STIEBEL ELTRON WPM - Page 24

COMMISSIONING
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Menu: SETTINGS
- The maximum boiler set temperature has been reached.
The actual and set temperature of the external heat source can be
checked in the INFO/ SYSTEM/ EXTERNAL HEAT SOURCE menu.
 HZG PWM
 Set this parameter to ON if an external heat source is in-
stalled in the system with a PWM interface.
 HZG 0-10 V
 Set this parameter to ON if an external heat source is in-
stalled in the system with a 0 -10V interface.
 HEATING CURVE GAP
In conjunction with a threaded immersion heater
With this parameter you can set how large the temperature differ-
ential to the set heating curve has to be in order to switch off again
the threaded immersion heater serving as an external heat source.
In conjunction with a boiler
With this parameter you can set how large the temperature dif-
ferential to the set heating curve has to be in order to feed the
desired flow temperature into the heating system. The desired
flow temperature is calculated from the heating circuit set tem-
perature (buffer cylinder set temperature) and the heating curve
gap that is set here. The boiler mixer circuit is controlled according
to the flow temperature.
 SET BOILER TEMPERATURE
Note
 Set this parameter if you are using a cast iron boiler,
in order to prevent the formation of condensate. Ob-
serve the boiler manufacturer's instructions.
With this parameter you can set how high the temperature in the
boiler should be.
 BLOCKING TIME EVU
During a tariff blocking time by the power supply utility, the heat
pump cannot meet a heat demand. With this parameter, you can
specify the behaviour of the external heat source during blocking
time.
OFF
During blocking time, the external heat source assumes responsi-
bility for heating even above the dual mode temperature.
1-10 hours
If the external heat source is not to assume responsibility for heat-
ing during a blocking time, the required blocking time can be
specified in hours.
 Set the number of hours of blocking time after which the ex-
ternal heat source should assume responsibility for heating.
Confirm the selection with OK.
 LOWER APP LIMIT HZG
With this parameter, you can specify the lower application limit
of the heat pump. Below the outside temperature that is set here,
the heat pump is shut down. Heating demand will be covered by
the external heat source alone.
 DUAL MODE TEMP HZG
With this parameter, you can specify the dual mode temperature
of the heat pump. Below this set outside temperature, the external
heat source may back up the heat pump if the heating output has
not been reached. The external heat source assumes responsibility
for heating demand jointly with the heat pump.
 HZG PWM
With this parameter you can set how quickly the external heat
source/gas burner corrects a deviation in temperature. The small-
er the value, the quicker control is restored.
 HZG 0-10 V
With this parameter you can set how quickly the external heat
source/gas burner corrects a deviation in temperature. The small-
er the value, the quicker control is restored.
 ELECTRIC REHEATING
In this menu item, you can specify the parameters of the electric
emergency/booster heater.
 LOWER APP LIMIT HZG
With this parameter, you can specify the lower application limit
of the heat pump. Below the outside temperature that is set here,
the heat pump is shut down. Heating demand will be covered by
the electric emergency/booster heater alone.
 DUAL MODE TEMP HZG
With this parameter, you can specify the dual mode temperature
of the heat pump. Below this set outside temperature, the emer-
gency/booster heater may back up the heat pump if the heating
output has not been reached. The electric emergency/booster
heater assumes responsibility for heating demand jointly with
the heat pump.
 NUMBER OF STAGES
With this parameter you can specify the maximum number of
additional heating levels of the electric emergency/booster heater
for heating.
Between 0 and 3 heating levels can be allowed, according to the
required heating output.
 DELAY
With this parameter you can specify how much time must pass
(after the temperature has fallen below the dual mode tempera-
ture) before the additional heating levels are switched on.