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  1. Z

    Two quotes for combi boilers for radiant and DHW

    Use bid 1 info line items against bid 2 and vice versa. Your aim is to determine if they overlooked something in their proposal.
  2. Z

    Grundfos Alpha 15-55f stuck in 1 GPM

    Verify the pump water flow direction.
  3. Z

    Navies NCB-240/130H Low Heat

    1)Two heating zones each with its own circulator pump-is a Navien zone control "Two heating zones each with its own circulator pump"-is a Navien zone control operating circulator pumps. Parameter setting could be set incorrectly.
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