Corrosion Protection Anode; Faults / Troubleshooting (For The User); Decommissioning; Environmental Requirements - Dimplex DHW 300 Instructions D'installation Et D'utilisation

DHW 300 - DHW 300+

8.3 Corrosion protection anode

The corrosion protection anode (Fig.8.1) installed in the domestic
hot water cylinder should be electrically checked on a regular ba-
sis, at least every two years after commissioning, and be re-
placed if necessary. Electrical checking is carried out by means
of a suitable ammeter, without draining the cylinder.
Procedure:
1) Unplug the PE cable from the protection anode tab.
2) Connect the ammeter (0 to 50 mA) between the PE cable
and the tab.
3) Evaluation of wear on the protection anode:
Measured value > 1 mA  protection anode is in working
order.
Measured value < 1 mA  protection anode must be tested
and/or replaced.
If electrical testing does not provide any clear results, a visual in-
spection of the protection anode by a technician is recom-
mended.
Should replacement of the protection anode [by a technician] be
necessary, the cylinder must be drained via the drain valve pro-
vided (to be fitted during installation - see Appendix).
NOTE
Malfunctioning protection anodes reduce the service life of the device!
(Electrically insulated magnesium anode with selenium complying with
DIN 4753 part 6)
Fig. 8.1:Anode electric heater
EN-14
9 Faults / troubleshooting
(for the user)
ATTENTION!
Work on the domestic hot water heat pump is to be performed by
qualified personnel only!
Observe accident prevention regulations!
Check the following:
 the plug is plugged in
 stand-by mode has been selected on the keyboard
 the socket is supplied with voltage
the air inlet temperature or ambient temperature is  7 °C

 the domestic hot water temperature is less than 60 °C
The heat pump switches off prematurely (set
temperature has not yet been reached)
Check the following:
 air ducts have been bent or their openings have been
sealed, or whether any air filters are heavily contaminated
(clogged).
Condensate cannot drain properly (there is water
under the device)
Check the following:
 The seal valve in the end of the condensate hose is contam-
inated or clogged, and clean if necessary; the valve can be
easily removed and replaced.
 the inflow and outflow of air is significantly reduced (bent air
duct / clogged air filter).
If the above suggestions cannot help you eliminate these faults,
please contact your technician or after-sales service partner.

10 Decommissioning

Tasks to be carried out:
 Disconnect the domestic hot water heat pump from the
power supply.
Completely shut off the water circuit (domestic hot water,

cold water and circulation pipe) and drain the domestic hot
water cylinder.
11 Environmental
requirements
During maintenance or decommissioning of the domestic hot
water heat pump, all environmental requirements regarding re-
covery, recycling and disposal of materials and components
must be observed in compliance with DIN EN 378.
451905.66.01 · FD 9511 www.dimplex.de