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Remember Capacity & Consumption When HVAC/R and BAS trade news | Volume IV / 2018 kele.com | [email protected] | 888.826.9047 REMEMBER CAPACITY & CONSUMPTION WHEN SELECTING AN ELECTRONIC TO PNEUMATIC TRANSDUCER Also featured in this volume: • Kele Introduces Product Matching Solution • Is Your BAS Ready for the Cold? • Powering Multiple Devices from a Common Transformer Kele Insights | Volume IV / 2018 kele.com | 877.826.9047 | [email protected] Volume IV: Table of Contents pg 02 // Kele Introduces Product Matching Solution pg 03 // Is Your BAS Ready for the Cold? pg 05 // Remember Capacity & Consumption When Selecting an Electronic to Pneumatic Transducer pg 07 // Back to Basics: Don’t Let a Mismatched Signal Delay Profitability! pg 08 // Powering Multiple Devices from a Common Transformer pg 11 // The Best Choice for UL924 RIB® Relays pg 14 // Honoring Our Vets: A Different Type of Kele Service P74 Series – Differential Pressure Switch The Johnson Controls Model P74 Differential Pressure Switch measures the difference in pressure exerted upon its two sensing elements in the building automation application. It operates an SPDT switch at the differential pressure set point. With these differential pres- sure switches, the set point may be adjusted without removing the cover and is visible on a calibrated scale. SHOP NOW 01 Kele Insights | Volume IV / 2018 kele.com | 877.826.9047 | [email protected] KELE INTRODUCES PRODUCT MATCHING SOLUTION Initiative enhances customer user experience and buying process Need to quickly find a product accessory? What about an alternative to a tariffed part? A new feature on kele.com makes this process simple and intuitive. Customers can now view and select accessories, related products, and direct or functional alternatives on the same page/screen as the original product they intend to buy. Last month, Kele launched phase one of its product matching solution on kele.com across 50 frequently purchased products. A selection of products affected by the recent 25 percent tariff on Chinese imports was also included. As suppliers continue to pass along tariff costs, these product alternatives will be added where relevant. Although uncommon on most BAS e-commerce platforms, customers will find the user experience familiar and similar to many top-tier consumer e-commerce sites. Customers will soon see what other customers typically buy when buying the product they are currently viewing as well as top sellers overall on kele.com. “What started as an effort to respond to the tariff impact quickly evolved into a bigger opportunity to help our customers win,” said Chief Marketing Officer John Strawn. “The goal is to provide as many relevant solutions as possible and do that as seamlessly as possible.” In addition to “Customers Also Bought” and “Top Sellers,” phase two of the product matching initiative will expand to 1,000 frequently purchased items. Subsequent phases with more products added will follow. Kele Product Matching Defined Types of Substitution Added Parts to Help Installation Go Smoothly Direct Alternative Accessories A product that does exactly what the original Parts typically required to complete installation product does in the way of “fit, form, and or application of the product. function.” Other accessories provided by the supplier of the product—sometimes required for installation Functional Alternative or application. A product that performs the essential functions that the original product can perform. Related Product Other parts that complement the use of the product. 02 Kele Insights | Volume IV / 2018 kele.com | 877.826.9047 | [email protected] Is Your BAS Ready for the Cold? It is now a popular quote to hear that “Winter is coming!” While this is fun to say for Game of Thrones fans, the truth of the matter is winter is here. Did you perform maintenance checks on your HVAC system? Making sure the equipment in your customers’ buildings is ready for the cold temperatures is very important from not only a comfort level but also from a cost perspective. Below is a basic checklist to help you winterize your commercial building. THE VERY FIRST THING TO DO! A good basic first step is to determine what isn’t working prior to needing it. Test your heating system now to find issues before it’s too late. Bump up your temperature setpoints, place your units in test mode, or fake out your outdoor air temperature sensor with a bag of ice. Run your building through its paces now. 1. Freeze Protection with Low Temperature Controls (freeze-stats) Check that you have the proper controls and that they are working correctly. Freeze stats and low-temperature cutout controls are installed to protect your coils. Testing is not as simple as hitting a button because during install, the copper tubing holding the temperature sensitive gas can be compromised. Here are some tips on how to test your controls: • Make sure they are installed in the correct