AGS Settings?

[Stuart W]

Originally Posted by RMD3819

My AGS is set to start at 11.5 volts. It happened one time. We were in a WM overnight and awoke to the genny running. Not sure what drained it, possibly the TVs from the prior evening.



If your temp setting is EXT then the AGS will start when the Dometic wall thermostat calls for A/C AND there is no shore power. It will run for the specified time you have set. Mine is set for four hours then will repeat the cycle if there is no shore power.



The A/C will not run on battery. If it did it would not last more than a few minutes which would deplete the batteries and start the AGS.



Don't overthink this. If either the voltage or temp thresholds are met the generator will start. The A/C will stay on, otherwise it would defeat the purpose.



This confused the heck out of me until folks like C.Martin and others chimed in.

So I’m plugged in to shore power, AC set to come on at 72 degrees. AGS is set to AC temp of 76 degrees. Would this work to turn on the Generator if shore power failed, temp would rise from set temp of 72 degrees and reach 76 degrees and start the generator? It seems like the AGS temp would have to be set higher then normal AC temp set, is this correct?

[NealC]

Stuart you are correct. The gen will come on when the AC needs to go on if shore power can’t support it and turn off when setpoint is reached plus cool down time which is typically 2 minutes.

I suggest anyone using this to exercise it so you can see it work. Set it up then cut off shore power.

[Stuart W]

Originally Posted by NealC

Stuart you are correct. The gen will come on when the AC needs to go on if shore power can’t support it and turn off when setpoint is reached plus cool down time which is typically 2 minutes.

I suggest anyone using this to exercise it so you can see it work. Set it up then cut off shore power.

Thank you Neal

[RMD3819]

Originally Posted by Stuart W

So I’m plugged in to shore power, AC set to come on at 72 degrees. AGS is set to AC temp of 76 degrees. Would this work to turn on the Generator if shore power failed, temp would rise from set temp of 72 degrees and reach 76 degrees and start the generator? It seems like the AGS temp would have to be set higher then normal AC temp set, is this correct?

That is correct.

Keep in mind this method uses the temp probe on the wall. If the sun is hitting that wall the probe will read higher than it actually is and the AGS will start even if the AC is already running on shore power. I was in Florida and needed to set the AGS to start at 90 otherwise I had many false starts. I switched to the EXT setting and have no more problems.

[Stuart W]

Originally Posted by RMD3819

That is correct.

Keep in mind this method uses the temp probe on the wall. If the sun is hitting that wall the probe will read higher than it actually is and the AGS will start even if the AC is already running on shore power. I was in Florida and needed to set the AGS to start at 90 otherwise I had many false starts. I switched to the EXT setting and have no more problems.

What does EXT stand for?

[RMD3819]

Originally Posted by Stuart W

What does EXT stand for?

External hardware to detect the temperature, in this case the Dometic AC unit.

Look at the pic in post 5. You likely have one of those. In this context the "external" is the Dometic AC system so when that system calls for AC and there is no shore power the AGS will start.

Using the specific temperatures starts the genny even if the AC is already running.

[Stuart W]

Originally Posted by RMD3819

External hardware to detect the temperature, in this case the Dometic AC unit.



Look at the pic in post 5. You likely have one of those. In this context the "external" is the Dometic AC system so when that system calls for AC and there is no shore power the AGS will start.



Using the specific temperatures starts the genny even if the AC is already running.

Got it, thank you

[PandS]

I must have misunderstood what I was told yesterday. I thought I was told that because I was wired for the EXT INPUT, that was my only option to use and that always started the generator.

So I set the AGS to 80 degrees this morning. The air conditioner was running and set to 68. All was good for a few minutes, but then the generator kicked on. Chassis and house batteries showing 12.8. AGS 2 Status: says START TEMP. When it kicked on it also said BULK CHARGE. It now says ABSORBING CHARGE. Maybe I'm having trouble with this because we're on 30 amp?


Susan

[dxg0001]

Originally Posted by PandS

I must have misunderstood what I was told yesterday. I thought I was told that because I was wired for the EXT INPUT, that was my only option to use and that always started the generator.

