Atmos Energy INTERCOMBI HE32 - Manual (Page 36)

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6.2 Commissioning of the appliance
After having carried out the above operations, the appliance can be commissioned.
1. Switch on the electrical supply to the appliance.
The appliance may carry out a self-test as determined by the controller:
2 (on service display).
After completing the self-test, a horizontal mark will appear in the service
display:
- .
2. Press the on/off button in order to put the appliance into operation.
The boiler is heated and on the service display appear 3 , 4 , 7 .
3. Set the pump position on the basis of the set maximum power and the
resistance of the system on the water side. For the head of the pump and the
pressure loss of the appliance, see § 7.5.
4. Set the room thermostat higher than the room temperature. The appliance
will now switch to CH operation: 5 on service display.
5. Heat the system and the appliance to about 80ºC.
6. Check the temperature difference between the supply and return of the
appliance and the radiators. This should be about 20°C. At this stage set the
maximum power on the service panel. See Setting of maximum power. If
necessary, change the pump position and/or the radiator valves. The
minimum flow-through is:-
• 200 l/h at a set power of 7.0 kW
• 750 l/h at a set power of 26.2 kW
7. Switch off the electrical supply to the appliance.
8. De-aerate the appliance and the system after cooling down. (fill up if
necessary)
9. Check the heating system and the hot water supply for proper operation.
10. Instruct the User about filling, de-aerating and the operation of the heating
system and the hot water supply.
Remarks
•
The appliance has been provided with an electronic controller that ignites
the flame and continuously monitors this at each heat demand from the
heating system or from the hot water supply.
• The circulation pump starts running at each heat demand of the boiler. The
pump has an overrun time of 1 minute. The overrun time can be changed if
necessary. See Installer settings.
• The controller will automatically run the pump for 10 seconds, once every 24
hours, to prevent it from getting stuck. This activation of the pump takes
place at the time of the last heat demand 24hrs later. In order to change this
time, set the room thermostat higher for a while at the desired time.
• The pump does not run for hot water supply.
• Step modulation is set to function (factory setting) so that the power/speed
is increased gradually from the minimum (parameter c). This provides the
best CH operation. However if the appliance is being used only for heating
an indirect hot water tank or for heating fan convectors, the step modulation
can be turned off. The appliance will then start almost immediately at the
maximum setting and the system will heat up faster.