Hubbell Electric Heater Company CR manual Control Thermostat

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CONTROL THERMOSTAT

The control panel is supplied standard with a single-stage immersion thermostatic switch. As an optional any of the following may be supplied; a four-stage immersion thermostatic switch, a solid-state staging controller with thermistor, or a digital 1/16 DIN temperature controller with thermocouple. See drawing for specific details. The single-stage immersion thermostat can be adjusted through a range of 100° - 190° F. A low range, (30° - 110° F), operating thermostat is also available in the single-stage version. The four-stage immersion thermostat can be adjusted through a range of 100° - 250° F and is capable of switching four circuits. The solid-state staging controller automatically brings on-line the required number of heating steps in order to meet the hot water demand and will also operate each circuit in a circular mode to allow for equal usage of all heating circuits. The thermostat is adjustable to the desired temperature by turning the dial on the pot switch. A 1/16 DIN electronic temperature control package may be installed. A separate manufacturer’s operating manual will be supplied with all units except the single-stage immersion thermostat.

Single-Stage Immersion Thermostat

Four-Stage Immersion Thermostat

1/16 DIN Digital Display

Solid State Staging Controller

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Contents Electric Heater Company BOX Hubbell Electric Heater CompanySTRATFORD, CT Table of Contents Section Title Page Pressure Vessel Section I General Description and ConstructionVessel Connections Electrical Enclosure Flow SwitchOuter SHELL, INSULATION, and Supports Heating ElementControl Thermostat Magnetic Contactor Temperature High Limit SwitchFused LOW Voltage Transformer Stainless Steel Jacket Individually Fused ElementsLOW Water CUT-OFF OptionsBuilding Management System BMS On / Off Control SwitchAudible Alarm Built-In Circuit BreakerSpecial Customized Features Dial Temperature and Pressure GaugeSilicon Control Rectifier Piping Installation Heater PlacementFilling the Heater Electrical InstallationFinal Checks Quarterly Inspection Section III Scheduled Maintenance and OperationMaintenance and Operation FreezingSymptom Probable Cause Corrective Action / Remedy Section IV TroubleshootingPage Section V Servicing & Replacement of Parts Immersion Temperature High Limit CUT-OFF Immersion Thermostat Heating Element Relief Valve Section VI Miscellaneous Charts and Formulas Nema Enclosures Electrical Data Formulas Torque Values

CR, CR specifications

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