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L4080B1295 hi-limit Aquastat This is a temperature control on a hot water heater.

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6ya6ya
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Posted on Jan 02, 2017

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refritech08
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SOURCE: I want to adjust the

To enter the adjustment mode, press the UP, DOWN, and I buttons simultaneously for three seconds. Press the I button until the feature requiring adjustment is displayed:
• HL —High Limit.
• LL— Low Limit.
• Ldf —Low Limit differential.
Then press the UP and/or DOWN buttons to move the set point to
the desired value. After 60 seconds without any button inputs, the
control will automatically return to the READ mode.

(copied from honeywell's instructions)

to clarify the differential is cut in minus the cut out.
Hope i can be some help to you.

Posted on Apr 21, 2008

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walterkunesk
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SOURCE: Im trying to install a

It can be installed on the supply line but if the system is zoned DO NOT put it on a zone line but on the main header. thank you.

Posted on Mar 16, 2011

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1 Answer

Why will my boiler not fire up for heating but works fine on hot water


you have a triple aquastat that maintains a temperature level needed to provide hot water. but you are not getting the thermostat to operate the central heating. The thermostat is a switch that operates by temperature. if you have tried raising the thermostat and the system did nor kick in try jumping the thermostat terminals in the aquastat . if that works then the problem is either in the thermostat or the wiring to the thermostat. also with a electrical tester." while the thermostat is jumped" test the c1 and c2 terminals to see if power is going to the circulator. If not then you need a new aquastat. if you have power and the pump is not moving water replace it.

Oct 11, 2014 | Water Heaters

1 Answer

Want to raise the water temp


Stand alone water heaters have temperature controls in different locations.

11_23_2012_12_50_47_pm.jpg
Most residential electric water heaters operate on 240 volts. Please, shut off power first whenever you need open or remove panels for adjustments or servicing.

"Traditional" electric water heaters have them behind removable panels - like the top and bottom gray panel on the water heaters on the right side of the photo. Both panels have adjustable controls behind them and both should be adjusted to the same setting.

Some newer electric water heaters use electronic controls. These may be accessible without removing panels and even have digital displays. Others have controls that are located on the top of the heater - behind a panel. Electronically controlled water heaters may or may not need to be powered on when making adjustments. Check your manual if in doubt.

Gas (propane & natural gas) type water heaters have the temperature control on the gas valve. There are often two controls on the valve, one for the pilot (off, light and on positions) and a second for temperature adjustment.

A tankless water heater built into your home's furnace is controlled by an "aquastat". An aquastat is a fancy term for a thermostat to control water temperature. A typical aquastat is mounted directly on or very near the furnace and looks like this:

11_23_2012_1_08_47_pm.jpg
Inside, are several temperature settings. Here's a photo of the interior of the Honeywell aquastat:


11_23_2012_1_12_16_pm.jpg
The Hi dial should never be set to a value lower than the Lo dial. "Safe" settings are Hi = 180, Lo = 160 and Diferential (above "Lo") = 10. You'll need to tweak these up a bit to make water hotter. You should read more about settings for these aquastats here. Skip down to the section titled "What Settings To Use on a Heating Boiler Aquastat Combination Control"

I hope this helps & good luck!

Nov 22, 2012 | General Electric GE SmartWater Household...

1 Answer

Does the boiler thermostat control the heat of the radiators as well as the hot water temperature? Does the thermostat control the water temperature and the pump - as our pump seems to be on all the...


There should be a control called an aquastat that regulates the temperature of the boiler. The thermostat will turn on the circulator to start the flow of water through the radiators. If the water coming back from the radiators is very cold, a control will shut off the circulator until the boiler can come up to a predetermined temperature then start the flow of water again. If you have a tankless coil for domestic hot water, you now have a triple aquastat that maintains the temperature for domestic as well as the boiler temp. So yes the boiler thermostat (aquastat) does control the heat of the radiators and domestic hot water. No the pump is regulated by your house thermostat. You should take an amp draw on the boiler and componants to find out what is drawing more electricity than it should and popping your fuse.

Feb 19, 2011 | Heating & Cooling

1 Answer

Boiler overheating


the problem there a relay stuck or thermostat bring on the pump & you can lower your high limit aquastat!! also the flow valves can bypass hot hot water risers time to put in a seperate water heater domestic coil are not energy efficient !!!! aquastat high limit set @ 180f deg low limit set @ 140f deg!!!
good luck!!! tim

Oct 08, 2008 | Water Heaters

1 Answer

I want to adjust the hi and low water temp limits for my oil hot water boiler; I have a Honeywell L7224 aquastat but I cannot find any temperature indicators; how can I do this?


To enter the adjustment mode, press the UP, DOWN, and I buttons simultaneously for three seconds. Press the I button until the feature requiring adjustment is displayed:
• HL —High Limit.
• LL— Low Limit.
• Ldf —Low Limit differential.
Then press the UP and/or DOWN buttons to move the set point to
the desired value. After 60 seconds without any button inputs, the
control will automatically return to the READ mode.

(copied from honeywell's instructions)

to clarify the differential is cut in minus the cut out.
Hope i can be some help to you.

Apr 21, 2008 | Heating & Cooling

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