INSTALLATION INSTRUCTIONS 1/2” THERMOSTATIC VALVE AND TRIM Valve Model No's: 1-741, 1-742, 1-743, 1-744, 1-745 1-745 2001 CARNEGIE AVE, SANTA ANA CA 92705 (949) 417-5207 WWW.NEWPORTBRASS.
General Characteristics In case of instantaneous heaters, hot water flow has to at least meet flow required by heater and maintain burning. (Specified by heater manufacturer) Operating Specifications Hot water supply temperature: Maximum: 185°F (85°C). Note 1: Maximum temperature through this valve is limited by that of the hot water supply (up to a maximum of 120°F when accurately calibrated). Note 2: Minimum difference between hot and mixed temperature is 18°F (10°C).
I. Rough in Valve Installation Note: Use plumbers tape or equivalent to seal all threaded port joints. This valve is design to fit in a 2" X 4" stud wall (or thicker) installation. Use stem extension kit #20-146 (sold seperately) if valve installed is too far away from the finished wall. 1. Do not remove mud cover from valve before locating mounting surface depth in the wall. 2. Do not turn the cartridge stem - temperature settings are pre-calibrated at the factory. 3.
II. Connecting Water Supply 1. Thoroughly flush supply lines to remove any debris, metallic shavings, flux, etc. 2. Shut off water supply to valve. 3. Hot and cold water supplies MUST be connected to designated sides for proper operation of valve. 4. If solder/brazing the fitting connections, pre-assemble hot & cold adapter fittings to copper piping. Use plumbers tape or equivalent to attach adapter to appropriate inlet / outlet port. Important: All excessive heat shall be a minimum of 4” from valve. 5.
III. Installing Trim 1. Remove and discard mud cover and screws. 2. Slide sleeve over valve body with grooved notch to topside. 3. Slide cover plate with gasket over sleeve and secure with decorative collar nut.(See Fig. 4). 4. Orient and position stop ring as shown below (See Fig. 5). 5. Open shut-off valve and verify water temperature at outlet device by using a thermometer. NOTE: The safe and factory set temperature is 100°F.
IV. Maintenance and Troubleshooting The thermostatic valve has various screens that filter debris and unwanted particles that may damage the valves' cartridge and operation. Though years of use these screens may build up with impurities and limescale, restricting the flow of water through the cartridge and or check valves. The following steps describe removal and cleaning procedure. Cartridge (Reference Fig. 7) 1. Carefully remove the handle, bonnet, stop ring, cover plate and sleeve. 2.
Check valve (Reference Fig. 8 ) 1.Turn water supply to valve inlets off. 2.Tighten center screw on check valve inward until it clears bottom on check valve slot. 3. Unscrew check valve with large bladed screwdriver. 4. Remove check valve and clean per step 4 and 5 above. 5. Replace valve back into housing, unscrew center and re-close to 7 turns max. 6.Turn on water supply to valve inlets. 7. Fully open the check valve screws and inspect for leaks. 8. Reinstall trim and set temperature per section III.
TEMPLATE FOR FINISHED WALL OPENING 4-1/2” [114] 5-1/2” [140] 1:1 SCALE Fig. 9 NWP-1-742 EN-3725 Rev F 2001 CARNEGIE AVE, SANTA ANA CA 92705 (949) 417-5207 WWW.NEWPORTBRASS.
