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Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Maintenance
7
7 Maintenance
In order to ensure optimal performance of the devices, inspections need to be conducted at
regular intervals by an authorised specialist installer of the devices, the functioning of the RCCB,
the electrical wiring and the piping. This maintenance work should be conducted by authorised
Customer Services sta. Please contact your Panasonic dealer for maintenance inspections to be
carried out.
The following types of maintenance work should be carried out annually:
● Checking the water pressure
● Checking the pressure relief valve
● Conducting visual checks on the PCBs and terminals
● Cleaning the strainers
● Checking the RCCB
● Checking the air purge valve and venting the system
WARNING
Danger to life from electric shock!
The devices are operated with 230 V or 400 V alternating current. Touching the live electrical
cables can be life-threatening.
► Service and maintenance work must only be carried out by an accredited electrician or an
authorised dealer.
► Before commencing any maintenance work, ensure that the electricity supply is switched
o and is secured against being turned on by mistake.
► Before opening the device, make sure that the entire system is disconnected from the
electric supply. Especially in case of outdoor units of bi-bloc systems, see that the electric
supply of the hydrokit or All in One unit, the tank and the electrical heater is disconnected.
7.1 Checking the water pressure
Carry out the following steps:
1. Check the system pressure on the manometer (→ 4.6.2.1 Components (bi-bloc systems),
p. 29, → 4.6.3.1 Components (mono-bloc systems), p. 52).
The water pressure should not fall below 0.5 bar (0.05 MPa). Under normal operating
conditions, the water pressure should be between 0.5 and 3.0 bar (0.05 and 0.3 MPa).
2. If the system pressure is below the target pressure, top up the uid (→ 6.9.2 Filling and
venting the water system, p. 191).
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