Just Finished Houghton A/C Install

[mr.stang]

the end that is now connected to the dometic thermostat

[LRL]

Originally Posted by Rockhead

You will be very pleased with the 9500. I tested ours by pulling it out in 104 degree temp n let it sit for 1 hr windows closed. It cooled our 21 down to around 75 degrees in 15 mins. Super quiet which is so nice when sleeping at night. No more being somewhat woke up by the ac kicking on

So you’ve been happy with the 9500? Its specs say it is made for cooling up to 400 sq ft…slightly smaller than our 21’s, if I’m doing my math correctly. Houghton also makes a 13.5K. Rated up to 650 sq ft of cooling. Sounds like you’d see that as overkill? Thanks!

[Chasing Trials]

Originally Posted by LRL

So you’ve been happy with the 9500? Its specs say it is made for cooling up to 400 sq ft…slightly smaller than our 21’s, if I’m doing my math correctly. Houghton also makes a 13.5K. Rated up to 650 sq ft of cooling. Sounds like you’d see that as overkill? Thanks!

I wonder how many put in the 13.5K, & what sized trailers? You can't get the heat strip in the 9500.

[Rockhead]

We didn’t care for the heat strip in an ac . Ben there and found it not efficient enough. The 9500 cools our 21 down perfectly. The furnace keeps us quite cozy n momma is very cold natured. When have found the need for heat n not have to use the furnace, we use a small oil heater works great.

[sofmerc]

Originally Posted by Chasing Trials

I wonder how many put in the 13.5K, & what sized trailers? You can't get the heat strip in the 9500.

I put the 13,500 in a 5.0....

[rubicon327]

Originally Posted by Chasing Trials

I wonder how many put in the 13.5K, & what sized trailers? You can't get the heat strip in the 9500.

The Houghton units with heating are heat pumps not electric resistance strip heaters. Big difference.

[LRL]

Originally Posted by mr.stang

the end that is now connected to the dometic thermostat

The end connected to the current thermostat only has three black wires: 12+, 12-, and COMM. I gather yours, with the red and blue and black wires, was different?

[mr.stang]

Here is what I had and did. Red at thermostat to blue at air conditioner hole in ceiling. The other blue in air conditioner hole in the ceiling to black back to thermostat.

[LRL]

Originally Posted by mr.stang

Here is what I had and did. Red at thermostat to blue at air conditioner hole in ceiling. The other blue in air conditioner hole in the ceiling to black back to thermostat.

Thank you. Your thermostat wiring appears to be different from my (older) set up.

[LRL]

Originally Posted by mr.stang

There are 2 blue wires in the dometic control box that go to the furnace, pull them from the circuit board. There is another set of black/ red, 2 sets actually, that go from the control box to the thermostat. Connect red to blue, black to the other blue, that is your circuit. A simple furnace thermostat to the other end of the red and black and you are done. Stan

Sorry to keep bugging you, but I think I’m getting closer to figuring this out, and now know better what questions to ask. You note that there are two red wires in the control box. Did you connect BOTH of them to a blue wire to the thermostat, or just the one from the batteries… or does it matter?

From the wiring diagrams I’ve seen there is only one black wire. Does that sound correct?

Thanks for your patience with wiring naïveté!

[mr.stang]

It doesn't matter, there are 2 sets of black and red, I used the heavier gauge. Just making a loop from the thermostat to the heater and back to the thermostat with the thermostat as a switch. Stan

[LRL]

Originally Posted by mr.stang

It doesn't matter, there are 2 sets of black and red, I used the heavier gauge. Just making a loop from the thermostat to the heater and back to the thermostat with the thermostat as a switch. Stan

Excellent! Thank you so much.

[H46Driver]

Originally Posted by mr.stang

It doesn't matter, there are 2 sets of black and red, I used the heavier gauge. Just making a loop from the thermostat to the heater and back to the thermostat with the thermostat as a switch. Stan

I ended up calling Dustin and he talked me through the wiring connections to make the thermostat work. Took him just a couple minutes to explain.

[LRL]

Originally Posted by H46Driver

I ended up calling Dustin and he talked me through the wiring connections to make the thermostat work. Took him just a couple minutes to explain.

I’m going to rely on the local mobile RV repair person. Sadly, none of my wires are colored as described (no blue to be found anywhere). And I don’t understand how to plug the thermostat wires (12+, 12-, and comm) into the alphabet soup on the new thermostat (G,Y, Etc). I’ve blown three fuses trying to do what I thought I understood others had done!

Glad you got it to work for you!

[LRL]

OK. I’m going to take one more stab at at least understanding what these wires do…though as noted, I’m waiting for a professional before I go crazy or blow the trailer up! Posted below are photos of wires going to the control box and photo of the wires attaching to the thermostat. From what I can tell, there are 6 wires at the control box that I may care about when trying to get the heater to work independent of the AC: the two wire plug to the left seems to go to the T-stat, and the 4 wire plug seems to bring power to the control box, and perhaps then off to the heater? The two wire plug (blue) to the right appears to be an external temperature monitor. Anyone who can clearly explain how I can isolate the heater and have it work independent of the AC will win first prize. Extra credit for explaining how to wire the T-stat (which named port does each wire go into: R, G, Y, etc?)with the three available wires noted.

[Chasing Trials]

Originally Posted by JeffreyG

I used Dicor to seal mine. I have a few pictures, but it's kind of before/after since I was pretty busy as the crew hoisted the unit and I didn't take pictures at that time.

I looked up Dicor, & there are a few different use caulks. Which is the right one for put a AC in?