MHS Boilers Ultramax 115, Руководство по эксплуатации и техническому обслуживанию, Страница: 42 / 46

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For example:
Pre-purging takes place when the appliance is enabled.
The same pressure sampling point are used for his adjustment as used hen undertaking the
monitoring of the burner pressure.
Burner pressure = pressure above burner – fan pressure = Pbb – Pvent
Once this measurement has been obtained the pressure switch must be set to a maximum of 80%
(x0.8) of this value.
Following the successful commissioning of the unit the following readings must be recorded onto the
commissioning report and maintained for future reference.
If the appliance is checked in the manner indicated, and corrected as necessary, the following
pressures, at full capacity, must be recorded for reference on the commissioning report note:
P
vent.
P
bb.
P
vent
-P
bb.
(measure separately!) P
vh.
∆T.
8 Maintenance
8.1 Safety
During maintenance activities, always wear suitable clothing and shoes. Consider your own
safety, particularly in respect of jewellery and loose clothing.
8.2 General
In order to ensure continued good and safe operation of the appliance, this must be inspected at
least once per year.
The following activities must be carried out (for an extensive description of these activities, see8.3):
- Renew the ignition and rectification electrodes
- Clean the fan blades
- Clean the condensate trap and the drainage pipe from the appliance
- Inspect all pressure measurement pipes and nipples
- After removing the panels from the left hand side of the appliance, ignition and burning can be
observed via a sight glass
- Test the unit with a flue gas analyser for correct CO
2
and CO settings, both at full and minimum
Capacity.
- Check all the safety functions, and make any necessary adjustments
- Measure the water temperature difference ∆T as a measure of the flow rate
- Check the water pressure
- Check the water quality: hardness and chloride content
- Check the tightness and security of the bolts securing the front and rear inner panels.
- Do not remove the top, front and rear inner panels. Removal of these panels will invalidate the
appliance warranty.