HVAC equipment

Operating manuals Do staff members understand how the HVAC equipment is intended to operate ... 

Addition, removal, or replacement of HVAC equipment Where the original equipment has been replaced, do the newer units have the same capacity as the originals Has new equipment been properly installed and tested Where equipment has been removed, is it no longer needed ... 

Use maintenance records to inspect HVAC equipment and make sure that it is in good operating condition. Identify items of equipment that need to be repaired, adjusted, or replaced. Record control settings and operating schedules for HVAC equipment for comparison to occupancy schedules and current uses of space. 

Operate and maintain HVAC equipment-, keep all equipment and controls in proper working order and to keep interior of equipment and ductwork clean and dry. 

Equipment operating schedules Confirm that the timing of occupied and unoccupied cycles is compatible with actual occupied periods, and that the building is flushed by the ventilation system before occupants arrive. ASHRAE 62-1989 provides guidance on lead and lag times for HVAC equipment. In hot, humid climates, ventilation may be needed during long unoccupied periods to prevent mold grow th. 

Identify key individuals needed for access and information A person familiar with the HVAC systems in the building should be available to assist the investigator at any time during the onsite phase. Individuals who have complained or who are in charge of potential sources (e.g., housekeeping, non- HVAC equipment) should be aware that their information is important and should be contacted for appointments or telephone interviews if they will not be available during the onsite visit. 

Many HVAC system engineering problems focus on the operation and the control of the system. In many cases, the optimization of the system s control and operation is the objective of the simulation. Therefore, the appropriate modeling of the controllers and the selected control strategies are of crucial importance in the simulation. Once the system is correctly set up, the use of simulation tools is very helpful when dealing with such problems. Dynamic system operation is often approximated by series of quasi-steady-state operating conditions, provided that the time step of the simulation is large compared to the dynamic response time of the HVAC equipment. However, for dynamic systems and plant simulation and, most important, for the realistic simulation... 

Damper section A section of HVAC equipment containing a damper or valve. 

Fungus. simple organism that contains no chlorophyll, which may consist of one cell or of many cellular filaments called hyphae. If allowed to grow in HVAC equipment it may cause allergic reactions. 

Housing A device or enclosure that con tains any item of HVAC equipment. 

Instrumentation A sensor that either simply or automatically controls HVAC equipment or that records some particular function of the plant operation, such as temperature, pressure, or flow. 

Water vapor is generated indoors due to human metabolism, cooking and taking showers, unvented combustion activities and by humidifiers water and moisture leaks through roof or building envelope improperly maintained HVAC equipment... 

The shedding list includes all electrical devices in the plant that can be turned off for some limited time period. At the top of the list are the low-priority users (sump pumps, HVAC equipment, etc.), whereas higher up on the list, there can be secondary users (pumps and other equipment that can be operated at partial load levels or cycled on and off). 

Make allowance for electric motors not included in equipment list, such as fans, HVAC equipment, motor-operated valves and doors, etc., using 480 V. 

Brandemuehll evaluated the ability of unitary equipment to maintain adequate space humidity levels. The evaluation involved the dehumidification requirements in different buildings and at different climates. He analyzed the building load characteristics to identify and describe key factors that affect humidity control in commercial building applications. The results indicated that ventilation loads dominated the dehumidification characteristics of most commercial buildings and dramatically affect the SHR of the system loads. He concluded that, in most cases, the dehumidification requirements were beyond the capability of conventional unitary HVAC equipment. ... 

Modine Metals Vehicles, HVAC equipment, industrial equipment, refrigeration systems, fuel cells and electronics... 

Hydro Aluminum Aluminum HVAC equipment, refrigeration systems... 

A successful chemical sensor must be able to tolerate a reasonable operational temperature range, probably at minimum 10-40° C for indoor applications where the sensor may be placed in utility rooms with HVAC equipment. Considering a wider scope of potential applications for both indoor and outdoor environments with various potential placements, the temperature range could be as wide as —25—65°C. Across whatever temperature range is employed, the sensor should be able to tolerate the humidities expected, for example 20% RH to 70% RH for less challenging indoor applications and 5% RH to 100% RH for the complete range of conditions across all climates. 

HVAC EQUIPMENT - Apparatus or equipment used in heating, ventilating, and air conditioning. 

RESONANT VIBRATION - Everything has a natural frequency. This frequency is effected by two properties Mass and Stiffness. This "natural frequency" is the cause of many vibration problems in HVAC equipment. If you strike an object (say a tuning fork or a bell) it will continue to vibrate at its natural frequency until damping extinguishes the vibration. 

Heating. Ventiiation. and Air Conditioning i(HVAC) Systems. The design professionai should evaluate building HVAC systems and sub-systems and select major HVAC equipment components based on a consideration of health and safety requirements, initiai costs, operating costs, and maintenance costs,... 

Applications and uses automotive electrical applications, water pump impellers, HVAC equipment, solar heating systems, packaging, and circuit breakers. 

Swab down suspected ductwork with antimicrobial solution Remove materials in locations found infested with microbial growth where cleaning is not possible Clean carpeting and furniture that has microbial growth Make sure drains in HVAC equipment are working... 

Controls vary with the problem. Chlorination and other chemical treatments commonly used for water-based problems in HVAC equipment may not be effective. Designated smoking areas have not always removed contaminants from the general office environment. When contaminants build up as a result of an inadequate supply of outdoor air, likely sources of contaminants for sick building syndrome are the HVAC systems. When located, the specific causes require removal at the source. 

Installation of HVAC equipment does not fall within the categories listed, i.e., leading-edge work, precast concrete erection, or residential construction. Therefore, the warning line at the six-foot option does not apply. 

Install an EMS that provides the foUowing control strategies for HVAC equipment scheduling control, setback control, optimum start/stop, air handling unit discharge temperature reset, air side economizer control. 

The diesel generator building houses the two diesel generators and their associated HVAC equipment. 

The building also contains the diesel generator s associated HVAC equipment. 

Various radwaste processing and packaging operations A waste accumulation room A packaged waste storage room A monitor tanks room A truck staging area An HVAC equipment room An eleetrieal and meehanical equipment room Plant Arrangement Considerations... 

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