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Topic: Aqua hot circulation  (Read 230 times) previous topic - next topic

Aqua hot circulation

While I have always had a hot cutlery drawer in the galley. I figured it was due to the AH being under that area. But I have also noticed that the drawer in the bedroom above the AH vent are also hella hot all the time, even though that vent hasn't activated in a few days.

SO, Do the AH circulation pumps always run when the system is on?  I thought that the pump and fan only come on when heat is called for in that zone.
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: Aqua hot circulation

Reply #1 –
There are 3 zone pumps in your heater.  The center pump runs 2 zones, bathroom and basement.  When basement thermostat calls for heat, pump 2 starts and supplies hot coolant to the bathroom fan coil and to basement fan coil.  Only the basement fan starts.

Pump 1 supplies hot coolant to the salon fan coils while pump3 supplies the bedroom fan coil.  None of those coils should be hot except when room thermostat is calling for heat.  But they will be plenty warm if they were running recently, takes a while to cool off.
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: Aqua hot circulation

Reply #2 –
Quote from: Rudy –
There are 3 zone pumps in your heater.  The center pump runs 2 zones, bathroom and basement.  When basement thermostat calls for heat, pump 2 starts and supplies hot coolant to the bathroom fan coil and to basement fan coil.  Only the basement fan starts.

Pump 1 supplies hot coolant to the salon fan coils while pump3 supplies the bedroom fan coil.  None of those coils should be hot except when room thermostat is calling for heat.  But they will be plenty warm if they were running recently, takes a while to cool off.

Thanks for the info Rudy.  Just after posting, I realized I had turned off the thermostat in the bathroom (zone 2). And when I went to check the hot drawers in the bedroom, all was at room temp. I must have the basement temp set to come on at too high a temp.
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