30
TRUCLIMATE 700 90-140 TON INSTALLATION MANUAL
Freeze Detection - Refrigerant (Condenser – E5 or
Evaporator HX E4) –
Freeze detection can be triggered by
either a 30 sec. recognition of the FP1 (Condenser HX) or
FP2 (Evaporator HX) temperature OR a 30 sec recognition
of saturation temperature (using Suction pressure) below
setpoint of 30 degrees. For the FP sensors, set points shall
be either 30°F [-1.1 °C] or 15°F [-9.4°C] for the refrigerant
temperature (can also be adjusted between these points).
When the thermistor temperature drops below the selected
set point, the control shall begin counting down the 30
seconds delay. If the thermistor value rises above the selected
set point, then the count should reset. The resistance value
must remain below the selected set point for the entire length
of the appropriate delay to be recognized as a fault.
For the Saturation Temperature, the suction pressure sensor
is monitored and when the resulting saturation temperature
is below 30°F [-1.1°C] for 30 continuous seconds a fault is
triggered in a similar fashion. There is no indication which
condition has triggered the fault other than sensor readings at
the time of the event.
Water Temp Fault EST/ELT – HX fluid (Condenser or
Evaporator HX) –
An E26 alarm can be triggered by a 30
sec. recognition of the EST (Condenser or Evaporator HX)
temperature below specified limit. An E27 alarm can be
triggered by a 30 sec. recognition of the EST (Condenser
or Evaporator HX) temperature above specified limit. It is
recommended that the Alarms be set 1-2 degrees off of the
Fault set points so that the Alarm will trigger first prior to
generating the faults or Lockouts.
Water Temp Fault LST/LLT – HX fluid (Condenser or
Evaporator HX) –
An E28 alarm can be triggered by a 30
sec. recognition of the EST (Condenser or Evaporator HX)
temperature below specified limit. An E29 alarm can be
triggered by a 30 sec. recognition of the EST (Condenser
or Evaporator HX) temperature above specified limit. It is
recommended that the Alarms be set 1-2 degrees off of the
Fault set points so that the Alarm will trigger first prior to
generating the faults or Lockouts.
Over/Under Voltage Shutdown -
An over/under voltage
condition exists when the control voltage is outside the range
of 18 VAC to 30 VAC. If the over/under voltage shutdown lasts
for 15 minutes, the lockout and alarm relay will be energized.
Over/under voltage shutdown is self-resetting in that if the
voltage comes back within range of 18 VAC to 30 VAC for at
least 0.5 seconds, then normal operation is restored.
HydroLink2 Aurora Chiller Controls cont.
Operation Description
Power Up -
The unit will not operate until all the inputs and
safety controls are checked for normal conditions. The unit
has a 5 to 80 second random start delay at power up. Then
the compressor has a 4 minute anti-short cycle delay after the
random start delay.
Condenser HX Evaporator HX
Entering Temp
Low Fault
E26
E26
High Fault
E27
E27
Leaving Temp
Low Fault
E28
E28
High Fault
E29
E29
Содержание TruClimate 700
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