8
7
Heating up unit
In order to provide a fast supply of domestic hot water, a so-called tap comfort function
has been installed in the unit. This function keeps the heat exchanger at the right
temperature (it can be set, see par. 7.2). The tap comfort function has the following
settings:
•
On:
( LED on)
The tap comfort function of the unit is continuously switched on.
The unit always immediately provides warm water.
•
Eco:
( LED on) The tap comfort function of the unit is self-learning
. The unit will
adjust to the usage pattern of the domestic hot water. This means the heat
exchanger will not be kept warm during the night or during longer absences.
•
Off:
(Both LEDs off)
The heat exchanger is not kept warm which means the supply
of domestic hot water takes a bit of time. If there is no need for fast delivery of
domestic hot water, the tap comfort function can be switched off.
In the settings "on" and "eco" , the unit meets the requirements of the Gaskeur
[Gas Inspection] CW standards.
2.4
PC Interface
The boiler controller is provided with an interface for a PC. A PC can communicate with
the CH boiler by means of a special dongle, and the associated software. This facility
enables you to follow the behavior of the boiler controller, the unit and the heat
installation over a long period.
2.5
Test programs
There is an option in the boiler controller, to bring the unit into a test status.
Activating a test program, will switch on the unit with a set fan rotations per minute,
without the control functions intervening.
The safety functions do remain active.
The test program is ended by pressing and simultaneously.
Test programs
Description of program
Button combination
Display reading
Burner on with minimum DHW
capacity (see parameter d par. 7.2)
and
"L"
Burner on with set maximum CH
power (see parameter 3 par. 7.2)
and (1x)
"h"
Burner on with maximum DHW power
(see parameter 3 par. 7.2)
and (2x)
"H"
Switching off test program
and
Current operation
situation
During test mode the following data can be read :
• By pressing the + button continuously in the display the CH water pressure is shown.
• By pressing the - button continuously in the display the ionisation current is shown.
2.5.1
Frost protection
•
The unit is fitted with frost protection in order to prevent it from
freezing. If the temperature of the heat exchanger drops too low,
the pump will start running until the temperature of the heat
exchanger is sufficiently high. If the frost protection intervenes, code
7
will be displayed (heating up exchanger).
•
If the installation (or a part thereof) can freeze, the coldest place
should be fitted with an (external) frost thermostat on the return pipe.
This must be connected in accordance with the electrical diagram
(see par. 9.2).
Note
When the unit is switched off (
-
on the service display), the unit frost protection will
remain active, however a heat request from an (external) frost thermostat will be ignored.
