Daikin WGZ030DA, Installation, Operation And Maintenance Manual

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IOM 1322 • WATER-COOLED SCROLL COMPRESSOR 54 www.DaikinApplied.com
Automatic Adjusted Limits
The following are set points that will be limited based on the
option selected.
Evaporator Leaving Water Temperature
Mode Refrigerant Type Range
Unit Mode = Cool R134a, R410A 40 to 60°F
Unit Mode = Cool w/Glycol R134a 20 to 60°F
Unit Mode = Cool w/Glyco R410A 15 to 60°F
Unit Mode = Ice R410A 20 to 40°F
Condenser Leaving Water Temperature
Mode Refrigerant Type Range
Unit Mode= HEAT R134a 110 to 160ºF
Evaporator Freeze Temperature
Mode Refrigerant
Type
Range
Unit Mode = Cool R134a, R410A 36 to 42°F
Unit Mode = Cool w/Glycol,
Ice w/Glycol
R134a 18 to 42°F
Unit Mode = Cool w/Glycol,
Ice w/Glycol
R410A 12.5 to 42°F
Ice Leaving Water Temperature
Refrigerant Type Range
R134a N/A
R410A 15 to 40°F
Low Evaporator Pressure Inhibit Loading and Unloading
Mode Refrigerant Type Range
Unit Mode = Cool R134a
R410A 26 to 54 psi
97 to 115 psi
Unit Mode = Cool w/
Glycol, Ice w/Glycol
R134a
R410A 12 to 54 psi
48 to 115 psi
Low Ambient Lockout Temperature
Speedtrol Range
Speedtrol = N 35 – 70°F
Speedtrol = Y -2 – 70°F
NOTE: The backup mechanical high pressure cutout is set at
450 psi for water cooled applications and 600 psi for
air cooled for air-cooled applications.
Dynamic Defaults
Some set points will have a particular default value loaded
when another setting is changed.
Refrigerant Dependent Defaults
AC = Air Cooled, WC = Water Cooled (R134a is water cooled
ONLY)
Number of Fans Dependent Defaults
When the number of fans setting is changed, the forced fan set
points will default to values as shown in the following table:
Events & Alarms
Situations may arise that require some action from the chiller
or that should be logged for future reference. Conditions that
cause a shutdown and require manual reset is known as a stop
alarm. Other conditions can trigger what is known as an event,
which may or may not require action in response. All stop
alarms and events are logged.
Unit Stop Alarms
The alarm output and red button is turned ON when any
stop alarm occurs and turned off when all alarms have been
cleared.
Evaporator Flow Loss
Alarm description (as shown on screen) : Evaporator Flow
Loss
Trigger :
1. Evaporator Pump State = Run AND Evaporator Flow
Digital Input = No Flow for time > Evap Flow Proof Set
Point AND at least one compressor running.
2. Evaporator Pump State = Start for time greater than
Recirc Timeout Set Point AND all pumps have been tried
AND Evaporator Flow Digital Input = No Flow.
Action Taken: Rapid stop all circuits.
Reset: This alarm can be cleared at any time manually via the
keypad or via the BAS clear alarm signal.
Unit Controller Operation