04-10-2023, 09:27 AM
A fellow guru is having a bit of an issue on a trip because apparently the mechanisms for allowing the aux compressor to relieve head pressure after cycling have been removed in the new to him coach. Primary symptom is the compressor just hums when trying restart. He has already burned up one compressor on this trip. The owner can release the head pressure on the compressor, and it starts and performs as intended.
To the purists, the following recommendation is NOT the HWH designed system to relieve pressure from the dessicant bowl. Those part numbers can be found in other posts.
I post this info here to get the young man back to flushing potties at night as quickly as possible. By posting here it may help someone else in the future.
First, a compressor unloader is required. https://www.amazon.com/Compressor-Pressu...B0B14TVP77 I have used this one in three applications with no issues. You can pay more for an Ingersoll Rand if you like.
Second, here is the schematic for piping it in.
This will replace the SquareD well pump switch for the compressor.
Pay close attention to the order of the tee and the check valve in the line.
To the purists, the following recommendation is NOT the HWH designed system to relieve pressure from the dessicant bowl. Those part numbers can be found in other posts.
I post this info here to get the young man back to flushing potties at night as quickly as possible. By posting here it may help someone else in the future.
First, a compressor unloader is required. https://www.amazon.com/Compressor-Pressu...B0B14TVP77 I have used this one in three applications with no issues. You can pay more for an Ingersoll Rand if you like.
Second, here is the schematic for piping it in.
This will replace the SquareD well pump switch for the compressor.
Pay close attention to the order of the tee and the check valve in the line.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)