Vaillant geoTHERM exclusive Operating Manual page 20

5 Operation
Display shown
DHW loading
Parameters
Operating mode WW Auto
Max. DHW temp. 60°C
Min. DHW temp. 44°C
Cylinder temp. REAL 51°C
>Select set target temperature
HK2
Time programme
>Mon
1 00:00
2 :
3 :
>Select weekday/Block
Table 5.1 Adjustable parameters at the operator level (contd.)
20
Description
For connected domestic hot water cylinders and the
4
circulation circuit the operating modes Auto, On and
Off are possible.
Auto
60°C
The maximum WW temperature determines the
44°C
temperature to which the domestic hot water cylin-
51°C
der should be heated.
The minimum WW temperature determines the
limit below which the domestic hot water cylinder is
heated.
Note: The maximum WW temperature is only dis-
played when the auxiliary hot water heating is ena-
bled.
Without electric auxiliary heating, the WW tempera-
ture is limited by the pressure sensor control shut-
off in the cooling circuit and cannot be adjusted!
Cylinder temp. REAL: Current temperature in the
domestic hot water cylinder.
We recommend that hot water generation be
achieved without the electric auxiliary heating. by
this method, the maximum WW temperature is de-
termined by the high pressure cut-out in the heat
pump cooling circuit. This cut-out corresponds to a
maximum hot water temperature of 58 °C. In order
to keep the heat pump starts to an absolute mini-
mum as low a min. hot water temperature as possi-
ble should be selected.
You can set the heating times for each heating cir-
5
cuit in the HK2-Timer programme menu.
Up to three heating times can be programmed per
day or block. The control system operates according
24:00
to the heating curve and the room setpoint tempera-
:
ture.
:
The set back times can be dispensed with, depending
on the tariff agreement with power company (VNB)
or the construction of the house.
Power companies offer their own discounted tariffs
for heat pumps. It can make sense on economic
grounds to make use of the more favourable off-
peak power.
In low-energy houses (in Germany standard as from
1st February 2002 energy conservation regulation)
the room temperature reduction can be dispensed
with owing to low heat losses.
The desired set-back temperature must be set in
menu 2.
Operating Manual geoTHERM exclusive VWS 0020071929_00
Factory setting
Min. hot water
temp. 44 °C
Mo. – Su.
0:00 – 24:00 hours