ASME A112.1016 pdf download

ASME A112.1016 pdf download.Performance requirements for automatic compensating valves for individual showers and tub/shower combinations.
2 Reference publications and definitions
2.1 Reference publications
This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendmenls published thereto.
ASME/CSA (The American Society of Mechanical Engineers/Canadian Standards
Association)
ASME Al 1218.1-201 l/CSA 8125.1.11
Plumbing suppty fittings
ASSE (American Society of Sanitary Engineering)
Plumbing Dictionary Sixth Edition — 2007
2.2 Definitions
In addition to the definitions in ASME All 2.18.1/CSA 8125.1 and in the ASSE Plumbing Dictionary, the following definitions shall apply in this Standard:
Automatic compensating valve — a water-mixing valve that is supplied with hot and cold water and that provides a means of automatically maintaining the water temperature selected for an outlet. Note. Automatic compensating vl*es are used to reduce the nsk of scalding and thermal shock.
Combination pressure-balancing and thermostatic compensating valve (Type TIP) — a compensating valve that senses inlet supply hot and cold water pressures before mixing, senses the water temperature at the outlet, and compensates for pressure and thermal variations to maintain the water temperature at the outlet.
Pressure-balancing compensating valve (Type P) — a compensating valve that senses inlet supply hot and cold water pressures and compensates for variations in the inlet supply pressures to maintain the water temperature at the outlet.
Thermostatic compensating valve (Type 1) — a compensating valve that senses the water temperature at the outlet and compensates for thermal variations to maintain the water temperature at the outlet.
Initial outlet set temperature — the average of the values of the mixed temperature measured at the outlet for the lOs immediately preceding the temperature change measured at the outlet resulting Irom a pressure or temperature change.
PoInt-of-use — the final outlet of the water supply system just prior to discharge to atmosphere. Temperature limit setting -— an adjustable means to limit the maximum setting of the device towards the hot position limiting the maximum discharge temperature.
Thermal shock — a rapid change in the outlet water temperature that is felt by the user and is sufficient to produce a potentially hazardous reaction.
User — an individual who can adjust the outlet water temperature at the point of use while he or she is in contact with the outlet water.
4.5.5 Maximum torque or operating force Retest the device In accordance with Sectk i 4.4.
4.5.6 Failure criteria
During the Lest, leakage or the need to tighten the packing nut more than once shall result in a rejection of the device.
During the test specified in Section 4.5.4, any leakage shall result in the rejection of the device. During the test specified in Section 4.5.5, an operating torque or force that exceeds 120% of the requirements of Section 4.4 shall result in the rejection of the device. Accessible designs shall not exceed the requirements specified in Section 4.4.
4.6 Pressure and temperature variation test
4.6.1 Purpose
The purpose of this test is to determine if the outlet water temperature at the point.ot.use is maintained within a set temperature range.
4.6.2 1)ata gathering, all types of devices (see Figure 1)
Data shall be gathered as follows:
(a) The temperature-recording device shall be started 10 s before the step changes.
(b) Temperature measurements shall be taken at temperature sensors Ti, T2, and T3 with measuring equipment capable of detecting a 63.2% step change within 0.3 $ with a frequency rate of 20 Hz (one value every 0.05 s) for 25 ± 5 s unless otherwise specified in this Standard. See Annex A.
(c) The outlet temperature measurements at sensor T3 shall be averaged every 0.25 s.
(d) Temperature sensors Ti. T2, and T3 shall be located as follows:
(i) Temperature sensors Ti, T2, and T3, within the flow stream in Te K or Type I copper water tube.
(ii) Temperature sensors Ti and T2, within 914 mm (36 in) of the device,
(iii) Temperature sensor T3, within 914 ± i 3 mm (36 ± 0.5 in) from the outlet of the device. The outlet tube shall be the same size as the outlet connection size of the device.
Notes:
(1) For verifying the time consfx,t of the temperature-measuring equipment. see Annex A.
(2) Data can be gathered in formats wrnIa, to those drpicted An guees 8. 1 to B 5.
4.6.3 Procedure — All types of devices (see FIgure 1)
Controllers with pressure feedback ioops shall not be active during the tests, but may be used to set the test parameters.