Bosch AQUA STAR 250SX LP - Manual (Page 33)

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Special adjustment for measuring and adjusting CO2 levels
33
Fig. 43 Adjusting
Leave “Program” mode
B Turn ON/OFF switch in position OFF and then ON
again.
i
NOTE: turning screw clockwise
decreases CO
2
level, turning
counterclockwise increases it.
Caution: Faulty ignition or noisy
operation may occur if CO
2
levels are
adjusted outside the indicated range.