V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-PressureRefrigerants Installation Instructions1 Refer to the QuickLIT Web site for the most up-to-date version of this document.Applications The V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants come in two types of control action: direct acting and reverse acting. V246 valves regulate water flow to control refrigerant head pressure in systems with water-cooled condensers.The V246 Series Valves are available in 3/8 in. through 2 in. sizes and have a maximum allowable water pressure of 150 psi (10.3 bar). Direct acting V246valves have an adjustable opening point in a refrigerant pressure range of 200 to 400 psi (13.8 to 27.6 bar), and reverse acting valves have a range of 135 to 300 psi (9.3 to 20.7 bar). V246 valves may be used with standard non-corrosive refrigerants. Maritime models, which have nickel copper (Monel®) internal parts, are available for applications where the coolant may be corrosive to the internal parts.Installation Install the valve vertically with the range adjustment screw on the top, and the sensing element and pressure connection line on the bottom, to allow oil and refrigerant to drain away from the valve sensing element. IMPORTANT:The V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants is intended to control coolant media flow under normal operating conditions. Where failure or malfunction of the V246valve could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the V246valve.!CAUTION: Risk of Environmental Damage.Provide proper containment for any potential release of refrigerant, solvent, or oil. Such hazardous materials can be harmful to the environment if they are released.IMPORTANT:If the V246valve is installed on equipment that contains hazardous or regulated materials such as certain refrigerants or lubricants, you must comply with all standards and regulations governing the containment and handling of those materials.IMPORTANT:After installing the V246valve, evacuate pressure connection lines to remove air, moisture, and other contaminants in a manner consistent with applicable environmental regulations and standards.IMPORTANT:Take care to prevent foreign materials such as weld slag, thread burrs, metal chips, and scale from entering the piping system. This debris can damage or severely impede the operation of the valve by embedding itself in the seats, scoring the valve, and ultimately resulting in seat leakage. If the debris becomes embedded in the seats, subsequent flushing and filtering of the piping system with the valve installed does not remedy the problem.V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure RefrigerantsInstallation InstructionsPart No. 24-7664-2713, Rev. EIssued March 21, 2013Supersedes January 18, 2013V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants Installation Instructions2Mount the valve so that the valve sensing element is above the refrigerant tap point, if possible. If it is not possible to mount the bellows of the valve above the tap point, loop the capillary above the tap point and below the bellows and then connect to the valve. Tap off of the topside of the high side line. This minimizes the effect of refrigerant oil in the capillary on valve reaction time.Do not mount the valve in any position other than vertical unless specified by the manufacturer of the equipment on which the valve is installed. Follow the manufacturer's installation instructions.The direction of water flow is indicated by an arrow on the valve body. See Figure1.Setup and AdjustmentsIf the system is located in an area with high ambient temperatures, refrigerant head pressures may remain high enough during Off cycles to prevent the valve from closing completely. In such instances, raise the opening point pressure of the valve just enough to cause the valve to stop flow to the condenser during compressor standby periods.Manually Flushing the ValveManually flush the fluid piping after installation to remove filings, chips, or other foreign material. Manual flushing does not affect valve adjustment.To flush the valve, insert screwdrivers under both sides of the valve spring guide and lift upwards. See Figure1.Pressure Connections Connect the refrigerant side of the valve to the high pressure side of the system, preferably away from the compressor as far as possible. Additional tubing may be used to make the connection if needed. Use 1/4-inch tradesize copper tubing.Follow these guidelines when making pressure connections:•Purge all tubing and lines before making pressure connections.•Use pressure tap points located on the top side of the refrigerant lines; these reduce the possibility of oil, liquids, or sediment accumulating in the pressure connection line or valve sensing element, which could cause valve malfunction.•Avoid sharp bends in the capillary tubes. Sharp bends can weaken or kink capillary tubes, which may result in refrigerant leaks or restrictions.•Allow for slack in the capillary tubes to dampen vibration. Mechanical vibration can weaken or damage the capillary tubes.•Avoid contact between the capillary tubing and sharp or abrasive objects. Vibration or rubbing of sharp or abrasive objects in contact with capillary tubes can cause leaks.•Coil and secure excess capillary tubing away from contact with sharp or abrasive objects or surfaces. Carefully loop any excess capillary tubing into smooth, circular coils (minimum 2 in. [5 cm] diameter). Securely fasten the coiled capillary tube.•Do not overtighten flare nuts on pressure connection line fittings. Overtightening flare connections may damage the threads and result in refrigerant leaks. Donot exceed 10 ftlb (14 Nm) of torque when tightening flare connections.