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Neptune EMX 150 Electronic Mixing Valve 943030

EMX is an ASSE 1017 Listed Electronic Tempering Valve System used to control domestic hot water temperature. The EMX is designed to work in domestic hot water systems a
return line and a continuously running recirculation pump. The EMX valve should not be used in a gang shower application. Use an ASSE 1069 approved valve for those applications.

Features:

• 1 1/2” inlets and outlet
• Stainless Steel Construction
• ASSE 1017 and NSF 372 (lead free) listed
• Maximum operating pressure: 150 psi
• Controls water temperature to +/- 2°F in accordance with ASSE 1017
• Low Load algorithm keeps temperature steady in low demand periods
• Fails “last position” during power failure
• Automatic Hot/Cold water shutoff upon cold/hot water inlet supply failure
• Recommended recirculation pipe size: 1” or greater
• Programmable high temperature alarm function
• Programmable set point range between 95°F to 180°F (Default set temperature 120°F)
• Control box supplied with 4 ft. 120 VAC power cord and NEMA 4 enclosure
• Modbus communication standard
• Easy integration into BMS system
• Operating Voltage: 24 VDC
• Simple user commissioning and setup
• Displays outlet temperature
• Removeable and serviceable thermocouple probe
• Factory Assembled and Tested
• Minimum hot water supply temperature: 2°F (1°C) above set point with equal incoming pressures

Typical Installation:

Install the mixing valve below the hot water tank or heater. If this is not possible, pipe in a heat trap as shown in Figure 1 with an approximate 2' drop. Connect a tempered water return line as shown in Figure 1. This allows flow through both ports of the mixing valve during periods of no draw. If a dual temperature system is used, a separate recirculating loop and pump are required to return high temperature hot water to the water heater. See Figure 2. Install the water heater per manufacturer’s instructions.

Technical Documents

Neptune Installation & Maintenance Manual