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General Site Preparation Guidelines

Electrical Factors

Chapter 2

13

Sources of Voltage Fluctuations

Voltage fluctuations, sometimes called glitches, affect the quality of electrical power. Common sources of these
disturbances are:

•

Fluctuations occurring within the facility’s distribution system

•

Utility service low-voltage conditions (such as sags or brownouts)

•

Wide and rapid variations in input voltage levels

•

Wide and rapid variations in input power frequency

•

Electrical storms

•

Large inductive sources (such as motors and welders)

•

Faults in the distribution system wiring (such as loose connections)

•

Microwave, radar, radio, or cell phone transmissions

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Summary of Contents for Integrity rx5670

Page 1: ...hp Integrity rx5670 Site Preparation Guide Product ID A6837B A6838B Manufacturing Part Number rx5670_SitePrep July 2003 U S A Copyright 2003 Hewlett Packard Development Company L P ...

Page 2: ...graphs c 1 and c 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 for other agencies HEWLETT PACKARD COMPANY 3000 Hanover Street Palo Alto California 94304 U S A Copyright Notices Copyright 2003 Hewlett Packard Development Company L P Reproduction adaptation or translation of this document without prior written permission is prohibited except as allowed under the cop...

Page 3: ... Breaker Sizing 12 Power Quality 12 Distribution Hardware 14 Grounding Systems 15 System Installation Guidelines 19 Environmental Elements 20 Computer Room Preparation 20 Cooling Requirements 20 Humidity Level 22 Dust and Pollution Control 23 Metallic Particulate Contamination 23 ESD Prevention 24 Acoustics 24 Facility Characteristics 26 Floor Loading 26 Windows 28 Space Requirements 29 Delivery S...

Page 4: ...Contents 4 Power Cable 43 Glossary 45 ...

Page 5: ...imum configurations for an hp Integrity rx5670 Table 1 1 Minimum Maximum Configuration System Name Minimum Maximum CPUs 1 4 Power Supplies 2 3 Memory Extenders 1 2 DIMM Sets 4 DIMMs per set 1 12 Optional Internal Disks 0 4 Optional Internal Media 0 1 DVD ROM or 1 DAT drive Core I O 2 2 Optional I O 0 10 ...

Page 6: ...m Maximum Quantity per Cabinet Cabinet 17 60 44 70 30 00 76 2 12 00 7 EIA Units 30 48 N A Power Supplies 3 9 9 91 16 5 41 91 3 9 9 91 3 PCI Cards a a The dimensions will vary depending on the PCI card installed varies varies varies 12 Table 1 3 System Weight System Weight kg Fully configured system 4 way a a This weight is representative of the system before it is installed in a rack 175 00 lbs 79...

Page 7: ...er receptacles located at the bottom rear bulkhead A minimum of two power supplies cords must be used to maintain normal operation of the system A third power supply cord can be added to improve system availability by protecting for example against power source failures or accidentally tripped circuit breakers System Power Requirements Table 1 4 Power Requirements Requirements Value Comments Nomin...

Page 8: ...sive applications These are generally lower than maximum power numbers due to the fact that getting all of the subsystems in the box to simultaneously draw maximum power for long durations is uncommon Table 1 5 Typical Power Consumptiona a Theoretical Maximum Power with future upgrades is 2089 Watts AC CPU s DIMM s Sets of 4 PCI Cards Volt Amps Watts AC Amps 115V with 3 Power Supplies Amps 230V wi...

Page 9: ...e specification for the HP Server is as follows 60 db LpA sound pressure level at bystander position The above level is appropriate for dedicated computer room environments not office environments Care should be taken to understand the acoustic noise specifications relative to operator positions within the computer room or when adding HP Servers to computer rooms with existing noise sources Air Fl...

Page 10: ...System Specifications Environmental Specifications Chapter 1 10 ...

Page 11: ...es and the limitations of the power systems for computer and data processing equipment In general a well designed power distribution system exceeds the requirements of most electrical codes A good design when coupled with proper installation practices produces the most trouble free operation A detailed discussion of power distribution system design and installation is beyond the scope of this info...

Page 12: ...consider whether access to the server will be at the front the side or the rear of the server Power Consumption When determining power requirements you must consider any peripheral equipment that will be installed during initial installation or as a later update Refer to the applicable documentation for such devices to determine the power required to support these devices Electrical Load Requireme...

Page 13: ...s are Fluctuations occurring within the facility s distribution system Utility service low voltage conditions such as sags or brownouts Wide and rapid variations in input voltage levels Wide and rapid variations in input power frequency Electrical storms Large inductive sources such as motors and welders Faults in the distribution system wiring such as loose connections Microwave radar radio or ce...

Page 14: ...tional Online uninterruptible power supply UPS Keeps input voltage to devices constant and should be considered if outages of one half cycle or more are common Refer to qualified contractors or consultants for each situation Distribution Hardware This section describes wire selection and the types of raceways electrical conduits used in the distribution system Wire Selection Use copper conductors ...

