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2-Way Solenoid Valves Basic Terms and Technical Information Selection Criteria Series 82 Operating principles Directly actuated: The magnetic field of the solenoid coil forces a movement of the plunger and thus causes the opening of the valve seat. Servo actuated: The magnetic field of the solenoid coil is only utilized for the opening of the pilot valve seat. The necessary energy to actuate the piston or diaphragm of the main valve seat is provided by the refrigerant flow and results in a certain pressure drop. Minimum pressure drop Directly actuated solenoid valves do not require a minimum pressure drop for proper operation. Servo operated solenoid valves require a minimum pressure drop of approximately 0.05 bar to remain fully open. In case of insufficent refrigerant flow this value will not be reached and the solenoid valve may close unintentionally. These closures may lead to malfunctions and oscillations in the refrigeration circuit. Improper sizing of solenoid valves (i.e. use of excessively large solenoid valves) is the main cause of this effect. This is particularly important in capacity controlled refrigeration circuits. Selection Guide for Solenoid Valves 110 RB 200 RB 240 RA 540 RA M36 8/9/12/16T9 16T11/20 8/9/12/16 20 2-Way + + + + + + 3-Way + Normally Closed (NC) + + + + Therefore the decisive factor for proper solenoid valve sizing is the respective capacity of the valve and not its connection size. Formula for calculating the actual pressure drop of a solenoid valve: ∆ p1 = ∆ p2 x (Q n1 /Q n2 ) 2 ∆ p1 : Actual pressure drop ∆ p2 : Nominal pressure drop at Q n1 Q n1 : Calculated nominal capacity Q n2 : Nominal capacity of selected valve Maximum Operating Pressure Differential (MOPD) MOPD is the maximum pressure differential between inlet and outlet of the solenoid valve which permits proper opening of the valve. When used with ALCO AC solenoid coils all ALCO solenoid valves employ 25 bar MOPD. Operation in conjunction with DC solenoid coils lead to reduced MOPD values depending on valve type and size. The DS2 Chopper Plugs allow the use of 24VAC coils with 24VDC by converting the DC in an AC voltage. Please contact ALCO application engineering for additional details. Normally Open (NO) + + Min. Pressure Differential (bar) 0.00 0.05 0.05 0.05 0.05 0.05 MWP (bar) 35 35 35 31 35 28 35 Media Temp. Range (°C) -40 / +120 -40 / +120 -40 / +120 -40 / +120 -40 / +120 -40 / +120 -40 / +120 Coil Type ASC ASC ASC ASC ASC ASC ASC Catalogue Page 84 84 84 84 85 85 88 Type Code 200 RB 6 T 4 Model Seat diameter T Solder Tube connection in Series in multiples of F Flare multiple of 1 / 8 ” , i.e. 1 / 2 ” 1 /16 ”, i.e. 3 / 8 ” or nearest mm equivalent A2.5.1/0706/E
Coils ASC Type Part No. Voltage Power Input Electr. Connection Protection ASC 230V / 50Hz 801 064 ASC 120V / 50Hz 801 063 AC 8 W without plug, IP65 ASC 24V / 50Hz 801 062 see cable assemblies with plug / cable ASC 12V 801 054 assembly ASC 120V 801 050 DC 15 W ASC 230V 801 056 Note: Coils are delivered with mounting clip. Please order cable assemblies separately. Cable Assemblies for ASC Coils Other Accessories for Solenoid Valves Type Part No. Description X 11981 - 1 027 451 Service tool for 110RB, 240RA, 540RA, 3031 X 13983 -1 027 622 Mounting bracket for 240RA X 13740 -1 027 600 Clip for coil PG9 Plug 801 012 Plug according to DIN 43650 with cable gland PG 9 PG11 Plug 801 013 Plug according to DIN 43650 with cable gland PG 11 A2.5.1/0706/E Standards • ALCO ASC Coils and cable assemblies conform to Low Voltage Directive ASC ASC-N15 Type Part No. Temperature Range Cable length Wire diameter Connector Type ASC-N15 804 570 1,5m ASC-N30 804 571 -25 ..+80°C 3,0m ASC-N60 804 572 6,0m 3 x 0,75 mm 2 loose wires ASC-L15 804 573 1,5m ASC-L30 804 574 -50..+80°C 3,0m ASC-L60 804 575 6,0m Cable Assemblies with 24V DC Chopper Plug • Enables standard 24V AC Coil to be used for DC applications • Low power assumption (3W only) • No MOPD degradation DS2-N15 Type Part No. Temperature Range Cable length Wire diameter Connector Type DS2-N15 804 620 1,5m DS2-N30 DS2-N60 804 621 804 622 -25 .. +80°C 3,0m 6,0m 2 x 0,75 mm2 loose wires 83
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Alco Controls Components for the Re
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A2.5. /0706/E Electrical Control Va
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Fan Speed, Temperature and Pressure
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A2.5. /0706/E Electrical Control Va
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Electrical Control Valves Series EX
