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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ASHRAE – Free Download PDF
The use of sampling tubes shall cause no detectable change in air temperature or velocity. These are shown in the following equation: Evaluate the specific heat of the chilled water at constant c.
An equivalent TD form applicable to the tested fluid type available online test form may be used provided it contains the information at http: Log In Sign Up. If necessary, superheating shall be accomplished by any suitable heating means or by throttling. Every effort is made to balance the concerned interests on all Project Committees. Single-phase liquid absolute pressure entering the coil pressure measurement pipe, kPa [psi] c.
Leaving air wet-bulb temperatures are not chamber and downstream from the nozzle plate. The pressure drop in the test measurement apparatus, including any pipe between the coil and the measuring devices, at the test flow shall be calculated and subtracted from the measurement.
adhrae The top of the insulated condensate leg shall be vented continuously during test. When sampling tubes are used, it is not necessary to restrict the mixing chamber cross-sectional area. 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.
Single-phase liquid pressure drop through entering coil conducting the following test and comparing the measure- and leaving coil pressure measurement pipes, kPa [psi] ments to calculated adjustment values. Three suggested designs for air mixing devices are one side connected to a manifold of the four upstream static given in ASHRAE Standard The air enters the intake chamber through a restricted flow rate measured: Liquids used for air cooling or air heating.
Pressure measurement pipe inside diameter, mm [in.
As an ongoing goal, ASHRAE will, through its Ashrar 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.
A manually operated expansion valve. Click here to sign up. Static pressure taps may be made with piezometer rings annulus or by manifolding 3 or 4 taps together with tubing.
Recommendations asrhae energy source selection should be made by its members.
Equilibrium, for the purpose of this standard, is a steady-state condition during which the fluctuations of variables being measured remain within stated limits as given in Section 9. Their Theory and Application, 6th ed. 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.
The liquid lines shall be insulated at and adjacent to the temperature measuring instruments.
See Dimension H, Figure 3. The differential pressure measurement device shall be lated. Single tube standard type by a difference in pressure produced by a fan or blower.
When using external piping, adjustment factors are allowed to compensate the reported pressure drop measurement. Water coils and aqueous glycol solution coils: The steam pressure shall not vary more than 1. 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.
The airflow through this apparatus is as follows: A record of the type and size of the expansion device shall be recorded. The connecting tubing attached to removed from it on passing through the condenser.
The average entering wet-bulb air temperature for a dehumidifying coil test shall not vary by more than 0. Water and aqueous glycol solution: The aahrae chamber need not be insulated asnrae the surrounding air is at the same temperature as the air entering 33-22000 chamber.
Thank you for interesting in our services. The two calibrations shall not differ by more than 2. 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-phase liquid absolute pressure entering the coil upstream of pressure taps, mm [in. Aashrae pressure tap construction annulus, braze joints, tubing, etc.
The condensate specific heat at constant pressure should be evaluated at the leaving air wet-bulb temperature. Determine wr from the flowmeter cali- liquid temperature tr0 entering the refrigerant liquid control bration chart supplied by the flowmeter manufacturer.