Western Zeta Rev HE FC Скачать руководство пользователя

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The connection between the master unit and the slave units made with a CAT cable. 5E/UTP (prepared by the

customer) with RJ45 connectors. Maximum cable length 100m.
When other free cooling units are present, besides the master, in the same network of machines, it is possible

to activate the Multifree function: this function allows the master to activate the free cooling sections of all the

units in the network, even those whose compressors are off.
The Multifree function therefore makes it possible to have a free cooling section equivalent to the sum of the

individual sections, thereby obtaining a reduction in the Total Free-cooling Temperature, an increase in the

free cooling capacity and therefore less use of the compressors with consequent saving of absorbed energy.
For further details, please refer to the controller manual.

IACV Automatic circuit breakers

With this accessory, automatic circuit breakers are installed instead of fuses for the protection of auxiliary

loads. Also, the same accessory uses automatic circuit breakers with adjustable thermal overload protection

to protect the compressors.

PBA

BACnet protocol over IP (Ethernet)

The controller is set for use, in read and write mode, of the BACnet port on IP protocol.
By default, the programming gives read-only access to the control of the unit. Enabling of read/write access

should be requested when ordering.

RE1P Relay for management of 1 external pump

This accessory can be requested for units without pumps and allows a pump outside the machine to be con-

trolled.

RE2P Relay for management of 2 external pumps

This accessory can be requested for units without pumps and allows two pumps outside the machine to be

controlled with a running/stand-by logic by implementing a rotation on the hours of operation.

RIF

Power factor correction to cosφ ≥ 0.9

With this accessory, an electrical control panel, containing power factor correction condensers to bring the

cosφ of the unit to being greater than 0.95, is supplied loose. The condensers should be connected (by the

customer) to the electrical control panel of the unit in the specially prepared terminal board.
Besides reducing the absorbed reactive power, the use of this accessory also allows the maximum absorbed

current to be lowered.

RMMT Maximum and minimum voltage relay

This accessory constantly monitors the voltage value and the unit's power supply phase sequence. If the sup-

ply voltage does not fall within the set parameters or there is a phase reversal, an alarm is generated that

stops the machine to prevent damage to its main parts

SETD Double set point from digital input

The accessory allows you to preset two different operating set points and manage the change from one to the

other through a digital signal.
The set point temperatures must be specified when ordering. For optimization of the unit, reference will be

made to the lowest set point.
Unless otherwise specified in the order, the controller will be set at the factory with the following temperatures:

•

set point 1 at 7°C

•

set point 2 at 12°C

SETV Variable set point with remote signal

The accessory allows the set point to be varied continuously between two preset values, a maximum and a

minimum, depending on an external signal that can be of the 0-1V, 0-10V or 4-20mA type.
The set point temperatures and the type of signal to use for the adjustment must be specified when ordering.

For optimization of the unit, reference will be made to the lowest set point.
Unless otherwise specified in the order, the controller will be set at the factory with 0-10V analogue input and

with the following temperatures:

•

0V will correspond to a set point of 7°C

•

10V will correspond to a set point of 12°C