Worcester Greenstore 6kW, Instruction Manual, Page: 21 / 36

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Commissioning the heat pump
Temperature settings
Proceed as follows to access the temperature settings for the heating on
Customer level 2:
1. Press the Temperature button until Access = CUSTOMER2 is
displayed.
2. Press the Menu button.
3. Press the Select button and scroll through the menus using the
menu dial.
Fine-tune the heat curve
The heat curve can be adjusted in increments of 5°C. For example, you
can make a hump in the curve at 0ºC. Navigate to menu 1.3, press Select
and turn the menu dial until 0°C is displayed in the upper left part of the
menu. Press Adjust and turn the dial to increase or decrease the return
temperature. The change must not exceed 1 - 2°C. Press Save and wait at
least 24 hours prior to any further adjustment. The purpose of breaking
the curve is to be able to influence the heat pump’s heat production at
extra sensitive outdoor temperatures.
Room sensor influence
The menu is only shown for heat pumps which have a room sensor
installed. This menu is used to set how much the room sensor should
influence the heat curve. A higher value will have a greater effect. The
room sensor only fine-tunes the heat curve. Consequently, it is important
that the basic setting of the heat curve’s slope and fine-tuning are
correct.
Holiday mode
The menu is only shown for heat pumps which have a room sensor
installed. The holiday function gives the possibility to choose a number
of days when the room temperature will be lowered to 15ºC (the
temperature is not adjustable). When the days have passed the heat
pump returns to the normal heating setting. Hot water production is not
affected by the holiday function.
Remote control
This is not currently available in the UK.
Summer disconnection
This function disables the heating when the outdoor temperature rises
above the set value.
Menu displays which may need adjustment
or checking
Temperature settings
Set the hysteresis for heat pump on/off switching on the return sensor
T1 (GT1). A lower value gives a shorter range between start and stop.
Less than 5ºC should be avoided.
Set the neutral zone for the mixing valve in a heating system with two
heat curves. In the neutral zone the mixing valve receives no signal to
open or close. Only applies when the sensor T4 (GT4) is connected.
Set the maximum temperature in the mixing valve circuit. Set a
maximum temperature for the underfloor heating system if applicable.
On delivery of the heat pump the value is 60ºC. Only applies when the
sensor T4 (GT4) is connected.
The heat pump is from factory preset to minimum temperature of heat
transfer fluid (collector) ±0°C inlet and -2°C outlet. If anti-freeze liquid
with a freezing point of -15°C is used, the heat pump can operate at
outdoor temperatures down to -5°C. The preset values must be changed
during commissioning. The settings in menus 9.4 and 9.5 must be
changed to -7°C and -10°C respectively.
Hot water settings
Set the temperature in the hot water cylinder. Only applies when the
sensor T3 (GT3) is connected.
Set the hysteresis for the hot water temperature. The function measures
below and above the value set in menu 2.3. Only applies when the sensor
T3 (GT3) is connected. Less than 4ºC should be avoided.
Clock setting of electric heater
The control unit can be set so that the electric heater is fully blocked
during certain periods of the day. Read more under the heading Extra
functions (Customer level 2)/Timer control about how to set the control
unit.
Commissioning/Service
Make a check of all the functions before commissioning the heat pump.
Manually start and stop the pumps and valves from the menu Manual
operation of all functions.
Set when the electric heater should be activated. On delivery the heat
pump is set to activate the heater when necessary. Choose between Yes
or No. If No is chosen, the electric heater only engages during alarms,
extra hot water and hot water peaks.
The function ‘Fast restart’ avoids having to wait for the normal restart
time to start the heat pump. If there is a need for heating or hot water the
heat pump starts within 20 seconds. The setting must be repeated each
time a fast restart is made.
Extra functions - Customer level 2
TECHNICAL INFORMA
TION
FOR THE USER
FOR THE INST
ALLER
TECHNICAL INFORMA
TION
FOR THE USER
FOR THE INST
ALLER
Main menu
Indoor temperature
settings 1
Return Select
Temperature settings
Heat curve
fine-tuning 1.3
Return Select
Temperature settings
Setting of room
sensor infl 1.11
Return Select
Temperature settings
Setting of holiday
function 1.12
Return Select
Temperature settings
Remote control
temperature 1.13
Return Select
Temperature settings
Setting of summer
disconnection 1.14
Return Select
Commiss./Service
Fast restart
of the heat pump 5.6
Return Select
Temperature settings
Heat curve
hysteresis 1.4
Return Select
Temperature settings
Mixing valve curve
neutral zone 1.8
Return Select
Temperature settings
Mixing valve curve
max at GT4 1.9
Return Select
Commiss./Service
Manual operation
of all functions 5.3
Return Select
Commiss./Service
Select function
add.heat yes/no 5.5
Return Select
Hot water
Setting of
temperature.
Return Select
Hot water
Setting of
DHW hysteresis 2.4
Return Select
Clock setting
Add heat prog. time
accord. to clock 4.2
Return Select