Operating Instructions and Installation Instructions

ULTRAMAX PB 65 - 120
39 L290 ©MHS Boilers 13/12/2010
14.0 Backlight
Upon activation of any button, the backlight is activated for a period of approx. 8 minutes.
15.0 Maintenance and Service
Trained and authorised personnel only must perform maintenance and cleaning. Said personnel shall bear all
responsibility for their proper implementation.
Important
Equipment must be isolated from the Electrical supply, Gas supply, flow and return supplies before
commencing any maintenance or service work.
Maintenance shall be performed once a year. The cleaning of the heat exchanger can be avoided in case of
minor dirt accumulation but must be performed at least every 2 years.
Measurement and assessment of specified emission values.
Turn off heating main switch and secure against accidental turning on, or separate all poles of
equipment.
Turn off gas valve.
Dismount equipment panels.
Disassemble blower, gas valve and burner unit.
Remove ignition cable. Check ignition plug for cracks and moisture (moist/wet ignition plugs do
cause error messages – replace ignition plug if necessary).
Visual inspection of burner (clean with paint brush / nylon brush if necessary (.
Visual inspection of blower and Venturi tube (clean with paint brush / nylon brush if necessary)
Remove combustion chamber insulation.
Rinse heat exchanger with clean water (remove stubborn dirt accumulations with a thin plastic brush,
then rinse).
Clean out siphon and fill with water prior to reassembly.
Check and correct gas pressure monitor (10 mbar), if necessary.
Check all condensate-bearing parts for leaks. Remove any leaking condensate or other moisture.
Check all fastener bolts, replace if necessary.
Check system pressure, expansion container and safety valve.
Disassembled seals for gas and water-bearing parts must be replaced with new one upon
reassembly. This is especially true for O-rings at the gas valves and all burner seals.
Reassemble equipment ready for use.
Re-open gas line and check for leaks.
Turn on heating main switch.
Perform functional check, including emission measurement.
Adjust values to factory specifications.