Cleaning; Maintenance, Servicing And Repair; Disposal - Werma 729 Betriebsanleitung

310_729_001_1111.fm Seite 13 Freitag, 2. Dezember 2011 11:58 11
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Cleaning

Clean only with a damp cloth using water or mild non-chafing, non-scratch-
ing cleaning fluid. Never use aggressive substances or solvents when clean-
ing.
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Maintenance, servicing and repair

10.1 Maintenance and servicing
Following assembly and service work the following points must be checked
before re-commissioning. In the interest of explosion protection the following
points are to be regularly checked on all devices, including the maintenance-
free devices of the 729 series.
• Cracks or damage to the glass dome or the light fitting housing
• Connecting lead in a perfect condition?
• Are the cable inlet itself and the seal inside the cable inlet in a proper work-
ing order?
• Are the cable inlet and the plug tightly fitted?
• Is the electrical connection in a perfect condition? Are the PE conductor
and the equipotential bonding conductor connected?
• Are the interiors (Ex d and Ex e housings) clean and in a perfect condition?
• Retighten signal lamp fastening screws! Check for signs of corrosion.
10.2 Changing the bulb
(see fig. 7a/7b page 22 et seq)
 In order to change the bulb with type 785 the housing is to be opened as
described under 7.1.
 Replace defective bulbs with 20W bulbs of the same voltage.
 Close the housing as described under 7.2.
 Inspection of the condition of the flameproof thread gap (on housing and
glass retention ring).
 In order to prevent corrosion the flameproof gap is to be treated with an
acid-free aluminium-compatible grease when the housing is open. If the
device is mounted in an aggressive, corrosive environment regular greas-
ing of the thread gap may be required.
Corrosion protection with a layer of paint is forbidden on principle!
10.3 Repair
Repairs to the flameproof housing are not permitted and as a matter of princi-
ple must be carried out by the manufacturer. Components may only be
replaced by original spare parts!
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Disposal

Observe national waste disposal regulations when disposing of the appliance!
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