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| | | ESR Electronic Stepper Regulator | | |
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| | | The ESR is a direct driven suction regulator that uses a linear actuating bi-polar stepper motor to move the piston. The stepper motor is actuated by a voltage pulse to energize each of the motor phases and move the piston in discrete .001 inch increments. When used as an EPR in individual supermarket display cases, the ESR, along with appropriate control electronics, provides state-of-the-art temperature control within less than ± 1°F of the desired setpoint temperature. The ESR is compatible with many control electronics widely available in the market today. Applications for the ESR include case control, line-up and rack mounted control, as well as transportation applications on refrigerated trucks, trailers and containers. ESRs are also acceptable for use as hot gas bypass and head pressure, liquid hold-back valves. An eSr may NOT be used as an expansion device. (see ESVB information for this application) Features • No external sealing o-rings • Removable external connector • Excellent repeatability • Corrosion resistant design Options • Connections: 7/8 ODF (ESR 12) 1-3/8 ODF (ESR 20) Nomenclature example: ESR- 12 T7 S/T 12V NC | | |
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| | | Note: This device requires a "driver" device such as a CPC "Einstein". | | |
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| | | Specifications | | |
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| | | Operating temperatures -Ambient: -Refrigerant: Maximum working pressure: Linear actuating bi-polar stepper motor Direct drive with no hysteresis Step rate: Steps full travel: Voltage tolerance: .001 inch of linear travel per step Resistance (each phase): Two motors available. | | |
| | | -40°F to + 150°F -40°F to + 280°F 500 psi | | |
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| | | 50 ± 10 steps per second 800 steps + 10% and -15% of rated voltage 29 ohms ± 10% (12V) or 116 ohms ± 10% (24V) 24V or 12V alternating square wave (see stepper sequence table on next page) MP 604 CE | | |
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| | | | | | | | | | | | | | | ESR | 12 | 1_ | 7 | S/T | 12V | NC | | | | Electric | Port Diameter | Connection | Connection Size | Body | 12 Volt1 | No | | | | Stepper | In 1/16' increments | T = ODF | In 1/8' increments | Configuration | 24 Volt | External | | | | Regulator | ESR-12 = 3/4' Dia. | | 7 = 7/8' | S/T = Straight-Thru | Bipolar | Connector | | | | | ESR-20 = 1 1/4' Dia. | | 11 = 1 3/8' | ANG = Angle | Stepper | | | | | | | | | VLB = Valve Less | Motor | | | | | | | | | Body | | | | | | | | | | | | | | | | |
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| | | Nominal* Capacity in Tons (kW) | | |
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| | | | | | | | | | | | | Valve | R-134a | R-22 | R-507/R-404A | | | | ESR - 12 | 5.3 (18.3) | 5.8 (20.1) | 5.7 (19.9) | | | | ESR - 20 | 10.3 (35.7) | 13.4 (46.3) | 11.0 (38.3) | | | | | | | | Valve | R-12 | R-407C | R-502 | | | | ESR - 12 | 4.8 (17.0) | 7.9 (28.0) | 7.8 (27.6) | | | | ESR - 20 | 9.5 (33.6) | 15.1 (53.5) | 15.1 (53.5) | | | | | | | | | | | | |
| | | • UL/CUL file number: • TUV Bauart Mark Type Approval Ordering Information | |
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| | | | | | | | | | PCN | Description | | | | 064773 | ESR 12 T 7 S/T 12V NC | | | | 064774 | ESR 12 T 7 S/T 24V NC | | | | 062566 | ESR 20 T 11 S/T 12V NC | | | | 062750 | ESR 20 T 11 S/T 24V NC | | | | 062093 | ESR External Molded Connector 5' | | | | 062094 | ESR External Molded Connector 22' | | | | | | | | | |
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| | | All capacities shown are at 40°F Evaporator Temperature and 2 psi pressure drop across the ESR, with the ESR full open 800 steps. *For capacities at other evaporator temperatures and pressure drops, see extended capacity tables. Contact applications engineering for sizing and selection of ESRs in hot gas or head pressure control applications. | | |
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| | | Emerson Climate Technologies | | 185 | | |
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