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Worcester Greenstore Ground Source Manual

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HEATING, GENERAL
6 720 802 172 (2012/06)10
12 HEATING, GENERAL
12.1 CIRCUITS FOR HEATING
•Circuit 1; the first circuit is included by default in the control unit and
is controlled by the installed flow sensor, can also be controlled with
the optional room controller.
•Circuit 2 (mixed); control of circuit 2 is also included by default in the
control unit but needs to be supplemented with an external mixing
valve, circulation pump and flow sensor and also an additional room
controller - these parts are all available as optional accessories.
•Circuits 3-4 (mixed); control of up to 2 additional circuits is optional.
Each circuit is then fitted with a Multi module, mixing valve, circulation
pump, flow sensor and possibly a room controller, these parts are all
available as optional accessories.
12.2 CONTROL METHODS FOR HEATING
•Outdoor sensor; a sensor is fitted on a north facing outside wall of the
house. The sensor sends signals to the control unit in the heat pump.
Control with an outdoor sensor means that the heat pump
automatically regulates the heating in the house depending on the
outdoor temperature. The customer determines the temperature of
the heating system in relation to the outdoor temperature by setting
the heat curve on the control unit.
•Outdoor sensor and room controllers (one room controller per
circuit is possible); Control with outdoor sensor supplemented with
room controller(s) means that one (or several) controllers are
mounted in specified areas of the property. They are connected to the
heat pump and provide the control unit with information about the
current room temperature. The signal will affect the flow temperature.
12.2.1 LCD ROOM CONTROLLER (ACCESSORY)
The control unit supports up to four room controllers.
Fig. 20 CAN-BUS LCD room controller
THE DISPLAY FUNCTIONS
Fig. 21
[1] Outdoor temperature
[2] Room temperature
[3] Holiday
[4] Extra hot water
[5] Current circuit
The display window shows the current room temperature. When Show
outdoor temperature in room sensor (room controller) is set to Yes
the outdoor temperature is also shown, alternating with the room
temperature. This is valid for all installed room controllers.
In the display window, operating symbols can appear at the bottom right
hand side. The symbol for Extra hot water or Holiday is displayed when
the function has been set in the heat pump.
The room controller display is used to indicate alarms for some alarm
categories (Table 46 ). The display window slowly flashes red until
the alarm has been acknowledged in the heat pump control unit, or been
automatically reset.
SETTING THE ROOM TEMPERATURE WHEN A ROOM CONTROLLER
HAS BEEN INSTALLED
The room temperature can easily be set using the room controller.
▶ Turn the room controller knob to set the desired room temperature for
the circuit. The previous set value is shown with blinking digits.
The display blinks during the setting and stops blinking shortly after
turning of the knob has stopped. The value in the control unit menu
Room temperature normal for the circuit is automatically set to the
same value.
Alternatively the desired room temperature is set via the control unit.
▶ Go to the menu Room temperature normal for the circuit and set the
desired room temperature.
The room temperature value in the room controller for the circuit is
automatically set to the same value.
For Circuit 1 there is one more way to set the room temperature.
▶ Use to set the room temperature in Room temperature normal
( Chapter 13.1).
12.3 TIME CONTROL FOR HEATING
•Program control; The control unit offers a possibility to define two
individual programs for time control of the heating.
•Holiday; the control unit has a program for holiday mode, which
means that during the selected period the room temperature changes
to a lower or higher level. The program also allows switching off hot
water production.
•External control; the control unit can make settings for external
control, which means that the preselected function is performed
when the control unit senses an input signal.
Circuits 2 through 4 cannot have a higher flow
temperature than circuit 1. This means that underfloor
heating on circuit 1 cannot be combined with radiators
on another circuit. Room temperature reduction for
circuit 1 can affect other circuits in some cases.
It is only the room where the room controller is located
that can influence regulation of the temperature for the
relevant heating circuit.
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