Wilo COR-1HELIX VE5203/3/VR, Инструкция по установке и эксплуатации

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Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 33
9 Maintenance
To guarantee maximum reliability in operation at
the lowest possible operating cost, we recom-
mend that the system is checked and maintained
regularly (see DIN 1988 standard). It is advisable to
enter into a maintenance contract with a specialist
company or with our central customer service
department. The following checks should be made
regularly:
• Check that the pressure boosting system is ready
to operate
• Check the mechanical shaft seal of the pump. The
mechanical shaft seals need water for lubrication
and this can leak out of the seal slightly. If this is
very noticeable, change the seal.
• Check the diaphragm pressure vessel (every
3 months is recommended) to make sure that the
supply pressure is set correctly (see Fig. 2b).
CAUTION!
If the supply pressure is incorrect, the function
of the diaphragm pressure vessel is not guaran-
teed, which increases diaphragm wear and can
lead to system faults.
To do this, depressurise the vessel on the water
side (close the flow-through fixture (A, Fig. 4) and
allow the residual water to drain (B, Fig. 4). Now
check the gas pressure at the air valve (top;
remove protective cap) on the diaphragm pressure
vessel using an air pressure gauge (C, Fig. 4). (PN2
= pump switch-on pressure pmin less 0.2-0.5 bar
or the value given in the table on the vessel (Fig. 5)
- Wilo customer service). If the pressure is too
high, discharge nitrogen at the valve.
CAUTION!
Excessive supply pressure (nitrogen) in the dia-
phragm pressure vessel can lead to damage or
destruction of the vessel and thereby also to
personal injury.
The safety measures for the handling of pressu-
rised vessels and technical gases must be
observed.
The pressure specifications in this documenta-
tion (Fig. 5) are given in bar. If other units of
pressure measurement are used, always be sure
to convert the figures correctly.
• In the case of installations with a frequency con-
verter, the inlet and outlet filter of the fan must be
cleaned if these are very dirty.
• If the installation is out of service for a long period,
proceed as described in 8.4 and drain the pump by
opening the drainage plug on the pump base.
(Also observe the corresponding section in the
attached installation and operating instructions
for the pump.)
10 Faults, causes and remedies
Faults, particularly those affecting the pumps or
the control system, should only be remedied by
Wilo’s customer service or a specialist company.
NOTE:
The general safety instructions must be observed
when doing any maintenance or repair work. Also
follow the installation and operating instructions
of the pumps and the control device.
You can find information on pump or control
device faults not dealt with here in the attached
documentation for the components concerned.
If the operating fault cannot be remedied,
please consult a specialist company or your
nearest Wilo customer service or representa-
tive.
11 Spare parts
Spare parts or repairs may be ordered from local
specialist retailers or Wilo customer service.
To avoid queries and incorrect orders, all data on
the rating plate should be submitted with each
order.
Subject to change without prior notice!