en
Maintenance
32
WILO SE 2020-12
4. check oil pressure in diesel motor pumps;
5. check whether the water flow through the heat exchanger (if any) is adequate.
Diesel motor restart test
Check the diesel motor immediately after the above pump start test:
1. Run the motor for 20 minutes at rated operating point. Stop the motor and then
restart immediately with the manual start test button.
2. Check the water level in the primary closed circuit cooling circuit.
3. Check the oil pressure (read on pressure gauges), motor temperature and coolant
flow during this test. Check the oil pipes and inspect the system in general for leaks
(fuel, coolant or exhaust fumes).
4. Check the suction/ventilation system (air filter, operations, obstructions).
MONTHLY CHECKS
1. Check the level and density of electrolyte in all lead-acid battery cells (including
diesel motor starter batteries and those used to power the electrical switchgear).
⇒ If the density is low, check the battery charger.
⇒ If the device works correctly, replace the defective battery.
QUARTERLY CHECKS
To be performed with a deadline of at least 13 weeks.
1. An inspection report must be signed, dated and handed over to the end-user. The
report must contain details of each procedure performed or planned and details of
external factors such as weather conditions that may have affected the results.
2. Check pipes and supports for signs of corrosion and, if necessary, paint them.
3. Check the grounding of the piping. Sprinkler system piping cannot be used for
electrical grounding. Remove all such ground connections and use an alternative
solution.
4. Check the water supply to each control station in the system. The pump(s) should
start automatically, and the measured pressure and flow rate values should not be
less than those given in the factory design.
5. Record all changes.
6. Check the correct operation of all valves supplying the sprinklers with water. Then
return the valves to their normal operating position. Repeat the same operation for
all water supply, control and alarm valves and all local or auxiliary circuit valves.
7. Verify and check the quantity and packaging of spare parts in stock.
SIX-MONTHLY CHECKS
To be performed every 6 months.
1. Check the alarm and remote message system of the central switchgear.
ANNUAL CHECKS
To be performed with a deadline of at least 12 months.
1. Check the efficiency of each pump at full load (connect the test line to the pump
discharge circuit) and make sure that the pressure and flow rate values of the pump
correspond to those on the rating plate.
2. Check for pressure losses in the supply lines and valves between the water source
and each control station. Check that the diesel motor under test conditions does
not start and check that the no-start alarm is working in accordance with the re-
quirements of the applicable standard.
3. Then start the diesel motor immediately with the manual starting procedure.
4. Check that the float valves in the tanks are working correctly.
5. Check the suction baskets on the suction side of the pumps and the filtering ac-
cessories in the storage tank. Clean if necessary.
TRIENNIAL CHECKS
To be performed every 3 years.
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