Membrane controlled anti-siphon device
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Part no. 15 513 52
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MAINTENANCE
After proper assembly and operation, the product is maintenance free.
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Check HS-V.2 at appropriate intervals,
at least every 5 years
:
Proper installation position (see Figure 1).
Check that the safety level HA matches the actual height difference
∆
X.
Switch the pump on an off several times. While doing so, make sure that the anti-siphon
device closes and opens.
Carry out a
FUNCTION CHECK
.
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REPAIRS
If the measures explained above under START-UP and OPERATION do not result in regular
START-UP, and if there is no dimensioning problem, the product must be sent to the
manufacturer for a check. Our warranty does not apply in cases of unauthorised interference.
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The product may be cleaned and maintained only by companies such as those
described in INSTALLATION.
If the burner malfunctions during operation
carry out a check:
Check for leaks at the connection elements of the anti-siphon device:
Is the o-ring in a good condition?
In copper pipes, is the compression fitting with reinforcing ring okay?
Choose the correct inside diameter of the piping:
Choose the inside diameter to suit the actual flow rate.
Measure the suction pressure at the burner pump with the specification
pPump
- 400
mbar.
Is it > 400 mbar?
Check for leaks and/or check the height setting HA
Reduce any excess heights in the piping (max. 4 m)
Reduce pressure loss in the suction line, e.g. with different fittings, elbows, etc.
Check for contamination in the complete suction line, rinse if necessary
Height setting HA corresponds to the actual height difference
∆
X.
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The anti-siphon device must be replaced with a new one:
after flooding,
if fuel escapes from the anti-siphon device.
In the event of inadmissible operating pressures > 10 bar caused by temperature-related
changes in volume, the membrane is destroyed, which, in turn, destroys the anti-siphon
device.
Replacement
According to DIN 4755, membrane-controlled components, such as safety fittings against
siphoning, must be replaced every 10 years at the latest. Replacement is not necessary if it is
confirmed that the product still functions properly.
NOTE
In case of flooding, the anti-siphoning protection is reduced.
For each metre of water column above the membrane-controlled anti-siphon device
HS-V.2 the protection against siphoning is reduced by 1.50 m on average.
No safeguard is guaranteed then.
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