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old HYDRONIC UNIT HEATER

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hrlevy
hrlevy Member Posts: 19
in THE MAIN WALL
I am trying to install an old HYDRONIC UNIT HEATER in my garage. The heater will be hung the ceiling joists. Should the hot supply be connected to the top or the the bottom fitting?? Will it make any difference if I use 3/4 or 1 inch pex ?? The pex will be connected to 3/4inch copper.



thank you

Howard

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  • billtwocase
    billtwocase Member Posts: 2,385
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    sounds like a Modine heater

    boiler supply in the bottom, return on top. How many BTU's? If it is 1" tappings, I would use 1". How are you going to mount your aquastat? Something needs to turn on the blower on temp increase
  • hrlevy
    hrlevy Member Posts: 19
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    it's an OLD Fedders

    I plan to turn on fan with same relay as the zone pump.
  • jumper
    jumper Member Posts: 2,258
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    boiler supply in the bottom, return on top

    that is way I was taught. Do the opposite of steam. But I never figured out why.
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