6 x Operation
92
FA ROTEX HeatPumpSolarUnit - Part 2 - 05/2009
[8] - Configuration of water heating
The parameter settings "Configuration of water heating" determine the minimum and maximum heating times for hot water and
the minimum time between two heating cycles.
1)
The function room cooling is available only for systems of type "HPSU..X".
The following setting options are available:
– [8-00] Minimum runtime heat pump: Sets the minimum runtime for water heating even if the target temperature of the hot
water has already been reached.
– [8-01] Maximum runtime heat pump: Sets the maximum runtime for water heating even if the target temperature of the hot
water has not yet been reached.
– [8-02] Restart time heat pump: Sets the minimum necessary interval between two hot water heating cycles (see Fig 6-16).
– [8-03] Delay time Booster Heater (EHS): Set the delay time for starting up the Booster Heater (EHS) after starting water
heating by the heat pump (see Fig 6-17).
EHS Booster Heater
HP Heat pump
tTime
T
EHS OFF
OFF Temperature of auxiliary heating
(T
U
+ [7-00])
T
EHS ON
ON Temperature of auxiliary heating
(T
EHS OFF
– 2°C)
T
HP MAX
Maximum water temperature of the
heat pump at the temperature sensor
in the hot water storage tank (55°C)
T
HP OFF
OFF Temperature of heat pump (T
HP
MAX
– [6-01])
T
HP ON
ON Temperature of heat pump (T
HP OFF
– [6-00])
T
U
Target temperature for hot water (as
set on user interface on Page 78)
Fig.6-15 View of the control system for water heating with the parameter "Step length for
hot water"
–If a room thermostat is connected to the ROTEX HeatPumpSolarUnit and is configured, the maximum
runtime [8-01] can only be taken into consideration when required in the operating mode Room cooling
1)
or room heating.
If the heat pump is not active in the operating mode Room cooling
1)
or Room heating, the water con-
tinues to be heated by the heat pump until the OFF temperature of the heat pump (T
HP OFF
) (see param-
eter [5]) is reached.
If no room thermostat has been installed, the Configuration of water heating (EHS) is always taken
into consideration.
–By adapting the delay time for the Booster Heater (EHS) [8-03] in comparison to the maximum runtime
[8-02], you can define an additional offset between energy efficiency and heating time.
– If the value for the delay time for the Booster Heater (EHS) [8-03] is set too high, it can take too long
for the water temperature to reach the required target value in operating mode water heating.
– The following rule must be observed: [8-03] < [8-01].
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