1. DELCOS 3100 Electronics
38
1.8
Water circuit
1.8.1
Electrical equipment
1.8.1.1
Relay module
The electrical equipment of the water circuit is
connected to a relay module.
This has the designation “DH module“ and the MS bus
address 04 in the circuit diagram.
1.8.1.2
Level switch
The level switch records the water level in the pressure
tank. This is shown in the status bus in the [WATER]
menu (see Chapter 1.8.2).
If the level switch simultaneously shows an excessively
high or excessively low water level, FAULT LEVEL-
SWITCH is read out (see Chapter 1.5 – Table Faults /
Warnings).
1.8.1.3
Solenoid valves
The pressure tank can be topped up with water from the
water treatment unit using the solenoid valve for water
inlet. Since the water is topped up by the compressor
stage the process can only be performed with the motor
running under load.
Water can be drained from the pressure tank using the
solenoid valve for water drainage. Since sufficient
residual pressure must be present in the system to
press the water from the pressure tank this can only be
done when the motor is running.
The solenoid valve for water stop interrupts the water
circuit if the motor has come to a standstill. This
prevents the compressor stage from running full with
water or water being pressed from the intake controller.
The current status of the solenoid valves is shown in
the status bar in the [WATER] menu (see Chapter
1.8.2).
1.8.2
Status display for water circuit
The status display contains information on the
remaining time to the next water exchange and the
status of the solenoid valves and the water level in the
pressure tank.
Example:
[22h y8 y9 Y10 >-<]
22h :
Remaining time to the next water exchange
(real time, i.e. not dependent on operating and
load hours).
y8:
Status of the solenoid valve for water inlet
y9:
Status of the solenoid valve for water outlet
Y10:
Status of the solenoid valve for water stop
The following is shown:
y
solenoid valve not triggered
Y
solenoid valve triggered
>–<
Height of the water level
The following is shown:
water level too high
>–<
water level within admissible range
water level too low
In order to obtain a fast overview of the status of the
water circuit during the normal operation of the machine
the key can be used outside the menu to fade in and
out the status display of the water circuit. This is then
displayed in alternation with the status display of the
basic load sequencing (option in version FS and SR).
1.8.3
Automatic water level regulation
1.8.3.1
Water level too high
If the water level rises in the pressure tank during
operation (not during water exchange (display
¯
) and if
the motor is running, the solenoid valve for water
drainage is automatically opened after a time delay.
This permits the excess water to be drained until the
water has reached the admissible level again (display
>–<).
If this is not successful within a specific period, FAULT
DRAINAGE 5 is read out (see Chapter 1.5.2).
This time can be set in the [WATER] menu in the
DRAINAGE MAX. menu option.
1.8.3.2
Water level too low
If the water level drops in the pressure tank during
operation (not during water exchange) (display
) and
if the machine is running under load, the solenoid valve
for water inlet is automatically opened after a time
delay. This causes the water to be passed from the
water treatment unit to the pressure tank until the water
has reached the admissible level again (display >–<).
If this is not successful within a specific period,
WARNING SUPPLY 5 is read out (see Chapter 1.5.2).
This time can be set in the [WATER] menu in the
SUPPLY MAX. menu option.