Hi all,
I think I want to install the second AC unit in the front of my 08 3612 Raptor. I have done some searching on here but cant find the answers I am looking for. If anyone in here has completed themselves or had this done, I would love to here your comments. I am trying to decide which unit is best, does it install in place of the front roof vent or in front of it? Do they make a unit that cuts off the fan when it reaches temp?(I ask this because the front unit does, however, my old Outback did not. Only the compressor cycled) very annoying! Is this something you would recommend doing yourself, or having done at an RV center. Let me say that I teach Automotive Technology so I have no problem with the mechanical or electrical portion of the work. I'm thinking a 13.5K unit will be plenty to take care of the extra heat load on those hot summer days. I know the RV is pre-wired for the unit so if it drops in the same hole the roof vent is in, it should be a simple install.
Thanks in advance for your input and thoughts.
Brent
I suspect that ACs that cut the air fan off use a wall mounted thermostat ( only a guess).
The vent should be removed and the 2nd AC installed in its place.
I have replaced and rewired the rear AC on my rig. Assuming you have 30 amp service on your rig, installing a seperate breaker box with 20 amp breaker and seperate 12 gauge shore power cable would be easiest. If you have a 50 amp shore power cord, the rear vent should be prewired back to the main breaker panel making the install very easy.
If the rear vent opening is prewired with 120V wires, you will need to hunt down where they terminate. Easiest way is the make sure they are dead with power on to the rig. Be very careful doing this. Bare the wires with the shore power unplugged.
If they are hot, just remove the vent and install the AC per instructions provided with the AC. If they are dead, unplug shore power, connect the hot and neutral together where the AC goes and start checking wires with the continuity setting on a multimeter.
If you have no 120V wiring to the vent opening, easiest way would be to run the wires up the wall and across the ceiling in conduit. Much pretty but way more difficult would be to fish wire through the ceiling and down to floor level somewhere.
Too bad you don't live near me. I'd come over and check it out for you. I love this kind of stuff.
PM me if you would like to correspond.
88 Gulf Stream 34' Sun Vista, Ford 460, Edelbrock Perfomer carb, Thorley headers
Ford F-250 crew cab 4X4, 6.0 turbo diesel complete roof rebuild
daughter 15, son 11
US Army Desert Storm vets (both of us)
left: The Ol' Gal right: DW with White Lightnin'
Thanks for the reply. The RV is pre wired for the front unit. There is a box with the 120v power feed about 1 foot in front of the current vent hole. I should be able to feed the units wires thru the ceiling to that box. Now I just need to figure out which unit to get. I was researching the Carrier airV and the Coleman Mach3. I see they offer the Mach3 in a power saving version. This might be helpful if I am trying to run both units on the 5500 Gen.
4 kids (One is my husband, but I sometimes wonder)
8 yr boy,9 yr girl,10 yr girl
01 International 4700
99 Dodge 2500 Quad Long Bed,Cummins,Rhino Liner
98 Lance Squire 4000
06 WW SLC 3505
48 Ford 8N was a rustbucket
52 Ford 8N w/ Sherman 54B HydroHoe
We have a 40' WW, with an Onan marquis 5500 gennie, with a dometic 15k ac from thefactory in the rear. I installed a second dometic 15k in the bedroom which was pre-wired. The Onan manual says the 5500 will run 2 15k ac's, which it does no problem. Super simple install, hardest part was getting the ac on the roof. I used my neighbors forklift in exchange for installing his bedroom ac.
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