Installation and Service Manual Epsilon-Series
24
8
Boiler controls
The boiler is provided with a fully automatic microprocessor control, called CMS Control
Management System. This control simplifies operation by undertaking all major control
functions. Initially when power to the unit is switched on it will remain on standby. There is
no indication Led on, untill one of the program keys is pressed. The control panel display
will show the relevant state. When the installation is empty the display will show FILL.
The various parameters can be called up in two ways:
The Good-state or standard read out
The first way shows a simple display read out.
The boiler in operation will always show 'Good'. When a message is necessary this will
be shown instead of Good.
Technical read out
The second way is a technical read out. In normal situations the following will be shown:
• on the left the status in which the boiler is active;
• on the right the flow temperature;
• the water pressure in the installation.
When a message (error or blocking code) is necessary this will be shown instead of the
technical read out..
To switch over from the Good-state to the Technical read out (and vice versa):
- Press 5 sec. on the STEP-key.
When the system has been filled the automatic venting program starts, when a program has
been selected, by pressing the key for Central Heating, DHW or pump program (
,
of
). The program takes 17 minutes and stops automatically. After this the unit
will function normally. (See also chapter 9 'Filling and venting the boiler and installation').
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.
If during a call for heating the burner switches off, because the desired heating tem
-
perature is exceeded, then there will be an anti-commuting time in operation for five
minutes. This means that the burner switches on again after 5 minutes if there is still a
call for heating.
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 Depending on the amount of sanitary water which is withdrawn from the DHW
cylinder, the central heating return water temperature, from which the input is adjusted,
will vary.
