Baxi Power HT Series - SINGLE GAS VALVE MODELS (POWER HT 1.850 AND 1.1000) FIGURE 12 a; DOUBLE GAS VALVE MODELS (POWER HT 1.1200 AND 1.1500) FIGURE 12 b

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910.001.1 - EN
ISTRUCTIONS PERTAINING TO THE INSTALLER
13.1 SINGLE GAS VALVE MODELS (POWER HT 1.850 AND 1.1000) FIGURE 12a
Proceed as follows to adjust the single gas valve:
• Insertthefumeanalysisprobeintothefumesamplingholeasinstructedinsection17(gure15).
• Switchontheboiler,activatingthe“settingfunction”fromthecontrolpanelbypressingandholdingthe
and keys simultaneously until the symbols are displayed, positioned as illustrated in gures
13a and 13b.
• Pressthe key to set the maximum heat output, with the display showing 100% (gure 13a).
Caution: in the event of the boiler failing to ignite, or when replacing the gas valve, the recommended
procedure is to tighten the adjuster screw (V) fully and then back off 3 turns, repeating the steps
described above.
• Turn the gas valve adjuster screw V so as to set the CO
2
values as indicated in table 2.1 for natural gas (G20)
and in table 2.2 for propane (LPG):
- Turn the screw anti-clockwise to increase the CO
2
level.
- Turn the screw clockwise to decrease the CO
2
level.
• Pressthe key to set the minimum heat output, with the display showing 0% (gure 13b).
• Turn the gas valve adjuster screw K so as to set the CO
2
values as indicated in table 2.1 for natural gas (G20)
and in table 2.2 for propane (LPG):
- Turn the screw clockwise to increase the CO
2
level.
- Turn the screw anti-clockwise to decrease the CO
2
level.
Proceed as follows to adjust the double gas valve:
• ConnectapressuregaugetotheP1OUTpressuremeasurementholeonvalve1.
• Inserttheprobeoftheuegasanalyzerinthesamplingportasindicatedinheading17-gure15.
• Switchontheboiler,activatingthe“settingfunction”fromthecontrolpanelbypressingandholdingthe
and keys simultaneously until the symbols are displayed, positioned as illustrated in gures
13a and 13b.
• Pressthe key to set the maximum heat output, with the display showing 100% (gure 13a).
Caution: in the event of the boiler failing to ignite, or when replacing the gas valves, the recommended
procedure is to tighten the adjuster screws (V1) and (V2) fully and then, depending on the model, back
off 2¼ turns (POWER HT 1.1200) or 2½ turns (POWER HT 1.1500), repeating the steps described above.
• Turnbothgasvalveadjusterscrews(V1)and(V2)soastosettheCO
2
values as indicated in table 2.1 for
natural gas (G20) and in table 2.2 for propane (LPG):
- Turn the screw clockwise to decrease the CO
2
level.
- Turn the screw anti-clockwise to increase the CO
2
level.
• Pressthe key to set the minimum heat output, with the display showing 0% (gure 13b).
• TurntheadjusterscrewK1ofgasvalve1soastosetthepressurevalue(Pout)asindicatedintable2.1
for natural gas (G20) and in table 2.2 for propane (LPG):
c. Turn the screw clockwise to increase pressure (CO
2
increasing).
d. Turn the screw anti-clockwise to decrease pressure (CO
2
decreasing).
13.2 DOUBLE GAS VALVE MODELS (POWER HT 1.1200 AND 1.1500) FIGURE 12b