Omnilogic temperature measurement

[Ojman]

Hi guys,

Quick question for you:

When operating my Hayward heater in Bypass mode and using my Omnilogic controller, which temperature reading is the heater using to determine if the pool is at temp (and to turn the heater on/off)? Is the controller just a thermostat but the heater determines the temp and turns on/off accordingly?

It seems that the temperature reading between my Omni sensor (installed just after the filter pump) and my heater sensor is 1-2 degrees different (heater shows a touch higher) and it would appear that the Omnilogic controller thinks it is still heating, while the heater knows it is at temp and then shuts down.

Thanks!
Andrew

 

[ajw22]

A man with two watches never knows what time it is.

If two thermostats agree it is only coincidence.

When a heater is under automation control it’s thermostat should not be used and should be set to 104.

 

[Ojman]

Ok, so if my heater thermostat is set to match (approx) do you think that could be the gap here? (And my understanding of what is happening is correct?

The Omni controller not currently aligning with what the equipment is doing is making my ocd itch

 

[ajw22]

Ok, so if my heater thermostat is set to match (approx) do you think that could be the gap here? (And my understanding of what is happening is correct?

The Omni controller not currently aligning with what the equipment is doing is making my ocd itch

I have no idea what you are asking.

You should not be using the heater thermostat.

 

[Ojman]

haha ok,

Let me re-phrase.

My Omni controller says that the pool is not at temperature and is calling for heat.

The heater is not on.


Why would this be?

 

[ajw22]

What is the heater thermostat set to?

 

[Ojman]

I think the same temp as the omni controller (85)

 

[ajw22]

I think the same temp as the omni controller (85)

Set the heater temperature to 104.

 

[Ojman]

Ok, so maybe stupid question, but I need to take the heater out of bypass mode, crank the heat up (it only goes to 90 for pool and 104 for Spa) and then put it back into bypass?

 

[ajw22]

Ok, so maybe stupid question, but I need to take the heater out of bypass mode, crank the heat up (it only goes to 90 for pool and 104 for Spa) and then put it back into bypass?

Correct.

 

[ajw22]

See pages 13-15 in…

https://hayward.com/media/akeneo_connector/asset_files/U/H/UHS16b_UHS_TSG_febc.pdf