Generic Site Preparation Guide HP Part Number: 5991-6018_ed6 Published: July 2010 Edition: 6
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Table of Contents 1 General Site Preparation Guidelines...........................................................................7 Electrical Factors.....................................................................................................................................7 Synopsis.............................................................................................................................................7 AC Electrical Distribution System...........................................
Cooling Requirements.....................................................................................................................21 Basic Air-Conditioning Equipment Requirements....................................................................21 Air-Conditioning System Guidelines.........................................................................................22 Air-Conditioning System Types.................................................................................................
List of Figures 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 1-9 1-10 1-11 1-12 1-13 1-14 Raised Floor Metal Strip Ground System......................................................................................15 C20 Male Receptacle (at Power Supply)........................................................................................29 C19 Female Plug (on One End of the Power Cord).......................................................................29 Unterminated Plug..........................................
List of Tables 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 6 Maximum Contaminant Gas Levels..............................................................................................21 Effect of Humidity on ESD Charge Levels....................................................................................24 Floor Loading Term Definitions....................................................................................................25 Typical Raised Floor Specifications........................................
1 General Site Preparation Guidelines This guide contains recommendations and best practices to improve site efficiency and tolerance before installing or operating any Business Critical products. The Best Practices found in this document closely align with third party engineering, such as the ISA G11 environments.
• • • • Electrical infrastructure is rated for maximum load. The distance from a receptacle to power source X0 is less than 75 feet (23 m). There are no daisy-chained receptacles or hot, neutral, or ground wires. The system is sourced from higher distribution voltages. AC Power Quality Devices HP products have a wide range of voltage tolerances. In general, approximately 10% of the nominal voltage is sufficient for the marked electrical-rated voltage.
NOTE: Set cooling for the maximum-rated power output of the room, and develop a growth plan for the cooling infrastructure. Grounding Systems WARNING! Follow electrical code when connecting equipment AC power ground wire to the AC distribution point. Failure to properly ground the equipment or the floor can lead to shock hazard. HP computer hardware has been tested only on systems where protective earth is integral to the electrical distribution system.
Computer Room Safety WARNING! The safety of personnel must be a paramount consideration when performing the following recommendations. Failure to comply can create life-threatening scenarios. Inside the computer room, fire protection and adequate lighting when servicing equipment are important safety considerations. Federal and local safety codes govern computer installations.
Working Space for Product Access The recommended working space for performing maintenance is 3 feet (0.9144 m) from vendor instructed working area. The work space must permit at least a 90-degree opening of equipment doors or hinged panels. When planning for the working-space area, consider whether access to the product will be at the front, the side, or the rear of the product. If no side service is needed, ensure that there is 3 feet clearance in the front or in the rear.
• • • • • • • • 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 Power System Protection Protect the product from the many sources of
Building Distribution Place building feeders and branch circuitry in rigid metallic conduits with proper connectors (to provide ground continuity). Ensure that all conduits that are exposed and subject to damage are constructed of rigid galvanized steel. Grounding Systems HP systems are tested and certified only with grounding systems in which a neutral return path and a protective earth are separate conductors without any inserted impedances.
Dual Power Source Grounding The use of dual power might create an electrical potential that can be hazardous to personnel and might cause performance issues for the equipment. When using dual power sources, measure voltage potentials with a high impedance digital multi-meter (DMM). Dual power sources might originate from two different transformers or two different UPS devices. Measure voltage potentials from ground pin to ground pin of these sources and verify them to be at or near 0.0 V.
Figure 1-1 Raised Floor Metal Strip Ground System Equipment Grounding Implementation Details Connect all HP equipment cabinets to the site ground grid as follows: 1. 2. 3. 4. 5. Check that the braid contact connection points are free of paint or other insulating material and treated with a contact enhancement compound (similar to Burndy Penetrox). Check that the braid contact on each end of the ground strap consists of a terminal and connection hardware (a 1/4-inch (6.0-mm) bolt, nuts, and washers).
NOTE: In domestic installations, install approved receptacles before the HP equipment arrives. See the appropriate installation guide for installation procedures. Acclimatization IMPORTANT: After removal of shipping material, HP recommends allowing the thermal mass of the product to equalize to the temperature and humidity of the installation facility. A minimum of 10°C (50°F) to one hour of temperature difference between the shipping/receiving facility and installation facility is required.
