KSB Hyamat K 0202, Original Operating Manual

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Hyamat K
23
12 Inspection
KSB offers inspection services to relieve you as far as possible
of the routine necessity of inspecting your Hyamat package
system(s). Take advantage of this additional after-sales service
by taking out a maintenance contract with KSB. Get in touch
with your Service Partner for details.
13 Check list
In the event that you decide to conduct your own inspections,
proceed according to the following check list at least once a
year:
1. Check the pumps and drives for quiet running and the
mechanical seal for integrity.
2. Check the flexible transmission elements for wear.
3. Check the function and seal condition of the shut-off, drain
and non-return valves.
4. Clean the strainer in the pressure reducer (if applicable).
5. Check the expansion joints for wear (if applicable).
6. Verify the pre-set pressure level and check the accumulator
for integrity, if required (see section 14 pre-set pressure
table).
7. Check the automatic control unit / switchgear.
8. Check the ON and OFF points of the system.
9. Check if the functional check run is working.
10. Check the function of the overall system and compare the
actual data with the name plate data.
11. Check the water inlet, pre-set pressure, lack-of-water
monitoring, flow monitoring and pressure reducer.
12. Check the inlet tank and float valve, if applicable. Check the
overflow for integrity and cleanliness.
14 Pre-set pressure
The pre-set pressure in the accumulator should be set to a value which is 10 % lower than the set start-up pressure.
The setting can be effected via a valve located under the cover at the top of the accumulator.
Pre-set pressure table
Pre-set pressure of accumulator
p = 0.9 x p
E
; p
E
= system start-up pressure
Recommendation
Fill the accumulator with nitrogen only (risk of corrosion).
The stated values are average values. Tests on accumulators have shown that
pressures >3 bar for factor 0.9 and
pressures <3 bar for factor 0.8
result in the best storage volumes.
Example:
p
E
= 5 bar pre-set pressure 5 x 0.9 = 4.5 bar
p
E
= 2 bar pre-set pressure 2 x 0.8 = 1.6 bar