Additional protection is provided if the water temperature falls too sharply.
In this case, the outdoor unit is shut down.
Operating principle when the outside temperature falls below
the operating threshold of the outdoor unit
If the outside temperature is below the minimum operating temperature of
the outdoor unit as defined by the parameter HP051, the outdoor unit is
not permitted to operate.
If the system has a demand pending, the back-up or electric boiler starts
up immediately to guarantee heating comfort.
9.5.2
Operation of the switch between heating and production
of domestic hot water
The system does not allow the simultaneous production of heating and
domestic hot water.
The switch logic between domestic hot water mode and heating mode
operates as follows:
Fig.111
MW-5000541-1
1
2
3
4
5
A
A
B
B
B
T
t
Cp
D
Tp
0
A DP048: Minimum heating duration between two
domestic hot water production runs
B DP047: Maximum authorised duration for domestic
hot water production
Cp DP070: Domestic hot water "Comfort" set point
temperature
or
DP080: Domestic hot water "Reduced" set point
temperature
T Temperature
Tp DM001: Domestic hot water temperature (lower
temperature sensor)
DM006: Domestic hot water temperature (upper
temperature sensor)
t Time
D DP120: Set point temperature differential triggering
the domestic hot water tank to be charged
Tab.71
Live
Operating description
1
Domestic hot water production only. When switching on, if domestic hot water production is enabled and
acceleration of domestic hot water production is not required (DP051 set to 0), a domestic hot water pro
duction cycle starts for a maximum duration that can be adjusted and set by the DP047 parameter.
In the event of insufficient heating comfort, the heat pump is running too long in domestic hot water
mode: reduce the maximum duration of domestic hot water production.
2
Heating only. Production of domestic hot water is off. Even if the domestic hot water set point is not
reached, a minimum heating period is forced. This period can be adjusted and defined with the DP048
parameter. After the heating period, tank loading is again enabled.
3
Domestic hot water production only. When the domestic hot water set point is reached, a period in heat
ing mode begins.
9 Settings
88
AWHP-2 PBS-i
7706696 - v04 - 11102018
Содержание PBS-i WH2 Series
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Страница 178: ...1 Spare parts 22 AWHP 2 PBS i 7706697 v04 11102018 ...