Operating Modes; Control Parameters For Flow Controller - Lauda IN 550 XT FC Operation Manual

6.2

Operating modes

6.3

Control parameters for flow controller

Setting the control parameters
V4
NOTICE!
Risk of refrigerant escaping from cooling water circuit
Device damage
Before performing cleaning work and decommissioning the

device, or if there is a risk of freezing, drain the cooling
water circuit of the cooling unit using compressed air or
an industrial vacuum cleaner (watertight). To avoid dam-
aging the valve membrane during cleaning, only blow com-
pressed air into the inflow connector while using an indus-
trial vacuum cleaner to vacuum only from the outflow
connector.
The following information is only relevant for the Integral XT FC device:
When the flow control is deactivated, the pump pressure can be
n
increased or reduced via the pump levels.
When the through-flow control is deactivated, the pump pressure can
n
be limited via the pressure control.
For pressure-sensitive consumers (e.g. glass apparatus) with a maximum
n
permissible working pressure below the maximum pressure of the pump
(with Integral T pressure 3.5 bar, with Integral XT pressure 7.0 bar),
the hoses of the consumer must be laid in such a way that kinking or
squeezing is not possible. In addition, a separate safety valve must be
installed to protect against operating errors.
The device may only be moved once it has been drained. The device
n
must be taken out of operation to do this.
The device supports two operating modes.
In Operation mode, the components of the device are operational.
n
In Standby mode, all device component are switched off. Power is only
n
supplied to the display on the device. This operating mode is suitable for
adjusting multiple settings, for example.
A program that has been started is paused in Standby mode. After acti-
vating Operation mode, the program must be resumed again manually.
A continuous valve and the pump power are used as actuating signals for
flow control unit. Both actuating signals can be parameterized via separate PI
controllers.
Only modify the control parameters if you possess adequate knowl-
edge of control system engineering.
Integral process thermostats with flow control unit 83 / 171