Operating Instructions and Installation Instructions

ULTRAMAX PB 65 - 120
31 L290 ©MHS Boilers 13/12/2010
10.9 Adjustment of combustion quality
Connect equipment in terms of water,
gas and electricity.
Due to the different ignition features of natural
gas LL and natural gas E, an adjustment of the
gas/air mixture is required.
After ignition, the specified CO2 value
at full load can be adjusted by turning
the adjustment screw (2).
Adjustment of the CO2 value at small
load by turning the adjustment screw (1)
at the gas fitting.
10.10 Adjustment values for Natural Gas.
Natural Gas L / H
Ultramax PB 65-120
Gas connection pressure
Mbar
20
CO2 max
%
8,8 +/- 0,2
CO2 min
%
8,2 +/- 0,2
Minimum and maximum CO2 values must always
have a difference of 0.3%.
10.11 Conversion from Natural Gas to LPG.
For a refitting to an operation using liquid gas,
the following faceplates must be used
Ultramax PB 65
6,0mm
Ultramax PB 85
6,0mm
Ultramax PB 100
6,2mm
Ultramax PB 120
8,0mm
10.12 Adjustment values for liquid gas
1 LPG
Ultramax PB 65-120
Gas connection pressure
Mbar
50
CO2 max
%
9,8 +/- 0,2
CO2 min
%
9,0 +/- 0,2
Minimum and maximum CO2 values must always have a difference of 0.3%.
All adjustments must be made with the aid of a flue gas analyser continually sampling the appliances
products of combustion in the appliances flue, concentric flue adapter or where no other option is
available via the flue gas sensor tapping. (in this case the probe should be inserted 2/3s of the depth
of the heat exchanger.
Faceplate