49
Table 6 — Protective Safety Limits and Control Settings
MONITORED PARAMETER
STATE
LIMIT
COMMENTS
TEMPERATURE SENSORS OUT
OF RANGE
260-270,
272,140,
141
Temperature <-40 deg F or >245 deg F for
3 seconds
Preset Alarm
PRESSURE TRANSDUCERS OUT
OF RANGE
260-270
.06>Voltage Ratio>.98 for 3 seconds, Valid Range
is > -6.7 PSI and < 420 PSI
Preset Alarm, Voltage Ratio=Input Voltage/
Voltage Reference (5 Volts)
COMPRESSOR DISCHARGE
TEMPERATURE
231
COMP DISCHARGE TEMP > 220 deg F
(104.4 deg C)
Preset Alarm,
149
COMP DISCHARGE TEMP > COMP DISCHARGE
ALERT
Configure COMP DISCHARGE ALERT in
SETUP1 screen
103
COMP DISCHARGE TEMP > COMP DISCHARGE
ALERT - 10 deg F(5.6 deg C)
Prestart Alert, Configure COMP DIS-
CHARGE ALERT in SETUP1 screen
MOTOR WINDING
TEMPERATURE
233
COMP MOTOR WINDING TEMP > 220 deg F
(104 deg C)
Preset Alarm, Configure COMP MOTOR
TEMP OVERRIDE in SETUP1 screen
102
COMP MOTOR WINDING TEMP > COMP
MOTOR TEMP OVERRIDE - 10 deg F (5.6 deg C)
Prestart Alert, Configure COMP MOTOR
TEMP OVERRIDE in SETUP1 screen
COMPRESSOR THRUST
BEARING TEMPERATURE
101
COMP THRUST BRG TEMP > COMP THRUST
BRG ALERT - 10 deg F (5.6 deg C)
Prestart Alert, Configure COMP THRUST
BRG ALERT in SETUP1 screen
150
COMP THRUST BRG TEMP > COMP THRUST
BRG ALERT
Configure COMP THRUST BRG ALERT in
SETUP1 screen (rolling element bearings
have higher normal operating temperature
but within limit)
234
COMP THRUST BRG TEMP > COMP THRUST
BRG TRIP
Configure COMP THRUST BEARING
RESET FACTOR (default = 1.4). Trip point
varied by THRUST BEARING RESET. See
PIC II Functions > COMPRESSOR BEAR-
ING TEMPERATURE.
LOW REFRIGERANT
TEMPERATURE (FREEZE
PROTECTION)
243
Chiller in RECYCLE SHUTDOWN and [CALC
EVAP SAT TEMP or EVAP REFRIG LIQUID TEMP]
< EVAP REFRIG TRI 1 deg F
Preset Alarm, configure EVAP REFRIG
TRIPPOINT in SETUP1 screen
232
Water chilling: EVAP REFRIG TEMP < 33 deg F
Brine Chilling: EVAP REFRIG TEMP<0-40 deg F
(configurable) and EVAP APPROACH > EVAP
APPROACH ALERT
Preset Alarm, Configure EVAP
APPROACH ALERT, EVAP REFRIG TRIP
POINT and CHILLED MEDIUM in SETUP1
screen
104
Water Chilling: CALC EVAP SAT TEMP or EVAP
REFRIG LIQUID TEMP < 33 deg F + REFRIG
OVERRIDE DELTA T
Brine Chilling: CALC EVAP SAT TEMP or EVAP
REFRIG LIQUID TEMP < EVAP REFRIG TRIP-
POINT
Prestart Alert, Configure REFRIG OVER-
RIDE DELTA T, EVAP REFRIG TRIP-
POINT and CHILLED MEDIUM in SETUP1
screen
TRANSDUCER VOLTAGE FAULT
239
Voltage Reference < 4.5 VDC or > 5.5 VDC
Preset Alarm
HIGH CONDENSER PRESSURE -
CONTROL
235
CONDENSER PRESSURE > 165 PSI
Preset Alarm, Configure COND PRESS
OVERRIDE in SETUP1 screen
HIGH CONDENSER PRESSURE -
PRESTART
106
CONDENSER PRESSURE > COND PRESS
OVERRIDE - 20 PSI or CONDENSER PRESSURE
> 145 PSI
Prestart Alert, Configure COND PRESS
OVERRIDE in SETUP1 screen. Causes
condenser pump to start and remain on
through startup.
LOW DISCHARGE SUPERHEAT
240
DISCHARGE SUPERHEAT < SUPERHEAT
REQUIRED - 3 deg F(1.7 deg C) for 60 seconds.
SUPERHEAT REQUIRED is calculated for current
conditions.
Preset Alarm, DISCHARGE SUPERHEAT
= COMP DISCHARGE TEMP - CON-
DENSER REFRIG TEMP
CONDENSER HIGH PRESSURE
SWITCH CIRCUIT
207
High Pressure Switch Circuit Open and START =
YES and CONDENSER PRESSURE > 160 PSI
Preset Alarm, High Pressure Switch resets
at 110 +/-7 PSIG
224
High Pressure Switch Circuit Open, START = YES
and CONDENSER PRESSURE < 160 PSI
Preset Alarm, High Pressure Switch resets
at 110 +/-7 PSIG
235
CONDENSER PRESSURE >165
PRESET ALARM
LOW CONDENSER PRESSURE
(FREEZE PROTECTION)
244
Energizes condenser pump relay if Chiller in
PUMPDOWN mode and CONDENSER REFRIG
TEMP < CONDENSER FREEZE POINT
De-energizes condenser pump relay when [CON-
DENSER REFRIG TEMP > CONDENSER
FREEZE POINT + 5 deg F (2.8 deg C)] and
[ENTERING COND LIQUID > CONDENSER
FREEZE POINT]
Preset Alarm, Configure CONDENSER
FREEZE POINT in SETUP1 screen.
154
Energizes condenser pump relay if CONDENSER
REFRIG TEMP < CONDENSER FREEZE POINT.
De-energizes condenser pump relay when [CON-
DENSER REFRIG TEMP > CONDENSER
FREEZE POINT + 5 deg F (2.8 deg C)] and
[ENTERING COND LIQUID > CONDENSER
FREEZE POINT]
Preset Alarm, Configure CONDENSER
FREEZE POINT in SETUP1 screen.
OIL - LOW PRESSURE
228
[OIL PRESSURE DELTA P < 18 PSID and START
= TRUE] or [ OIL PRESSURE DELTA P < 15 PSID
and startup complete after OIL PRESS VERIFY
TIME elapsed]
Preset Alarm, Configure OIL PRESS VER-
IFY TIME in SETUP1 screen
Summary of Contents for AquaEdge 19XR series
Page 69: ...69 Fig 33 19XR Leak Test Procedures a19 1625 ...
Page 154: ...154 Fig 64 Benshaw Inc Wye Delta Unit Mounted Starter Wiring Schematic Low Voltage a19 1873 ...
Page 161: ...161 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v ...
Page 162: ...162 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v cont ...
Page 186: ...186 APPENDIX B LEAD LAG WIRING 19XR Lead Lag Schematic Series Cooler Flow a19 1655 ...
Page 187: ...187 APPENDIX B LEAD LAG WIRING cont 19XR Lead Lag Schematic Parallel Cooler Flow a19 1717 ...