Installation And Connection In Twin Booster Sets - EBARA Press-o-Matic Bedienungsanweisung

MASTER STATUS: w
to pressure changes i
stopping the pump uni
water demands from th
SLAVE STATUS: w
characters appear on t
pump is running the s
stopped its starting is i
OPERATION: at the ti
beco mes the MASTER while the other functions as the SLAVE. When user services are opened
the MASTER device starts the pump and when the maximum rotation speed is reached an
system pressure is lower than the preset Pmin value, it transfers control to the second inverter,
which becomes the new MASTER, while the first inverter becomes the SLAVE and its rotation
speed remains fixed. With the progressive closing of the user services the second device stops
the pump and control is again transferred to the first inverter, which will stop the electric pump
when the water demand is reduced to zero after complete closing of each user. After the
electric pump has been stopped MASTER status is again transferred to the other device to
ensure constant changeover of the pump that is started first. In the event of a fault or error on
one of the two inverters, the healthy device will automatically assume MASTER status and start
operating in stand-alone mode.
To activate the changeover function it is not necessary to set any parameters in the menu
because Press•o•Matic automatic
electrical connection has been made.
The Pmin and Pmax values set must be the same for both devices.
hen the device works as a M
n the plant and thus capable of
t and modulating pump rpm in
e plant.
hen the device works as a SLAVE
he display bottom line; in this
peed remains constant, while if
nhibited even when the taps ar
me of power-on the first device that gets the control over the other
ally detects the presence of a secondary device once the
Installation and connection in twin
booster sets
INSTALLATION: install each Press•o•Matic
unit on the pressure line of the corresponding
electric pump. Connect the outlet union of
each inverter to the delivery manifold without
interposing a check valve. Connect the
suction of the electric pumps to the common
intake manifold, interposing a check valve for
each pump to prevent it from emptying when
stopped. Press•o•Matic is compatible with both
vertical and horizontal installation.
CONNECTION: the two Press•o•Matic units
are connected by an unshielded 4x0.5 mm2
cable as shown in the diagram beside. The
maximum cable length is 100 cm including
stripped ends. Customers can order a
preassembled connection cable with te
and cable numbering - Ref. 362 400 414.
If no cable is connected the device will
function in stand-alone mode.
A STER it is sensitive
starting and
accordance with
two capital S
condition if the
the pump is
e opened.
90
rminals
d the