Service Manual

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Combustion – Gas Power Adjustment Parameters
The adjustment of the appliance for minimum (P2) / maximum (P1) power operation may be needed
under the following conditions:
- Gas valve replacement – run the U1 and U2 to find L1 / L2 values according characteristic of
new gas valve;
- Fan replacement – use flue gas analyzer as described in manual to find correct setting of A1 /
A2 (air flow);
The following image indicates the 2 measurement points to be used:
Figure 46 – P1 / P2 deltaP Measurement Points
Technician Level
Comments
NOT USED
Range of value in control unit is from
0 to 40
Spare part default setting is 20
Table 16 – P0
The P1 mode can be accessed in the service mode, depending on the adjustment and/or
confirmation need.
B) Gas Pressure
Measurement Point
Measurable values:
- P
burner
A) Fan Pressure
Measurement Point
Measurable values:
- P
air
C) Pressure Tee
(Field Supplied)
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