Igema NA7-50, Installation And Operating Instructions Manual

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 Assembly only by using welding process 111 (manual arc welding) and 141
(tungsten inert gas welding).
6.3 Heat treatment of weldseams
Supplementary temper tests of weldseams are not required.
6.4 Flap indicator
 The centre of the lower process connection is the reference point for the zero
mark of the flap indicator (3).
 The flap indicator fixed by bolt springs (3.1) with stop clamp (3.2) to the
standpipe (factory-made) can be turned into desired position.
Also turn stop clamp !
6.5 Float installation
 The float (2.1) with inner magnetic system and the new gasket (2.2) are
packed and fixed outside of the standpipe (2) when the unit is supplied.
 Open cover flange (2.3)
 Carefully remove float packing
 Insert float with top-heavy side upwards into standpipe (top-heavy side with
colour marking)
 Tighten cover flange (2.3) and associated gaskets (2.2) with standpipe using
successively opposite diagonal tightening (see chapter 9.2)
Remove float before carrying out pressure test of boiler!
Float may remain in standpipe if there are valve between boiler and
standpipe which are closed during the test.
6.6 Drain piping
 Check bolting drain valve (A) / standpipe (2) and retighten if necessary.
 Mount drain piping on drain valve (A) (to be provided by the customer).
Ensure that drain piping has free outlet to atmosphere and is protected
from pressure peaks!
 Close valves.
6.7 Assembly of additional equipment
(for retrofitting, otherwise already pre-
installed)
 Remove indicating ledge before assembly of additional equipment
 Magnetic switches and/or primary element are fixed without obscuring the
indication by means of integrated pipe saddle