15
6.4.2 Utility water heater
Function:
-
ECO-B1
When the temperature of the utility water
drops, it is reheated by the built-in heat ex-
changer from the heat accumulator (hydraulic
switcher). The condition for this is a relevant
difference in temperature (choice of control
according to temperature difference or fixed
temperature).
The heating periods (daily and weekly pro-
grammes) can be set using the integrated
timer.
-
ECO-B2
When the temperature of the utility water
drops, it is reheated by the built-in heat ex-
changer from the heat accumulator (hydraulic
switcher). The condition for this is a relevant
difference in temperature (choice of control
according to temperature difference or fixed
temperature).
The flow rate of the heating water is controlled
by the return temperature (quantity control).
This produces optimum storage stratification
with long-lasting high temperature on the stor-
age unit flow pipe.
The heating periods (daily and weekly pro-
grammes) can be set using the integrated
timer.
Operating modes:
-
Off:
The utility water heating system is switched off.
-
Timer:
Utility water heating following clocked pro-
gramme. (The boiler is only warmed up during
the heating period.)
-
On:
The boiler is heated up when prompted for
heat and when there is sufficient system tem-
perature.
-
Manual:
Pump on; the valve is not controlled (emer-
gency operation).
(mask number) parameter (factory setting)
(01) Operating mode (timer)
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
Æ
selects the day, pressing the button again
Æ
drops the day.
(04) Heating Period 1/Start (6:00)
Start, clearance, utility water heating.
(05) Heating Period 1/End (22:00)
End, clearance, utility water heating
(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 utility water (60°C)
Set the desired temperature of the utility water.
Additional parameters for ECO-B2
(mask number) parameter (factory setting)
-
Temperature of return flow __°C higher
than the temperature of the utility water
(20°C)
Desired set-point temperature of return flow:
actual boiler temperature plus the amount set
here.
Summary of Contents for KOB PYROT SERIES
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