Dimplex DX -233-CB Owner'S Manual Download | Manualshive

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Supplemental Instructions for

233 Series Hazardous Location Unit Heater

Heat Exchanger Removal & Replacement

This document provides supplemental instructions to assist with the replacement of
the heater core. Refer to owner’s manual for detailed installation, operation, and
maintenance instructions, as well as cautions regarding installation and operation of
explosion-proof equipment.

1.

Remove the cabinet top and (2) heat exchanger mounting bolts on the right side.

7211430100R00

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Summary of Contents for DX -233-CB

Page 1: ... Operating Temperature Code T3C 320 F 160 C or Class I Divisions 1 2 Groups C D Class II Divisions 1 2 Groups E F G Operating Temperature Code T3C 320ºF 160ºC See Data Plate for Specific Area Classification For details on the particular hazardous environments having the potential for explosion refer to Articles 500 through 516 of the National Electric Code and or Section 18 of the Canadian Electri...

Page 2: ... only be done by qualified personnel familiar with the requirements of maintaining electrical equipment in hazardous locations 10 Replacement electrical components must be obtained from the factory in order to maintain the hazardous location rating 11 The heat exchanger is a factory vacuum sealed unit Do not attempt to loosen or tighten any of the fill or drain plugs or attempt to operate the pres...

Page 3: ...ort the heater and be sufficient to keep the heater in its proper upright operating position The maximum unit weights are MODEL lbs kgs DX 233 CA 150 68 DX 233 CB 200 91 DX 233 CC 250 114 4 See figure below for minimum installation clearances 5 The heater may be suspended from overhead beams or mounted to a side wall or a 4 pipe using one of the approved mounting kits Use of non approved mounting ...

Page 4: ...n explosion proof type rated for the area classification open on temperature rise rated 250VAC 75VA inductive capacity 3 Fan Only Switch Refer to the electrical wiring diagram and follow these steps a Do not attempt to install a Fan Only switch on a standard unit heater and do not try to field modify a standard unit heater for this option The heater must have been ordered for this option to have t...

Page 5: ...ver joints to prevent an explosion Do not attempt to install gasket material of any type at these joints A light coating of anti seize compound is applied to the threads to prevent seizing 3 Annually check the tightness of all visible bolts and nuts in particular the support structure bolts and nuts Similarly check the motor mounting bolts and nuts 4 Periodically check the motor fan and heater cor...

Page 6: ...nd fan should come on and in 5 to 15 minutes reach a stable operating temperature 7 Check out and report any unusual or questionable operating characteristics such as noise vibration loss of fluid etc 8 If heater operation appears normal place the unit into normal operation D Replacing the Fan Motor and Blade The fan motor is permanently lubricated and does not require any maintenance If the fan m...

Page 7: ...y 2 Cabinet Top 3 Fan Venturi 4 Fan Blade 5 Fan Guard 6 Fan Motor 7 Motor Support Top 8 Motor Junction Box 9 Thermostat Support Bracket 10 Thermostat 11 Conduit Tee 12 Disconnect Switch Small 13 Large Disconnect Support Bkt 14 Fan Switch ITEM DESCRIPTION 15 Conduit Seal 16 Pilot Light Bottom 17 Pilot Light Top 18 Cabinet Left Side 19 High Limit Cutout 20 Cabinet Bottom 21 Cabinet Louver 22 Cabinet...

Page 8: ... Cover 61 Auxiliary Contact 62 Ground Lug 63 Transformer 64 Main Contactor 65 Transformer Fuse Fuse Block 66 Main Mounting Bridge ITEM DESCRIPTION 50 Wiring Enclosure and Cover 51 Main Contactor 52 Ground Lug 53 Transformer 54 Auxiliary Contact 55 Main Mounting Bridge FIGURE 4 ITEM DESCRIPTION 70 Switch Enclosure and Cover 71 Disconnect Switch 72 Disconnect Switch Track Dimplex North America Limit...

Page 9: ...mental instructions to assist with the replacement of the heater core Refer to owner s manual for detailed installation operation and maintenance instructions as well as cautions regarding installation and operation of explosion proof equipment 1 Remove the cabinet top and 2 heat exchanger mounting bolts on the right side 7211430100R00 ...

Page 10: ...onto its side and remove cabinet bottom heater enclosure cover and the wiring enclosure cover Also remove single heat exchanger mounting bolt on left side Wiring Enclosure Heater Enclosure Heat Exchanger Mounting Bolt ...

Page 11: ...g for the thermal cutout Loosen locknut from conduit entering enclosure Heater Wiring Grommet locknut 4 Thread conduit into wiring enclosure to disengage heater enclosure If unit has conduit union loosen union and thread conduit into wiring enclosure Conduit Union ...

Page 12: ...5 Slide heat exchanger out of the bottom of the cabinet ...

Page 13: ...6 Locate tag on heat exchanger and verify replacement core matches original ...

Page 14: ...closure mounting bolts if you are having difficulty Tighten locknut inside wiring enclosure and make sure grommet is in place 4 Reconnect heater and thermal cutout control wires Heater wires labeled T1 T2 and T3 T1 T2 only for single phase will be connected to the corresponding terminals on the contactor Control wiring attached to contactor as shown and wire nut from which original was removed See...

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