ASME A112.19.17-2010 pdf free download.Manufactured Safety Vacuum Release Systems (SVRS) forResidential and Commercial Swimming Pool, Spa, Hot Tub,and Wading Pool Suction Systems.
2.1.2 Where SVRS devices are capable of field adjustment to site-specific hydraulic conditions, the means for effecting adjustments shall be tamper resistant, so that nonqualified personnel cannot make adjustments inadvertently.
2.1.3 SVRS devices shall be designed for on-site testing.
2.1.4 SVRS devices shall activate, latch, or lock out in the vented, or safe position following a high vacuum occurrence until manually or automatically reset to its original condition without the use of special tools.
2.2 Dimensions and ToLerances for Device End Connections
2.2.1 Where the SVRS device is provided with a PVC end connection, the end connection shall conform to Tables 1 and 2 of ASTM D 2466.
2.2.2 Where the SVRS device is provided with an ABS end connection, the end connection shall conform to Tables 1 and 2 of ASTM D 2468.
2.2.3 Where the SVRS device is provided with a threaded end connection, the threaded end connection shall conform to ASME B1.20.1.
2.3 MateriaLs
2.3.1 The materials used for constructing the device shall be in conformance with NSF-50 (for components in contact with water or the environment) and UL 1081 (for electrical components).
2.3.2 When plastic materials are used, UV inhibitors shall be added to the polymer mixture in accordance with para. 38 of UL 1081.
2.4 InstaLLation, Use and Maintenance, Adjustment Instructions, and FieLd-Testing Procedures
2.4.1 Installation, use and maintenance, adjustment instructions, and field-testing procedures shall be provided with each unit.
2.4.2 Installation instructions provided with the unit shall contain the statements specified in paras. 2.4.2.1 through 2.4.2.5.
2.4.2.1 SVRS devices shall only be installed in conjunction with an ASME A112.19.8 suction outlet fitting.
2.4.2.2 A check valve shall only be used in accordance with the manufacturer’s instructions.
WARNING: The presence of a check valve used to carry the water flow within the circulation system can prolong the high vacuum present at the suction outlet. The proper use of a check valve shall be clearly described in the manufacturer’s installation Instructions.
2.4.2.3 All SVRS devices shall be factory set or field adjusted to site-specific hydraulic conditions. After installation and before bather use, the system shall be tested by simulating an entrapment event.
2.4.2.4 A ball, butterfly, or sliding gate valve shall be installed within 2 ft (0.6 m) upstream from the SVRS (between the SVRS and the protected suction outlet), or a test mat shall be used to cover the suction outlet to simulate an entrapment event. There shall be three simulated entrapment tests conducted to verify proper adjustment and operation of the device.
2.4.2.5 Where an SVRS is used, one SVRS device shall be installed for each circulating pump piped directly to the suction outlet(s) without the use of valves that could isolate the SVRS device from the suction system.
2.5 Owners ManuaL
The Owner’s Manual shall include at a minimum
(a) model designation and manufacturer.
(b) a description of device operation, including diagrams illustrating basic design.
fr) a statement confirming that the device meets the requirements of ASME A112.19.17-2010.
(d) a statement that the SVRS is designed to release body entrapment. It may mitigate evisceration (prolapse) or limb entrapment. It does not prevent hair or mechanical entrapment.
(e) SVRS devices are tested with a single functioning suction outlet.
(f) name and telephone number of an appropriate service location.
(g) methods and criteria to be used to identify malfunctions or problems.
(h) operating instructions that clearly describe proper function of the device and the operating and maintenance responsibilities of the owner and authorized service personnel.