Technical / Extra Edition

Contractor Reduces Setup Time With Electronic Controller

October 10, 2011
/ Print / Reprints /
/ Text Size+

Setting up a refrigeration condensing unit for a walk-in cooler can present a challenge in foodservice applications.

Technicians can spend 25 minutes or more to properly adjust a mechanical low pressure control on a refrigeration condensing unit. These coarse adjustments tend to drift over time, requiring return service calls.

Mechanical low pressure controls (Figure 1) require:

• Hooking up a gauge set;

• Reading system pressure;

• Adjusting the mechanical pressure control with a wrench or screwdriver;

• Allowing system pressure to settle;

• Reading the system pressure again;

• Making any needed final adjustment(s) to the mechanical pressure control; and

• Removing the gauge set.

Contractors asked for a control they could set up more quickly that would not drift.


The Electronic Unit Controller (Figure 2) from Emerson Climate Technologies is now standard on many refrigeration condensing units. The controller reduces setup time and is designed to remain accurate over the life of the product. In addition, contractors can utilize the built-in diagnostics to more quickly troubleshoot any field issues.

“The Electronic Unit Controller from Emerson was easy to install and set. Our technician was very impressed by the accuracy of the pressure readings compared to his service gauges,” said Dan Whitten, Rosetown Central Refrigeration & Air Conditioning Ltd., Brampton, Ontario.

Emerson noted that overall benefits of the controller are:

• Setup time reduced from 25 minutes to one minute.

• Setpoint accuracy of 1.5 percent over the life of the product.

• Multi-refrigerant approval in one condensing unit.

• Built-in troubleshooting diagnostics.

• Added system safeguards.

• No cap tubes to break.

For more information on the Electronic Unit Controller, visit

Publication date: 10/10/2011

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.



Image Galleries

2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.


NEWSMakers: Jason Vogelbaugh

Jason Vogelbaugh of Alpha Controls drops in to the NEWSMakers podcast to discuss his role with the company, the InsideIQ Building Automation Alliance, and current energy-efficiency projects being worked on. Posted on Sept. 26.

More Podcasts


NEWS 09-29-14 cover

2014 September 29

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe


DOE has denied AHRI’s petition for reconsideration of walk-in standards. Is it getting harder to reach consensus on efficiency standards?
View Results Poll Archive


2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con