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x1 control terminals – power unit
ptc
terminals have Jumper between them.
remove jumper and attach thermistor leads
sl
solo run (Hand Mode)
sl
solo run (Hand Mode)
sl
ptc
start/stop via thermistor
ptc
To protect the motor against thermal overload, a thermistor should be connected to the drive at the terminals la-
beled PTC. This input can also be attached to an external ON / OFF switch when using the HYDROVAR as a Basic
drive. Either the thermistor or on/off switch must be closed between X1/PTC or the drive will stop running! A low
water switch or other protective device can also be connected to these terminals!
if these terminals are not used, they must be jumpered, otherwise the HYdroVar will not start.
8.4.3.1 solo run (Hand Mode)
Terminals x1/sl are used to enable a Basic drive (when used in a multi-pump application) when the commu-
nication from the Master drive fails, or if the Master drive itself fails, or to use the Basic drive as a soft-starter.
• If the circuit is open between the two X1/SL terminals, the HYDROVAR works in standard operation as
controlled by a Master drive.
• When contact between the two X1/SL terminals is closed, (contact between X1/PTC terminals must also
be closed), the HYDROVAR starts up to the pre-selected Max Frequency, (set via fixed speed, (parameter
0245) using ramps 1 and 2 or the fast ramps FminA and FminD).
A manual override switch can be placed between the 2 X1/SL terminals. When the circuit is open, the drive
will work with the Master. When it is closed, the drive will operate manually.
X1
electrical installation and WirinG