HP equipment will operate in a broad environment within a Controlled Computer room. Temperature can range from 18–27 °C (64.40–80.60 °F) and humidity can range between 20%–80% relative humidity (rh). Use a Best Practice to gain the highest reliability by ensuring the temperature is 20–25 °C (68–77 °F) and humidity range of 40%–50% rh. IMPORTANT: It is very important to ensure consistency in temperature and humidity variables for best results.
Also be aware that the racking cabinets are integral to the proper environmental support for mounted equipment. See the following additional items: • • • Cabinet blanking panels must be used in non-populated U-space levels to prevent unpredictable air mixing. This can lead to No Trouble Found (NTF) diagnosis. Use the highest percentage cabinet perforation possible to allow the proper ventilation in the cabinet. Cabinet doors must be used in the front and the rear.
• • • • • • Computer room preparation Airflow Cooling requirements Humidity level ESD prevention Acoustics Computer Room Preparation Consider the following guidelines to prepare a computer room for a product: • • • • • • • • Locate the computer room away from the exterior walls of the building to avoid the heat gain from windows and exterior wall surfaces.
Dust and Pollution Control Computer equipment can be adversely affected by dust and microscopic particles in the site environment. Specifically, disk drives, tape drives, and some other mechanical devices can have bearing failures resulting from airborne abrasive particles. Dust might also blanket electronic components such as printed circuit boards, causing premature failure due to excess heat or humidity buildup on the boards.
See http://www.isa.org/ for more information. If the environment does not meet G1 levels, third party experts in remediation should be engaged to help bring the site into compliance. This work will include verifying contaminant levels and sources, as well as determining the most effective remediation techniques. Those may include filtration and abatement of the environment by qualified professionals to remove the contaminants.
• • • • Humidification Reheating Air distribution System controls When calculating cooling requirements, include the heat generated by lighting and personnel. For example, a person dissipates about 450 Btus per hour while performing a typical computer room task. At altitudes above 10,000 feet (3,048 m), the lower air density reduces the cooling capability of air-conditioning systems. If your facility is located above this altitude, you might need to modify the recommended temperature ranges.
1. Under-floor air distribution system—Downflow air-conditioning equipment located on the raised floor of the computer room uses the cavity beneath the raised floor as plenum for the supply air. Return air from an under-floor air-distribution system can be ducted return air (DRA) above the ceiling. Locate perforated floor panels (available from the raised floor manufacturer) around the front of the system cabinets.
resistance between connections, leading to equipment failures. High humidity can also have an adverse affect on some magnetic tapes and paper media. CAUTION: Low humidity contributes to undesirably high levels of electrostatic charges. This increases the electrostatic discharge (ESD) voltage potential. ESD can cause component damage during servicing operations. Paper feed problems on high-speed printers are usually encountered in low-humidity environments.
• • • • • • • Maintain recommended humidity level and airflow rates in the computer room. Install conductive flooring (use conductive adhesive 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.
NOTE: Have a floor system consultant for the appropriate flooring environment verify any floor system under consideration for a product installation. 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.
Windows Do not house computers in a room with windows. Sunlight entering a computer room can cause problems. Magnetic tape storage media is damaged if exposed to direct sunlight. Also, the heat generated by sunlight places an additional load on the cooling system. Space Requirements This section contains information about space requirements for the product. Use this data as the basic guideline for space plan developments. Also consider factors such as airflow, lighting, and equipment space requirements.
1 2 3 4 5 The maximum elevation for all operating environmental classes is 3,050 m (10,007 ft). Dry bulb temperature is the regular ambient temperature. Derate maximum dry bulb temperature 1 ºC/300 m (34 ºF/984 ft) above 900 m (2,953 ft). Must be noncondensing environment. Controlled computer room environment is comparable to ASHRAE Class 1 and IEC 60721 Class 3K1. Local product groups must make business decisions for the appropriate values.
• • Equipment cable routing Doors Power Plug Configuration Several power cables are designed for use with HP products. The region the product ships to will determine which power cable ships with the product. Figure 1-2 to Figure 1-11 (page 31) provide an overview of the power plug configurations available. NOTE: The following list is not meant to be all-inclusive nor is this list meant to imply every plug shown is one that is available for the product.
Figure 1-5 L6-20 Plug Figure 1-6 IEC 309 Plug Figure 1-7 CEE 7-7 Plug Figure 1-8 L6-30 Plug Figure 1-9 NEMA 5-20P Plug (left) and receptacle (right) 30 General Site Preparation Guidelines
Figure 1-10 ISI 32 Plug Figure 1-11 GB 1002 Plug Power Cable The power cable length and configuration varies based on the region the product ships to. Figure 1-12 (page 31) provides an example of one power cable configuration used to supply power to the product.
