domestic hot water thermostat must be suitable for low
voltage (oating contact).
Thermostat closed (= signal On) = Domestic hot water re-
quirement.
DHW 2
Domestic Hot Water 2
CP Setting CP means circulation pump.
For the corresponding settings, please refer to the descrip-
tion of the circulation pump in the operating manual in-
tended for end customers, found in program section “Do-
mestic hot water” under the section entitled “Circulation“.
h.wCP Setting h.w.CP means that the CP
output will be active during domestic
hot water preparation and switch o
30 seconds after domestic hot water
preparation is complete..
DHW 3
Domestic Hot Water 3
with CP Additional circulation pump runs
during domestic hot water preparation
no CP Additional circulation pump does
not run during domestic hot water
preparation
DHW 4
Domestic Hot Water 4
Sollwert Heat pump attempts to reach the set
setpoint value of the domestic hot
water temperature
DHW 5
Domestic Hot Water 5
with HSP Heating circulation pump runs during
domestic hot water preparation
no HSP Heating circulation pump does not run
during domestic hot water preparation
par HUP Heating recirculation pump operates
parallel with domestic hot water
preparation
DHW+WP max
Maximum running time domestic hot
water preparation + Heat pump
After the set time has expired, the 2nd heat generator in the
domestic hot water preparation energises, but only if this has
been released previously in the heating mode!
Defr cycle max
Defrost cycle time, maximum time
between two defrost processes
Option only possible for L/W devices:
You can nd the time to be set for the relevant L/W device in
the operating instructions. If you do not nd any data there,
the following applies:
page 38, “Overview: Defrost cycle, Air defrost, Flow
Max“
Defrost. Air
Air defrost
Option only possible for L/W devices:
No Air defrost not released
Yes Air defrost generally released above
the set temperature
Approved appliances, see page 38, “Overview: Defrost
cycle, Air defrost, Flow Max“
NOTICE
Setting the hydraulic integration of the buer tank
Mixing circle 1
Mixing circle 1
Setting the functioning of the mixer control
Charge Mixer serves as charger mixer, possibly
for a boiler
A Boiler
B Heat pump
TB1 sensor ow (optional)
Discharge Mixer serves as a control mixer,
possibly for oor heating
TB1 sensor ow (optional)
Cool Mixer serves as a control mixer
for passive cooling function (LWD
reversible active)
No Mixer without function
NOTICE
For reversible LWD MK1 can also be set to “Hz+Cool” or
“Cooling” without the expansion board by using the t-
ter or customer service access. The cooling is controlled via
the return sensor.
Error
Error
with 2hg in the event of a fault in the heat
pump, connected 2 hgs are energised
according to requirements (HW + SW)
no 2hg in the event of a fault in the heat pump,
connected 2 hgs are only energised
if the return temperature < 15 °C
(antifreeze); (only heating)
DHW 1
Domestic Hot Water 1
sensor Domestic hot water preparation is
initiated or terminated via a sensor on
the domestic hot water tank
Thermal Domestic hot water is initiated or
terminated via a thermostat on the
domestic hot water tank
NOTICE
Connect domestic hot water thermostat on the same ter-
minals as the domestic hot water sensor (low voltage). The
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