A computer room air conditioning (CRAC) unit is a device that monitors and maintains the temperature, air distribution and humidity in a network room or data center. CRAC units are replacing air-conditioning units that were used in the past to cool data centers. According to Industrial Market Trends, mainframes and racks of servers can get as hot as a seven-foot tower of powered toaster ovens, so climate control is an important part of the data center's infrastructure. There are a variety of ways that the CRAC units can be situated. One CRAC setup that has been successful is the process of cooling air and having it dispensed through an elevated floor. The air rises through the perforated sections, forming cold aisles. The cold air flows through the racks where it picks up heat before exiting from the rear of the racks. The warm exit air forms hot aisles behind the racks, and the hot air returns to the CRAC intakes, which are positioned above the floor. >> Stay up to date by receiving the latest IT term daily.

Simply check "Word of the Day" to register.prices for hvac systemsLeider konnte die von Ihnen aufgerufene Seite nicht gefunden werden.best rated 4 ton ac unit Möglicherweise haben Sie eine falsche Internet-Adresse eingegeben, das Dokument existiert nicht mehr oder der Name des Dokuments wurde geändert.outside ac unit stays on Gerne können Sie nun unsere Suche nutzen, um die von Ihnen gewünschten Informationen zu erhaltenoder Sie besuchen unsere Startseite.Unfortunately, we haven't been able to find the page you were looking for. If you typed in a URL, please make sure you have entered it correctly. It is also possible that the page you are looking for has been moved or deleted. To find the requested information, please type in the term you are looking for into our Search,

or visit our home page.Two motors means The MACH 8 DELIVERS the same high BTUs of cooling on both high and low speed operation. The Mach 8 has the HIGHEST air flow delivery on high speed, and ULTRA QUIET on low speed for night time cooling. Industry EXCLUSIVE molded one piece fiberglass base pan provides excellent durability with reduced weight. Mach 8 - Cub Mach 8 - 13,500 Mach 8 - 15,000 MACH 8 Rooftop A/C Installation Instructions MACH 8 Rooftop A/C Operation & Maintenance Instructions Limited Two Year A/C Warranty - Domestic U.S. MACH 8 Product Literature MACH 8 International Installation Instructions MACH 8 International Data SheetPanasonic HVAC Datasheets for Air Conditioners Air conditioners and building air conditioners are used in industrial, process computing, networking, and other spaces where thermal management is important.  Space and spot cooling equipment are used wherever total heat must be controlled or where localized heat sources must be managed. 

Many refrigerants are used in air conditioners; CFC-free refrigerants are becoming more prevalent and in fact are required in many applications. Air Conditioners: Learn more Other Datasheet Catalogs for Panasonic HVACAll downloads are Adobe PDFs unless otherwise noted. Click to view, or right click, then "Save As…" to download files. If you do not have Adobe Reader, use the button on the left to download the most recent version. Please be patient, as some of the files may be fairly large. Product information is updated on a regular basis. Please This email address is being protected from spambots. You need JavaScript enabled to view it. if you are unable to find what you are looking for. Let us help you get the correct HVAC system for application. The AC-PRO-II® is 55% smaller than the original AC-PRO® and has the standard trip unit functions of Long-Time, Short-Time, Instantaneous and Ground Fault. The AC-PRO-II® also includes the following additional features.

UL and CE Certification To ensure that the AC-PRO-II® will function when needed it was tested to the ANSI C.37.59 Standards for fault interruption. As a result of this testing the AC-PRO-II® is UL listed on a variety of breakers. Please see the AC-PRO-II® UL Listings table for a compete breakdown. The UL mark is in the process of being updated and modernized by UL. When Utility Relay Company designed the AC-PRO-II® we decided to use the new enhanced version of the UL mark so we would be compliance with any future UL regulations. The SAFETY US-CA wording on the UL label designates that our product has been evaluated to United States and Canadian safety requirements. If you have more questions about this please visit the UL website for more details. UL-Marks for North America The E number at the bottom of the mark is a unique identifier that can be used to access more information about the products UL certification. Information about Utility Relay Company's E number can be found here: UL AC-PRO® Product Family

The AC-PRO-II® was tested & is certified to withstand radio frequency interference per the ANSI C37.90.2 Standard The CTs, Actuators and wiring harness from the original AC-PRO® can be used with the AC-PRO-II®. This makes upgrading the trip unit very simple and fast. RS485 Modbus RTU communications is standard on every AC-PRO-II®. The AC-PRO-II® can be integrated into various industry standard HMI systems that have a Modbus RTU driver. A few examples are: The front mounted and electrically isolated USB port allows for easy downloading of trip data and protection settings. It can also be used to upload the trip unit settings, making commissioning the trip unit much faster. NOTE: If the AC-PRO-II® is located behind a cubicle door, a USB panel mount extension will be provided with the retrofit kit. Click here to see details on the USB panel mount extension. Settings are programmed using the OLED multi-line display and smart buttons that change their function according to the information displayed.

All of the settings are entered using simple parameters. No percentages or multipliers are required. The easy to read multi-line display provides real time monitoring of 3-phase, neutral and ground fault currents. The display unit can be rotated to allow the trip unit to fit in a variety of different breaker configurations. The trip units retains all of the trip data for that last 8 trip events. This data includes a date and time stamp of each event from the integrated real time clock. The waveforms are also captured for each of the 8 trip events. The AC-PRO-II® is compatible with the QUICK-TRIP® Arc Flash Reduction system. The QUICK-TRIP® system is a manually controlled arc flash hazard reduction system. It can reduce trip times when turned on and allows selective coordination between circuit breakers when turned off. If maintenance personnel must work on energized equipment, they will first turn the QUICK-TRIP® system on at the upstream breaker feeding the equipment or breaker.

fault now occurs, the upstream breaker will trip quickly based on the QUICK-TRIP® settings reducing the Arc Flash When the maintenance work is finished, the QUICK-TRIP® system is turned off and the original selective coordination is back in effect. The AC-PRO-II® is user configurable for 50Hz or 60Hz applications. The green LED indicates that the trip unit is operating properly. The "Self-Test OK" feature performs the following: All AC-PRO-II®’s come with a 2-year limited warranty. Whenever voltage and power data is necessary, a VDM (Voltage Divider Module) can be attached to the back of the AC-PRO-II® trip unit. With the VDM the following data is available on the display and through RS485 Modbus RTU communications. A graphical User Interface application called the InfoPro-AC is available for easy interface between a laptop computer and the USB port on the AC-PRO-II®. The InfoPro-AC will provide access to the following items: The patented Sluggish Breaker® operation detection captures the interruption time for a first trip.