Conversion Factors • Refrigeration — 1 watt = 0.86 kcal/hour — 1 watt = 3.412 Btu/hour — 1 watt = 2.843 × 10-4 tons — 1 ton = 200 Btu/minute — 1 ton = 12,000 Btu/hour — 1 ton = 3,517.2 watts • Metric Equivalents — 1 centimeter = 0.3937 inch — 1 meter = 3.28 foot — 1 meter = 1.09 yards — 1 in. = 2.54 centimeters — 1 ft. = 0.305 meters — 1 CFM = 1.
— — • A signed copy of the site inspection and delivery survey is mailed to HP. Site inspection and predelivery coordination meeting is arranged with an HP representative to review the inspection checklist and to arrange an installation schedule. Seven days before installation — Final check is made with an HP site preparation specialist to resolve any last-minute problems. NOTE: Not all installations follow a schedule like the one previously noted.
Table 1-8 Site Inspection Checklist (continued) Check either Yes or No. If No, include comment number or date. 6. Is the raised floor adequate for equipment loading? 7. Are channels or cutouts available for cable routing? 8. Is a network line available? 9. Is a telephone line available? 10. Are customer-supplied peripheral cables and LAN cables available and of the proper type? 11. Are floor tiles in good condition and properly braced? 12.
Table 1-8 Site Inspection Checklist (continued) Check either Yes or No. If No, include comment number or date. 30. Comment or Date Are air-conditioning filters installed and clean? Storage Number Area or Condition 31. Are cabinets available for tape and disc media? 32. Is shelving available for documentation? Yes No Training Number Area or Condition 33. Are personnel enrolled in the System Administrator’s Course? 34.
Figure 1-13 Delivery Survey (Part 1) DELIVERY CHECKLIST DOCK DELIVERY Yes Is dock large enough for a semitrailer? No Circle the location of the dock and give street name if different than address. North East West South STREET DELIVERY Circle the location of access door and list street name if different than address. North East West South List height and width of access door. List special permits (if required) for street delivery.
Figure 1-14 Delivery Survey (Part 2) ELEVATOR Fill in the following information if an elevator is required to move equipment. Capacity (lb or kg) Depth Height Width Height Depth Width STAIRS Please list number of flights and stairway dimensions.
2 Support and other resources Contacting HP Before you contact HP Be sure to have the following information available before you call contact HP: • Technical support registration number (if applicable) • Product serial number • Product model name and number • Product identification number • Applicable error message • Add-on boards or hardware • Third-party hardware or software • Operating system type and revision level HP contact information For the name of the nearest HP authorized reseller: • • In the U
Glossary A-B apparent power A value of power for AC circuits that is calculated as the product of root mean square (RMS) current times RMS voltage, without taking the power factor into account. ASHRAE Standard 52-76 Industry-standard term for air filtration efficiency set forth by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. ASL Above sea level. board A printed circuit assembly (PCA). Also called a card or adapter. Btu/h British thermal unit.
maximum input current The operating current of the product equal to the maximum load divided by the minimum input voltage. NEBS Network Equipment Building Standards. A set of safety guidelines. All electronic equipment has the potential to interfere with other electronic equipment. Interference can be caused by electromagnetic radiation, the grounding system, the electrical power connection, excessive heat or blocking the natural airflow, and connecting wires or cables.
watt A unit of electricity consumption representing the product of amperage and voltage. When the power requirement of a product is listed in watts, you can convert to amperes (A) by dividing the wattage by the voltage. (For example, 1,200 W divided by 120 V equals 10 A.
Index basic air-distribution systems, 22 air-distribution systems, 22 computer room considerations, 19 cooling requirements, 21 dust and pollution control, 20 electrostatic discharge prevention, 24 humidity level, 24 static protection measures, 24 equipment grounding, 15 orientation, 18 ESD prevention, 18 example installation schedule, 32 C F cell phone use, 18 circuit breaker size, 11 computer room preparation, 19 computer room safety fire protection, 10 computer system environmental elements, 18 powe
R raised floor ground system, illustrated, 15 loading, 26 specifications, 26 relative humidity, 24 row orientation, 19 S site inspection checklist, 33 sources of electrical disturbances, 11 space requirements, 27 delivery space requirements, 27 system installation guidelines, 15 data communications cables, 16 wiring connections, 16 T technical requirements based on customer, 27 telephone use, 18 W windows, 27 wiring connections, 16 46 Index
