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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Hg] from the desired pressure. Aswegan Niels Bidstrup Donald M. A heat exchanger, with or without extended surfaces, through which ashrxe hot water, hot aqueous glycol solution, or steam is circulated for the purpose of 333-2000 heating of a forced-circulation airstream. 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.
ASHRAE – Free Download PDF
Specify standard thermodynamic properties. This method determines the refrigerant mass flow 33-200 by calibration of the compressor under conditions identical to test conditions. Entering air dry-bulb temperature at coil: Liquid volume flowmeter b. If any modifications are made to the test stand which may affect velocity or temperature uniformity, the verifications shall be re-performed.
Distilled water shall be used on the wick. Selected Ashrxe and Guidelines are also offered in redline sshrae that indicate the changes made between the active Standard or Guideline and its previous version. To accomplish this, 33-20000 may be necessary to extend the coil tubes. The measured pressure drop per this standard will be determined by using static pressure taps external to the unit in upstream and downstream piping. Their Theory and Application1: It shall be calibrated in accordance with ant control device.
The average entering wet-bulb air temperature for a dehumidifying coil test shall not vary by more than 0. The connecting piping shall be the same size as the coil supply and return 7. In dehumidifying coil tests, the manifold connections to the floor taps shall be disconnected and capped to prevent condensate from entering these lines.
The temperatures shall be averaged to determine 33-200 average air dry-bulb temperature surrounding intake and mixing chambers t5db. Liquids used for air cooling or air heating. Harrold, Vice-Chair James D.
To determine the air-water vapor mixture den- also be measured using a grid of evenly spaced RTDs or by sity entering the nozzle, the air static 333-2000 entering the using sampling tubes in an unrestricted opening. Reindl, Chair Rita M. Describe and specify test data to be recorded. The dry-bulb ratory may choose to test only one coil for the verifica- entering air temperatures shall be measured in a grid with tion.
Recommendations concerning energy source selection should be made by its members. To this end, Coriolis mass flowmeters or similar meters that have very little refrigerant pressure drop are suggested.
Adjacent to the pressure tap downstream of the suction a. Individual static pressure readings shall be taken at each side coil capacity. The liquid line subcooling entering the meter shall be not less than 2. The entering steam shall be superheated at least 5. The depth of a coil is the number of rows of tubes or ashare dimension in the direction of airflow.
This piping loss shall be determined ing or change fin surface wettability of coils. A separator shall be located upstream of the superheater or throttling valve to remove condensate from the steam supply line. Single-phase liquid absolute pressure entering the coil B6.