Xylem YSI Alyza IQ NH4, Operation Manual

Page: 106 / 170

Maintenance and cleaning Alyza IQ NH4
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Maintenance
activities at the
power supply box
Maintenance activities at the power supply box are only required for work at the
heat tracing or power cable (see section 5.9 Maintenance activities at the power
supply box,
 131).
5.5 Installing / exchanging the ChemBags, MPV, tubes
The routine maintenance activities at the measuring unit are included in one pro-
cedure (
MPV
, tubes, ChemBags).
Housing Cleaning the filter mats at
the housing Depending on contamina-
tion
(see section 5.8.2,
 128)
Cleaning the housing As required
(see section 5.8.1,
 128)
Bug screen As necessary
Regular maintenance Interval
WARNING
Dangerous chemicals.
Improper use of chemicals can cause damage to your
health.
Heed the following rules:
 Read the labels of the ChemBags and follow the safety
instructions
 Wear protective equipment (protective goggles, chemi-
cal resistant gloves)
For all activities at the open measuring unit:
 Note the environmental conditions (see Abb. 3.3.1,  26).
 With low ambient temperatures, make sure that the liquids do not
freeze while the maintenance activities are carried out. Leave the
housing open for as short a time as possible.
 Open the outer housing door far enough so the arrestable brake-
stay catches.
 Open the inner housing door far enough so that it touches the
outer door. Tilt the angular sheet (at the inside of the outer door)
over the upper edge of the inside door.