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Environmental Guidelines

DVN 5000

24-10520-22 Rev. –

23

This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2009 Johnson Controls, Inc.

If the rack has a vented rear door (bottom-only is proper for top mounted fans), less 
rackmount venting is required. Visual approximation is adequate for determining 
how many vented rackspaces are required in this situation.

N

OTE

Figure 12: Sample Rack Fans (Middle Atlantic Products Models Shown)

The overall vented area must not be less than specified in Table 3.

Vented Shelves

Shelves are an important component of the internal airflow planning process. Shelf 
surfaces that overhang the internal natural rise of heat should be vented.

Figure 13: Sample Vented Shelf (Middle Atlantic Products Model U317 Shown)

Any obstruction to airflow raises the temperature in the lower portion of the rack, 
possibly creating a stratification zone (or heat layer), and should be avoided if 
possible.

Table 3: Minimum Number of Vented Rackspaces for Forced Air (Fans)

Fan Qty.

Fan Size (Inches)

Minimum Number of Vented Rackspaces

1

4

2 spaces

2

4

3 spaces

3

4

4 spaces

4

4

5 spaces

1

10

6  spaces

1

H10

8 spaces

Содержание DVN 5000 Series

Страница 1: ...Storage Shipping and Environmental Guidelines Digital Vision Network 5000 Series October 2009 24 10520 22 Revision...

Страница 2: ...uction manual may cause interference to radio communications It has been tested and found to comply with the limits for a Class A computing device pursuant to Part 15 of FCC Rules which are designed t...

Страница 3: ...re technical support assistance contact the Johnson Controls Product Sales Team at 1 800 ASK JNSN 1 800 275 5676 for 24 hour assistance in the USA Technical Support at 805 582 3117 menu option 5 in th...

Страница 4: ...uipment s warranty If you wish to keep your current data drives purchase new data drives and ship the new ones back with the RMA External DVN 5000 disk drives must be removed from the chassis prior to...

Страница 5: ...drives with the RMA by exporting video to one or more DVDs For more information on exporting video refer to the DVN 5000 Series Software Installation and Configuration Manual which can be downloaded f...

Страница 6: ...to the guidelines previously described Viewing the DVN s Current Network Settings Since you may need to manually reconfigure the DVN s network settings once the DVN is returned to you from the repair...

Страница 7: ...ve the DVN configuration settings to a USB flash drive so that they can be uploaded imported if necessary once the DVN is returned to you from the repair center If you do not export the system configu...

Страница 8: ...ration screen appears 5 Enter a descriptive name for the configuration file so the DVN configuration can be easily identified amongst other DVN configuration files 6 Save the configuration file to you...

Страница 9: ...s this may cause the unit to overheat Leave room at the back and right side on newer cases of the DVN since these areas are the hot air exits Since the 19 inch rack has a high concentration of heat in...

Страница 10: ...ne RAID drive message 2 Open the front panel and monitor the status Light Emitting Diode LED of each RAID drive A red LED indicates the drive has failed and must be replaced For information on replaci...

Страница 11: ...own Thermal design of equipment racks and enclosures is essential for the continued functioning of DVN equipment when subjected to the surrounding environment The most robust designs for thermal manag...

Страница 12: ...void common mistakes use the following guidelines when considering the thermal design of equipment racks and enclosures for use with the DVN 5000 product Important Considerations Consider how the room...

Страница 13: ...temperature levels A room that is too hot results in DVN drive failures A room that is too cold can generate condensation damaging the DVN s internal components Locating the racks directly under supp...

Страница 14: ...ir In general it is more effective to work with natural convection and remove the heated air from the top of the rack while letting cooler room air enter at or near the bottom Several examples are sho...

Страница 15: ...roprietary information of Johnson Controls Inc 2009 Johnson Controls Inc Enclosure Designs For passive convection no fan applications wider racks are beneficial spacious sides around mounted equipment...

Страница 16: ...y way to introduce air is through the front of the rack Additionally incorporating a fan top is the best way to exhaust the air When top mount fans are required select an enclosure without venting bui...

Страница 17: ...he equipment Radiated Dissipation Non vented solid areas of all racks dissipate internal heat to the outside by radiation As the internal temperature rises so does the temperature of the sheet metal e...

Страница 18: ...it none in the middle for effective chimney flow and an unimpeded airflow inside the rack When using passive convection limit the number of DVN 5000 units in a rack to 1 Installing additional DVNs or...

Страница 19: ...ssis The following diagrams show this arrangement with passive convection As with any passive convection scheme the more venting up top the better Choose racks that have vents built into the top face...

Страница 20: ...Forced Air Active Thermal Management In certain cases when there is too much heat BTU Hr for natural convection to properly perform this task it is essential to force the heated air from the rack Acti...

