Daikin EKHWCH300B, Installation And Operating Manual

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7 Service and maintenance
Installation and operating manual
23
EKHW(D/C/P)(300/500)(P)B
Daikin Altherma ST (Hot water storage tank)
008.1633099_00 – 06/2020
Short name Meaning
HYW Hydraulic shunt
MAG Diaphragm expansion vessel
P High-efficiency pump
P
1
Central heating pump
P
HP
Heating circulation pump
P
K
Boiler circuit pump
P
MI
Mixing circuit pump
P
S
Solar operating pump +
P
Z
Circulation pump
PWT Plate heat exchanger (condenser)
RLB Return temperature limiter
RoCon BF Boiler controller
RT Room thermostat
S#B Hot water storage tank EKHWP500Bx
S#I Hot water storage tank EKHWCB500Bx
S#K Hot water storage tank EKHWCH500PBx
S#L Hot water storage tank EKHWCB500PBx
S#P Hot water storage tank EKHWDB500Bx
SOL-M1 Solar communication module SOL-PAC LT/HT
SK Solar panel field
SV Safety overpressure valve
T
AU
Outside temperature sensor
T
DHW
Storage tank temperature sensor (heat generator)
T
K
Solar collector temperature sensor
T
MI
Mixer circuit flow temperature sensor
T
R
Solar return flow temperature sensor
T
RH
Return flow temperature sensor heating circuit
T
S
Solar storage tank temperature sensor
T
V
Solar flow temperature sensor
V Fan (vaporiser)
VS Protection against scalding VTA32
7 Service and maintenance
The hot water storage tank is practically maintenance free as a
result of its design. No corrosion protection equipment is required
(such as sacrificial anodes). This means there is no need for
maintenance work such as changing the protective anodes or
cleaning the inside of the storage tank.
Regular inspection of the domestic hot water storage tank
guarantees a long working life and fault-free operation.
DANGER: RISK OF ELECTROCUTION
Live parts can cause an electric shock on contact and
cause fatal burns or injuries.
▪ If there is an electric immersion heater or control and
pump unit installed in the hot water storage tank then
these components must be isolated from the power
supply before starting the work (e.g. fuse, main switch
switched off and secured against inadvertent switching
on again).
DANGER: RISK OF ELECTROCUTION
All work performed on live components must be carried out
in accordance with the proper procedures, otherwise there
may be a danger to the life and health of individuals and
the function may be impaired.
▪ Repair of damage to current-carrying components only
by heating specialists authorised and recognised by the
energy supply company.
7.1 Periodic checks
The filling water can evaporate slightly over a period of time as a
result of the design. This process does not represent a technical
fault, but is rather a physical property which requires periodic
checking and correction of the water level by the operator if
necessary.
▪ Visual check of the water storage tank level (filling level indicator)
▪ Refill water if necessary (see "3.3.2 Buffer tank" [ 4 15]) and also
determine the cause of the low water level and rectify it.
7.2 Annual inspection
▪ Carry out a functional inspection of the electric immersion heater
by checking the temperature display and the switching states in
the individual modes: see the associated installation and operating
instructions.
▪ If a solar system is connected and is in operation, switch it off.
▪ Visual inspection of the general condition of the domestic hot
water storage tank.
▪ Visual check of the water storage tank level (filling level indicator)
▪ If a drain-back solar system is installed, wait until solar
panels are drained completely.
▪ Refill the water if necessary (see "3.3.2 Buffer tank" [
4
15]) and
also determine the cause of the low water level and rectify it.
▪ 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
reinstall it; replace damaged parts.
▪ Visual check of connections and pipes. In the event of damage,
determine the cause.
▪ Replace defective parts.
▪ Check all electrical components, connections, and cables.
▪ Repair damaged parts or replace them.
▪ Check the water pressure of the cold water supply (<10 bar)
▪ and if necessary the fitting or adjustment of the pressure
reducer.
▪ Clean the plastic storage tank with soft cloths and a mild
cleaning agent . Do not use cleaning agents containing
aggressive solvents, as this will damage the plastic surface.