ASHRAE 33-2000 PDF
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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All instruments shall be applied in a manner that ensures compliance with the accuracy specified in the test plan. Entering air enthalpy at coil: After proceeding through another set of diffusion baffles, when required, the air enters the airflow measuring nozzles and ashraw into the discharge chamber. Pressure measurement pipe inside diameter, mm [in.
ASHRAE will take the lead with respect to dissemination of environmental information of ashfae primary interest and will seek out and disseminate information from other responsible organizations that is pertinent, as guides to updating Standards and Guidelines.
The area of the receiving chamber the nozzle tN1db. A minimum of 10 pipe inside diameters downstream of an elbow, mitered bend, or tee in the suction header to deter- a.
A minimum of 10 pipe inside diameters downstream of an 7. The piping and positioned so that only the specially drilled vent hole loss shall be determined by calibration of the measurement opening is operative during the test. Static pressure taps shall simultaneously meet all of the B5.
33-0200 the single-phase liquid pressure measurement apparatus using a material suitable for the rated pressure of the coil being tested.
Water coils and aqueous glycol solution coils: As an ongoing goal, ASHRAE will, through its Standards Committee and extensive Technical Committee structure, continue to generate up-to-date Standards and Guidelines where appropriate and adopt, recommend, and promote those new and revised Standards developed by other responsible organizations.
Aswegan Niels Bidstrup Donald M. The connecting tubing attached to the suction sion of the condenser water method for volatile refrigerant header connection shall be the same size as the coil suction flow measurement. If necessary, superheating shall be accomplished by any suitable heating means or by throttling.
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If necessary, the mixing chamber shall contain deflectors or vanes to mix the airstream to an extent that air temperatures in the plane of measurement do not vary more than 1.
It shall be calibrated in accordance with ant control device. Sight glasses located immediately before and after the the variations over this range.
The height of the coil is the dimension cooling coils. Suitable insulation having an RSI of 0.
An air leakage test shall be performed prior to initial use and at least annually thereafter, with corrective action taken if necessary. Their Theory and Application, 6th ed. If the static pressure taps are in the discharge chamber, they wshrae be located at the center of each of the four duct sides.
An oil separator located in the compressor discharge line with provision for returning oil to the crankcase, either manually or automatically. Instruments shall be recalibrated on a regular schedule that is appropriate for each instrument, and calibration records shall be maintained.
When sampling tubes are used, it is not necessary to restrict the mixing chamber cross-sectional area. Sight glasses located immediately before and after the meter to observe that vapor bubbles are not mixed with the liquid refrigerant.
The two calibrations shall not differ shall be provided: Crane Technical Paper No. To minimize possible temperature stratification, appro- located below the outlet. Single-phase liquid absolute pressure entering the coil upstream of pressure taps, mm [in. Water and aqueous glycol solution: Heat leakage shall be measured or calculated and correction of the coil capacity shall be made accordingly.
Describe and specify laboratory test methods and procedures. Connect the pipes to a c. When more heated refrigerant vapor shall be measured as it enters the than one nozzle is in use, the velocity ashrqe shall be deter- condenser, and the temperature tc2 and pressure Pc2 of the mined for each nozzle. Temperature 33-20000 stems shall be insu- coil. In dehumidifying coil tests, the manifold connections to the floor taps shall be disconnected and capped to prevent condensate from entering 332000 lines.
A condensate control valve shall be provided to regulate the condensate level. To determine the air-water vapor mixture density entering the nozzle, the air static pressure entering the nozzle pN1 shall be taken using a pressure measuring instrument open to the atmosphere with the pressure taps located either in the throat of the nozzle or downstream from the nozzle plate, together with the air dry-bulb temperature entering the nozzle tN1db.
Wall Thickness, tw, in. Please help us to share our service with your friends. Entering coil pressure measurement pipe straight length g. The effect of the water legs and the differences in 333-2000 head shall be considered in determining steam pressure drop through the coil.
Single-phase liquid pressure drop through entering coil g. The air then leaves the mixing chamber through a neglected. 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.
Single tube standard type by a difference in pressure produced by a fan or blower. In no case shall a test be acceptable if liquid refrigerant floods through at any time.
It has not been pro- either hot water, hot aqueous glycol solution, or steam is cir- cessed according to the ANSI requirements for a standard culated for the purpose of sensible heating of a forced-circu- and may contain material that has not been subject to lation airstream. Numerical subscripts are used to define conditions at the following locations: The suction temperature shall be taken as the average of the recorded readings.
No individual entering air wet-bulb temperature reading for a test shall vary by more 8. If necessary, the intake chamber shall contain diffusion baffles to ensure uniform ashrze velocity over the face of the coil and uniform temperature as required in Section 9.
The air then leaves the coil under test and enters an insulated mixing chamber where it passes through a mixing device.
Recommendations concerning energy source selection should be made by its members.