•Avoid severe pressure pulsation at pressure tap points. Install pressure connection lines to pressure tap points away from the compressor discharge to minimize the effects of pressure pulsation from reciprocating compressors.Figure 1: Manual FlushingRange AdjustmentScrewRange SpringValve Spring GuideTopRetainerInsert screwdriversunderneath the valvespring guide.FIG:V246_un_flsh!WARNING: Risk of Personal Injury.Shut off the liquid supply and relieve pressure in the line before servicing the valve. Contents of liquid lines could be under pressure and the release of liquid under pressure may cause severe personal injury.V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants Installation Instructions 3AdjustmentsThe V246 valves are factory adjusted for the settings shown in Table1.The opening point pressure (also called the crack-open point) is the refrigerant pressure (at the valve’s sensing element) necessary to just lift the valve disc off of the valve seat and allow water to flow through the valve body. Turning the range adjustment screw changes the opening point pressure.Use a standard service valve wrench or screwdriver to adjust the opening point pressure.•Turn the range adjustment screw counterclockwise to raise the opening point pressure.•Turn the range adjustment screw clockwise to lower the opening point pressure.Use a refrigerant pressure gauge to adjust the opening point pressure. Operate the system at normal load conditions and adjust the valve’s opening point to the desired pressure. See Table1 for refrigerant pressure specifications. Torque SpecificationsTo prevent water leakage, ensure that the spring housing and sensing element screws are tightened to the torque specification in Table2. To prevent refrigerant leakage, ensure that the 1/4 in. flare pressure connection is tightened to 10 lbft (14 Nm). Repair InformationReplacement of the sensing element, internal parts, and the rubber diaphragm can be made. To obtain replacement kit instructions and details:•In North America, contact Johnson Controls® Product Sales Operations Team at 1-800-275-5676.•In Europe, contact your local sales office.Table 1: Specifications for V246 Series Valves for High-Pressure RefrigerantsValve TypeMaximum Refrigerant Pressure at Sensing ElementOpening Point Adjustment RangeFactory-Set Opening PointDirect Acting630 psi (43.4 bar)200 to 400 psi (13.8 to 27.6 bar)200 psi (13.8 bar)Reverse Acting630 psi (43.4 bar)135 to 300 psi (9.3 to 20.7 bar)165 psi (11.4 bar)Table 2: Maximum Torque Specifications, lbin. (Nm)Valve SizeSpring Housing ScrewsSensing Element ScrewsFlare Pressure Connection3/8 in.15 (1.7)15 (1.7)10 lbft (14 Nm)1/2 in.25 (2.8)25 (2.8)10 lbft (14 Nm)3/4 in.35 (4.0)35 (4.0)10 lbft (14 Nm)1 in.55 (6.2)72 (8.1)10 lbft (14 Nm)1-1/4 in.55 (6.2)72 (8.1)10 lbft (14 Nm)1-1/2 in.55 (6.2)72 (8.1)10 lbft (14 Nm)2 in.95 (10.7)95 (10.7)10 lbft (14 Nm)V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants Installation Instructions4For North American replacement kit product code numbers, see Table3. For European replacement kit product code numbers, see Table4. Table 3: North American Replacement KitsNominal Valve SizeValve TypeSeat Replacement Kit Product Code NumberDiaphragm Replacement Kit Product Code NumberSensing Element Replacement Kit Product Code Number3/8 in.CommercialSTT14A-600RDPM14A-600RSEP93A-600RMaritime/NavySTT14A-601R3/8 in. Low FlowCommercialSTT14A-603RDPM14A-600RSEP93A-600RMaritime/NavyNot Applicable1/2 in.CommercialSTT15A-602RDPM15A-602RSEP93A-601RMaritime/NavySTT15A-603R3/4 in.CommercialSTT16A-601RDPM16A-601RSEP93A-602RMaritime/NavySTT17A-613R1 in.CommercialSTT17A-609RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-611R1-1/4 in.CommercialSTT17A-610RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-612R1-1/2 in.CommercialSTT17A-610RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-612R2 in.CommercialSTT18A-620RDPM17A-601RSEP93A-604RMaritime/NavySTT18A-622RTable 4: European Replacement KitsNominal Valve SizeValve TypeSeat Replacement Kit Product Code NumberDiaphragm Replacement Kit Product Code NumberSensing Element Replacement Kit Product Code Number3/8 in.CommercialSTT002N600RDPM14A-600RSEP93A-600RMaritime/NavySTT14A-601R1/2 in.CommercialSTT003N600RDPM15A-602RSEP93A-601RMaritime/NavySTT15A-603R3/4 in.CommercialSTT004N600RDPM16A-601RSEP93A-602RMaritime/NavySTT17A-613R1 in.CommercialSTT17A-609RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-611R1-1/4 in.CommercialSTT17A-610RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-612R1-1/2 in.CommercialSTT17A-610RDPM17A-600RSEP93A-603RMaritime/NavySTT17A-612R2 in.CommercialSTT18A-620RDPM17A-601RSEP93A-604RMaritime/NavySTT18A-622RPublished in U.S.A.www.johnsoncontrols.comV246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure Refrigerants Installation Instructions 5Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.All other marks herein are the marks of their respective owners. © 2011 Johnson Controls, Inc.Building Efficiency507 E. Michigan Street, Milwaukee, WI 53202® Johnson Controls and PENN are registered trademarks of Johnson Controls, Inc. in theUnited States of America and/or other countries. All other trademarks used herein are the propertyof their respective owners. © Copyright 2013 by Johnson Controls, Inc. All rights reserved.Building Efficiency507 E. Michigan Street, Milwaukee, WI 53202Technical Specifications V246 Series 2-Way Pressure-Actuated Water-Regulating Valves for High-Pressure RefrigerantsFactory-Set Opening PointDirect Acting 200 psi (13.8 bar), Reverse Acting 165 psi (11.4 bar)Maximum Working Pressure630 psi (43.4 bar)Opening Point Adjustment RangeDirect Acting 200 to 400 psi (13.8 to 27.6 bar), Reverse Acting 135 to 300 psi (9.3 to 20.7 bar)Media150 psi (10.3 bar) Maximum,-4F to 170F (-20C to 77C) glycol/water or liquids with low freezing points that are compatible with valve materialsThe performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, contact Johnson Controls/PENN Refrigeration Technical Support at 1-800-275-5676. JohnsonControls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.Next >