Skip to main content ↑ ↓
Topic: Oasis Hydronic Heat (Read 536 times) previous topic - next topic

Oasis Hydronic Heat

I have an 08' Nimbus with the Oasis unit. My question is this. Does the thermostat that controls the A/Cs - Heat pumps also control the Oasis. I have no separate thermostat for the Oasis heat that I'm aware of. Tried it for the first time today. Put the thermostat on heat. Had the Oasis on AC. I could not run the burner due to being in indoor storage. The heat pumps ran but there was never any heat or air from the floor vents. I'm wondering if the Oasis unit has a heat switch and will not blow until the fluid is hot enough.
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee

Re: Oasis Hydronic Heat

Reply #1 –
I don't believe the fans and pumps need heat to operated. If you are plugged in
why not put the Oasis on electric and then check it.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Oasis Hydronic Heat

Reply #2 –
Quote from: oldguy –
I don't believe the fans and pumps need heat to operated. If you are plugged in
why not put the Oasis on electric and then check it.
That's what I did. I was plugged in and turned on the electric heating elements. There was no air coming from the floor vents. Just out of the overhead vents from the heat pumps/ ACs on the roof.
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee

Re: Oasis Hydronic Heat

Reply #3 –
My main thermostat runs the main room and the bedroom and I have a separate
thermostat for the bathroom area. Your coach is a lot newer than mine so things
may be different. The Oasis is a lot like the Aqua-hot so I would check the cube
relays and see it they are plugged in properly. Rudy will probably check in as he
is the guru on these boilers.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Oasis Hydronic Heat

Reply #4 –
On the older Foretravels with AH. The thermostat control 2 zones. it has four functions, Fan only, AC, Furnace(AH) and heat strip. If I have one zone set to Furnace, The other zone won't allow the AC to come on. I suppose this is to prevent to many amps being drawn.

As your unit is pushing heat out with the heat pump. Perhaps it is a command conflict because of trying to run two differing functions.
Jerry & Nona and Kimeru the cat that thinks she's a dog
1998 36' WTFE U320  #5314 Motorcade #17711
USAF 1975-1995
2019 Subaru Crosstrek 'toad'
2003 Subaru Legacy touring car
jerry Fincher | Flickr

Re: Oasis Hydronic Heat

Reply #5 –
The Oasis heater has switches for Diesel burner and Electric element operation.  No floor heat till one or both heat sources are ON.  If outside is below 50, maybe 45 degrees, turn on both, diesel and electric.

Do you have hot water?  If so, the Oasis is on and working.

Now that the heater is warmed up, no interior floor heat till the interior thermostats are set to Furnace.  Having air from the ceiling ducts says the thermostats are NOT set for furnance, Oasis heat.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Oasis Hydronic Heat

Reply #6 –
777, I have sent you a PM
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Oasis Hydronic Heat

Reply #7 –
Quote from: Rudy –
The Oasis heater has switches for Diesel burner and Electric element operation.  No floor heat till one or both heat sources are ON.  If outside is below 50, maybe 45 degrees, turn on both, diesel and electric.

Do you have hot water?  If so, the Oasis is on and working.

Now that the heater is warmed up, no interior floor heat till the interior thermostats are set to Furnace.  Having air from the ceiling ducts says the thermostats are NOT set for furnance, Oasis heat.

Thanks. I finally figured out the thermostat has three mode settings. Cool, Heat and Gas. The Gas setting was for the Oasis since I have no LP. Also the fans have aqua stats. Hence the fans don't come on until fluid is hot. With that finally understood. The system works great. Thanks for all the help. 
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee