Worcester 11 KW, User Manual

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SETTINGS
6 720 802 172 (2012/06) 14
>>> Room temperature exception
▶ Set the temperature that should apply as programmed temperature in
the program.
The menu is displayed only if
Program 1 or Program 2 has been
selected.
>>> Copy to all heating circuits
▶ Select Yes to have the same control for all installed circuits.
The menu is displayed only under Circuit 1 .
Room temperature program when there is no room controller:
>> Room temperature program
>>> Active program
>>> View/edit active program
The same as when there is a room controller, see above.
>>> Room temperature normal
▶ Set the measured value in the room.
The indicated value is used by temperature programs to calculate the
difference between normal and exceptional temperature.
>>> Temperature increase/decrease
▶ Use this function to adjust the room temperature so that the normal
room temperature (see the previous menu) becomes the desired
temperature.
▶ Use this function to simply increase or decrease the heat when there
are no room controllers.
– – gives approx. 1 °C lower room temperature.
– gives approx. 0.5 °C lower room temperature.
+ gives approx. 0.5 °C higher room temperature.
++ gives approx. 1 °C higher room temperature.
> Room temperature influence
▶ Set how much a 1 K ( °C) difference in room temperature should
influence the set point value for the flow temperature.
Example: at a 2 K ( °C) deviation from the set room temperature, the
set point value for the flow temperature is changed by 6 K ( °C) (2 K
deviation * factor 3 = 6 K).
>>> Room temperature exception
The same as when there is a room controller, see above.
>>> Copy to all heating circuits
The same as when there is a room controller, see above.
> Circuit 2, 3... (Circuit 3 option)
Circuit 2, 3... has the same settings options as Circuit 1, (

Chapter 13.2).
13.2.1 SET POINT
The heating circuit's set point value is the temperature of the flow that
the heat pump attempts to maintain. Sometimes, the measured actual
value fluctuates a bit upward and downward depending on changes in
the outdoor temperature or a large hot water demand.
The set point value is normally based on:
• Current curve value (the flow temperature at the current outdoor
temperature according to the applicable heat curve).
• Current curve influence through:
– Room sensor (room controller)
– Holiday
– Active program
– External control
SET POINT VALUE CALCULATION
The set point value for the heating circuit is the current curve value
adjusted with active curve influence, if any such exists.
Priority order for curve influence is:
• External control
• Active program
• Holiday
Only one of these can be active. How big the influence should be and
when to exercise it is set in the respective function.
FIXED SET POINT VALUE
A fixed set point value (not curve-based) applies in the event of:
• External set point value. The set point value is determined according
to input signal 0-10V where 1V is 10 °C and 10V is 80 °C (0V triggers
an alarm).
SET POINT VALUE LIMITATION
The calculated set point value is always checked against the permitted
temperature limits.
The applicable set point value T1 for Circuit 1 and the measured actual
value for T1 are used to activate and deactivate the heat demand.
The following applies to Circuit 2, 3... : When the actual value for the
mixed circuit's T1 is low in relation to the set point value, more heating
water is shunted into the circuit so as to maintain the set point value.
If the flow temperature has been below the set point value for a certain
period of time, there is heat demand and the compressor produces heat
before there is a too significant temperature reduction indoors. This
happens until the flow temperature is a couple of degrees higher than
Factory setting 17.0 °C
Lowest value 10.0 °C
Highest value 30.0 °C
Table 14 Room temperature, exception
Factory setting No
Alternative No/Yes
Table 15 All circuits
Factory setting 20.0 °C
Lowest value 10.0 °C
Highest value 35.0 °C
Table 16 Room temperature, normal
Factory setting =
Alternative – – , – , =, +, ++
Table 17 Room temperature increase/decrease
Factory setting 3.0
Lowest value 0.0
Highest value 10.0
Table 18 Room temperature influence
It always takes some time for a change of a heating
setting, e.g. an increase or decrease in room
temperature, to apply. The same applies in the event of a
quick change of the outdoor temperature. This is why
you should always wait for at least 24 hours before
making a new change.
The set point value specified by the customer/installer is
most often the room temperature, which is recalculated
by the control unit into a corresponding flow
temperature set point value. Under normal conditions, 1
K ( °C) in room temperature corresponds to approx. 3 K
( °C) in flow temperature.