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Engineering Specifications Customized CSI format engineering are available through your local INTECH 21 representative. The following sample specification can be used for reference. Scope Furnish and install ___ Heating Cable Control and Monitoring Systems (HCCM-2100™) as manufactured by Intech 21, Inc. Glen Cove, NY. Each HCCM-2100™ System shall be provided to control and monitor ___ individual heating zones (total number of branches), and ___ individual heating circuits (total number of feeders).  Standarts and Codes Applicable sections of the following codes and standards shall apply to these specifications. The latest edition date of a code or standard in force at the time of installation shall apply. Institute of Electrical and Electronics Engineers (IEEE) National Electrical Manufacturers Association (NEMA)  National Electrical Code (NEC) System Function Each heater cable shall be individually controlled by an end of line temperature sensing device. The thermocouples or RTDs shall be located on each pipe at the furthest end of each heating circuit from the power connection point, and also at the intermediate locations, as shown on the Contract Drawings. Failure of a temperature sensor shall be indicated at the system monitor panel identifying the heating circuit zone number, and also initiate the common alarm local indication and remote output.  Mechanical thermostats shall not be accepted as equal. Individual temperature controllers requiring additional wiring to the temperature sensors shall not be accepted as equal. Each heater cable including all tees shall be directly monitored for continuity of all heater cable bus wires by use of an end of line remote terminal. Indirect cable monitoring by current and / or ground fault shall not be accepted as equal to the direct end of line bus wire continuity monitoring. The addressable system shall be capable of identifying the continuity status of each leg individually. All monitoring and temperature sensing shall be provided without additional wiring other than power supply to the heater cable. The use of any additional noise filtering and / or isolation equipment for the system shall not be acceptable.  Description of Operation The control system shall energize each heater cable when the pipe temperature drops to __ degrees F. The system shall indicate an alarm condition when the pipe temperature drops to __ degrees F with the heater energized. The system shall de-energize the cable when the pipe temperature reaches __ Deg F. The control system shall be fail-safe. A failure of the temperature sensor shall result in energizing the heater cable, and initiating the alarm. All heat tracing shall be controlled by a common panel assembly, as indicated on contract drawing. Each heat-traced pipeline shall have a separate control group installed within a common enclosure. The monitor panel shall be a microprocessor based control system interfaced with the heater cable contactors. The use of the electromechanical components for the supervisory functions shall not be considered equal to the system specified. The monitor panel shall be located as indicated on the Contract Drawings. The panel shall operate at ___ VAC. The enclosures shall be provided with a laminated system guide that shall define which monitor channel refers to each pipe location. Upon initiation the system shall stay energized for a maximum of five minutes to run self-diagnostic of the entire heat tracing system, including the heating cable, power wiring, field connections and splices, end of line remote terminals, temperature sensors, and associated components of the control and monitoring system. Based on the temperature of the pipe, the system shall determine the rate of the temperature drop, and initiate temperature monitoring procedure to energize the cable at the temperature set point. The timing of the monitoring procedure shall be self-adjustable between, and shall automatically vary based on the pipe temperature.  System Indicators and Alarms The system shall be capable of monitoring the cable integrity and temperature of the pipe, and perform self-diagnostics over 24-hour period, throughout the entire year. The cable integrity checking shall provide for energy conserving operation of the heating cable. Each panel shall have LED indication for:  Power on. Common alarm. Each heater cable or branch shall have discrete LED indication of: Continuity fault. Heater on. Low temperature. Temperature sensor failure. The system shall provide common alarm NEMA 4X (red) alarm light on the face of the control enclosure and dry contact output to the central management system. The system shall have provisions for future communication interface. Control Panel All enclosures shall be NEMA type __ with back panel, reversible hinge and latchless access. The enclosure shall have a laminated as-built wiring diagram furnished and installed by the Contractor. The enclosure shall be grounded to the nearest structural steel. The terminal blocks shall have a __ Amps ratings and hardware for panel mounting. Jumpers shall be provided where required. No. __ wire shall be used for circuit interconnections and shall be provided with suitable identification. Contactors shall be rated for __ A inductive load, as indicated on contract drawing.  Field Tests Wiring shall be installed so that when completed, the system will be free from shorts, crosses or grounds. All electrical feeders and other wire and cable prior to being connected as requested by the Engineer shall be subject to an insulation resistance test using a "megger" with the D.C. voltages indicated below applied between the connected system and ground. The monitored heating cable circuits shall be tested with the remote terminal units connected during the insulation resistance tests using a "megger" at 2500 Volts DC.