Page 15: ...ectrical boxes so as to provide a continuous grounding system Power Panel Ground Each power panel should be grounded to the electrical service entrance with green green yellow wire ground conductors The green green yellow wire ground conductors should be sized per applicable codes based on circuit over current device ratings NOTE The green wire ground conductor mentioned above may be a black wire ...

Page 16: ...fore a ground strap customer supplied should be used for connecting the system cabinet to the site grounding grid customer supplied When connecting this ground ensure that the raised floor is properly grounded for high frequency Power panels located in close proximity to the computer equipment should also be connected to the site grounding grid Methods of providing a sufficiently high frequency gr...

Page 17: ...ing grid to the subfloor The grounding grid should be made of copper strips mounted to the subfloor The strips should be 0 032 in 0 08 cm thick and a minimum of 3 0 in 8 0 cm wide Connect each pedestal to four strips using 1 4 in 6 0 mm bolts tightened to the manufacturer s torque recommendation Better A grounded 6 AWG minimum copper wire grid mechanically clamped to floor pedestals and properly b...

Page 18: ...General Site Preparation Guidelines Electrical Factors Chapter 2 18 Figure 2 1 Raised Floor Metal Strip Ground System 60SP010A 11 30 99 ...

Page 19: ...metals Therefore the integrity of an electrical connection depends on the restraining force applied Connections that are too tight compress or deform the hardware and cause it to weaken This usually leads to high impedance preventing circuit breakers from tripping when needed or can contribute to a buildup of high frequency noise CAUTION Connections that are too loose or too tight can have a high ...

Page 20: ... vapor barrier installed around the entire computer room envelope to restrain moisture migration Caulk and vapor seal all pipes and cables that penetrate the envelope Use at least a 12 inch raised floor system for minimum favorable room air distribution system underfloor distribution Ensure a minimum clearance of 12 inches between the top of the hp Integrity rx5670 cabinet and the ceiling to allow...

Page 21: ...imum rating of 45 based on ASHRAE Standard 52 76 Dust Spot Efficiency Test Introduce only enough outside air into the system to meet building code requirements for human occupancy and to maintain a positive air pressure in the computer room Air Conditioning System Types The following three air conditioning system types are listed in order of recommendation Complete self contained package unit s wi...

Page 22: ...ffuser system grilles to direct the cooling air downward around the front of the hp Integrity rx5670 cabinets The supply air is then available near the cooling air intake vents of the hp Integrity rx5670 cabinets Air Conditioning System Installation All air conditioning equipment materials and installation must comply with any applicable construction codes Installation of the various components of...

Page 23: ... policy Cigarette smoke particles are eight times larger than the clearance between disk drive read write heads and the disk surface Printer Locate printers and paper products in a separate room to eliminate paper particulate problems Eating or drinking Establish a no eating or drinking policy Spilled liquids can cause short circuits in equipment such as keyboards Tile floors Use a dust absorbent ...

Page 24: ... when laying tiles Use conductive wax if waxed floors are necessary Ensure that all equipment and flooring are properly grounded and are at the same ground potential Use conductive tables and chairs Use a grounded wrist strap or other grounding method when handling circuit boards Store spare electronic modules in antistatic containers Acoustics Computer equipment and air conditioning blowers cause...

Page 25: ...hapter 2 25 Dropped ceiling Cover with a commercial grade of fire resistant acoustic rated fiberglass ceiling tile Sound deadening Cover the walls with curtains or other sound deadening material Removable partitions Use foam rubber models for most effectiveness ...

Page 26: ...lation Raised Floor Loading Raised floor loading is a function of the manufacturer s load specification and the positioning of the equipment relative to the raised floor grid While Hewlett Packard cannot assume responsibility for determining the suitability of a particular raised floor system it does provide information and illustrations for the customer or local agencies to determine installation...

Page 27: ...d is other than a Tate Series 800 floor the specific floor manufacturer must be contacted to evaluate the floor being used The following table lists specifications for the Tate Access Floors Series 800 raised floor system Table 2 2 Floor Loading Term Definitions Term Definition Dead load The weight of the raised panel floor system including the understructure Expressed in lb ft2 kg m2 Live load Th...

Page 28: ...ia is damaged if exposed to direct sunlight Also the heat generated by sunlight places an additional load on the cooling system Concentrated loadb 1250 lb 567 kg Ultimate load 4 000 lb 1814 kg per panel Rolling load 400 lb 181 kg Average floor load 500 lb 227 kg a From Table 2 2 on page 27 b With 0 08 in 0 2 cm of span maximum deflection Table 2 3 Typical Raised Floor Specifications Continued Item...

Page 29: ...lan equipment layout to take advantage of lighting and utility outlets Do not forget to include clearance for opening and closing equipment doors Clearance around the cabinets must be provided for proper cooling airflow through the equipment If other equipment is located so that it exhausts heated air near the cooling air intakes of the hp Integrity rx5670 cabinets larger space requirements are ne...

