above the condenser saturation temperature.
This target value is maintained by the control panel.
If the target value is greater than 160°F (71°C), the target
defaults to 160°F (71°C). If the target value is less than
110°F (43.3°C), it defaults to 110°F (43.3°C).
To prevent overheating of the oil in the event of a con-
trol center component failure, the oil heater thermostat
(1HTR) is set to open at 180°F (82°C).
fig. 3 – oil leVel indicator
LD08647
Comply with EPA and local regula-
tions when removing or disposing of
Refrigeration System oil!