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Liquid temperature Correction Facto
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Capacity Data Application Expansion
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Application Expansion Valve and Liq
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Application Hot Gas Bypass - Nomina
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Application Suction Pressure Regula
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Application Condensing Pressure Reg
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Application hot gas flow such as he
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Application hot gas flow such as he
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A2.5.1/0706/E Electronic Controller
Page 33 and 34: Electronic Controllers with Network
Page 35 and 36: Selection Table Electronic Controll
Page 37 and 38: Universal Driver Modules Series EXD
Page 39 and 40: Accessories Type Part No. Terminal
Page 41 and 42: Coldroom Controller Series EC3 Temp
Page 43 and 44: Block Diagram EC3-33x Coldroom Cont
Page 45 and 46: Selection table TCP/IP LON Descript
Page 47 and 48: Rack and Condenser Controllers Seri
Page 49 and 50: Block Diagrams EC3-81x Dual Ciruit
Page 51 and 52: Network Accessories Description Cab
Page 53 and 54: Pressure Transmitter Series PT4 A2.
Page 55 and 56: Electronic Fan Speed Power Module F
Page 57 and 58: A2.5.1/0706/E Thermo ® -Expansion
Page 59 and 60: A2.5.1/0706/E Example Cooling capac
Page 61 and 62: TIS(E) Valve bodies - solder type m
Page 63 and 64: Capacity kW Valve Type TI..-M.... C
Page 65 and 66: Condensing Temperature R 22 Capacit
Page 67 and 68: R 407C Nominal less MOP with Standa
Page 69 and 70: A2.5.1/0706/E Available upon specia
Page 71 and 72: Liquid Correction Factor K t Temper
Page 73 and 74: Thermo ® -Expansion Valve Series Z
Page 77 and 78: Accessories A2.5.1/0706/E Available
Page 79 and 80: Accessories Description Type Part N
Page 83: A2.5.1/0706/E Solenoid Valves 81
Page 87 and 88: 2-Way Solenoid Valves Series 540 No
Page 89 and 90: 2. Liquid Application Liquid Correc
Page 91 and 92: A2.5.1/0706/E Mechanical Pressure R
Page 93 and 94: Hot Gas Bypass Regulators Series AC
Page 95 and 96: Head Pressure Control Valves Series
Page 97 and 98: Evaporator and Crankcase Pressure R
Page 99 and 100: A2.5.1/0706/E Fan Speed Controllers
Page 101 and 102: Technical Data Function Diagram A2.
Page 103 and 104: Selection Dependent on Product Comb
Page 105 and 106: A2.5.1/0706/E Pressure Controls and
Page 107 and 108: A2.5.1/0706/E Standards and Regulat
Page 109 and 110: Single Pressure Controls Series PS1
Page 111 and 112: Dual Pressure Controls PS2 TÜV / E
Page 113 and 114: Pressure Controls Series PS3 / Stan
Page 115 and 116: Differential Pressure Controls Seri
Page 117 and 118: Function of contacts A2.5.1/0706/E
Page 119 and 120: Type Part No. Adjustment Range Lowe
Page 121 and 122: A2.5.1/0706/E System Protectors, Mo
Page 123 and 124: Bi-flow Filter Driers Series BFK he
Page 125 and 126: Nominal Operating Conditions Nomina
Page 127 and 128: Connections Type Part Connection A2
Page 129 and 130: Filter-Drier Shells With Quick-Cap
Page 131 and 132: Correction Tables for Filter Driers
Page 133 and 134: Suction Line Filters and Filter Dri
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BTAS - Water and Acid Adsorption Ca
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Moisture Liquid Indicators Series A
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A2.5.1/0706/E Oil Management Compon
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Electronic Oil Level Management Sys
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Oil Separator Series OS A2.5.1/0706
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A2.5.1/0706/E Ball Valves, Miscella
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Ball Valves Series BVA / BVS Techni
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A2.5.1/0706/E Accessories & Spare P
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Electronic Controllers A2.5.1/0706/
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Filter Driers Indicators A2.5.1/070
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A2.5.1/0706/E Appendix 153
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Saturation Pressure Table for Refri
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Suction accumulators (continuation)
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A2.5.1/0706/E 159
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