M380 Hurricane Heater

[cmillsap]

(02-20-2013 12:15)pgchin Wrote:  

(02-19-2013 19:05)cmillsap Wrote:  I’m still working out some of the little items that need attention on my coach. I bought this M380 last April so I have owned it for only a few months and I’m still learning about it. I think I’m on to the last item that needs to be brought back to proper operation.

One of the items that I reserved to do last (because I’m unfamiliar with it) is getting the Hurricane Heating system to provide heat throughout all the registers in the coach. Presently only the two front registers blow warm air. That would be the one under the right side of the dash and the one under the L desk behind the passenger’s seat. These are in zone 1 along with another register located behind the dinette table. So 2 registers blow warm in zone one and 1 register blows cold.

The only register I’ve found in zone 2 is under the bed and it blows cold and both small registers in the bath blow cold.

All the controls are set as described below:

Both upper and lower switches are on at the unit in the bay

Hydronic Heat switch is on at dash. Hurricane heater switch in door under kitchen cabinet is on. Main thermostat (Aquahot) set to furnace on both zones 1 & 2 and set 10*s above room ambient temp. Bath thermostat is on and set all the way up.

This Hurricane only has 300 hours of operation on it. Nice clean exhaust from the diesel burner. Hurricane is cycling properly as determined on the readout but only the 2 front registers blow warm, all others blow cold.

All the heater hoses feel nice & warm exiting from the unit as far as I could trace them towards the registers.

I'm kinda at a loss at this point. I think I have all the controls set properly but maybe not? It just appears that the heated coolant (ha! an oxy moron) is not circulating through all the registers. I do not see any valves that could be turned off and preventing full circulation in all three zones. I guess it's possible that the hoses are kinked somewhere or the registers are plugged?

Anyone have any ideas on what the problem may be? Any suggestions would be appreciated..........

Chuck,
If I understand you correctly, when you set both thermostats to call for heat, all the registers fans that move air go on, but the small radiators in zone1 blow hot and zone 2 blow cold? "Bo don't know diddly" about Hurricane so this is just a SWAG but I agree with David, a stuck check valve or the basement thermostat is somehow off, in loop2, and somehow shutting loop 2 down?????? If you had a hurricane shop or install manual to post, I could look at it and give ya better SWAG.......sorry....

Thank you, Pete,
Thats correct, one of the two register circuits is not returning the heated fluid. Both outbound lines from the unit are hot but only one return is warm, the other is stone cold. Actually, there is only one circuit out and returns to & from the unit to all the registers, The way we get two seperate circuits is that the lines tee off to two circuits outside the Huricane unit. One supplies the front and the other supplies the rear. The return line is teed in the same manner, one of the return lines to the tee is warm the other is cold.

The 2 basement heaters on a M380 are electric element heaters. The problem is finding the blockage if it is a check valve or a kink. I may just have to take it to a Hurricane service center and hope that they can find it.