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As far as I can tell there is no Weil model CCW. Please double check the model number or give me a picture of the boiler showing the controls. Also not sure about your "fan center" reference. Do you mean the transformer/relay?
You can post a picture here by clicking on ADD FILES next to the SEND button. BTW I've been installing and servicing Weil boilers for over 40 years and I've never heard of a CCW. The CCW model also doesn't come up in a search of the Weil database.