Operations Manual, Section 4, STEP , Applicants shall submit the following documentation to. AHRI: •. Coil physical data per ASHRAE 33 (refer to Section );. ASHRAE Methods Of Testing Forced Circulation Air Cooling And Air Heating Coils. Be notified when this Standard is updated or amended – Add to. ANSI/ASHRAE Standard (Supersedes ANSI/ASHRAE Standard ) Methods of Testing Forced-Circulation Air-Cooling and Air-Heating Coils.
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The single-phase liquid pressure measurement apparatus shall be constructed in accordance with the length requirements outlined in Table B1. Here and throughout this document the use of [ ] Standard 33 includes access to fluid type test data forms, signifies items evaluated in I-P units.
The liquid lines shall be insulated at and adjacent to the temperature measuring instruments. For reprint permission, go to www. Hg] from the desired pressure. Specify standard thermodynamic properties. This ensures accurate determination of the wet-bulb temperature. The two temperature measuring instruments shall be close the calibration method, then the reading positions should be together in the airstream so as to measure the same sample of so arranged that a single temperature measuring instrument is air.
Static pressure tap construction annulus, braze joints, tubing, etc. The length of a coil is the dimension of the face of the coil in the direction of the tubes exposed to the flow of air. The steam pressure shall not available online at http: The velocity and temperature uniformity verifications shall be performed prior to initial use and at least annually thereafter, with corrective action taken if necessary.
After proceeding through another set of diffusion baffles, when required, the air enters the airflow measuring nozzles and discharges into the discharge chamber.
One method shall measure the cooling or heating capacity on the air side; the other method shall measure the cooling or heating capacity on the cooling or heating medium side.
An vary more than 1. Six to 15 tube inside diameters ahead of the liquid control device and a minimum of 10 diameters downstream from any tube fitting to determine the subcooled refrigerant liquid absolute pressure entering the liquid control device Pr0. A heat exchanger, with or without extended surfaces, through which either chilled water, chilled aqueous glycol solution, or volatile refrigerant is circulated for the purpose of total cooling sensible cooling plus latent cooling of a forced-circulation airstream.
Test Data TD Forms Steam distributing tube type 3. Suitable insulation having an RSI of 0.
Every effort is made to balance the concerned interests on all Project Committees. The connecting tubing attached to the refrigerant liquid line connection does not have a size requirement.
A forced-circulation air-cooling or air-heating coil is a coil used in an airstream whose circulation is caused by a difference in pressure produced by a fan or blower. The purpose ahrae this annex is to provide a method for ver- C2.
For noncircular inlet chambers, the hydraulic diameter, Dcis equal to four times the crosssectional area divided by the chamber perimeter. The use of sampling tubes shall pressure taps are in the discharge chamber, they shall be cause no detectable change in air temperature or velocity. Static pressure taps shall simultaneously meet all of the B5.
The differential ashhrae measurement device shall be lated. When more heated refrigerant vapor shall be measured as it enters the than one nozzle is in use, the velocity pressure shall be deter- condenser, and the temperature tc2 and pressure Pc2 of the mined for each nozzle. Ahsrae air leakage test shall be performed prior to initial d. However, energy source selection and the possible environmental impact due to the energy source and energy transportation will be considered where possible.
Single-phase liquid absolute pressure entering the coil upstream of pressure taps, mm [in. Continuous circuit type b. To minimize possible temperature stratification, appro- located below the outlet. In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied, asyrae the product has been approved by ASHRAE. Hedrick Srinivas Katipamula Rick A. This is to minimize the possibilities of temperature difference reading errors.
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Log In Sign Up. Please copy and paste this embed script to where you want to embed Embed Script. These provisions shall take into consideration the orientation of pressure taps and manifold connections. Numerous studies conclude that the deter- B5. ASHRAE will take the lead with respect to dissemination of environmental information of its primary interest and will seek out and disseminate information from other responsible organizations that is pertinent, as guides to updating Standards and Guidelines.
To this end, Coriolis mass flowmeters or similar meters that have very little refrigerant pressure drop are suggested. The depth of a coil is the number of rows of tubes or the dimension sshrae the direction of airflow.
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An oil separator located in the compressor discharge line with provision for returning oil to the crankcase, either manually or automatically. Recommendations concerning energy source selection should be made by its members. Pressure measurement pipe inside diameter, mm [in.
The sub- at least mm [12 in.