9 Servicing
DANGER
Risk of explosion due to leaking gas
Improper service and maintenance work can lead to escaping gas and explosions.
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Close fuel shut off devices prior to any service work.
▶
Care should be taken when dismantling and assembling gas carrying system com-
ponents.
▶
Tightly close the screws on the test points.
DANGER
Electric shock when working with voltage applied
The consequence is serious injury or death.
▶
Isolate unit prior to carrying out service work and protect against accidental re-
connection to the mains.
DANGER
Danger of poisoning by escaping flue gas
Inhalation leads to dizziness, nausea and eventually death.
▶
Check the fill level of the siphon at regular intervals and replenish, if necessary, in
particular when the system has been shut down for longer periods or has been
operated at high return temperatures (> 55 °C).
WARNING
Danger of getting burned on the unit
Hot components can lead to burns.
▶
Allow components to cool before touching.
The operator should ensure that the combustion plant is serviced at least once a year.
Service work must only be carried out by qualified personnel with the relevant exper-
tise. Depending on site conditions it may be necessary to inspect the installation more
frequently. During the service, all system components with high wear and tear or with
a specific life span should be replaced.
Weishaupt recommends a service contract is entered into to ensure regular inspec-
tions.
Prior to every servicing
▶
Inform operator.
▶
Switch off mains switch of installation and safeguard against accidental reactiva-
tion.
▶
Close fuel shut off devices.
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Remove front panel (see Ch. 4).
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Carry out servicing in accordance with the enclosed inspection card
(Print No. 7570).
After every servicing
▶
Check soundness of gas valve train (see Ch. 7.1.1).
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Check soundness of flue gas and condensate carrying components.
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Check tightness of water carrying components.
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Check tightness of air carrying components.
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Check combustion values and O
2
content, if necessary re-adjust.
▶
Enter combustion values and settings in the commissioning record.
▶
Refit front panel.
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
9 Servicing
83266502 • 1/2010-08 • La
62-95
