P3.21.2.2 JOCKEY START LEVEL (ID 1675)
Use this parameter to set the level of the PID feedback signal at which the jockey pump
starts when the main pump is in the sleep state.
The jockey pump starts when PID Sleep is active and the PID feedback signal goes below the
level set in this parameter.
NOTE!
This parameter is used only if P3.21.2.1 = 2 PID sleep (level).
P3.21.2.3 JOCKEY STOP LEVEL (ID 1676)
Use this parameter to set the level of the PID feedback signal at which the jockey pump stops
when the main pump is in the sleep state.
The jockey pump stops when PID Sleep is active and the PID feedback signal goes above the
level set in this parameter, or when the PID controller wakes up from sleep mode.
NOTE!
This parameter is used only if P3.21.2.1 = 2 PID sleep (level).
10.21.3 PRIMING PUMP
A priming pump is a smaller pump that primes the inlet of the main pump to prevent suction
of air.
The priming pump function controls a priming pump with a digital output signal. You can set
a delay to start the priming pump before the main pump starts. The priming pump operates
continuously while the main pump operates. If the main pump goes into sleep mode, the
priming pump also stop for that time. When waking up from sleep mode, the main pump and
the priming pump start simultaneously.
Fig. 107: The Priming pump function
A. Start Command (Main Pump)
B. Priming Pump Control (Digital Output
Signal)
C. Output Freq (Main Pump)
D. Priming Time
VACON · 352 PARAMETER DESCRIPTIONS
10
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