Hoval UltraGas 1000, Техническая информация, Страница: 45 / 58

6. Maintenance
NOTICE
Damage to the plant as a result of failure to
perform maintenance or cleaning or incorrect
maintenance and cleaning.
Have the heating plant inspected and cleaned
once per year.
If necessary, have the plant serviced. To
avoid damage to the heating plant, remedy
faults immediately!
6.1 Safety instructions
CAUTION
Cutting injuries as a result of sharp edges.
Handle parts of the casing carefully and
avoid contact with sharp edges.
!
CAUTION
Risk of injury for non-expert personnel.
Maintenance and cleaning work are only al-
lowed to be performed by trained specialist
personnel or by Hoval customer service.
NOTICE
After repairs or replacements of boiler parts,
flue gas measurement must always be per -
formed as described in point 6.7.
WARNING
The heat generator must be de-energised for
maintenance.
Set the blocking switch to "0" and disconnect
the heat generator from the mains (e.g. main
switch).
WARNING
All electric power supply circuits must be
switched off before accessing the terminals.
Perform reset. See operating manual.
6.2 Deaeration
1. Open all radiator valves.
2. Heat up the plant for at least half a day with a high
flow temperature.
3. Switch boiler off and wait for 5 minutes.
4. Thoroughly bleed the system.
6.3 Top up with water
§
ÖNORM H5195, European Standard
EN 14868 and VDI Guideline 2035 must be
complied with (see point 5.3).
If the water pressure drops below 1 bar,
a warning is output and the boiler output is
reduced to 50%. If the water pressure drops
below 0.5 bar, the boiler automatically switch-
es to lockout.
Replenish replacement water if the pressure drops below
the minimum system pressure:
1. Connect the filling hose to the water tap.
2. Deaerate the filling hose.
3. Connect the filling hose to the filling and drain valve.
4. Replenishing replacement water (see point 5.2).
6.4 Renewing fuse
WARNING
Electrical installations may only be carried
out by a qualified electrician.
1. Set the blocking switch to "0" and disconnect the heat
generator from the mains (main switch, fuse).
2. Remove the front casing according to the procedure
in chapter 4.8
3. Remove the protecting cover from TopTronic
®
E -
WEZ, press to the side and remove.
4. Renew fuse (T 10 A 250 V).
Fig. 29
5. Mount protecting cover, close casing.
6. Restore the electrical power supply.
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MAINTENANCE