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8.13 UV disinfection module
This section is only relevant, if the AQpure system is
Note
equipped with an UV disinfection module. See fig. 5,
pos. 3.
Some components of the UV disinfection module can get dirty or
worn, and need cleaning or replacement after a certain time. The
system monitors the UV light intensity and displays an alarm, if
the UV light intensity is too low. The current value of the UV light
intensity in % can be read at the UV controller, which is installed
at the lower back side of the AQpure control cabinet.
Reasons for low UV intensity can be:
•
a defective UV lamp
•
a worn UV lamp
•
a dirty sleeve
•
a dirty sensor
•
water quality deviation (e.g. damaged UF membrane or
problems with activated carbon filter module)
•
a combination of above reasons
Position of the component
See fig. 9, pos. 45.
8.13.1 Safety instructions
Warning
Danger of personal injury from high-intensity
ultraviolet light!
The UV light emitted by the UV lamp can cause
serious burns to unprotected eyes and skin. Never
look directly at an illuminated UV lamp.
Before any service work on the UV disinfection
module, switch off the power supply.
Never operate the UV system while the UV lamp is
outside of the UV reactor.
Observe the separate supplier documents for the
Caution
components. All supplier documents are part of the
documentation package delivered with the system.
8.13.2 Preparations
The following tools are required for this maintenance task:
•
screwdriver
•
small adjustable wrench or key
•
mild acid solution, such as 10 % citric acid, or household
cleaner, such as vinegar (isopropyl alcohol), can be used as
well)
•
several clean cloth
•
water-tight foil
8.13.3 Overview UV system
45.15
45.1
45.17
45.16
45.2
45.11
45.3
45.10
Fig. 23 Components of the UV disinfection device
Pos. Description
45.1 UV reactor
45.2 Quartz sleeve
45.3 Lamp centring spring
45.4 UV lamp
45.5 Lamp connector
45.6 Lamp locator
45.7 Quartz sealing O-ring
45.8 Quartz compression nut
45.9 Earthing wire
8.13.4 Replacing the UV lamp
Read section:
8.13.1 Safety
instructions.
To replace the lamp, there is no need to drain the water from the
reactor chamber.
Dismantling
The following steps refer to fig.: 23-24.
1. Unless the system is already stopped due to an active alarm,
stop the system by pressing the [Stop] button on the HMI.
Warning
Danger from running system!
Make sure, that the Grundfos Eye has stopped
rotating before starting any work on the system
components or lines!
2. Switch off the power supply by turning the main breaker to the
OFF position.
3. Remove earthing nut and washer (45.10) and disconnect the
earthing wire (45.9) from the earthing stud (45.11) on the
reactor.
4. Unscrew screws (45.14) from end cover (45.12).
45.4
45.7
45.5
45.6
45.8
45.9
45.12
45.14
45.13
Pos.
Description
Earthing nut and
45.10
washer
45.11 Earthing stud
45.12 End cover
45.13 Cable gland
45.14 Screws
45.15 Reactor inlet
45.16 Reactor outlet
45.17 UV sensor connection
41
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