Chromalox CXH-A/B Series, Installation, Operation And Maintenance Instructions

Page 1: ... 2020 Chromalox PF490CE 3 161 302421 007 August 2020 Installation Operation and Maintenance Instructions CXH A B Hazardous Location Forced Air Heater ...

Page 2: ... Table of Contents 1 Introduction 2 Safety 3 Specifications and Product Identification 4 Mechanical Installation 5 Electrical Installation 6 Operation 7 Preventative Maintenance and Repair 8 Troubleshooting 9 Warranty ...

Page 3: ... in hazard ous locations and contains enclosures with flameproof joints Un less otherwise noted do not tamper with repair or modify enclo sures or the enclosures flameproof joints If the flameproof joints threads or machined surfaces appear to be damage units must be returned to Chromalox for repair If stripped or damaged re placement fasteners used on flameproof enclosures must be pro vided by Ch...

Page 4: ...020 Chromalox 3 Specifications and Product Identification Note Performance data is based on results of controlled testing Actual performance may vary depending on application Table A Operating Performance ...

Page 5: ...rature Limitations Operating 40 C to 40 C 40 F to 104 F Storage Intermittently to 130 C 266 F 3 Specifications and Product Identification Cont Model CXH A B heaters have an EC type examination as well as IECEx and EAC certificates issued by Intertek and have been approved to the following standards EN 60079 0 2012 A11 2013 EN 60079 1 2014 IEC 60079 0 2011 Ed 6 IEC 60079 1 2007 04 Ed 6 ...

Page 6: ... 2020 Chromalox 3 Specifications and Product Identification Cont ...

Page 7: ... a perma nently mounted upright position The maximum out of plane dimensions as shown in Figure2 must not be exceeded in ei ther during operation and installation to com ply may cause nuisance tripping of over temperature cutout Theceiling or wall mounting surface and the anchoring must be sufficient to support the combined weights the heater and mounting hardware heater weights are listed in Tabl...

Page 8: ...ng or pole mounting kit be utilized Mounting Cont Figure 2 Maximum Out of Plane Dimensions These kits include brackets and heater installation hardware Refer to document PF458 for mounting kit installation CXH A B heaters are equipped with two threaded mounting points 5 8 11 UNC located on the top of the heater case that may used to be anchor the heater to an alternative mounting structure using 5...

Page 9: ...ion location listings 1 NPT Entry on top is factory equipped with a non certified conduit plug Unused conduit cable entries must be plugged with certified stopper plugs Ensure that equipment is properly grounded using designated grounding lugs Modification of cable conduit entries will void third party listings and warranty Wiring should be selected based on amperages listed in table D Use only co...

Page 10: ... 2020 Chromalox 5 Electrical Installation Cont Diagram 1 ...

Page 11: ... CXH A B 05 480 5 3 6 4 8 0 14 15 I CXH A B 07 480 7 5 3 8 8 11 0 14 15 I CXH A B 10 480 10 3 12 4 15 5 14 20 I CXH A B 15 480 15 3 18 5 23 2 10 30 I CXH A B 20 480 20 3 24 5 30 7 8 35 I CXH A B 25 480 25 3 30 9 38 7 8 40 I CXH A B 30 480 30 3 36 9 46 2 6 50 I CXH A B 35 480 35 3 42 9 53 7 4 60 I CXH A B 03 600 3 3 3 2 4 0 14 15 I CXH A B 05 600 5 3 5 6 7 0 14 15 I CXH A B 07 600 7 5 3 7 5 9 4 14 ...

Page 12: ...ps are incorporated into the design of the cabinet to limit the degree of closure Do not force the louvers beyond these stops If specified units are supplied with built in alarm pilot lamps which will energize when abnormal conditions occur Review troubleshooting section for information on addressing these situations Do not operate in ambient temperatures exceeding 40 C 104 F Manual and Automatic ...

Page 13: ... tamper with or remove thermostat terminal cover Ther mostat may only be serviced by Chromalox personnel Thermostats have a set range from 50 90 F 10 32 C To set the thermostat rotate dial to desired temperature Optional Integral Thermostat ...

Page 14: ... X 3 Check motor for smooth operation X X 4 Check enclosure covers and conduit cable con X X 5 Inspect enclosures for debris or foreign material that could potentially cause shorting X X 6 Inspect all electrical wiring and connections includ ing terminals crimps and wire insulation Feel for loose connections and look for signs of loose con nections such as discoloration of terminals or wire insula...

Page 15: ... 2020 Chromalox 8 Repair and Replacement ...

Page 16: ...uard 11 Thread motor nipple connection into conduit union and tighten 5 threads minimum Replace bolts in mo tor base and reattach fan guard to back of housing in four places Recheck blade rotation and tighten all hardware 12 Trim all motor leads extending out of the conduit to 6 lengths Strip off 3 8 of insulation at cut ends Using the motor nameplate previous notes and marked wires reconnect the ...

Page 17: ...er bolts or screws are damaged they must only be replaced with factory provided fasteners 3 When securing enclosure bolts or screws hand tighten and follow table E for proper torque spec Bolt Size Bolt Torque ft lbs Bolt Torque N M Enclosure Bolt Grade 7 16 14 UNC 2A 52 70 5 Control Enclosure SAE 8 Thermostat Enclosure 5 16 18 UNC 2A 18 24 4 SAE 7 Heating Element Terminal Housing N A N A N A N A T...

Page 18: ...crews attached to a panel plate within enclosure Once the wires are disconnected the components can be removed by loosening screws holding them to the mounting plate To remove pilot lights unscrew them from the enclosure once wires are disconnected Pilots lights are equipped with fusing Fuses must be replaced with equivalent rated models Only replace electrical components with those that are facto...

Page 19: ... 2020 Chromalox 8 Repair and Replacement Cont ...

Page 20: ...um Check for signs of vacuum loss such as leaks near relief valve If discovered contact Chromalox and arrange for service Inlet or outlet are blocked Clean unit using compressed air Heat exchanger is dirty Clean unit using compressed air Relief valve has activated Unit has overheated Contact Chromalox and arrange for service Fuse or GFI blows Short in wiring Check all wiring for loose or frayed co...

Page 21: ... 2020 Chromalox to Chromalox Inc 103 Gamma Drive Pittsburgh PA 15215 chromalox com ...