Page 30: ...General Site Preparation Guidelines Space Requirements Chapter 2 30 Equipment cable routing ...

Page 31: ...tors used in this document as well as additional conversion factors which may be helpful in determining those factors required for site planning Conversion Factors Refrigeration 1 watt 86 kcal h 1 watt 3 412 Btu h 1 watt 2 843 x 10 4 tons 1 ton 200 Btu min 1 ton 12 000 Btu h 1 ton 3 517 2W Metric Equivalents 1 centimeter 0 3937 in 1 meter 3 28 ft 1 meter 1 09 yds 1 in 2 54 cm 1 ft 0 305m 1 CFM 1 7...

Page 32: ... and delivery survey mailed to Hewlett Packard Site inspection and predelivery coordination meeting arranged with a Hewlett Packard representative to review the inspection checklist and arrange an installation schedule 7 days before installation Final check made with HP site preparation specialists to resolve any last minute problems NOTE Not all installations follow a schedule like the one noted ...

Page 33: ...tive Order No Representative making survey Date Scheduled delivery date Table 2 5 Site Inspection Checklist Please check either Yes or No If No include comment or date Comment or Date Computer room No Area or condition Yes No 1 Is there a completed floor plan 2 Is there adequate space for maintenance needs Front 36 in 91 4 cm minimum Rear 36 in 91 4 cm minimum are recommended clearances 3 Is acces...

Page 34: ...nce 14 Are there AC outlets available for servicing needs i e vacuuming 15 Does the input voltage correspond to equipment specifications 15A Is dual source power used If so identify type s and evaluate grounding 16 Does the input frequency correspond to equipment specifications 17 Are lightning arrestors installed inside the building 18 Is power conditioning equipment installed 19 Is there a dedic...

Page 35: ...and up to 10 000 ft 28 Can temperature changes be held to 10 C per hour with tape media Can temperature changes be held to 20 C per hour without tape media 29 Can humidity level be maintained at 40 to 60 at 35 C noncondensing 30 Are air conditioning filters installed and clean Storage No Area or condition Yes No 31 Are cabinets available for tape and disc media 32 Is shelving available for documen...

Page 36: ...ndations should be entered on the special instructions or recommendations form The following list gives examples of special instructions or issues Packaging restrictions at the facility such as size and weight limitations Special delivery procedures Special equipment required for installation such as tracking or hoists What time the facility is available for installation after the equipment is unl...

Page 37: ...General Site Preparation Guidelines Delivery Survey Chapter 2 37 Figure 2 2 Delivery Survey Part 1 60SP018A 12 7 99 ...

Page 38: ...General Site Preparation Guidelines Delivery Survey Chapter 2 38 Figure 2 3 Delivery Survey Part 2 60SP019A 11 24 99 ...

Page 39: ...The following provides the site preparation specialist with the knowledge of what to expect to receive based on the regional shipping destination Female End of Power Cable The female end of the power cable is a C15 type plug that mates with the receptacle in each power supply installed in the HP Server Figure 3 1 Male Receptacle at power supply Figure 3 2 C15 Female Plug on one end of the power co...

Page 40: ...e The male plug on the other end of the power cable will vary depending on the region the HP Server is shipped to Several examples follow though this list is not meant to be all inclusive Figure 3 3 Unterminated Plug Figure 3 4 L6 20 Plug Figure 3 5 IEC 309 Plug Figure 3 6 CEE 7 7 Plug ...

Page 41: ...Power Plug Configuration Male End of Power Cable Chapter 3 41 Figure 3 7 L6 30 Plug Figure 3 8 NEMA 5 20P Plug Figure 3 9 ISI 32 Plug fig007 ...

Page 42: ...Power Plug Configuration Male End of Power Cable Chapter 3 42 Figure 3 10 GB 1002 Plug ...

Page 43: ...le Chapter 3 43 Power Cable The power cable length and configuration will vary based on the region the server ships to This is an example of one power cable configuration used to supply power to the server Figure 3 11 L6 20 Power Cable ...

Page 44: ...Power Plug Configuration Power Cable Chapter 3 44 ...

Page 45: ...uals 1 75 inches 1U equals 44 45 mm Humidification The process of adding moisture to the air within a critical space Inrush current The peak current flowing into a power supply the instant AC power is applied This peak is usually much higher than the typical input current due to the charging of the input filter capacitors When switching power supplies are first turned on they present high initial ...

Page 46: ...ing worst case conditions thermal tolerances workloads and so forth on all system components It is extremely unlikely that any customer will experience this level of power consumption Tonnage The unit of measure used in air conditioning to describe the heating or cooling capacity of a system One ton of heat represents the amount of heat needed to melt one ton 2 000 lbs of ice in one hour 12 000 Bt...

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