ASME A112.14.4 pdf download GREASE REMOVAL DEVICES
1.4 Definition automatic grease/oil removal device (GRD): a plumb- ing appliance that is installed in the sanitary drainage system in order to intercept free-floating fats, oils, and grease from waste water discharges. Such equipment operates on a time- or event-controlled basis and has the ability to remove the entire range of commonly available free-floating fats, oils, and grease automatically without intervention from the user except for mainte- nance. The removed material is essentially water-free, which allows for recycling of the removed product. 2 GENERAL REQUIREMENTS
2.1.1 Design Considerations. The GRD shall automatically remove fats, oils, and grease from the separation chamber to a point outside of the GRD. The removal process shall be such that the removed fats, oils, and grease shall be 95% by volume free of water when tested according to this Standard.
2.1.2 Size. The flow and grease retention of each GRD shall be tested and rated in accordance with ASME A112.14.3.
2.1.3 Inlet and Outlet Connections. The inlet and outlet connections of the GRD shall be either female pipe thread or a plain end diameter to allow hubless coupling connections. Tapered threads shall comply with ASME B1.20.1. Hubless connections shall comply with the outside dimension for the given pipe size in accordance with ASTM A888.
2.2 Installation Instructions
Each GRD shall be provided with complete installation instructions, including but not limited to the following:
(a) Flow control and/or vent requirements
(b) Separate trapping requirements
(c) Elevation and accessibility requirements
(d) Safety and health-related instructions
(e) Wiring instructions to reference national or local codes
(f) Cleanout locations
(g) Instructions that show the clearances required for maintenance, cleaning, and prevention of hazards
2.3 Maintenance and Operating Instructions
Each GRD shall be provided with service instructions, which include a trouble shooting guide as well as instructions for performing necessary servicing or ob- taining outside servicing. Units shall be provided with complete maintenance and operating instructions. 2.4 Electrical Requirements All electrical components used in the GRD shall conform to the appropriate standards listed in para. 1.3.
3.1 General The following test protocol has been established in order to demonstrate that the GRD is capable of remov- ing accumulated grease in the amount equal to 100% of its rated capacity within 24 hr and to establish that the removed grease contains no more than 5% water by volume.
3.2 Description of Test Setup
3.2.1 Test Stand
(a) The GRD to be tested shall be installed on the test stand as described in ASME A112.14.3 and in Fig. 1. The grease discharge shall be connected to or shall feed a container of sufficient size to hold 150% of the rated capacity of fats, oils, and grease from the GRD. This container shall be positioned in a location recommended by the manufacturer of the GRD in the installation instructions for the product.
(b) The GRD shall be connected to an appropriate electrical supply as described in the installation instruc- tions and as required on the electrical data plate on