Convert back to Dometic CCC2

[ASU777]

Hello,

For those of you with older coaches and Penguin ACs, has anyone converted a replacement unit with the CCC kit and then back to CCC2 at a later time?

I didn't do the conversion of the replacement unit but my understanding is I only need a new thermostat, CCC2 board, and a new ambient sensor as the new style sensor was cut/removed during the initial conversion. The instructions also describe a few flag connectors that were cut/removed that I assume will need to be crimped on a few cut wires.

I'm replacing the remaining original heat pump soon and want to take this opportunity to change out the thermostat at the same time. My luck is that the thermostat will fail at some point and I'll need to convert two units to CCC2 because the original thermostat is no longer available.

Thanks

Bill

[Luv2go]

Yes, I did exactly that. Fortunately I had disconnected and saved the ambient sensor and board so was able to re-use them. IIRC the medium fan speed wire had to be cut/insulated but as you say it was easy to crimp a new Faston on, there may have been more.

[ASU777]

Originally Posted by Luv2go

Yes, I did exactly that. Fortunately I had disconnected and saved the ambient sensor and board so was able to re-use them. IIRC the medium fan speed wire had to be cut/insulated but as you say it was easy to crimp a new Faston on, there may have been more.

Thanks. I think a dealer installed the unit for the previous owner and haven't found anything tucked away with other spare parts left for me.

I reached out to Dometic to see if I can buy these parts new. Can't find any part numbers so far. I'll reply back here if I get them. I imagine this will be coming up more often as the years go on.

["007"]

New seal for base of the new AC to air ducts needs to be ordered, all AC info is in QT's 1 & 2.

[ASU777]

]New seal for base of the new AC to air ducts needs to be ordered

Thanks for the reminder. I bought Newmar part #52715 for my Dometic Penguin 651816 15K BTU heat pump.

Dometic also responded:

CCC2 Board - 3312022.000
Ambient Sensor 26" - 3311731.000

[ASU777]

I've got some photos, wiring diagrams, and notes on the Penguin II conversion back from CCC to CCC2. I'll post them after everything is tested and verified to be correct. It was not that bad. After replacing the ambient sensor, there's just one modification for the reversing valve which operates differently on the new units, and a yellow wire that was capped and it's not clear if it even used.

I'm working on replacing the remaining original AC right now. Two questions if anyone knows for a Penguin II on a brite-tek rubber roof.

I have been looking at QT3 and this doc:

https://comnet2.newmarcorp.com/insta...s/SS2011AC.pdf

- I thought I would have to remove the 14x14 gasket installed by Dometic and replace it with the one I bought from Newmar. The Newmar doc doesn't specify it must be replaced unless it was previously used. They seem to look the same. Does anyone know?

- I have found conflicting information about whether silicone is needed between the roof and the gasket. My old AC did not have any sealant here. The doc doesn't specify any sealant as well. I'd rather be safe than sorry. Any downside to adding the silicone or dicor self-leveling sealant other than more effort to remove it later?

Thanks

[Spk64]

Originally Posted by DSBill

.........
- I thought I would have to remove the 14x14 gasket installed by Dometic and replace it with the one I bought from Newmar. The Newmar doc doesn't specify it must be replaced unless it was previously used. They seem to look the same. Does anyone know?

- I have found conflicting information about whether silicone is needed between the roof and the gasket. My old AC did not have any sealant here. The doc doesn't specify any sealant as well. I'd rather be safe than sorry. Any downside to adding the silicone or dicor self-leveling sealant other than more effort to remove it later?

Thanks

On your gasket is there a piece that goes in the middle like attached picture?
This is a Newmar only item.


When I replaced one of the AC units it had silicone sealant between gasket and roof. Most of what I read said no sealant. I installed without and did not like the way it was sitting. Pulled unit back up and added sealant just like the original install. No problems since this was done earlier this year.

My thread on replacing the unit. http://www.irv2.com/forums/f103/repl...dp-453259.html

[ASU777]

Originally Posted by Spk64

On your gasket is there a piece that goes in the middle like attached picture?
This is a Newmar only item.

Yes, I have that piece. I also have a new 14x14 square from Newmar as well. This might end up being a spare it seems. I ordered the kit that included both items plus small gasket squares presumably for the bolt connections.

Your thread is excellent and I've been looking at it. From the pic, it looks like you took off a Duo Therm (the sticker on the bottom) and replaced it with a Penguin II. Is that right?

I was thinking that explains why you had existing silicone and I did not. My original was an old Penguin from 2002. Either way, I am inclined to follow your approach unless there's something unique about the older DSDPs that originally used Penguin heat pumps with rubber roofs. I'd really like to use dicor around the gasket but lining that up would be tough.

[Spk64]

I placed the unit in place dry marked the roof. Tilted unit over and was generous in the amount of silicone I put down. Tilted it back down watching my marks on the roof. The verified all was lined up correctly. Was actually pretty painless.
Good luck!

[vettenuts]

I have never seen anything about using silicone, other than the bolts. I would call Newmar first as I was told dry installation but I have the fiberglass roof.

[ASU777]

Some progress and one remaining problem. I'll recap what worked for me in case anyone else searches this thread in the future.

What worked

Using the manuals posted in the QT thread, there are only three wires/functions that don't translate directly over between the two generations of heat pumps.

1 - CCC2 requires a new ambient temp sensor to be installed.

2 - Medium fan speed

The original Penguin II units did not have a 3 speed fan and a 2nd gen unit would have this wire capped off during the conversion to CCC. It needs a new connector crimped on and connected to the medium fan connector on the CCC2 board.

3 - Reversing valve

Based on other threads here, the old units defaulted to heat and the new units default to cool from the reversing valve's point of view.

The CCC conversion required us to splice one of the purple reversing valve wires to a common/white wire. CCC2 does this via dedicated connectors on the CCC2 board itself. T6 and T7 are a group of terminals on the CCC2 board for the neutral/common connectors.

So, one violet reversing valve wire connects to the reversing valve terminal on the CCC2 board. The other violet reversing valve wire needs a new connector and goes to T7. T6 goes to the common/white wire grouping on the run capacitor. I had to use a piggyback connector because I ran out of terminals on the common group on the capacitor although I believe this is not recommended. I will change it later.

The manual says it doesn't matter which violet wire is used for the two connections.

Problem -

At this point, I have a brand new unmodified heat pump that works as expected with the new CCC2 thermostat. Heat and cool.

My converted unit works correctly in cool mode. However, even after resetting the thermostat multiple times to read the DIP switches, heat pump (HP) mode does not show up on the thermostat.

The CCC board I removed had no heat pump dip switch at all. I don't know if this is normal and was hoping someone here knows.

My model number translates to a black Penguin II heat pump although my unit is white.

I assume it really is a heat pump and not an AC-only unit. Otherwise, it would not have reversing valve wires if it were an AC-only unit, correct?

My only thought is that the DIP switch is not quite seated correctly and may not be fully "on".

[ASU777]

The reason the HP function didn't show up was a DIP switch not fully depressed. Otherwise, everything in this thread worked for the conversion back. Well worth it just to have the new thermostat that will display the actual temps inside and outside.