20 | WPL 10 ACS WWW.STIEBEL-ELTRON.COM
INSTALLATION
MAINTENANCE
!
Damage to the appliance and the environment
With underfloor heating systems, observe the maximum
permissible temperature for the system.
11.2.2 Further WPM 3 settings
11.2.3 For operation without buffer cylinder
Connect the heating circuit pump to the buffer cylinder pri-
mary pump terminals in accordance with the technical guide.
When everything has been implemented correctly, the system
can be heated to its maximum operating temperature and vented
once again.
!
Damage to the appliance and environment
With underfloor heating systems, observe the maximum
permissible temperature for the underfloor heating sys-
tem.
11.2.4 When using the heat-up program
If you use the heat-up program, make the following settings on
the WPM 3:
Initially set parameter “DUAL MODE TEMP HZG” to 30°C.
Then set parameter “LOWER APP LIMIT HZG” to 30°C.
Note
After completing the heat-up process, reset the param-
eter “DUAL MODE TEMP HZG” and “LOWER APP LIMIT
HZG” to their respective standard values or to the respec-
tive system values.
11.3 Operation and control
!
Damage to the appliance and the environment
Never interrupt the power supply, even outside the heat-
ing period. The system‘s active frost protection is not
guaranteed if the power supply is interrupted.
The system does not have to be switched off in summer. The
WPM3 has an automatic summer/winter changeover.
11.4 Taking the appliance out of use
If the appliance is to be taken out of use, set the WPM3 to standby.
This retains the safety functions designed to protect the system
(e.g. frost protection).
!
Damage to the appliance and the environment
If the heat pump and frost protection are completely
switched off, drain the system on the water side.
12. Maintenance
Check the condensate drain (visual inspection). Remove contami-
nants and blockages immediately.
!
Damage to the appliance and the environment
Keep the air discharge and intake apertures free from
snow and ice.
Regularly remove all leaves and accumulated dirt from the evapo-
rator fins, which can be accessed by removing the side panel on
the condenser side .
Troubleshooting
Note
Observe the heat pump manager operating and installa-
tion instructions (WPM 3).
If a fault cannot be located during service using the heat pump
manager, open the control panel in emergencies and check the
IWS settings. This check must only be carried out by a heating
contractor.
12.1 Light Emitting Diodes (LED)
LEDs on the IWS
1
C26�03�01�0921
2
1 LEDs
2 Reset button
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