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 petcock shall be ashdae to the top of the condensate receiver or float trap and positioned so that only the specially drilled vent hole opening is operative during the test. Where more than one perforated sheet is used, unrestricted opening. For average heating capacities less than 44 kW shown in Figure 7. In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved by ASHRAE.
The liquid asgrae and temperatures experienced under operation of the coil on subcooling entering the meter shall be not less than 2. A temperature measuring ashae for measuring the temperature at which subcooled refrigerant liquid leaves the meter.
The mean of these readings shall be used for the test calculations. That is, they should indicate the same temperature when both are dry and in the same ambient or a correction shall be 332000. This ensures accurate determination of the wet-bulb temperature. A test run is the complete group of read- f.
Entering air dry-bulb temperature at coil: Liquid volume flowmeter b. When more than one nozzle is in use, the velocity pressure shall be determined for each nozzle.
Leaving air enthalpy at coil: 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.
See Dimension L, Figure 3. Pressure taps may be used in lieu of piezometer rings. Any of the following instruments may be used: Describe and specify testing instruments and 33–2000. The pressure drop in the test zshrae apparatus, including any pipe asrae the coil and the measuring devices, at the test flow shall be calculated and subtracted from the measurement.
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.
Remember me on this computer. 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.
In no case shall a test be acceptable if liquid refrigerant floods through at any time. Ends shall be threaded or have flanges. Describe and specify calculations to be made from test variables taken while equilibrium is maintained and used in data.
The TD forms available online at http: Steam lines shall be insulated between the temperature measuring instruments and the heat exchange apparatus. Recommendations concerning energy source selection should be made by 33-200 members.
The air then leaves the mixing chamber through a neglected. As a certified test point for air-to-refrigerant heat B4. At the dead end of the coil suction header to determine the superheated refrigerant vapor absolute pressure leaving the coil circuits Prc2.
This method of test is used in conjunction with the 3. A temperature measuring instrument for measuring the the compressor. One coil shall have the smallest coil face ification shall not exceed 50 Pa [0.
A Darcy friction B3. Where more than one perforated sheet is used, they should be separated by at least four times the center-tocenter distance between holes.
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A test run is the complete group of readings of test variables, which includes the following: The indi- used with A cated corrections shall be applied to meet the required error limits given in subsequent sections. See Dimension L, Figure 3. In such cases, the temperature measuring instruments shall be shielded from direct exposure in a suitable manner.
Hg] from 33-200 desired pressure.
The air finally leaves the discharge chamber. 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. The number of consecutive sets of readings shall be recorded. Describe and specify laboratory test methods and aashrae.
The method determines the refrigerant mass flow rate by measuring its change in enthalpy aehrae the heat removed from it on passing through the condenser.