Intergas Heating Ltd
13
4.6
Test programs
The boiler controller has a facility for placing the appliance in test mode. Activation of a
test program will result in the appliance starting operation at a fixed fan speed, without
the control functions being actuated. The safety functions do remain active. The test
program is ended by pressing the and simultaneously or will end automaticaly
after 10 minutes.
Test programs
Program description
Button
combinations
Display reading
Burner on at minimum power
and
“L”
Burner on with maximum CH power
setting (See § 10.3, parameter 3)
and (1x)
“h”
Burner on with maximum DHW power
(See § 10.3, parameter 4)
and
(2x)
"H"
Switch off test program
and
Actual situation
Addition readings :
During test mode the following data can be read :
•
By pressing the button continuesly in the display the CH water pressure is shown.
•
By pressing the button continuesly in the display the ionisation current is shown.
4.7
Frost protection
FROST PROTECTION
To prevent freezing the appliance is equipped with an internal frost
protection. If the heat exchanger temperature falls too low, the burner
switches on and the external pump runs until the heat exchanger
temperature is sufficient. When the appliance frost protection is
activated the symbol code
7
7
7
7
is displayed (pre heating the heat
exchanger).
If the installation (or a part of it) is in danger of freezing, an (external)
frost thermostat must be fitted to the return line at the coldest location.
This must be connected in accordance with the wiring diagram
(See § 8.2.1).
Note
If the appliance is out of operation (
-
on the service display) the appliance ’s internal frost
protection is still active. However, this means there will be no response to a request for heat
from an (external) frost thermostat.