Setting Ventilator Mode; Setting The Maximum Heating Time; Reading The Meter Status; Locking The Control Elements - Vaillant aroSTOR VWL BM 270/5 Installation And Maintenance Instructions Manual

8 Adapting the unit to the installation
▶
Press the rotary knob to confirm the selection.
▶
Press the menu button to return to the original display.
8.8

Setting ventilator mode

▶
Turn the rotary knob to set the mode INST.MENU SET
TINGS FAN MODE.
◁
1 = Fan operates only when the heat pump is run-
ning. The fan speed does not automatically adjust to
the heat pump's requirements.
◁
2 = Fan operates only when the heat pump is run-
ning. The fan runs at maximum speed.
◁
3 = Fan operates only if the heat pump is running or if
the external control system permits this (hygrostat)
8.9

Setting the maximum heating time

1. If you switch off this function, the domestic hot water
cylinder charging time is shortened. INST.MENU → SET
TINGS → MAX. TIME.
2. Press the rotary knob.
3. Turn the rotary knob to set the maximum heating time
via the heat pump (Auto /number of hours).
◁
In Auto mode, the product optimises its use of
energy sources (heat pump and back-up heater) in
order to prevent the heating from starting less than
five hours after a low-tariff period has begun.
–
When in the Auto setting, the product only uses
the back-up heater during low-tariff periods and
programmed time periods. The heat pump is
used first. The back-up heater is switched on as
late as possible.
–
If the unit is not connected to the energy sup-
ply company's high-/low-tariff contact, it may not
recognise that the five-hour time period has star-
ted and consequently the Auto function may not
work.
◁
In "Number of hours" mode, the product optimises
its use of energy sources (heat pump and back-up
heater) in order to reach the set temperature within
n hours of the heating starting.
–
The shorter the maximum heating time is set to,
the more often the back-up heater is switched
on and the higher the energy consumption and
consequently the energy costs as a result.
Note
The amount of power available depends
on the load relief level and the time period
(Comfort, Eco, Frost protection, High/Low
tariff) that have been programmed.
4. Press the rotary knob to confirm the selection.
5. Press the menu button to return to the original display.
20
8.10

Reading the meter status

1. If you want to read the product's counter statuses, se-
lect this menu INST.MENU COUN TERS.
2. Press the rotary knob in the COUN TERS menu.
◁
No. 1 = Number of heat pump switching operations
◁
No. 2 = Number of immersion heater switching oper-
ations
◁
No. 3 = Function deactivated
◁
No. 4 = Number of compressor operating hours
3. Press the menu button to return to the original display.
8.11

Locking the control elements

1. Turn the rotary knob until the LOCK ING menu is dis-
played.
–
If the control elements are blocked, you can only
reset the fault codes or unblock the control elements
INST.MENU LOCK ING.
2. Press the rotary knob to confirm.
3. Turn the rotary knob to set the automatic level of lock-
ing.
◁
no = Automatic blocking is not active.
◁
Auto = The control elements are blocked 60
seconds after the last entry. This is how you unblock
the control elements (→ Page 20).
◁
Pro = The control elements are blocked 300
seconds after the last entry. This is how you unblock
the control elements (→ Page 20).
4. Press the rotary knob to confirm the selection.
5. Press the menu button to return to the original display.
8.11.1 Unblocking control elements in the Auto
mode
1. Press and hold the menu button for three seconds.
2. Select the rotary knob YES.
3. Press the rotary knob to confirm the selection.
4. Press the menu button to return to the original display.
8.11.2 Unblocking control elements in the Pro
mode
1. Press and hold the menu button for three seconds.
2. Press and hold the rotary knob and the clock button for
three seconds.
3. Select the rotary knob YES.
4. Press the rotary knob to confirm the selection.
5. Press the menu button to return to the original display.
8.11.3 Manually locking the operator control
elements
1. In the basic display, hold down the menu button and the
clock button for three seconds.
2. Select the rotary knob YES.
3. Press the rotary knob to confirm the selection.
4. To lift manual locking, hold down the menu button for
three seconds .
Installation and maintenance instructions aroSTOR 0020290840_00