VS pump setting with gas heater

abfab

Well-known member
Nov 12, 2012
167
Ontario, Canada
I have a natural gas heater. When the pump runs on low there isn't enough pressure for the heater to work (I get low flow message). In the past I manually turned the pump to a higher rpm, turned on the heater and waited. We like the pool to be 88-90 so this can take a while especially early/late in season. We don't have a solar cover but am thinking of getting one this year.

This year I am thinking of having the heater run more consistently so we always have warm water. I was thinking of scheduling the pump run on high overnight and low during the day as our hydro rates are higher during day/afternoon. Will these low flow messages damage the heater over time? I know some people think the pump only needs to run overnight but I prefer to have my pool constantly circulating. What is the best approach? Our heater is only a year old.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,419
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I assume you have no form of automation. If you do, I suspect you can program the pump to increase rpm when heat is called for. And you can schedule when you want that to happen.

The heater is not harmed by the pressure switch in side of it preventing it from running.
How are you getting a low flow message?
 

abfab

Well-known member
Nov 12, 2012
167
Ontario, Canada
I assume you have no form of automation. If you do, I suspect you can program the pump to increase rpm when heat is called for. And you can schedule when you want that to happen.

The heater is not harmed by the pressure switch in side of it preventing it from running.
How are you getting a low flow message?
No automation. It displays a LO message.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,419
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
No issues then. It will run when you schedule the pump to run at a flow rate high enough to satisfy the pressure switch.
 
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