VITODENS 200 WB2A - Heatingspares247.com

9 Replacement of Parts9.7 Air Pressure Switcha) Gain access to the relevant components by following steps (b) and (c) insection 9.1.b) Pull the electrical cable connector from the pressure switch (B).c) Disconnect the plastic sensing pipes from the pressure switchd) Release the two screws securing the pressure switch to the gas/air supplyduct and remove the pressure switch.e) Replace the pressure switch in reverse order ensuring that the pipes are notinterchanged.f) Finally, ensure that the outer casing is secured in position and carry out acombustion check as in 5.6.9.8 Spark Generatora) Gain access to the relevant components by following steps (b) and (c) insection 9.1b) Pull off the electrical mains leads and HT leads from the spark generator.c) Release the two 4mm socket head screws securing the spark generator to theburner door casting and remove the spark generator.d) Finally, ensure that the outer casing is secured in position and carry out anignition check.9.9 P.C.Ba) Gain access by following step 9.1(b).57