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    quade's Avatar
    quade Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 22, 2007, 12:51 AM
    Adding a-c to a lennox g-8 furnace
    Hi I am adding air- conditioning to a lennox g-8 furnace . The fan only has one speed and the transformer is very old in this furnace. I have purchased a fan centre . I am just condering could I have put in a relay instead. Or is it just better to go with a fan centre considering that it has a new transformer and a relay in it already and will switch the fan in cooling mode . This unit also has a standing pilot does the pilot need to be lit to send a millivolt signal back to the gas valve in order to send 24v through the control circuit. Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 22, 2007, 01:42 AM
    No it should not. Follow the directions that came with the fan center. Your blower motor may not have enough horse power to move enough air for the new A/C. I would recommend a professional to braze the lines and make the final connections and check out.
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