Страница 21: ...ommended in this situation to control airflow from front to rear However adequate 6 minimum clearance needs to be between the rear door and rear exhaust outlets of the equipment It is important to not...

Страница 22: ...9 Johnson Controls Inc A high performance alternative method for forced air heat removal in thermally dense installations can be achieved through the use of a high CFM rear door These doors typically...

Страница 23: ...Vented Floor Grate with High Density Servers Network Video Recorders NVRs and Switches Environmental Guidelines DVN 5000 24 10520 22 Rev 21 This document contains confidential and proprietary informa...

Страница 24: ...ollowing are minimum recommendations on the number of rackspaces of venting needed more venting is better if properly placed See the diagrams elsewhere in this document for proper and improper vent pl...

Страница 25: ...nted area must not be less than specified in Table 3 Vented Shelves Shelves are an important component of the internal airflow planning process Shelf surfaces that overhang the internal natural rise o...

Страница 26: ...s Condensation increases equipment downtime The ideal spot for fan placement in clean environments is in the top of the rack where the hotter air needs to be removed This also aids the natural force o...

Страница 27: ...re than any other component Since fans wear out faster at higher speeds the most practical way to extend fan life is to use a proportional speed thermostatic fan control circuit which extends equipmen...

Страница 28: ...k fan will increase the airflow As you can see from the Parallel vs Series Fans chart Figure 17 on page 27 all this provides is a greater static pressure It does not increase the airflow The only way...

Страница 29: ...Controls Inc Filters Rack filters which can be mounted over fans or used as a filtered vent panel help protect digital and other sensitive equipment from hygroscopic dust failure i e when dust absorb...

Страница 30: ...t For example the filters must be cleaned after the drywall is installed since drywall dust effectively blocks the filter Filter loading and subsequent maintenance requirements can be greatly reduced...

Страница 31: ...f Forced Air Filtered without Front Intakes on Equipment Environmental Guidelines DVN 5000 24 10520 22 Rev 29 This document contains confidential and proprietary information of Johnson Controls Inc 20...

Страница 32: ...ced Air Filtered with and without Front Intakes on Equipment DVN 5000 Environmental Guidelines 30 24 10520 22 Rev This document contains confidential and proprietary information of Johnson Controls In...

Страница 33: ...Racks Pressurizing the rack rather than sucking the air out of the top is the best solution for dusty or dirty environments where filters need to be changed regularly Figure 20 Correct Use of Pressur...

Страница 34: ...anufacturers Association NEMA should be installed Heat exchangers and air conditioning units mostly installed in NEMA rated racks do not allow the ambient dirty air to mix with the enclosure interior...

Страница 35: ...some enclosures other enclosures will not get the required airflow and equipment may overheat Airflow under the computer floor must be directed and managed which can only be accomplished by measuring...

Страница 36: ...c 2009 Johnson Controls Inc A balanced system uses cool air effectively by not allowing it to re circulate back to the HVAC unit without removing heat In a data center system designed for airflow the...

Страница 37: ...etary information of Johnson Controls Inc 2009 Johnson Controls Inc To introduce cool air into enclosures on a raised computer floor provide an air outlet grate in front of the rack recommended see Fi...

Страница 38: ...arrangement in rows of two to produce both hot and cold aisles see Figure 24 The front of the racks face each other in the cold aisle with air grating down the center for cold air supply The rear of...

Страница 39: ...btain minimum ventilation requirements 1 Mark ambient room temperature in column C and connect points in B and C with a straight edge 2 The minimum cooling required providing an interior rack temperat...

Страница 40: ...mograph for Calculating Required Ventilation DVN 5000 Environmental Guidelines 38 24 10520 22 Rev This document contains confidential and proprietary information of Johnson Controls Inc 2009 Johnson C...

Страница 41: ...ck enclosures Vent blockers magnetized on one side help force the heated enclosure air out through top mounted exhaust fans Upper Inside Side Panel Upper Inside Rear Door Enclosure Upper Faces Vibrati...

Страница 42: ...quick short term fix open the rear door and place a floor fan facing the rear to lower the rack s temperature Do not use this method as a long term fix however it may keep heat sensitive equipment wo...

Страница 43: ...the RAID drive LEDs for any data drives that may be in a critical state or that have failed The log file will show critical RAID drives Replace these drives 8 Review the log file for specific errors...

Страница 44: ...nation point Where circuits are outfitted with ground fault detection test to ensure correct tripping and reset 9 Where present inspect the lens wiper blade and ensure correct operation over the compl...

Страница 45: ...ete all applicable forms Task Description Date Performed 1 Visually and physically inspect all cable connectors 2 Visually inspect unit for damage or contamination 3 If applicable clean floppy drive u...

Страница 46: ...5 Check for correct battery venting and air flow 6 Bypass the main s input direct to load 7 Measure battery charge voltage 8 Isolate the main s input and check output voltage 9 Visually inspect unit...

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