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Table of Contents

Section Page

General ...............................................................................................................................3

Installation ..........................................................................................................................3

Mounting ............................................................................................................................6

Wiring ................................................................................................................................10

Operation .........................................................................................................................11

Maintenance ....................................................................................................................11

Heater Bundle Removal and Replacement ...................................................................11

Replacement Parts ..........................................................................................................12

Troubleshooting ...............................................................................................................13

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Содержание DH

Страница 1: ...1 Installation Instructions DH and DHOC Electric Duct Heaters PF503 161 562766 001 February 2015 ...

Страница 2: ...2 Table of Contents Section Page General 3 Installation 3 Mounting 6 Wiring 10 Operation 11 Maintenance 11 Heater Bundle Removal and Replacement 11 Replacement Parts 12 Troubleshooting 13 ...

Страница 3: ...mply can result in personal injury or prop erty damage ELECTRIC SHOCK HAZARD Any installation involving electric heaters must be performed by a qualified person and must be effective ly grounded in accordance with the National Electrical Code to eliminate shock hazard ELECTRIC SHOCK HAZARD Disconnect all power before installing or servicing heater Failure to do so could result in personal injury o...

Страница 4: ...ater may be consid erably larger than the ductwork and the duct area must be increased by a sheet metal transition The slope of the transformation piece on the upstream side of the equipment is limited to 30 as indicated in Fig 5 On the leaving side the slope should not be more than 45 Air Flow 30 Max 45 45 30 4 Ft Min 4 Ft Min Max Duct Heater Figure 5 6 Do not insulate control or terminal box Ref...

Страница 5: ...t install duct heater outdoors Duct heaters cannot be installed with rooftop equipment where they are exposed to the weather 4 Ft Min Air Flow Duct Heater Flexible Duct Must be suitable for 195 F Figure 8 10 Installation with dampers or filters Maintain at least 4 distance between duct heater and damper filter frames or other similar obstructions Refer to Fig 9 4 Ft Min Damper Air Flow Top of Duct...

Страница 6: ...system includes filters they must be cleaned whenever necessary in order to maintain air flow above the minimum otherwise poor temperature control and discomfort will result If air flow is poorly distributed within the duct deflector vanes must be added to provide correction The minimum air velocities shown on the nameplate are not to be considered average readings Do not add various velocities ta...

Страница 7: ... DOWNWARD direction Vertical duct with panel extended in Upward direction Horizontal duct with panel extended in RIGHT direction Bottom mount in horizontal duct with panel extended in LEFT direction Figure 12 Airflow Left Airflow Right Airflow Down Airflow Up Airflow Left Airflow Right Airflow Left Airflow Right Airflow Down Airflow Up Airflow Left Airflow Right ...

Страница 8: ...n figure 14 and a standard depth D in figure 14 If the frame does not match the specified dimensions contact a Chromalox representative 1 Measure the height and width of the heater frame and note H and D per figure 14 2 The next step is to cut out the rough opening Cut a rectangle in the duct with dimensions H x D 1 5 Remove the sheet metal See figure 14A 3 With the rough opening cut and the sheet...

Страница 9: ...gure 16 and a standard depth D in figure 16 If the frame does not match the specified dimensions contact a Chromalox representative 1 Measure the height and width of the heater frame and note H and D per figure 16 2 The next step is to cut out the rough opening Cut a rectangle in the duct with dimensions H x D 1 5 Remove the sheet metal See figure 16A 3 With the rough opening cut and the sheet met...

Страница 10: ...witch a remote disconnect must be provided see N E C 424 65 7 Any wiring that is connected to the secondary control wiring of the Duct Heater is required to be N E C class 1 see National Electric Code Article 725 Wiring Diagram The appropriate wiring diagram will be supplied with each heater Wiring Field Wire Conduit Sizing based on 125 of total heater amperage 1PH 3PH Wire Size AWG or kcmil Condu...

Страница 11: ...g 5 Disconnect all power to the duct heater before opening the duct heater s door Operating Instructions Maintenance ELECTRIC SHOCK HAZARD Disconnect all power before installing or servicing heater Failure to do so could result in personal injury or property damage Heater must be installed or serviced by a qualified person in accordance with the National Electrical Code NFPA 70 1 Periodically clea...

Страница 12: ...ment Parts Description Part Number Rating Heating Element Bank Contact sales Disconnect Switch 303472019 40 amps 303472020 60 amps 303472021 80 amps 303472022 100 amps Power Fusing Contact sales Transformer Fusing Contact sales Contactors 306110002 24 V 306110008 120 V Transformer Contact sales Air flow switch 051947001 Automatic Reset Thermal Cutout 306600007 Manual Reset Thermal Cutout 306600008...

Страница 13: ...eck for each wire for continuity Loose or unconnected internal wires Shut down the heater per the Heater Shut Down section of the In stallation Operating Manual Open the terminal box and check wire terminals for proper connection Incorrect Voltage Check the rated voltage for the heater provided on the nameplate Check supply voltage verify that it matches the nameplate Not Enough Heat Fuse s have b...

Страница 14: ...E C 424 3 b Terminals Heating Up Loose Wiring Connection Tighten wire connections on all terminals Pilot Lights don t turn on Light bulb burnt out Replace pilot light Loose Wiring Connection Check wire connections on all control circuit terminations Limited Warranty Please refer to the Chromalox limited warranty applicable to this product at http www chromalox com customer service policies termsof...

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