location: directly downstream of the hot water coil (upstream of your cooling coil) in a horizontal serpentine fashion spaced evenly across the coil. This location will prevent false trips and provide full coil coverage. • If the freeze stat comes with an adjustable temperature setting, set the temperature as low as you feel comfortable with without dropping below freezing (35°F is typical). • Buy freeze spray or ice and physically apply to 12˝–18˝ of the serpentine copper tubing that holds the temperature sensitive gas vapor. The gas vapor pressure will drop and cause the freeze stat to trip. • Verify the sequence of operations that occurs or that is supposed to occur when the freeze stat trips. This will typically include a shutdown of unit fans, closing of the outdoor air damper, and an opening of the hot water valve. • Once complete, you will need to reset the freeze stat if it does not do so automatically. In some cases, you may need to physically reset the freeze stat as well as clear any front-end alarms that have been programmed to prevent the unit from automatically restarting after a freeze condition. 2. Check All Filters If you are changing on a schedule or using filter differential pressure monitors to report filter condition to your building monitoring system (BMS), it’s a good idea to physically check your filters this time of year. Clogged or weather dampened filters can cause your unit to provide lower BTUs of heat than designed. 3. Check and Clean Coils Like filters, a dirty coil can cause your unit to provide lower BTUs of heat than designed. 03 Kele Insights | Volume IV / 2018 kele.com | 877.826.9047 | [email protected] 4. Check the Outdoor Air Dampers Physically verify that your outdoor air dampers are actuating open and closed as required. If your dampers are tough to access, monitor the mixed air temperature at the front end after commanding the damper open and closed. If the damper is working, the mixed air temperature sensor will reflect that. 5. Check the Outdoor Air Temperature Sensors Verify the accuracy of the outside temperature sensors. In most systems, the boiler relies on this temperature to decide how hot the hydronic system needs to be to properly heat the building. In addition, the air handling units use outdoor air temperature to help decide if the economizer mode (if applicable) should be utilized. In both situations, an accurate outdoor air temperature saves you money and headaches. 6. Clean the Condensate Drains Check your condensate drains and verify they are clean and clear of debris. Afterwards, pour some water down the drain and make sure it works. In cold climates with rooftop units, insulation and heat tape may be required to keep these drains from freezing so your units can keep running. 7. Check Piping Insulation Make sure your piping insulation remains intact and complete. Exposed piping can cause major damage and should be checked regularly. 8. Proper Equipment Winterization Many equipment manufacturers have required maintenance procedures to make sure the system is properly winterized. Refer to the equipment installation or operating manuals to make sure the cooling system is prepared prior to a freezing situation. Kele has what you need to get your system ready for the freezing temperatures. These are just a sample of some products Kele offers to help you get ready for the cold. Give us a call at 877.826.9047 or visit kele.com if you have questions specific to your job, Kele is here to help. A11 SERIES: DS-2C: L480 SERIES: LOW-LIMIT TEMP CONTROLLER RAIN/SNOW SENSOR CONTROLLER LOW-LIMIT TEMP CONTROLLER The A11 Series Low Temperature Limit The ASE DS-2C provides reliable rain and These low-limit controllers operate electric Controls incorporate a 20´ (6 m), snow detection and control for commercial dampers, valves, and compressor or fan vapor-charged sensing element for HVAC or residential applications. It detects rain to motors to provide temperature or limit control applications and building automation systems. control motorized windows, roof vents, of air conditioning systems and refrigeration The low-temperature sensor reacts to the window wipers, etc., and detects snow to units. The L480B has an SPDT switch and coldest 16˝ (40.6 cm) section of the control’s control snow melt and deicing systems for automatically resets; the L480G has an SPST sensing element. It is suitable for monitoring wheelchair ramps, stairways, driveways, switch that opens on a fall in temperature and the trailing face of a coil for freeze protection. loading docks, roofs, and more. requires manual reset. 04 Kele Insights | Volume IV / 2018 kele.com | 877.826.9047 | [email protected] Remember Capacity & Consumption When Selecting an Electronic to Pneumatic Transducer When it comes to selecting an electronic to pneumatic (E/P) transducer, the type of input and the pressure range of the output are the most common selection criteria considered.
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