8
YORK INTERNATIONAL
DISPLAY
READS
CONDENSER PRESS. = < 6.8 PSIG,
or > 300 PSIG
XX.X PSIG
EVAPORATOR PRESS. = < 50 PSIG,
or > 125 PSIG
XX.X PSIG
EVAP. PRESS. (BRINE) = < 25 PSIG,
or > 100 PSIG
XX.X PSIG
HOP TRANSDUCER
= < 59.1 PSIG, or > 314.9 PSIG XX.X PSIG
LOP TRANSDUCER
= < 23.2 PSIG, or > 271.8 PSIG XX.X PSIG
DISCHARGE TEMP.
= < 20.3°F;
> 226.4°F
XXX.X°F
OIL TEMP.
= < 20.3°F;
> 226.4°F
XXX.X°F
LEAVING CONDENSER
WATER TEMP.
= < 8.4°F;
> 134.1°F
XXX.X°F
ENTERING CONDENSER
WATER TEMP.
= < 8.4°F;
> 134.1°F
XXX.X°F
LEAVING EVAPORATOR
= < 0°F
XX.X°F
WATER TEMP.
= > 81.1°F
XX.X°F
ENTERING EVAPORATOR
= < .1°F
XX.X°F
WATER TEMP.
= > 93°F
XX.X°F
FIG. 4 – SYSTEM PARAMETERS – OUT OF
RANGE READINGS (STANDARD)
DISPLAY
READS
CONDENSER PRESS. = <46.8 kPa,
or > 2068 kPa
XX.X kPa
EVAPORATOR PRESS. = < 345 kPA,
or > 862 kPa
XX.X kPa
EVAP. PRESS. (BRINE) = < 172 kPa,
or > 690 kPa
XX.X kPa
HOP TRANSDUCER
= < 407 kPa,
or > 2171 kPa
XX.X kPa
LOP TRANSDUCER
= < 160 kPa,
or > 1874 kPa
XX.X kPa
DISCHARGE TEMP.
= < –6.5°C;
>108°C
XXX.X°C
OIL TEMP.
= < –6.5°C;
> 108°C
XXX.X°C
LEAVING CONDENSER
WATER TEMP.
= < –13.1°C; > 56.8°C
XXX.X°C
ENTERING CONDENSER
WATER TEMP.
= <–13.1°C ; > 56.8°C
XXX.X°C
LEAVING EVAPORATOR
= < –17.8°C
XX.X°C
WATER TEMP.
= > 27.3°C
XX.X°C
ENTERING EVAPORATOR
= < –17.7°C
XX.X°C
WATER TEMP.
= > 33.9°C
XX.X°C
FIG. 4A – SYSTEM PARAMETERS – OUT OF
RANGE READINGS (METRIC)
To Display CHILLED LIQUID TEMPERATURES:
Press CHILLED LIQUID TEMPS display key as
described on page 7 to produce the following al-
phanumeric display message:
CHILLED LEAVING = XXX.X°F, RETURN = XXX.X°F
To Display REFRIGERANT PRESSURE:
Use REFRIGERANT PRESSURE display key as
described on page 7 to produce the following al-
phanumeric display message:
EVAP = XXX.X PSIG; COND = XXX.X PSIG
To Display OIL PRESSURE:
Use OIL PRESSURE display key as described on
page 7 to produce the following alphanumeric dis-
play message:
OIL PRESSURE = XXXX.X PSID
The differential pressure displayed is the pressure dif-
ference between the high side oil pressure transducer
(output of oil filter) and the low side oil pressure trans-
ducer (compressor housing). Displayed value includes
offset pressure derived from auto-zeroing during “START
SEQUENCE INITIATED”. If either transducer is out-
of-range, XX.X is displayed. Oil pressure is calcu-
lated as follows:
______ PSID = (HOP – LP) – OFFSET PRESSURE
OFFSET PRESSURE: Pressure differential between
the HOP transducer and LOP transducer outputs dur-
ing a 3 second period beginning 10 seconds after the
start of “START SEQUENCE INITIATED”. During this
time, the transducers will be sensing the same pres-
sure and their outputs should indicate the same pres-
sure. However, due to accuracy tolerances in trans-
ducer design, differences can exist. Therefore, to com-
pensate for differences between transducers and as-
sure differential pressure sensing accuracy, the OFF-
SET PRESSURE is subtracted algebraically from the
differential pressure. The offset pressure calculation
will not be performed if either transducer is out-of-range.
The offset value will be taken as 0 PSI (0 kPa) in this
instance.
To Display OPTIONS:
This key is not used.
NO OPTIONS INSTALLED
is displayed when this key is pressed.
To Display SSS MOTOR CURRENT / VOLTS:
(Solid State Starter Applications Only)
If chiller is equipped with a YORK Solid State Starter,
use SSS MOTOR CURRENT / VOLTS key to dis-
play 3-phase compressor motor current and 3-
phase Solid State Starter input line voltage.
