Atmos Energy HE26 - Manual (Page 39)

T supply °C 7.6 Weather-dependent control
When the outside sensor is connected, the supply temperature is
automatically controlled dependent on the outside temperature in
accordance with the set control line.
The T set CH (= CH supply temperature) is set via the temperature
display. If required, the control line can be adjusted by the service code.
See § 7.3.
X.
T outside °C
Y. T supply °C
A. factory setting
B. example
7.7 Conversion to other gas type
T outside °C
CAUTION
Activities on the gas-containing parts should only be
executed by a qualified registered installer.
When the appliance is connected to another gas type than the type for
which the manufacturer has set the appliance, the gas setting ring must
be replaced. Conversion sets for other gas types can be ordered.
Conversion of the gas setting ring
1. Switch off the electrical supply to the appliance .
2. Close the gas tap.
3. Remove the front cover of the appliance.
4. Disconnect the coupling (1) above the gas valve and turn the gas
mixing pipe (2) backwards.
5. Replace the O-ring (3) and the gas setting ring (4) by the rings of
the conversion set.
6. Reassemble in reverse order.
7. Open the gas tap.
8. Check the gas connections for tightness/ leaks.
9. Switch on the electrical supply to the appliance.
10. Change the parameters c and F to the values given in the table.
11. Now check the setting of the gas/air ratio. (See below)
12. Attach a sticker of the set gas type over the existing sticker on the
gas mixing pipe (2).
13. Apply a sticker of the set gas type at the appliance plate.
14. Remount the front cover of the appliance.
7.8 Gas-air control
The gas-air control is set in the factory and normally does not need any
adjustment.
The setting can be checked by measuring the CO
2
percentage in the
flues or by measuring the pressure difference.
In case of any alterations, replacement of the gas valve or conversion to
another gas type, the control must be checked and reset if necessary
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