So I set the AGS to 80 degrees this morning. The air conditioner was running and set to 68. All was good for a few minutes, but then the generator kicked on. Chassis and house batteries showing 12.8. AGS 2 Status: says START TEMP. When it kicked on it also said BULK CHARGE. It now says ABSORBING CHARGE. Maybe I'm having trouble with this because we're on 30 amp?


Susan

Susan,

You need to set your AGS to EXT instead of a temperature. This will allow your thermostat to turn on A/C as programmed and will start the generator if there is no AC power available.

[C.Martin]

I may have posted to a different thread...

Your AGS module has only one port for REMOTE (purple color coded)

There is either a temp probe wire...in which case you would set a temperature in the AGS settings... OR a PT dongle, connected to the Dometic Control Center module...in which case you set EXT. INPUT in the AGS settings. There is only one port...and one way of doing it... I am under the impression Newmar has used the PT-2 dongle in all of their recent installations.

The only place you need to set a temperature is on the zone display of your wall thermostat. The AGS is controlled by the wall thermostat. Each zone has a half-globe sensor mounted somewhere in the coach. We have two...one on either side of the bedroom pocket door.

Each time power is cycled on the MS2812...the charger reawakens and goes into the programmed charging mode. You may have a pre-programmed schedule running..like Flooded, AGM1, AGM2, etc...or Custom.

The status is showing the charger going bulk...until it hits absorb voltage, where it will hold a constant voltage for the time you choose based on the aH capacity of your bank. From there...it depends on the finishing setting, Float, Silent, Multi... I have another charge source (solar) so I have multi. The MS2812 quits charging after the Absorb Time setting...and switches off, until rebulk voltage is reached. Our solar keeps on floating until the sun goes down.

http://www.magnum-dimensions.com/sit...ME-PT2_Web.pdf

ME-PT2 instructions... We have the Networked AGS...and the Dometic Control Center connection...

[Stuart W]

Originally Posted by C.Martin

I may have posted to a different thread...

Your AGS module has only one port for REMOTE (purple color coded)

There is either a temp probe wire...in which case you would set a temperature in the AGS settings... OR a PT dongle, connected to the Dometic Control Center module...in which case you set EXT. INPUT in the AGS settings. There is only one port...and one way of doing it... I am under the impression Newmar has used the PT-2 dongle in all of their recent installations.

The only place you need to set a temperature is on the zone display of your wall thermostat. The AGS is controlled by the wall thermostat. Each zone has a half-globe sensor mounted somewhere in the coach. We have two...one on either side of the bedroom pocket door.

Each time power is cycled on the MS2812...the charger reawakens and goes into the programmed charging mode. You may have a pre-programmed schedule running..like Flooded, AGM1, AGM2, etc...or Custom.

The status is showing the charger going bulk...until it hits absorb voltage, where it will hold a constant voltage for the time you choose based on the aH capacity of your bank. From there...it depends on the finishing setting, Float, Silent, Multi... I have another charge source (solar) so I have multi. The MS2812 quits charging after the Absorb Time setting...and switches off, until rebulk voltage is reached. Our solar keeps on floating until the sun goes down.

http://www.magnum-dimensions.com/sit...ME-PT2_Web.pdf

ME-PT2 instructions... We have the Networked AGS...and the Dometic Control Center connection...

This is mine

[RMD3819]

Originally Posted by Stuart W

This is mine

The little square box with the green sticker is the dongle C.Martin is referring to.

This dongle is the EXT INPUT you are connecting with in the AGS settings.

Susan-your AGS started because you are using a numbered temperature setting and not the EXT INPUT setting. The wall sensor read 80* even though the AC was running.

[Stuart W]

Originally Posted by RMD3819

The little square box with the green sticker is the dongle C.Martin is referring to.



This dongle is the EXT INPUT you are connecting with in the AGS settings.



Susan-your AGS started because you are using a numbered temperature setting and not the EXT INPUT setting. The wall sensor read 80* even though the AC was running.

Thank you

[C.Martin]

Without a probe...I don’t know what it is “reading”. If you set a temperature instead of ext. input...you can probably go to TECH....TEMPERATURES....AGS TEMPERATURE.

It should show you what it thinks the temperature is...but with the PT2 connected, I have no idea what it thinks it is reading. It is picking up intergalactic static or something...

When I go to TECH...TEMPERATURES...AGS TEMPERATURE...it says EXT.