Rotex HPSU compact (V5) Installation And Maintenance Manual page 51

7 x Service and maintenance
WARNING!
At normal atmospheric pressure and
ambient temperatures, liquid refriger-
ant vaporises so suddenly that on con-
tact with skin or eyes it can cause the
tissue to freeze (danger of going blind).
Always wear safety goggles and
protective gloves.
Never allow refrigerant to escape into
the atmosphere (high pressure at the
point of the leak).
When removing the service pipes
from the filling connections, never
hold the connections in the direction
of your body. Residual refrigerant
could escape.
WARNING!
Under the cover of the ROTEX HPSU
compact temperatures of up to 90 °C
can arise during operation. During oper-
ation, hot water temperatures > 60 °C
arise.
– Touching components during or after
operation leads to a risk of burns.
– Water discharged during mainte-
nance and servicing work can cause
scalding on contact with the skin.
Before carrying out servicing and
maintenance work, allow the ROTEX
HPSU compact to cool down suffi-
ciently.
Wear protective gloves.
52
WARNING!
Touching live parts can result in an
electric shock and lead to potentially
fatal injuries and burns.
Before beginning work on live parts,
disconnect all of the systems circuits
from the power supply (switch off
main switch, disconnect fuse) and
secure against unintentional restart.
Electrical connection and work on
electrical components must only be
carried out by qualified electricians
in compliance with valid standards
and guidelines as well as the specifi-
cations of the energy supply
company.
The equipment covers and mainte-
nance opening covers must be re-
fitted immediately after completion of
the work.
1. Remove the cover hood and thermal insulation
(see section 4.3).
2. Carry out a functional inspection of the ROTEX HPSU
compact, as well as all installed accessory components
(backup heater, solar installation) by checking the
temperature display and the switching states in the individual
modes.
3. If a ROTEX solar system of the DrainBack
connected and in operation, switch this off and empty the
solar panels.
4. When operating the ROTEX HPSU compact in a bivalent-
alternative system; switch off all heat generators and
deactivate the bivalent control unit.
5. Visual check of general condition of the ROTEX HPSU
compact.
6. Visual check of the water storage tank level (filling level
indicator)
Top up the water if necessary (see section 7.3), deter-
mine the reason for the low water level and remedy it.
The ROTEX HPSU compact is designed to be low-
maintenance. No corrosion protection equipment is re-
quired (such as expendable anodes). This means there
is no need for maintenance work such as changing the
protective anodes or cleaning the inside of the storage
tank.
7. Check the connection of the safety overflow and drain hose
for leaks, free drainage and gradient.
If necessary, clean the safety overflow and drain hose and
relay it; replace damaged parts.
8. Visual check of connections, lines and safety pressure relief
valve. In the event of damage, determine the cause.
Replace defective parts.
9. Check all electrical components, connections, and cables.
Repair damaged parts or replace them.
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