ECKELMANN VS 300 - Relay; Control Stage Actuating Mode

Function of VS 300
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Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
4.5.13 Relay / control stage actuating mode
The Run Time Equalization parameter can be used to determine the actuating sequence in the associate control
loop (see section 7 Parameter List and Menu Structure - Control Loop 1/2 Basic Parameter Setpoints - Day and
Night Operation).
Fixed actuating sequence
When the Run Time Equalization parameter is set to 0 or N, the fan actuating sequence remains unchanged. The
fans are started in the order of F1 - Fn and stopped in the order of Fn - F1.
Actuation by run time
When the parameter is set to 1 or Y, the fan actuating sequence is changed. The fans are then started and
stopped not in their respective order but according to run time.
‐ When a fan needs starting, the fan having the shortest run time is started.
‐ When a fan needs stopping, the fan having the longest run time is stopped.
4.5.14 Fan protection / HP base load rotation
Supplementary functions are implemented in the VS 300 Pack Controller for protection of the fan motors. During
periods of low outdoor temperatures when only a small number of fans is needed for condensing, there is a like
lihood of fans seizing after being idle for long periods.
Fan protection is active when base load rotation is activated (parameter for Base Load Rotation Cycle Time set
other than ”--”) and Run Time Equalization mode is deactivated (fixed actuating sequence of relay/control
stages). Base load rotation is activated when run time equalization is activated.
1. Fan protection
Fans that have been idle longer than a definable time (see BaseRotCycle parameter) are forcibly started for a pe
riod of 20 seconds, but only when actual temperature is within or above the neutral zone.
2. Base load rotation
Base load rotation of fans can be performed to achieve equal condenser run time. When the HP controller stays in
the neutral zone for a definable time (see BaseRotCycle parameter), the fan having the shortest run time – when
such is available - is started at the end of the defined time and that having the longest run time is stopped.
2nd BaseRotCycle parameter
When a time is entered for this parameter, either fan actuation or base load rotation is performed at the end of the
set time as a function of the operating modes described above.
Cycletime BLR parameter
A vlaue can be entered to determine the time after which either fan actuation or base load rotation will take
place as a function of the modes described above.
4.6 Controller start
Differentiation is made between two events for starting the VS 300 Pack Controller:
‐ First start
‐ Restart