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| 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 | = | < 8.4°F; | > 134.1°F | XXX.X°F | |
WATER TEMP. | |||||
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ENTERING CONDENSER | = | < 8.4°F; | > 134.1°F | XXX.X°F | |
WATER TEMP. | |||||
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LEAVING EVAPORATOR | = < 0°F |
| XX.X°F | ||
WATER TEMP. | = > 81.1°F |
| XX.X°F | ||
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ENTERING EVAPORATOR | = < .1°F |
| XX.X°F | ||
WATER TEMP. | = > 93°F |
| XX.X°F | ||
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FIG. 4 – SYSTEM PARAMETERS – OUT OF RANGE READINGS
To Display CHILLED LIQUID TEMPERATURES:
Press CHILLED LIQUID TEMPS display key as de- scribed on page 7 to produce the following alphanu- meric 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 alpha- numeric 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
FORM
______ 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
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
Continuously pressing this key will display the mo- tor current and line voltage alternately. When used with the DISPLAY HOLD key, motor current and line voltage will alternately be displayed each time this key is pressed. The messages are as follows:
A AMPS = XXXX; B AMPS = XXXX; C AMPS = XXXX
V
If chiller is not equipped with a Solid State Starter, this key produces the following message:
SOLID STATE STARTER NOT INSTALLED
In PROGRAM mode, this key is used to display the applicable line voltage range
YORK INTERNATIONAL | 9 |