Rooftop AC Unit Replacement
Well we have thrown in the towel on our old Coleman Mach unit. After reading a few articles it would appear that replacing the unit will not be all the difficult. From what I understand it basically...
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Unit weights soemthing like 75 or 90 pounds, Forget which.. Just did the job here but was replacing a different make with a coleman
Remove inside grill
Disconnect upper unit from lower unit (Wires, all plug in I think one plug but might be 2) you may need to disconnect a ground lead (one screw)
Remove 4 bolts
Remove rooftop unit, clean mounting area, optional replace gasket (I would suggest you do this, it just sits there, like a throw rug)
Position new upper unit,, This is a 2 person job, only one needs muscles. (One on roof one inside)
Insert 4 long bolts and run down, DO NOT TIGHTEN AT THIS TIME initially.
now evenly tighten the 4 bolts till the indicator (RTFM for location of indicator) indicates proper amount of compression.
Plug plug in
Test
replace ceiling grill and filters.
Tools needed
Screwdriver matching screws holding up ceiling grill (#2 Phillips normally or #2 Square as the option, #20 Torex in my case today)
Wrench Forget size, for long bolts.
Suggestion.. Reversible power drill with adapter and socket for removing those long bolts.. Lots and lots of turns.. How I did it.
Remove inside grill
Disconnect upper unit from lower unit (Wires, all plug in I think one plug but might be 2) you may need to disconnect a ground lead (one screw)
Remove 4 bolts
Remove rooftop unit, clean mounting area, optional replace gasket (I would suggest you do this, it just sits there, like a throw rug)
Position new upper unit,, This is a 2 person job, only one needs muscles. (One on roof one inside)
Insert 4 long bolts and run down, DO NOT TIGHTEN AT THIS TIME initially.
now evenly tighten the 4 bolts till the indicator (RTFM for location of indicator) indicates proper amount of compression.
Plug plug in
Test
replace ceiling grill and filters.
Tools needed
Screwdriver matching screws holding up ceiling grill (#2 Phillips normally or #2 Square as the option, #20 Torex in my case today)
Wrench Forget size, for long bolts.
Suggestion.. Reversible power drill with adapter and socket for removing those long bolts.. Lots and lots of turns.. How I did it.
