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

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2 Suggested Answers

refritech08
  • 149 Answers

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

walterkunesk
  • 683 Answers

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

Aquastat pops reset when reaching temp.


Aquastat cycling controls do not have a reset button. What you are looking at is a manual reset limit switch. That is a safety control set at the MAXIMUM allowable temperature for the boiler to attain. More than likely the actual cycling control is not cycling at the correct temperature allowing the overtemp condition. The cycling control will be very close in external appearance to the limit switch but it will not have the red reset button and it is wired in series with the limit control and will turn the boiler off and on automatically based on its setpoint.

Mar 12, 2015 | Air Conditioners

1 Answer

I have a Weil mcLain Gold gas furnace and the Amtrol WH-7L hot water maker. I heat alot with an indoor woodstove and if the furnace is not being used I cannot get any hot water. However, when the furnace...


You should download & review the manual for Amtrol Boilermate products here.

Page 12 of the manual begins examples of wiring between the Boilermate and aquastat (also gas valve and multi-zone relay), that is usually mounted on the boiler. In order to use it correctly, you'll need to determine which aquastat (or other device) your furnace has. You should be able to locate this info on the inside of the aquastat cover. The Honeywell Triple Acting aquastat is very common and looks like this:

11_29_2012_7_17_38_pm.jpg
The cover is held by a single screw on the top, bottom or front (depending on the model you have). The inside should have wiring information along with the model number. Compare the model number with the wiring diagram for it in the Boilermate manual.

Make sure power is OFF before continuing.

Check that all wires are terminated and undamaged. Make sure terminal screws are not loose. Tighten any found to be loose.

The orange wires are connected to a switch that is normally OPEN but CLOSES to start the boiler when the hot water has cooled. It is also used to operate a "power vent" for a minute or two both before ignition and after flame out for safe pre and post purging of the combustion chamber of furnaces that lack a chimney.

Blue wires are connected to a switch that is also normally OPEN but CLOSES to start the boiler when the hot water has cooled. When the switch connected to these wires is CLOSED, ignition happens instantly. There is no delay for purge so when these wires are used to start a furnace, it should be one with a chimney - not a power vent.

For additional help with your particular installation, you will need to provide information concerning the wiring diagram in the manual that applies. Otherwise, there are simply too many variations to walk through.

I suspect that the switch(es) that are connected to the orange (or blue) wires - or the device (aquastat or multi-zone relay box) is not operating as expected to start the furnace.

The troubleshooting section of the manual that seems to apply best is the section: Boiler will not operate when calling for hot water on page 27 (if you want to try some of their suggestions while waiting for additional replies).

I hope this helps..

Nov 29, 2012 | Air Conditioners

1 Answer

Why does the reset button on the aquastat keep tripping every time boiler finished a cicle


Hi, this is because the boiler aquastat is faulty! Change it out as the contacts are worn out causing it to trip the stat. I have seen this so many times. Please let me know.
Shastalaker7
A/C & Heating Contractor

Apr 09, 2012 | Air Conditioners

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 | Air Conditioners

1 Answer

Water heater not heating water , single element 110v replaced still no hot water


How To Test High Temperature Cutoff Switch Located at the Upper Heating Element Before testing the electic water heater elements we should check out the high temperature cutoff switch since a problem there will simply turn off power to both heating elements.
On an electric water heater the upper heating element may have two, three, or four electrical terminals, and above the upper thermostat is a high temperature cutoff switch with four terminals. You should be able to identify these parts by looking at the water heater's wiring diagram found on the tank or inside the panel cover.
The electric water heater high-temperature cutoff swtich will turn off the entire water heater if temperatures are too high. If this cutoff is not working the water heater will simply not heat at all. You can use this switch to test to confirm that the incoming electrical power circuit is indeed bringing power to the water heater.
Turn off electrical power to the heater at the electrical panel: WARNING: possible fatal electrical shock
Set the multitester or VOM to its 250 VAC scale, and attach the tester probes or alligator clips to the two uppermost terminals on the control (L1 and L3 on the top left and top right in our photo below). These are normally the incoming electrical wires from the power circuit to the heater. "L" refers to "Line voltage" on most controls.
Test for line voltage: Now you can turn on electrical power to the heater. Your VOM should show voltage close to the voltage on the water heater's identification tag: typically this will be 208V or 240V for a 240V water heater, or it might be just 115V or 120V for a 120V water heater. If you do not see voltage close to the rated voltage you need to call an electrician to diagnose and repair the problem.
Turn off Electrical Power to the Water Heater again. Don't skip this step or you may be killed or you may ruin your test equipment.
Test the High Temperature Cutoff Switch itself: set the VOM to its Ohm or resistance scale using the most sensitive setting (R x 1). Touch one probe to the upper left terminal on the control (L1 in our photo at left). Touch the other probe to the lower left hand terminal on the control (T2 in our photo at left).
The ohm meter needle should move (or your digital multimeter DMM should show some number other than infinity). If no continuity and infinite resistance is what you read, try pressing the reset button on this control (the red "RESET" button in our photo at left).
If you cannot reset the control then this device is not working and it needs to be replaced.


.

Jan 03, 2011 | Air Conditioners

1 Answer

If i am away for any length of time, do i put the temp on vacation? does the water still get warm?


Since you didn't provide the brand & model of the thermostat, only generic help can be provided.

Most furnaces that run on oil or gas, make hot water all the time, 24 / 7 - winter, summer and everything between so to speak. They are controlled by an aquastat that may be set for any value between 140 - 180 degrees F. This is called "hot start" - simply because when the thermostat is set to a temperature higher than the room (turning heat ON), the water is already hot in the furnace, and is circulated immediately. If it was a "cold start", you'd have to wait for the water in the furnace to heat up from room temperature. This would substantially increase the amount of time it would take to heat the room.

Generally, the "vacation mode" simply halts the program from running. If your thermostat changes temperatures several times during the day / night, it will simply hold the lowest temperature - or a predetermined temperature built in - or chosen by you. You'll need to consult your manual to determine just how your thermostat handles the vacation mode setting. Post again if you can't find the manual - but tell us what brand and model it is.

I hop ethis helps - good luck!

Many heating thermostats don't allow for setting a temperature below 45 degrees F so freeze ups shouldn't be a problem.

Sep 30, 2010 | Air Conditioners

1 Answer

HI IAM A ELECTRICIAN WORKING ON A LAAR HOT WATER BOILER WITH A STORAGE TANK THE TEMP IS SET TO 160 THE HIGH TEMP LIMIT SWITCH IS SET 200 AND THE AQUASTAT ON THE STORAGE TANK IS SET ON 120 THE BOILER COMES...


I would suspect a water circulation problem, most likely air in the system, if the water can't flow it will overheat.

If the problem persists after bleeding check to make sure the pump is running

May 06, 2010 | Air Conditioners

1 Answer

SYMPTOMS: BOILER SEEMS TO IGNITE AND FIRE UP EVEN WITH BOTH THE HEATING AND HOT WATER OFF. DO YOU THINK IT IS A BYPASS VALVE ADJUSTMENT PROBLEM? I HAVE A DU145, HOW DO I ADJUST IT? HARISH LATHIA


Some boilers must maintain temperature for proper operation. Not sure what a DU145 is?! Give us a brand name and a model number and any additional information you can such as thermostat setting, Aquastat setting (if you can) etc...

Jun 08, 2008 | Honeywell Air Conditioners

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 | Air Conditioners

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