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ELECTRIC HEATING CATALOG - Agencespl.com

ELECTRIC HEATING CATALOG - Agencespl.com

ELECTRIC HEATING CATALOG - Agencespl.com

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Models EDF & EDIFinned TubularAir Duct Heater(cont’d.)Fan Interlock Selection - UL Standard 1096requires an acceptable means of interlocking theheater with the fan as an integral part of theheater, factory installed. One of the followingmust be used.Differential Switch - The pressure switchmethod of proving air flow is the most reliable.Minimum requirements are met when the pressurein the sensing tube, <strong>com</strong>bined velocity andstatic, is greater than the switch setting.Fan Interlock Relay - A normally open relay(contactor) is wired in series with the duct heatercontrol circuit. The coil of this relay is wired to aterminal block for field connection to the fanmotor starter circuit.Fan Interlock Relay with Fan Delay Control -Delays the fan or blower motor until after theheating elements have reached a selected temperature,eliminating the initial delivery ofunwarmed air.Standard Finned TubularElements SuppliedDuct Height Duct Depth (In.)(In.) 6.5" 12" 17-1/2"6 2 3-4 5-68 3 4-6 7-910 3-4 5-8 9-1212 6 7-12 13 - 1814 6-7 8-14 15 - 2116 6-8 9-16 17 - 2418 9 10-18 19 - 2720 9-10 1-20 21 - 3022 9-11 12-22 23 - 3324 12 13 - 24 25 - 3626 12-14 15 - 28 29 - 4228 15 16 - 30 31 - 4530 15 - 16 17 - 32 33 - 4832 15 - 17 18 - 34 35 - 5134 15 - 17 18 - 34 35 - 5136 18 19 - 36 37 - 5438 18 - 19 20 - 38 39 - 5740 18 - 20 21 - 40 41 - 60Heating Control Stages - In order to achievemodulating control of the heater, it is possibleto specify multiple heating steps or stages.Normally, the number of stages available dependsupon the number of finned tubes perheater. The number of finned tubes per heateris determined by the H dimension of the heater.Control Circuit Supply - Optional. Built-in factorywired control transformers are frequentlyrequired if a field source of control voltage isunavailable for meeting control circuit requirements.A <strong>com</strong>plete selection of transformers with primaryvoltages of 120, 208, 240, 277, 380, 480and 600V are available. Secondary voltages of24 and 120 Vac are available. Unless specified,the transformer primary voltage will be the sameas the heater line voltage.Power Disconnect Switch - Optional. To meetthe requirement for a disconnect switch at or insight of the heater, its controls and fuses; a builtindisconnect is available for power loads greaterthan 200 Amps. When this option is not selected,power terminal blocks will be provided (200Amps max per block).Horizontal Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC1, AJ2Horizontal Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC1, AJ1Vertical Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC1, AJ3Horizontal Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC2, AJ2Horizontal Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC2, AJ1Vertical Duct — Side terminal boxentry for type EDI & EDF heaters. Airflow as shown. Install with this arrow up.Configuration ERC2, AJ3Page 16 Form C-EH

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