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  1. M

    switch drops

    it should'n be a problem as long as the Zs value for the circuit satisfies the Max Zs value for the protective device for the Circuit. Musa
  2. M

    C&G 2381 16th Edition past Papers

    Plese could anyone send me some past papers as my exam is on 1st of december. Many thanks in advance. Musa ______________________ moderator email address removed, see forum rules
  3. M

    burner keeps burning with Heating off and DHW Off?

    Vaillant VCW GB 242 EH - burner keeps burning with Heating off and DHW Off? Hi gasman Checked the microswitches on the diverter valve and all the pipes to the diverter valve all o.k. Before, the boiler on low flame and the pump, kept running even when the CH was not selected...
  4. M

    burner keeps burning with Heating off and DHW Off?

    Vaillant VCW GB 242 EH - burner keeps burning with Heating off and DHW Off? DHW works fine, Boiler on with tap opened, off with tap closed, but reignites after a few seconds on low flame with CH switched off. As soon the power is applied to the boiler the CH pump comes on the fan runs and the...
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