Xylem YSI Alyza IQ NH4, Operation Manual

Page: 112 / 170

Maintenance and cleaning Alyza IQ NH4
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NOTE
To avoid damage to the measuring unit caused by leaking chemicals,
make sure that the following requirements are met while you are work-
ing with the locking device open:

The connected ChemBags are safely suspended from the supporting
rod.

The ChemBags are not pressed or moved.

The tubes of the ChemBags are fastened in the tube fastening above
the locking device.
 The sample tubes (from the overflow vessel to the measuring unit)
are fixed in the recesses at the left-hand side of the measuring unit.
25 For initial installation of a MultiPort valve:
If necessary, remove from the pressure plate of the MultiPort valve the
blind plugs required for the tube connectors of the MultiPort valve.To do
so, use the special tool in the base of the measuring unit.
26 When exchanging the MultiPort valve (MPV) or individual tubes at the
MultiPort valve:
Unscrew any old tubes from the pressure plate of the MultiPort valve.
To do so, use the special tool in the base of the measuring unit.
27 When exchanging the MultiPort valve (MPV):
Remove the MultiPort valve.
The tubes of the MultiPort valve can be exchanged individually or as
a set:
In the delivery condition, the tube set is already mounted.
28 Only when exchanging the MultiPort valve (MPV):
Insert the new MultiPort valve (MPV).
29 Connect the tubes to the pressure plate of the MultiPort valve.
NOTE
Damaged tubes may leak.
Folded or knotted tubes hamper the transport of the liquids.
The tubes must not be damaged, folded or knotted.