6.0 Adjustments
16 CC1132751C
6.6 Servo Valve (Fig 6.2)
The servo valve controls pressure when there is no demand for
air, settings shown in Section 2.0 Product Information are a
maximum and must not be exceeded.
Access to the servo valve requires the cabinet front door to be
opened, the top cover panel, the intake filter and the intake filter
support to be removed.
Fig 6.2 Servo Valve
If the servo needs adjustment or a lower pressure is required
then carry out the following procedure.
a)
Turn the electrical supply on at the isolator, disconnect
the air outlet valve from the system and fit an air
silencer.
b)
Select continuous operation from the [CONTROL
MENU], start the compressor open the outlet valve and
allow to warm up.
c)
Release locknut (A), turn grub screw (B) anti-clockwise
for two turns and close the outlet valve.
d)
Screw in grub screw (B) clockwise to increase pressure
to the desired setting, allow pressure to stabilise.
e)
Open and close the outlet valve, allow pressure to
stabilise, check the pressure gauge reading.
f)
If low turn grub screw (B) clockwise to increase or anti-
clockwise to decrease pressure.
g)
With the correct pressure showing on the gauge secure
the servo locknut (A).
h)
Reset the compressor from continuous operation back to
automatic stop/start operation.
Stop the compressor, isolate from electrical supply and remove
air silencer, re-connect the outlet valve to the system.
6.7 Setting Timer Units
The time and date will have been set as described in Section
5.8, this is the basis for accurate timer operations.
Go to the TIMER CONTROL sub-menu, use the
or
key to
select from seven different timer units. The status line of each
switching unit is as follows:
a)
b)
c)
d)
1 ____________00:00 00:00
a)
Unit no.
b)
Days of the week [SMTWTFS] = Sunday, Monday
c)
Switch-in point
d)
Switch-out point
If there are no days of the week selected in the switching unit
line, the switching unit is not active. The switching unit only
becomes active when the day of the week is set.
When the
key is pressed, the first underscore _ starts to flash.
You can now use the
key to set the first day of the week
(Sunday). Then use the
key to confirm the day of the week.
The next underscore _ then starts to flash. If you do not want to
confirm a day of the week as set, press the
key.
You can run through all seven days of the week in this way.
Once you have confirmed the last day of the week (Saturday),
the first unit of the switch-in point starts to flash. You can either
set this using the
or
key. Once the last unit of the switch-
out point has been confirmed, the whole timer unit is activated.
The next step is to go to the [CONTROL MENU] sub-menu and
then the TIMER CONTROL menu item. You will now see the
default setting TIMER CONTROL OFF. Press the
key, the
OFF value starts to flash. Use the
key to change the value to
ON. Press the
key again to confirm the entry. The timer is
now switched on, press the
key to activate.
Timer unit setting examples are explained below.
Switching unit 1 not active:
1 _______ 00:00 00:00
The unit should run Monday to Friday between 7.30 am and 4.15
pm.
2 _MTWTF_ 07:30 16:15
a)
b) c)
a)
Days of the week Monday to Friday
b)
Switch-in point
c)
Switch-off point
B
A
Summary of Contents for HR04
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