Specifications

8 YORK INTERNATIONAL
OPERATION
To Display CHILLED LIQUID TEMPERATURES:
Press “CHILLED LIQUID TEMPS” display key as
described above to produce the following alphanumeric
display message:
CHILLED LEAVING = XXX.X °F, RETURN = XXX.X °F
To Display REFRIGERANT PRESSURE:
Use “REFRIGERANT PRESSURE” display key as de-
scribed above to produce the following alphanumeric
display message:
EVAP = XXXX.X PSIG, COND = XXXX.X PSIG
To Display OIL PRESSURE:
Use “OIL PRESSURE” display key as described above
to produce the following alphanumeric display mes-
sage:
OIL PRESSURE = XXXX.X PSID
To Display OPTIONS:
Use the “OPTIONS” key to display and program the op-
tional parameters for “Guardian Service” and “Remote
Chiller Communications”. Refer to instruction Form
160.46-NOM 4.1 for operation and programming. If this
option is not installed,
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 display 3-
phase compressor motor current and 3-phase solid state
starter input line voltage. Continuously pressing this key
will display the motor current and line voltage alternately.
When used with the “DISPLAY HOLD” key, motor cur-
rent and line voltage will alternately be displayed
each time this key is pressed. The messages are as fol-
lows:
DISPLAYING SYSTEM PARAMETERS
The “Display ” keys are used to display selected moni-
tored parameters as follows: (Refer to Fig. 4)
• Press and release the appropriate “DISPLAY” key -
the message will be displayed for 2 seconds.
- or-
• Press and hold the appropriate “DISPLAY” key - the
message will be displayed and updated every 0.5
seconds until the “DISPLAY” key is released.
- or -
• Press and release appropriate “DISPLAY” key, then
press and release the “DISPLAY HOLD” key - the
message will be displayed and updated every 2
seconds until the “DISPLAY HOLD” key is again
pressed and released, or 10 minutes have elapsed,
whichever comes first.
NOTE: If the display actually displays X’s, then the moni-
tored parameter is out of normal operating range
(Ref. Fig. 5). If the “English/Metric” jumper is in-
stalled on the Micro Board, all temperatures are
displayed in degrees Fahrenheit (°F) and all
pressures are displayed in pounds per square
inch absolute (PSIA), except oil pressure which
is displayed in pounds per square inch differen-
tial (PSID). If the “English/Metric’’ jumper is not
installed, all temperatures are displayed in de-
grees Centigrade (°C) and all pressures are dis-
played in Kilo-Pascals (KPa).
FIG. 5 - SYSTEM PARAMETERS - OUT OF RANGE
READINGS
VARIABLE DISPLAY -> X’S WHEN EPROM VERSion
CONDENSER PRESSURE
= < 9.3 PSIA; > 41.6 PSIA (3.B) (3.C)
= < 10.0 PSIA; > 40.0 PSIA (Later Versions)
EVAPORATOR PRESSURE
= < 5.0 PSIA; > 12.9 PSIA (3.B) (3.C)
= < 4.0 PSIA; > 12.5 PSIA (Later Versions)
= < 9.0 PSIA; > 78.2 PSIA (3.B) (3.C) (3.E)
= < 14.7 PSIA OR > 75.0 PSIA (Later Versions)
PURGE PRESSURE
(Low Pressure Purge Unit)
= < 00.0 PSIA or > 100.0 PSIA 031-01097-001
(High Pressure Pump Through -012 Rev.
Assisted Purge Unit) .10 and higher
DISCHARGE TEMPERATURE = < 20.3°F; > 226.4°F
OIL TEMPERATURE = < 20.3°F; > 226.4°F
LEAVING COND. WATER TEMP. = < 8.4°F; > 114.4°F
ENTERING COND. WATER TEMP. = < 8.4°F; = > 114.4°F
LEAVING EVAP. WATER TEMP. = < 0°F; = > 81.1°F
ENTERING EVAP. WATER TEMP. = < 0.1°F; > 93.0°F