Atmos Energy HE26 - Manual (Page 10)

temperature and the operation mode can be set with parameters [E] and
[E.] (refer to §7.3).
2.4 PC interface
The controller has an interface for a PC. With a special cable and
accompanying software, a PC can be connected. This provision makes it
possible to follow the behaviour of the controller, the appliance and the
heating system during a long period.
2.5 Test programmes
In the controller, there is provision for putting the appliance into a test
status.
By activating a test programme, the appliance will become active with a
fixed fan speed without intervention of the control functions. The safety
functions remain active though.
Simultaneously press + and – to switch off the test programme.
Test programmes
Description of programme Button
combinations
Display
reading
Burner on with minimum CH
power "service" and "-" “L”
Burner on with maximum
CH power "service" and “+” (1x) “h”
Burner on with maximum
power (set by parameter 4) "service" and “+” (2x) “H”
Switch off test programme "+" and "-" Current
operating
condition
2.5.1 Frost protection
The boiler has provision for protecting its heat exchanger as described
below.
NOTE! However to avoid the condensate freezing, the boiler must be
installed in a FROST-FREE room.
• In order to avoid freezing of the appliance (heat
exchanger), it has an appliance frost protection.
When the temperature of the heat exchanger drops
to 5ºC, the burner will be activated and the pump
will start running until the temperature of the heat
exchanger reaches 10ºC.
Code
7 is given when the appliance frost
protection intervenes (heating heat exchanger).
• When the system (or a part thereof) can freeze, a
frost thermostat should be installed in the area to
be protected. Connect this according to the wiring
diagram. See § 10.1.
Remark
When the appliance is out of action (
- on the service display), the
appliance frost protection is still active. However, there will be no
response to heat demand from an (external) frost thermostat.
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