This group of controls includes all Honeywell’s most popular legacy (older and proven) controls. Most have been around for plus years and continue to be. Find the information and literature you need on specific products quickly and easily from the most up-to-date documentation for Honeywell Security products. Does anyone have a PDF on the operation or “logic” of this control? I know it has a built in load limit if the water temp is too high and low.

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Discussion in ‘ Commercial ‘ started by WarrenJun 7, Log in or Sign up. We have a lot of fun, but make no mistake, we are pros.

Honeywell EHW Temp Sensors Resistor Kit W Test plug Connectors | eBay

Hvacproforums is self supporting Do-it-yourselfers and Homeowners are encouraged to seek information elsewhere. Those involved in the HVAC industry are urged to register. New to the club! The name is Warren I’m a nub to to this forum.


This is the only service related forum I’m on. Been on some Mountain Biking, and 4Runner fourms for awhile. Anyway I do service work around the So Cal LA and Honeywelll County area. Mostly in food distribution and production facilities, and Hospital’s.

Friday afternoon I got a service call on a Trane Chiller, wont start. Here is the Model After some time w700 on it I have found that the Leaving temp sensor is good After reseting the unit the start mode light comes on for a time then it gose straight to LTC lock out.

After some research it appears that this can also be caused by the auxiliary relay board 1U Or by a bad ground. I don’t have and have not come up with the trane test tool TOL To properly test the controler. Any help honeyweell be appreciated.

Oh yes this is the Honeywell W controler. WarrenJun 7, Is hhoneywell leaving fluid setpoint correct? Texas-TechJun 7, Damn that’s awful high for chill water.

That was my thought. This is the first time I’ve worked on this unit and the in house teach says that is the way they honeywelo it. They even had the controler marked at 60F and the Leaving water thermometer marked at 55F.


Low temp safety circuit is open. The Peoples Republic of New Jersey.

TRANE/honeywell W chiller control | Hvac Pro Forums

BustawrenchJun 7, Thank you all for listening! I now have a better plan of attack for tomorrow morning. Some times I just need to talk about the problem to turn on the light.

If the 1uk29 contact is open then its likely honeywdll relay board not the controler. Or maybe even the 1f10 fues for the 1u13 relay board.

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