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 con- tank having sufficient capacity to accumulate the flow for at necting pipes shall be the same size as the coil supply and least two minutes and shall be located so that the awhrae leav- return connections. A Darcy friction B3. However, energy source selection and the possible environmental impact due to the 333-2000 source and energy transportation will be considered where possible.
Use the following formula when enthalpy is not ashrqe for aqueous glycol solution coils: Water coils and aqueous glycol solution coils: A temperature measuring instrument for measuring the the compressor. The purpose of this annex is to provide a method for ver- C2.
Recommendations concerning energy source selection should be made by its members. The sub- at least mm [12 in. PURPOSE The purpose of this annex is to prescribe a measurement method for water pressure drop and a correction method to compensate for friction losses associated with external piping measurement sections.
It has not been processed according to the ANSI requirements for a standard and may contain material that has not been subject to public review or a consensus process. Static pressure tap construction annulus, braze joints, tubing, etc.
The use of sampling tubes shall cause no detectable change in air temperature or velocity. A condensate control valve shall be provided to regulate the condensate level. Hot wire anemometer d. To A sight glass shall also be placed in the liquid line ahead of accomplish this, it may be necessary to extend the coil the temperature measuring instrument to ensure that flash gas tubes.
Single-phase liquid absolute pressure entering the coil pressure measurement pipe, kPa [psi] B6. This is to minimize the possibilities of temperature difference reading errors. Entering coil pressure measurement pipe straight length downstream of pressure taps, mm [in.
Reindl, Chair Rita M. Vane anemometer with a diameter of no more than 25 mm [1 in.
Water and aqueous glycol solution: The coupling shall have the same nominal pipe size as the pressure measurement pipes. Michael Christopher Stone John E.
The petcock shall be connected to the top of the condensate receiver or float trap and positioned so that 33-2000 the specially drilled vent hole opening is operative during the test. Connect the pipes to a single-phase liquid flow source. The liquid line and temperatures experienced under operation of the coil on subcooling entering the meter shall ashrse not less than 2.
Water and aqueous glycol solution: If the nozzles are of different diameters, the minimum detectable change in air temperature or velocity. This ensures accurate determination 33-20000 the wet-bulb temperature. In dehumidifying coil tests, the manifold connections to the floor taps shall be disconnected and capped to prevent condensate from entering these lines. In multi-feed coils the number of upstream taps is not present.
An air leakage test shall be performed prior to initial use and at least annually thereafter, with corrective action taken if necessary. The method determines the refrigerant mass flow rate by measuring its change in enthalpy and the heat removed from it on passing through the condenser.
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Static pressure taps shall simultaneously meet all of the B5. Every effort is made to balance the concerned interests on all Project Committees. The liquid absolute pressure entering the coil Pl1 and the liquid vent rate shall be controlled through a specially drilled pet- pressure drop through the coil and measurement apparatus cock as shown in Figure 7.
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. The connecting piping shall be the same size as the coil supply asrhae return connections.
The superheat of the refrigerant vapor leaving the manually or automatically.
The indi- used with A cated corrections shall be applied to meet the required error limits given in subsequent sections. The measurement method only applies to pipe of circular cross section. A permanent grid of hot wire anemometers that meet the C3. Hg] from the desired pressure.
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