York YCUL0045E, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
65
FORM 150.63-NM8 (1020)
2
S Y S X S P = 7 2 . 1 P S I G
D P = 2 2 7 . 0 P S I G
These displays show suction and discharge pressures
for each system. The discharge pressure transducer is
optional on some models.
If the
optional
discharge transducer is not installed, the
discharge pressure would display 0 PSIG (0 barg).
Some models come factory wired with a low pressure
switch in place of the suction transducer. In this case,
the suction pressure would only be displayed as the
maximum suction pressure reading of >200 PSIG (13.79
barg) when closed, or < 0 PSIG (0 barg) when open.
The minimum limits for the display are:
Suction Pressure: 0 PSIG (0 barg)
Discharge Pressure: 0 PSIG (0 barg)
The maximum limits for the display are:
Suction Pressure: 200 PSIG (13.79 barg)
Discharge Pressure: 400 PSIG (27.58 barg)
This message shows the suction line temperature of
the respective refrigerant system. The minimum limit
on the display for these parameters is 9.2°F (-12.7°C).
The maximum limit on the display is 85.4°F (29.7°C).
The temperatures sensors for this function are optional
on all models.
The above two messages will appear sequentially for
each system. The first display shows accumulated run -
ning hours of each compressor for the specific system.
The second message shows the number of starts for each
compressor on each system.
Run times and starts will only be dis -
played for the actual number of sys -
tems and compressors on the unit.
This display of the load and unload timers indicate
the time in seconds until the unit can load or unload.
Whether the systems loads or unloads is determined by
how far the actual liquid temperature is from setpoint.
A detailed description of unit loading and unloading
is covered under the topic of Capacity Control. This
display will not be visible in Suction Pressure Control
mode.
This message will only be displayed when Discharge
Air Control is selected. This message indicates the tem-
perature error and the rate of change of the discharge
air temperature.
This display will only be visible in Discharge Air Control
mode and indicates the current LEAD system. In this
example system 2 is the LEAD system, making system
1 the LAG system. The LEAD system can be manually
selected or automatic. Refer to the programming under
the “OPTIONS” key. The Lead System display will only
appear on a two system unit.
A unit utilizing hot gas bypass should
be programmed for MANUAL with
system 1 as the lead system. Failure
to do so will prevent hot gas operation
if system 2 switches to the lead system
when programmed for AUTOMATIC
LEAD/LAG. This is not a problem if
the YCU is fitted with hot gas on both
systems.
S Y S X S U C T I O N T E M P
= X X X . X ° F
S Y S X H O U R S 1 = X X X X X
2 = X X X X X, 3 = X X X X X
L O A D T I M E R 5 8 S E C
U N L O A D T I M E R 0 S E C
S Y S X S T A R T S 1 = X X X X X
2 = X X X X X, 3 = X X X X X
T E M P E R R O R X X X . X ° F
T E M P R A T E X X X . X ° F / M
L E A D S Y S T E M I S
S Y S T E M N U M B E R 2