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5.4.3 Air heater
Function (ECO-L):
The air heaters are supplied at maximum flow temperature
from the boiler plant storage system. The fans are con-
nected by switches or controllers provided by the cus-
tomer. The flow rate of the heating water is controlled by
the temperature of the return flow and thus adjusted to
the air heater's thermal output (quantity control). This
produces optimum storage stratification with long-lasting
high temperature on the storage unit flow pipe. The heat-
ing periods (daily and weekly programmes) can be set us-
ing the integrated timer.
Operating modes:
-
Off:
The air heater is switched off
-
Day/Off:
Heating operation according to clocked programme.
During the day the system is adjusted to the set point
value for return flow, and at night it is off.
-
Day:
Adjusted to the set point value for return flow (con-
tinuous operation).
-
Manual:
Pump on; the valve is not controlled (emergency opera-
tion).
(screen number) parameter (factory setting)
(01) Operating mode (Day/Off)
Select operating mode
(02) Number of heating periods (1)
The weekly programme has to be entered in the form of
heating periods. Each weekly programme consists of the
heating day, start and end. A maximum of seven heating
periods is available.
(03) Heating Period 1/Heating days (MON to SUN)
Day or days on which the switching times apply. Select
the heating days with KEYS F1 (for Mon-day) to F7 (for
Sunday). Pressing the button once
selects the day,
pressing the button again
drops the day.
(04) Heating Period 1/Start (6:00)
Time to switch on air heater.
(05) Heating Period 1/End (22:00)
Time to switch off air heater.
(06-23) Heating Periods 2-7
These depend on the number of heating periods (see Mask
2), consisting of heating days, start and end.
(24) Temperature of return flow (60°C)
Desired temperature of return flow
(25) ECOcircuit (YES)
The ECO automatic savings system makes the air heater
switch on and off as required.
(26) Switch off below system temperature (NO)
Should the air heater group be switched off when a mini-
mum system temperature is fallen short of?
(27) Frost protection function (YES)
With the frost protection function switched on, the room
heating unit is turned on when there is a danger of frost.
(28) Carry off excess heat (NO)
If the PYROT is at risk of overheating, there is the option
of the excess heat being carried off. The group adjust to
"Flow temperature/Maximum".
Summary of Contents for PYROT KPT 1250
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