Watts FRIWAC Series, Installation And Operating Manual

Page: 13 / 14

13 FRIWAC-IM-DE-W-UK-10-2021-Rev.0 | Part no. 10084532
EN
ENGLISH
9 Maintenance

! DANGER Electricity!
Risk of death from electric shock!
h Maintenance work on the domestic fresh water unit may only
be carried out once the power supply has been disconnected.

! ! WARNING Hot water!
Severe scalding possible.
h
Do not put hands into hot water when draining the domestic
fresh water unit. Allow the domestic fresh water unit to cool
down before completing any maintenance, cleaning or repair
work.

! !
WARNING Hot surfaces!
Severe scalding possible.
h Do not hold pipework or components while the unit is in
operation. Allow the domestic fresh water unit to cool down
before completing any maintenance, cleaning or repair work.
Wear heat-resistant safety gloves if it is necessary to work on
hot components.
NOTICE
Maintenance of the domestic fresh water unit
must be carried out only by specialist personnel who have
been duly trained and authorised by the manufacturer.
9.1 Annual maintenance schedule
1. General visual inspection
• Check the unit for leaks and retighten connections with flat
seals or replace the seals.
2. Functional check
• Check the correct adjustment and operating and perfor-
mance parameters.
• Check for noisy operation.
• Check with the user in the event of anomalies.
3. Ball valves
• Check for correct operation of shut-off valves and ball
valves.
4. Pump
• Be aware of noise build-up in the pump.
5. Post-maintenance checks
• Check all loosened screw connections for a firm seating
and retighten if necessary.
• Remove all tools, materials and other equipment used from
the work area.
• Vent the system.
9.2 Replacing wear parts
Note that the domestic fresh water unit has parts which are
subject to wear that naturally occurs as a result of normal use
even when properly maintained and serviced.
Specifically, these are mechanical parts and parts which are in
contact with hot water and steam such as hoses, seals, valves,
etc.
Normal wear and tear is not a defect and is not covered under
warranty or guarantee. Nevertheless, defects and malfunctions
may only ever be remedied by trained specialist personnel.
Contact your specialist dealer for more information.
9.3 Decommissioning
1. Disconnect the power supply to the domestic fresh water
unit and secure it against reconnection.
2. Remove the front cover of the domestic water unit (Fig. 8-1
on page 11).
3. Close all the shut-off valves Fig. 8-4 on page 12).
After a prolonged shutdown
Relieve the pressure in the domestic fresh water unit (for example,
by opening the vent screws, see Fig. 8-4 on page 12).
9.4 Recommissioning
Follow the instructions in Section 8.2 on page 12 for
recommissioning.