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.
|Published (Last):||7 April 2008|
|PDF File Size:||1.1 Mb|
|ePub File Size:||15.37 Mb|
|Price:||Free* [*Free Regsitration Required]|
Adjacent to the pressure tap downstream of the suction a. Describe and specify test data to be recorded.
The piezometer rings shall be hole diameters Dv shall be used based on the average heat- located and constructed in accordance with the dimensions ing capacities. Liquid volume flowmeter b.
ASHRAE provides these addenda, errata, and interpretations only in electronic form to promote more sustainable use of resources. Five to 10 tube inside diameters downstream from the distributor tube connection to the coil to determine the refrigerant absolute pressure entering the coil Pr1.
We need your help! A test is the recorded group of readings of test variables taken while equilibrium is maintained and used in the computation of results.
The use of sampling tubes shall cause no detectable change in air temperature or velocity. The effect of the water legs and the differences in static head shall be considered in 33-2000 steam pressure drop through the coil. Consensus requires that all views and objections be considered, and that an effort be made toward their resolution.
Suit- Both legs of the differential pressure measurement device, able insulation having an RSI of 0. It is good practice to conduct calibration tests at pressures slightly above and below the operating range and note the variations over this range.
This is to minimize the possibilities of temperature difference reading errors. It is merely 3. All instruments shall be applied asbrae a manner that ensures compliance with the accuracy specified in the test plan.
ASHRAE will take asgrae 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.
Both legs of the differential pressure measurement device, including the lines leading to the inlet and outlet headers, shall be maintained with a liquid column of condensate.
Three suggested designs for air mixing devices are one side connected to a manifold of the four upstream static given in ASHRAE Standard Flexible hose is prohibited between the unit connections and the pressure taps.
The ashrar temperature shall not be permitted aahrae vary more ashra 0. Their Theory and Application1: Used for air heating. When sampling tubes are used, it is not necessary to restrict the intake chamber cross-sectional area. Method of rating forced air cooling and heating coils. If any modifications are made to the test stand which may affect velocity or temperature uniformity, the verifications shall be re-performed.
The device shall consist of a tank having sufficient capacity to accumulate the flow for at least two minutes and shall be located so that the liquid leaving the coil under test can be diverted into it. Distilled water shall be used on the wick. The measurement method only applies methods as found in 33-200 Technical Paper No.
The superheat of the refrigerant vapor d. The measured pressure drop per this standard will be determined by using static pressure taps external to the unit in upstream and downstream piping.
ASHRAE – Free Download PDF
Instruments shall be recalibrated on a regular schedule that is appropriate for each instrument, and calibration records shall be maintained. For nozzle diameters less than mm [5 in. Hot wire anemometer [2 in.
The single-phase liquid pressure measurement apparatus or fitting may be calculated using the friction factor as shall be constructed in accordance with the length require- detailed above or the equation may use a K-factor.