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#HOW TO WIRE AN OIL BURNER AQUASTAT LOW WATER CAD MANUAL#

So do I have to replace the aquastat? Reply: Steps in Troubleshooting the Honeywell L8148 Aquastat & Similar Now the aquastat has stopped working after the electric short. I was changing the Taco circulator pump and I made a mistake while power is on and I caused a short with line going to taco pump.

#HOW TO WIRE AN OIL BURNER AQUASTAT LOW WATER CAD MANUAL#

Often an alternative case is available to convert vertical to horizontal mount for these controllers.Ī link to the Installation and Operating guide and cross reference manual from Honeywell is give in the article above.ĭiagnostics for the Honeywell L8148 series Aquastat Relays Question: I shorted some wires and now the aquastat doesn't work - do I need a new one?

Honeywell L8148J is a vertical or horizontal-mount aquastat switching a millivolt circuit (such as found on gas control valves).

This unit is designed for a low-voltage burner circuit. The limit control can switch both burner and circulator.

Honeywell L8148E-1299 is a vertical-mount aquastat with an 15deg DIFF control and a 50VAC transformer.

A remote low limit controller can be added. Its high limit opens the burner circuit only.

Honeywell L8148E-1265 is a vertical-mount aquastat with a 15deg DIFF control using a 24VAC transformer.

The controller switches both burner and circulators.

Honeywell L8148A-1017 is a horizontal-mount aquastat with a 8deg DIFF control.

Honeywell L8148A aquastat switches line voltage to the burner, mounts horizontally, contains a HI limit only, uses a 24VAC thermostat.

The Honeywell L8148 series aquastats are used on hydronic heating equipment and use an immersion-well sensor to inform the aquastat of the boiler temperature. The data tag on the aquastat interior (red arrow) can help identify which version of the L8148 Aquastat is installed. The photo shows a Honeywell L8148E installed on a gas fired heating boiler, courtesy of reader Paul, July 2018. Both single function (high limit or low limit are separate controls) and multi-function aquastats are provided.

Honeywell offers aquastat controllers for both oil and gas fired heating equipment such as hydronic (hot water) heating boilers and water heaters. Gary, I have not found an L4148 series such as in your question. Thanks Reply: Honeywell L8148-series aquastat model differences Would like to know what the difference is between the L4148e 1257, L4148E 1265 and the L4148e 1299 model aqua stats. Question: L4148e 1257, L4148E 1265 & L4148e 1299 aquastat model differences -> L8148 Aquastat models & manual

To add additional relays you'll need to add an additional transformer to power them in groups of 4. Includes models that can operate 2 zone valves or 4 relays such as the Honeywell R8320C.Includes models supporting addition of a remote low limit temperature control.Uses a differential that is not adjustable.Provides a high-limit control that is set using a dial with settings in the range of 180F to 240F (82C to 116C) with optional models available with a scale range of 140F to 240F (60C to 116C).The L8148 Aquastat® Relays are immersion type hydronic controllers that combine high limit protection with switching relay control of burner and circulator motors. Honeywell L8148 Series AquastatsĮxcerpting from Honeywell's manual for this controller,

We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. We explain the location and use of the heating boiler reset button found on aquastats. We define the HI LO and DIFF controls on heating boiler aquastats and explains what they do and how they work. This article series explains how aquastats work and what the different aquastat controls are, what they do, and how they are set. Guide to the Honeywell L8148-series aquastat controls on heating equipment:įeatures & applications for the L8148 Aquastat and links to product features & wiring or installation instructions for this and other Honeywell aquastats in current use for oil or gas fired heating equipment as well as some electric boiler equipment. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.