Menu 7.2 - Frost protection of HCW
Setting of frost pro-
tection
7.2 Frost protection HCW
Stop temperature >
Warning temp. >
Number of restarts >
Heat retention >
RPT-X fitted >
15°C
2,0K
2
22°C
No
Menu line
Function
Action
Stop tem-
perature
Selection of return water tem-
perature setting at which the
unit stops and the motor
valve fully opens. See table
below
● Select the required stop tem-
perature
The coldest temperature sensor
(TE-RPT or TE-RPT-X) will be uti-
lised. See the temperatures in
Menu 2.6
Warning
tempera-
ture
Selection of return water tem-
perature setting at which air-
flow is reduced
● Select the temperature rela-
tive to the stop temperature
(ΔT) which will generate a
frost damage warning and re-
duce airflow
Number of
restarts
Up to five restarts may be se-
lected
● Select the maximum number
of restarts permitted in an
hour before an alarm is trig-
gered
Manual reset is activated by se-
lecting “0” for no. of restarts
Constant
tempera-
ture
In the case of a unit being
stopped, a selected "constant
heating temperature" is main-
tained to ensure that the
heating pipes stay warm.
● Select the required constant
heating temperature
RPT-X fit-
ted (acces-
sory)
State if RPT-X is fitted
● If an RPT-X is not required, it
may be removed
MVM/CP
time
Time before MVM valve
closes and circulation pump
stops when stop temp. or
number of restarts has been
exceeded.
● Options:
- 5 minutes
-
∞
(never)
Stop temperature
If the return water tem-
perature does the fol-
lowing within a five-mi-
nute period
and total
number of
restarts
Response
Rises above the constant
heating temperature
> 0
Airflow is increased again to the nor-
mal operating level
3006401-2022-05-04
Starting up the unit for operation
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Содержание EXact2 HMI2-350-TOUCH
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