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Penguin II "Load Shed" wiring question

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Richard Davis:
I am in the process of replacing one of the original Dometic Penguin Heat Pumps on my 2006 Monterey.  As I disconnected the wiring from the old unit, I found that the "Load Shed" (yellow wires) from the Penguin control board are connected to a 120 volt AC powered relay in the junction box.  It seems to only function to make or break continuity on the two yellow "Load Shed" wires.  I was confused by this.  My coach does not have any type of Load Shed system.  What is the purpose of this relay and does the purpose carry over to the new Penguin II that I will be installing.  I am hesitant to just hook up the two yellow wires to that relay without knowing their purpose.  Can someone out there that knows these systems better than I shed some light on things.  Thanks.

Richard   

David T. Richelderfer:
Our coach has three roof AC/Heat Pumps.  I can turn them on in rapid succession (as fast as I can walk between the two thermostats) and they will start up sequentially a few minutes apart.  Isn't that delay with sequential startup due to a "load sharing" function?

Bill Lampkin:
Had to cut the yellow wire on our front AC to get it to run. Interested to see where this thread goes. Nice to know I'm not alone with this issue

Steve Huber Co-Admin:
Richard,
It's not clear from your post (at least to me) of the old AC and new AC have the same control board hookups or not. If not, suggest you call Dometic. They are very good about assisting in new hookups.
Steve

Richard Davis:
Steve
The original is the Penguin heat pump that was installed at the factory in Oregon in 2005.  It is controlled by a single zone 5 button thermostat.  I am replacing it with the newer model Penguin II with the CCC2 control board pre-installed.  Of course, I have to have the new style 10 button CCC2 thermostat.  The wiring color codes for both units are identical.  I have now installed the Penguin II and the CCC2 thermostat.  The unit is functioning just as I expected it to.  I have done some testing on the relay that Beaver originally installed and attached the "Load Shed" wires to.  When 120 volt AC power is removed from the unit, the relay connects the 2 "Load Shed" wires together.  When power is restored, the relay disconnects the 2 "Load Shed" wires.  This relay may have had a purpose in higher end Beaver coaches that had a load shedding system installed.  It seems to serve no purpose in my Monterey.  The only thing I can speculate is that the Beaver factory used the same junction box regardless of whether the coach had a load shedding system or not.  I am going to contact Dometic to determine if I can simply tape off the "Load Shed" wires (the yellow ones) and not connect them to anything.

Bill
The reason you had to cut one of the yellow wires to get your unit to work was because they were somehow, somewhere connected together.  If the yellow wires are electrically connected, the unit will not run because it is in "Load Shed" mode.

I have learned a little bit, but am certainly still confused as to why the factory installed it the way they did originally.  I will pass on any additional information I glean.

Richard 

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