Hubbell CR User Manuals

Table of Contents

• ELECTRIC HEATER COMPANY

  1
• WARNING / CAUTION

  2
• TABLE OF CONTENTS

  3
  • 5
    • 5
      • GENERAL DESCRIPTION

        5
        • CONSTRUCTION

          5
          • 5
            • PRESSURE VESSEL

              5
          • OUTER SHELL, INSULATION, AND SUPPORTS

            6
          • ELECTRICAL ENCLOSURE

            6
          • A louvered control panel available in various sizes and with assorted types of handles is supplied. The standard cabinet is rated NEMA 1, but other NEMA rated enclosures are available, consult drawing for further information. A list of NEMA ratings are a

            6
          • CONTROL THERMOSTAT

            7
          • MAGNETIC CONTACTOR

            8
            • FUSED LOW VOLTAGE TRANSFORMER

              8
            • To prevent the possibility of damage to control circuits and other elements in case of electrical overloads, fuses may be supplied for each element. Two types of fuses may be used; a type NON for voltages less than 250-volt or type JJS for voltage less t

              9
            • LOW WATER CUT-OFF

              9
            • OPTIONS

              9
            • On / Off Control Switch

              10
            • A built-in non-fused On/Off disconnect switch may be supplied with the control panel to decrease the risk of injury when working with the control panel.

              10
            • Built-In Circuit Breaker

              10
            • Audible Alarm

              10
            • Status Indicating Lamp(s)

              10
            • An SCR “zero fired” power controller for 0-100% proportional control of heaters may be supplied.

              11
            • Dial Temperature and Pressure Gauge

              11
          • FINAL CHECKS

            13
• Symptom

  15