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"Regumaq X-25"
10. Maintenance
CAUTION
Risk of scalding due to hot fl uids!
If the station has been in operation, there is a
risk of scalding due to the unintentional dis-
charge of hot water or steam.
f Allow the system to cool down.
f Wear safety goggles.
CAUTION
Risk of burns due to hot components!
Any unprotected contact with hot components
may lead to burns.
f Wear safety gloves.
10.1 Maintenance
Carry out the following maintenance work once a year.
Each time maintenance work is complete,
complete the handover report as soon as
possible. The relevant form can be found in the
appendix. Sign the report and provide the user
with a copy.
10.1.1 Leak check (visual inspection)
f Check all external interfaces to the pipework and
inside the station for damp zones. Tighten up the
screws if necessary or replace any defective seals.
f Check the heat exchanger for damp areas.
Damp areas are a sign of corrosion – partic-
ularly when coupled with discoloration. Any
leaking heat exchangers must be replaced.
10.1.2 System pressure check
f Compare the actual values in the storage cylinder
and potable water circuit with the last maintenance
or transfer report.
f Adjust any deviations in the potable water circuit
using the pressure reducer.
f If the pressure in the storage cylinder circuit is too
low, increase the water pressure.
f If the pressure in the storage cylinder circuit is too
high, there could be a corrosion problem in the heat
exchanger. Any defective heat exchangers must be
replaced.
138112581-V01.10.2019
10.1.3 Functional check of the safety valves
(potable water circuit)
Check the function of the safety valves at six-month
intervals in accordance with DIN EN 806-5.
10.1.4 Water sampling
If required by law for your application environment, take
samples from the potable water circuit in your installa-
tion at the prescribed intervals.
This involves connecting a water sampling valve (PV,
see Illust. 9) to the hot water outlet port of the heat ex-
changer (position (17) in Illust. 1 on page 10).
A further sample must be taken at the furthest
away draw-off point.
If an additional pipe is used for circulation,
connect a third water sampling valve to the
connection provided and take a corresponding
water sample there.
10.1.5 Actuation of the four isolating ball valves
NOTICE
Risk of damage due to pressure surge!
Sudden fi lling of the station with water may
lead to damage, for instance to the sensors or
sealing points.
f Always open and close ball valves slowly.
Actuate the four isolating ball valves during the course
of maintenance (positions (7), (9), (16) and (18) in Illust. 1
on page 10). This allows deposits to be removed and
keeps the valves and fi ttings fi t for use.
10.1.6 Electronic components and plug-in
connections
Check:
• the cable plug-in connections of all components
connected to the controller for tightness and intact-
ness.
• the correct positioning of the temperature sensors.
10.1.7 Functional check of the check valve of the
circulation set
If a circulation set is used in the potable water system,
check the check valve for correct function. Please ob-
serve the documentation for the potable water circula-
tion set.
The annual check of the check valve is a normative
requirement in accordance with DIN EN 806-5.
Maintenance
45
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