April 2007 / BULLETIN 30-20 3-Way Valves The right solenoid valve for any job.
Bulletin 30-20 / Page 1 Sporlan 3-Way Valves Advantages n n 3-Way Pilot eliminates costly high- to low-side leaks. “B” Type reduces total installed cost by eliminating need for normally open solenoid valve on systems requiring reclaim condenser pump out. n High capacity at minimum pressure drop. n Tight synthetic main port seating. n n Easily mounted in vertical or horizontal line to simplify piping requirements. Proven performance backed by Sporlan service, engineering and technical support.
Page 2 / Bulletin 30-20 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 General Today more and more applications are utilizing “heat reclaim” as a means of providing a supplementary or even a primary heat source. Heat reclaim can significantly lower energy costs. Heat reclaim is best described as the process of reclaiming heat that would normally be rejected by an outdoor condenser. Typically, the refrigerant is diverted to an air handler in an area that requires heat.
Bulletin 30-20 / Page 3 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Series Condenser Typical Piping Schematic Normal Condenser Reclaim Condenser 4 3 Check Valve 3-Way Heat Reclaim Valve 1 Optional Normally Open Solenoid Valve (XPM) A9 Hot Gas Bypass Regulator A8 Pressure Regulating Valve 2 Receiver Compressor DISCHARGE LIQUID SUCTION 1 2 3 4 Evaporator Figure 2 Use optional solenoid valve and piping if pump out is required and “C” model Heat Reclaim Valve is used, s
Page 4 / Bulletin 30-20 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Check Valve Parallel Condenser Typical Piping Schematic Normal Condenser Optional Normally Closed Solenoid Valve (E3S130) 2 Check Valve 5 3 To Suction 4 3-Way Heat Reclaim Valve Check Valve Reclaim Condenser 1 Optional Normally Open Solenoid Valve (XPM) A9 Hot Gas Bypass Regulator A8 Pressure Regulating Valve 3 Receiver Compressor DISCHARGE LIQUID SUCTION Figure 3 1 2 3 4 5 Evaporator Use optional s
Bulletin 30-20 / Page 5 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Operation All Sporlan’s 3-Way Heat Reclaim Valves have a pilot operated design that shifts the refrigerant flow to either the normal condenser or the reclaim condenser based on the heating requirements of the application. “B” Type Normal (Outdoor) Condenser – De-energized condenser, a normally open solenoid valve can be added to the lowest physical location of the heat reclaim coil to remove liquid.
Page 6 / Bulletin 30-20 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 the balance of pressures and spring forces could result in flow to both the reclaim and normal condenser connections. One solution is to install a check valve in the reclaim condenser line and either use a Type B valve or provide a pump out solenoid connected to the tubing between the reclaim connection of the 3-way valve and the check valve. “B” and “C” Type Reclaim (Reheat) Condenser – Energized See Figure 5.
Bulletin 30-20 / Page 7 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Evaporator Capacities — Tons Capacities are based on 100°F condensing temperature isentropic compression plus 50°F, evaporator temperature as shown plus 25°F superheat suction gas. For capacities at other conditions, use the Sporlan Selection Program or the multipliers in the correction table below. All capacity ratings are in accordance with ARI Standard No. 760-80. EVAPORATOR TEMP.
Page 8 / Bulletin 30-20 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Head Pressure Control for Reclaim Systems When employing heat reclaim on a refrigeration system, the addition of head pressure controls is important not only to maintain liquid pressure at the expansion valve inlet, but also to assure the availability of quality hot gas at the reclaim heat exchanger.
Bulletin 30-20 / Page 9 3-Way Heat Reclaim Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Data to Calculate Refrigerant to Flood Condenser and Associated Piping* — lbs. REFRIGERANT 22 134a 401A 402A 404A 407C 502 507 MINIMUM AMBIENT °F -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 -40 -20 0 20 40 60 70 EQUIVALENT LENGTH of TUBING for EACH RETURN BEND – Feet 3/8” 1/2” 5/8” .200 .
Page 10 / Bulletin 30-20 3-Way Split Condenser Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Application The split condenser valve is a relatively simple modification of the standard heat reclaim valve. Figure 7 below shows a split condenser valve. The upper seat and port of the split condenser valve opens and closes. The lower port is always open. During the normal full condenser mode, the refrigerant flow is split evenly between the two halves of the condenser.
