Burkert Type 8709 - Handbuch (Seite 12)

44
mainTenance, 10.
TroubleshooTinG
safety instructions 10.1.
Danger!
Risk of injury from high pressure in the equipment!
Before loosening the lines and valves, turn off the •
pressure and vent the lines.
Risk of injury due to electrical shock!
Before removing covers, • switch off the power supply and
secure to prevent reactivation!
Observe applicable accident prevention and safety
•
regulations for electrical equipment!
Warning!
Risk of injury from improper maintenance!
Maintenance may be carried out by authorized techni- •
cians only and with the appropriate tools!
Risk of injury from unintentional activation of the
system and an uncontrolled restart!
Secure system from unintentional activation. •
Following maintenance, ensure a controlled restart. •
english 45
maintenance Work 10.2.
The LFC / LFM is maintenance-free during operation
according to the information indicated in this manual. A
routine recalibration is not required.
Caution!
Risk of injury from function impairment and device
failure if the device is opened!
Inside the device are elements to condition the flow and
measure the flow-rate. It is permitted to enter the device,
for example for cleaning, only as described in Chapter
10.2.1. .
Extensive device intervention causes a change to the
sensor signal, requiring a recalibration at the factory.
Do not open the device. •
Cleaning other than that described in chapter • 10.2.1.
and recalibration may be performed by the manufac-
turer only.
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46
10.2.1. maintenance when operating
with highly soiled fluids
If larger quantities of particles were recorded after pro-
longed operation with soiled fluid, the stainless steel mesh
filter disc can be cleaned or replaced and the orifice pipe
can be cleaned.
➆
O-ring 6 x 1.5
➅
Orifice pipe
➄
Stainless steel mesh filter disc
➃
O-ring 12 x 2
➂
O-ring 17 x 1.5
➁
Input flange plate
➀
M3 x 12 bolt
Guide pin of the
orifice pipe
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Procedure:
To gain access to the stainless steel mesh filter disc,
→
detach the input flange plate ➁
(see figure on page 46).
Take out stainless steel mesh filter disc and orifice pipe.
→
Clean stainless steel mesh filter disc / orifice pipe.
→
There are various types of suitable cleaning agents, e.g.
distilled water (not tap water), acetone, isopropanol or
compressed air.
After cleaning, the parts must dry.
→
Re-insert parts in the correct sequence and position
→
(see figure on page 46).
• The orifice pipe ➅ must be inserted in such a way that
the guide pin of the pipe is inserted into the corre-
sponding bore in the base block.
• When inserted, the fine mesh of the stainless steel
mesh filter disc ➄ must face the input flange plate ➁.
cleaning and recalibration at 10.2.2.
the factory
If the orifice is excessively soiled or damaged, the device
may deviate significantly from the flow-rate. It must then be
replaced and recalibrated at the factory.
english
Type 8708, 8709, 8718, 8719