Installation instructions E-SHR series page 15
8
Boiler controls
The boiler is provided with a fully automatic microprocessor
control. This control simplifies operation by undertaking all
major control functions. Initially when power to the unit is
switched on it will remain on standby. The control panel
display will show the relevant state. The various parame-
ters can be called up in two ways:
The
state.
In this state the display will show
during all normal
operating functions of the appliance. Should a fault
develop this will be shown on the display.
The technical read out.
Start from the
state by pressing the Step key for
5 seconds. Returning from this to the
display is
done in the same way. From the technical read out a more
extensive read out can be obtained e.g. the boiler flow
temperature and the water pressure in the central heating
system.
When the system has been filled and the automatic venting
program starts, when a program has been selected, the
program takes 15 minutes and stops automatically. After
this the unit will function normally.
On a call for heating or hot water the control system will
select the required water control temperature. This water
temperature is called the T-set value. On a call for central
heating the boiler ignites first at low input. The input is then
changed slowly to match the load required. The boiler
operates in this way to avoid excessive water noises and
temperature overshoot. On a call for hot water supply the
T-set value of central heating return water temperature is
monitored. Depending on the amount of sanitary water
which is withdrawn from the DHW facility, the central
heating return water temperature, from which the input is
adjusted, will vary.
8.1 Explanation of the function keys
Key functions from the
and the extensive
indication are:
-
Central Heating program key, see chapter 9.1;
-
Hot Water program key, see chapter 9.2;
-
PC program key, adjusts the pump to continuous
water circulation in the central heating system, or
according to the pump overrun times on the relevant
programs;
- Step key, after briefly pressing, the water pressure
can be retrieved and pages per chapter can be
retrieved. After pressing for 5 seconds it switches from
indication to technical indication and the other
way round;
- Mode key, after briefly pressing, a selection of the
data chapters can be retrieved. After pressing for 5
seconds it is possible to enter the code as described
in chapter 9.3;
- Reset key, after briefly pressing, for:
unlocking errors;
ending the access code;
ending the automatic venting program, only when the
access code is entered and the reset key is pressed
briefly.
After pressing for 5 seconds an operating stop is
made, for example, for activating the automatic
venting program.
Other key functions from the other indications are:
-
Central Heating key then has the + function;
-
Hot Water key then has the - function;
-
PC key then has the store function, which means
that by means of this key a modified setting is
confirmed;
- Step key for scrolling in a data chapter.
