Wilo Helix EXCEL 22 Installation And Operating Instruction page 63

Access lock
The "Access lock" can be used to block all
adjustments to the pump.
Proceed as follows:
• Place DIP switch 2 in the ON position.
The menu <7.0.0.0> will appear.
• Turn the rotary knob to activate or deactivate
the lock. The current status of the lock is
represented by the following symbols
Lock activated: The parameters
are locked and access to the
menus is authorised in read-on-
ly mode.
Lock deactivated: The parame-
ters can be changed and access
to the menus to make adjust-
ments is authorised.
• Place DIP switch 2 in the OFF position. The status
setting will reappear.
9. Maintenance
All servicing should be performed by an autho-
rized service representative!
WARNING! Electrical shock hazard!
Dangers caused by electrical energy must be
excluded.
All electrical work must be performed after the
electrical supply has been switched off and
secured against unauthorized switching.
WARNING! Risk of scalding!
At high water temperatures and system pressure
close isolating valves before and after the pump.
First, allow pump to cool down.
- These pumps are low maintenance. A regular
check is recommended every 15,000 hours.
- If needed, mechanical seal could be easily
replace thanks to its cartridge seal design. Insert
its adjusting wedge in its housing (Fig. 6) once
mechanical seal position is set.
- For pumps equipped with one grease feeder (Fig.
7, ref. 1) respect lubrication frequences men-
tioned on sticker glued on lantern part (ref.2).
- Always keep the pump perfectly clean.
- Pumps which are not being used during periods
of frost should be drained to avoid damage:
Close the guard valves, open completely the
drain-priming plug and the air bleed screw.
DANGER! Danger of death !
The rotor inside the motor is subjected to a per-
manent magnetic field and represents a severe
danger for the persons with a pacemaker. The
disregard gives death or serious injury.
• Don't open the motor!
• Do the dismantling / reassembly of the rotor in
purposes of repair only by the after-sales ser-
vice!
Installation and operating instructions –
:
Helix EXCEL 22­36­52
English
63