This instruction manual discusses a variety of structures and the gear (components or assemblies) they include, and describes beneficial properties and modifications. this knowledge is helping process designers and operators in picking out and utilizing apparatus. This version contains a new bankruptcy 18, Variable-Refrigerant-Flow structures, which describes those structures, their elements, and acceptable criteria intimately, and incorporates a method layout instance and demanding counsel on bills, controls, and safeguard. This guide is a reference for engineers operating in HVAC&R and for execs in allied fields. ASHRAE, based in 1894, is a world association of a few 50,000 people. ASHRAE fulfills its challenge of advancing heating, air flow, air con, and refrigeration to serve humanity and advertise a sustainable global via learn, criteria writing, publishing, and carrying on with schooling.
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Reviewing ASHRAE Guideline 4 and Standard 15 with the owner can provide insight to the development of a maintenance plan. If maintenance is outsourced as required, extensive access may not be as high a priority. In some cases, regulatory and code access may be the only determining factors. , water, electricity) in locations reasonably accessible to equipment operators Adequate lines of sight to view thermometers, pressure gages, etc. Structural steel elements for major maintenance rigging of equipment Typical operator maintenance functions include cleaning of condensers, evaporators, and boiler tubes.
7 Space for chillers, pumps, and towers should not only include installation footprints but should also account for adequate clearance to perform routine and major maintenance. Generally, 4 ft service clearance (or the equipment manufacturer’s minimum required clearance, whichever is greater) around equipment for operator maintenance and service is sufficient. For chillers, one end of the chiller barrels should be provided with free space the length of the evaporator and condenser barrels, to allow for tube pull clearance.
This is particularly apparent in critical operations facilities in areas susceptible to hurricanes or tornadoes. Most building codes require that measures such as anchors and bracing be applied to the HVAC system. Refer to the local authority responsible for requirements, and to Chapter 55 of the 201 1 ASHRAEHandbook-HVAC Applicationsfor design guidance. SPACE CONSIDERATIONS In the very early phases of building design, architects, owners, and space planners often ask the engineer to estimate how much building space will be needed for mechanical equipment.
2012 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition) by ASHRAE