Thermal Disinfection; Program Description; Faults; Limit Temperature (Bivalence Point - Dimplex WPM 2006 R Installation And Start-Up Instructions Manual

Program Description

8.3 Thermal Disinfection

A start time must be specified for the thermal disinfection. By
starting the thermal disinfection, the system will immediately
attempt to reach the set temperature. Selection of the DHW
generator used for thermal disinfection is dependent on the
operating mode of the heat pump system, the configuration, and
the current statuses of the system. Thermal disinfection is ended
once the set temperature is reached.
9 Program Description

9.1 Faults

The heat pump is blocked during faults. In the case of bivalent
systems, the 2nd heat generator undertakes heating and DHW
preparation. In the case of mono energy systems DHW
preparation is stopped. The immersion heater maintains the
minimum permissible return temperature.
The heat pump manager displays any faults in plain text and, in
addition, the button (ESC) blinks red. The heat pump is blocked.

9.2 Limit Temperature (Bivalence Point)

The external temperature at which the heat pump is just able to
cover the heat consumption is called the limit temperature or
bivalence point. This point marks the transition from heat-pump-
only operation to bivalent operation combined with an immersion
heater or boiler.
The theoretical bivalence point may deviate from the optimal
bivalence point. Particularly during transition periods (cold
nights, warm days), it is possible to lower the energy
consumption by means of a lower bivalence point in accordance
with the wishes and usage of the user. For this purpose, a limit
temperature can be set on the heat pump manager in the menu

9.3 Utility Block / Heat Pump Operation Block

Temporary disconnection of the heat pump may be required by
utility companies (EVU) as a condition for a favourable electricity
tariff. The voltage on terminal ID3 is interrupted during a utility
block.
In the case of systems without a utility block, the enclosed bridge
must be inserted at the relevant terminal connections.
Set the utility block in the menu "Settings – 2nd heat generator
– Utility block (EVU)" .
In the case of bivalent systems, it is possible to react in different
ways to a utility block:
Utility (EVU) 1: Heat pump blocked, the 2nd heat generator is
only enabled in Power stage 3 (see Chap. 9.5 on p. 29).
To enable the thermal disinfection settings menu, a bivalent
heating system and/or flange heater must be set with "Yes" in the
preconfiguration.
NOTE
If the set temperature is not reached within 4 hours, the thermal
disinfection is terminated. The set start time can be activated or
deactivated separately for each day of the week.
After rectifying the fault, the heat pump can be restarted by
pressing the button (ESC). (Switching off the control voltage also
acknowledges an existing fault.)
NOTE
In the case of mono energy systems, by switching to the 2ndheat
generator operating mode, the immersion heater can take over heating
and the flange heater can take over DHW preparation.
"Settings – 2nd heat generator – Limit value" to enable the
2ndheat generator.
The limit temperature is normally only used in mono energy
systems with air-to-water heat pumps or bivalent systems in
combination with boilers.
A limit temperature of –5 °C should be aimed for in the case of
mono energy operation. The limit temperature is calculated from
the heat consumption of the building in relation to the external
temperature and the heat output curve of the heat pump.
If "Operating mode Bivalent-alternative" was set in the
preconfiguration, the heat pump is blocked if the external
temperature is lower than the set limit temperature.
Utility (EVU) 2: Heat pump blocked, the 2nd heat generator is
enabled if a heating request is pending.
Utility (EVU) 3:Heat pump blocked, the 2nd heat generator is
enabled below the adjustable Limit temperature utility 3.
In mono energy and monovalent systems, the 2nd heat
generator is normally blocked during a utility block. The setting
for the utility block is hidden.
NOTE
For an external block of heat pump operation which does not
automatically reset after a max. of 2 hours the external disable contactor
(contact ID4) should be used. If the minimum permissible return
temperature is undershot, the heat pump is enabled even when a
blocking signal is applied.
9.3
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