Bulletin 30-20 / Page 11 3-Way Split Condenser Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 See Figure 9. With the pilot valve energized, high side pressure Q is prevented from entering the cavity above the piston-seat assembly. At the same time the upper pilot port is opened to suction pressure W. This opens the cavity above the piston-seat assembly to suction pressure W. The cavity below the piston is exposed to high pressure.
Page 12 / Bulletin 30-20 3-Way Split Condenser Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Ordering Instructions J H When ordering complete valves, specify Valve Type, Voltage and Cycles. When ordering Valve Body ONLY, specify Valve Type. When ordering Coil Assembly ONLY, specify Coil Type, Voltage and Cycles. Example: MKC-1 120/50-60; MKC-2 120/50-60. Dimensions TYPE A 8D9B-SC B C D E F G H Optional 1/2” Conduit Boss A TYPES 8D-SC, 12D-SC, 16D-SC Figure 10 J 5.18 5.13 3.44 3.
Bulletin 30-20 / Page 13 22, 134a, 401A, 402A, 404A, 407C, 502, 507 3-Way Split Condenser Valves Reclaim Condenser Check Valve 3 4 3-Way Heat Reclaim Valve 4 3-Way Split Condenser Valve Check Valve 3 Condenser A Summer/Winter 1 Optional Normally Open Solenoid Valve (XPM) Check Valve Condenser B Summer 2 Optional Normally Closed 1 Solenoid Valve (E3S130) 2 A9 Hot Gas Bypass Regulator A8 Pressure Regulating Valve 5 Check Valve Compressor Receiver DISCHARGE LIQUID SUCTION 1 2 3 4 5 Evapo
Page 14 / Bulletin 30-20 3-Way Split Condenser Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Evaporator Capacities — Tons Capacities are based on 100°F condensing temperature isentropic compression plus 50°F, evaporator temperature as shown plus 25°F superheat suction gas. All capacity ratings are in accordance with ARI Standard No. 760-80. EVAPORATOR TEMP. °F 40 30 20 10 0 -10 -20 -30 -40 2 12D-SC 16D-SC 8D-SC 4 12D-SC 16D-SC 8D-SC 2 12D-SC 16D-SC 8D-SC 4 12D-SC 16D-SC 15.7 15.4 15.
Bulletin 30-20 / Page 15 3-Way Hot Gas Defrost Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Application Ordering Instructions 3-Way Hot Gas Defrost valves are used for gas defrost only. One or more compressors are used to provide refrigeration for multiple evaporators, both medium and low temperature. The 3-Way valves are used to control either the flow of gas off a discharge header to the various evaporators, or suction gas from the evaporators to the suction header.
Page 16 / Bulletin 30-20 3-Way Hot Gas Defrost Valves 22, 134a, 401A, 402A, 404A, 407C, 502, 507 Construction The drawings on Page 15 illustrate the construction of 3-way defrost valves. Nylatron is used as the synthetic seating material. The body and internal parts are steel and brass while the connections are copper. One of the outstanding features of this design is its take-apart construction. As a result, the valve can be cleaned or the seating material replaced in the field if necessary.
Bulletin 30-20 / Page 17 Type 180 Solenoid Pilot Control 22, 134a, 401A, 402A, 404A, 407C, 502, 507 The 180 Solenoid Pilot Control is applicable as a supplementary device to Sporlan Thermostatic Expansion Valves. It is used in place of large capacity solenoid valves for positive shut-off of liquid lines. Since only one size is necessary it costs less and is more economical to install.
Page 18 / Bulletin 30-20 Type 180 Solenoid Pilot Control Comfort Cooling Applications Sporlan thermostatic expansion valves for comfort cooling applications are generally supplied with pressure limiting charges in the thermostatic elements. These charges limit the maximum operating or opening pressure during the off-cycle, as well as during the running cycle. The table below lists these standard maximum operating pressures at an approximate 60°F saturated evaporator temperature.
Bulletin 30-20 / Page 19 Electrical Sporlan Solenoid Valves Transformer Selection for Low-Voltage Control Systems If more than one 3-way valve and/or other accessories are operated from the same transformer, then the transformer VA rating must be determined by adding the individual accessories’ VA requirements. Many systems utilize low voltage controls, requiring the use of a transformer for voltage reduction, normally to 24 volts.
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