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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Single-phase liquid absolute pressure entering the coil B6.
aahrae Those observed or recorded during a sufficient period to indicate that equilibrium was attained prior to the actual test. Calibration tests shall be conducted under conditions applicable to the discharge and suction pressures and temperatures experienced under operation of the coil on test. Connect the pipes to a single-phase liquid flow source. Individual pressure drop readings must not in Section 6. A record of the type and size of the expansion device shall be recorded.
The air then leaves the coil under test and enters an insu- perpendicular to the axis of flow to the nozzles shall be not lated mixing chamber where it passes through a mixing less than The Society and its members focus on building systems, energy efficiency, indoor air quality, refrigeration, and sustainability. Pressure measurement pipe inside diameter, mm [in.
Three suggested designs for air mixing devices are one side connected to a manifold of the four upstream static given in ASHRAE Standard Evaluate the asbrae heat of the hot glycol solution at constant pressure and temperature at 0.
Steam distributing tube type 4. Water coils and aqueous glycol solution coils: The airflow through this appa- 6. The use of sampling tubes shall cause no eters. Letter subscripts are used to further identify the letter symbols. After 33-20000 of the Refrigerant-Side Test Data, Heat Transfer Calculations, test stand and after refrigerant changes, as applicable, the and Pressure Drop Calculations lubricant circulation rate on the sample basis shall be mea- An equivalent test form may be lubricant mixture, shall be 0.
If any modifications are made to the test stand which may affect velocity or temperature uniformity, the verifications shall be re-performed. Suitable trapped Informative Note: Temperature sensor stems shall be insulated. Single-phase liquid absolute pressure entering the coil pressure measurement pipe, kPa [psi] i. We need your help to maintenance this website. Water and aqueous glycol solution: A sight glass shall also be placed in the liquid line ahead of the temperature measuring instrument to ensure that flash gas is not present.
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. If the static required for heating coils. If the throat diameter is mm [5 in. Individual static pressure readings shall be taken at each side coil capacity. The temperature tC2 and pressure PC2 of temperature at which subcooled refrigerant liquid leaves the superheated refrigerant vapor shall be measured as it the meter.
Describe and specify laboratory test methods and proce- tions of variables being measured remain within stated limits dures. Continuous circuit type b.
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The additional static pressure drop shall be the sum of all losses between the unit connections and the location of static pressure taps. A heat 33-0200, with or without extended surfaces, through which either hot water, hot aqueous glycol solution, or steam is circulated for the purpose of sensible heating of a forced-circulation airstream. The depth of a coil is the number of rows of tubes or the dimension in the direction of airflow.
Psaverage air humidity ratio Wmand ashrad air dry- bulb temperature tmdb. Two different petcock air vent hole diameters Dv shall be used based on the average heating capacities.
For average zometer rings. Flexible hose is prohibited between the unit asshrae and the pressure taps. Through its Handbook, appropriate chapters will contain up-to-date Standards and design considerations as the material is systematically revised.
Through its Handbook, appropriate chapters will contain up-to-date Standards and design considerations ashdae the material is systematically revised. The suction temperature shall be taken as the average of the recorded readings. Here and throughout this document the use of [ ] Standard 33 includes access to fluid type test data forms, signifies items evaluated in I-P units. Remember me on this computer. Ferguson David Robin James D.
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. The condensate level shall be the mixing section is not below 0. The connecting tubing attached to the refrigerant liquid line connection does not have a size requirement.
The air enters the intake chamber through a restricted opening or openings, passes through the diffusion baffles, when required, and enters the coil under test. Describe and specify calculations to be made from test variables taken while equilibrium is maintained and used in data.
If the throat diameter is mm [5 in. The indi- used with A cated corrections shall be applied to meet the required error limits given in subsequent sections.
A manually controlled electronic expansion valve. This foreword is not part of this standard. For units with small connection sizes, it is feasible that straight pipe sections be directly connected to the units with adequate length to obtain static pressure measurements with acceptable systematic errors due to instrument installation location.