Viessmann VITOCAL 200-G, Инструкция по установке и обслуживанию

Страница: 137 / 208

With activated power-OFF ("power-OFF: YES") the power supply utility can
switch off the
heat that is being generated by the heat pump . This requires
that the power-OFF contact has been connected (see page 81).
The
heat distribution by the heating circuit pump and the circulation pump for
cylinder heating are not affected by the power interruption.
If power-OFF has been activated, a buffer cylinder must be installed to cover
the periods during which no heat can be generated.
Note
The effect of the power interruption on the instantaneous heating water hea-
ter is determined separately (see page 142).
Access
& "Device settings"
& "Programming"
& "Heat pump"
& "Power-OFF" ("YES"/"NO")
Standard setting YES
Setting range YES/NO
Maximum flow temperature
Setting the maximum heat pump flow temperature.
Access
&
" Device settings "
&
" Programming "
&
" Heat pump "
&
"Max. flow temp." (
1
/
!
)
Standard setting 60 °C
Setting range 25 to 60 °C
Minimum return temperature
Not the heat pump but the instantaneous heating water heater is started when
the actual temperature drops below the minimum return temperature.
The instantaneous heating water heater stays ON until the minimum return tem-
perature has been achieved.
Power-OFF compressor
137
Heat pump control settings
55
92
968
GB
Service