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  1. #1
    Seasoned Camper J Maguire's Avatar
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    Anything else necessary for AC install?

    I have a new Mach 15 in box, Coleman Chill Grill and a matching cold only thermostat. My RV is ducted and prewired for another AC already.

    Anything I'm overlooking that I should buy before install day besides some duct tape?
    2021 GD Reflection (150) 5th Wheel 268BH
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    Site Sponsor OurNewEra's Avatar
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    Quote Originally Posted by J Maguire View Post
    I have a new Mach 15 in box, Coleman Chill Grill and a matching cold only thermostat. My RV is ducted and prewired for another AC already.

    Anything I'm overlooking that I should buy before install day besides some duct tape?
    I would recommend using foul tape and not the standard grey duct tape. Duct tape shouldn't be used in HVAC duct work.

    Are you using an RV Airflow to get the air into the ducts? Or will you just be shutting down draft vent?
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  3. #3
    Setting Up Camp
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    Maybe a gasket if the unit doesn’t come with one, I keep a spare one just in case anyway. And dicor (or your favourite) caulking.

  4. #4
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    Quote Originally Posted by J Maguire View Post
    I have a new Mach 15 in box, Coleman Chill Grill and a matching cold only thermostat. My RV is ducted and prewired for another AC already.

    Anything I'm overlooking that I should buy before install day besides some duct tape?
    I am assuming that you are going to put it where there is already an existing vent. If that's the case, I would buy a couple of plastic putty knives at Lowes or Home Depot or wherever, and also have a heat gun (or a 1500 Watt hair dryer handy) to heat up the sealant around the vent on top. My advice is to heat a small area thoroughly, then CAREFULLY start the putty knife peeling up the sealant. Two very important words to remember ......GO SLOW! It's very easy to pull/stretch and sometimes tear the TPO roofing membrane if you get in a hurry. Just take your time and work it slow, using the heat gun or hair dryer. The warmer the outside temperatures are, the easier it will be to remove the sealant. It's still a pain in the rear, but it's doable. Good luck. And when I bought mine and installed it, it DID come with the roof gasket.
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  5. #5
    Seasoned Camper J Maguire's Avatar
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    Quote Originally Posted by Shepstone View Post
    Maybe a gasket if the unit doesn’t come with one, I keep a spare one just in case anyway. And dicor (or your favourite) caulking.
    Dicor is handy but shouldn't need it per instructions does come with a gasket in the box though.
    2021 GD Reflection (150) 5th Wheel 268BH
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  6. #6
    Seasoned Camper J Maguire's Avatar
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    Quote Originally Posted by OurNewEra View Post
    I would recommend using foul tape and not the standard grey duct tape. Duct tape shouldn't be used in HVAC duct work.

    Are you using an RV Airflow to get the air into the ducts? Or will you just be shutting down draft vent?
    I was at least thinking foul tape when I wrote duct tape. Thanks for catching that. It's a ducted unit so just shutting down the manual vents.
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

  7. #7
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    Quote Originally Posted by J Maguire View Post
    I have a new Mach 15 in box, Coleman Chill Grill and a matching cold only thermostat. My RV is ducted and prewired for another AC already.

    Anything I'm overlooking that I should buy before install day besides some duct tape?
    If your AC is not setup for a thermostat you will need a relay control box that mounts in the plenum of the AC. Also if you don't have a low voltage wire in the opening you will need one. Mine only had the 120 volt wire.

  8. #8
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    Quote Originally Posted by Hokensalem View Post
    If your AC is not setup for a thermostat you will need a relay control box that mounts in the plenum of the AC. Also if you don't have a low voltage wire in the opening you will need one. Mine only had the 120 volt wire.
    And that low voltage wiring would be 12VDC.
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  9. #9
    Seasoned Camper J Maguire's Avatar
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    Quote Originally Posted by Hokensalem View Post
    If your AC is not setup for a thermostat you will need a relay control box that mounts in the plenum of the AC. Also if you don't have a low voltage wire in the opening you will need one. Mine only had the 120 volt wire.
    Thermostat wire is in the wall waiting patiently.
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
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  10. #10
    Seasoned Camper J Maguire's Avatar
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    Quote Originally Posted by Hokensalem View Post
    If your AC is not setup for a thermostat you will need a relay control box that mounts in the plenum of the AC. Also if you don't have a low voltage wire in the opening you will need one. Mine only had the 120 volt wire.
    Pre-wired thankfully.
    2021 GD Reflection (150) 5th Wheel 268BH
    2019 F250 Gas 6.2L V8 FX4 Crew Cab
    PullRite 2100 20K Hitch w/ LOCKED OUT Turning Point
    2x Honda EU2200i Generators & 1UP Bike Rack & Roll-N-Lock Bed Cover
    Previous Setup:
    2017 Outdoors RV 23BHS
    2017 F150 Sport 3.5L V6 EcoBoost

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