Liquid Line Solenoid Valve; Circuit Capacity Overrides; High Water Temperature Capacity Limit - Daikin Pathfinder AWV Series Installation, Operation And Maintenance Manual

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Liquid Line Solenoid Valve

As an option, the chiller can be equipped with liquid line
solenoid valves. When configured with this option, the Liquid
Line Solenoid Valve Configuration setting should be set to Yes.
If the chiller is configured with liquid line solenoid valves, the
liquid line solenoid valve output should be activated when the
circuit enters the Preopen state and remain on during the Start
and Run states. The output should be turned off 10 seconds
after the circuit enters the Pumpdown state or when the circuit
state is Off.

Circuit Capacity Overrides

The following conditions override automatic capacity control
as described. These overrides keep the circuit from entering a
condition in which it is not designed to run.

High Water Temperature Capacity Limit

If the evaporator LWT is 25°C (77°F) or higher, the circuit
capacity will be limited. If circuit capacity resulting from the
next compressor speed increase is 81.5% or more, the circuit
cannot increase in capacity.
If the circuit capacity is higher than 81.5%, the circuit will
reduce capacity until it is at 81.5% or lower.
Once this limit is triggered, it will be in effect until evaporator
LWT is less than 25°C (77°F) for at least one minute.
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