Vulcan-Hart VHU 7 Service Manual Download Page 12

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Replace with same size and type of fuse.

Install cover.

FUSE HOLDER

Disconnect the

electrical power to the machine and
follow lockout / tagout procedures.

Note fuse wiring and disconnect.

Fig. 28

Remove fuse holder mounting screws on back
panel.

Fig. 29

Reverse procedure to install and verify proper
operation.

VHU INSULATED HUMIDIFIED CABINETS - REMOVAL AND REPLACEMENT OF PARTS

F45642 (0217)

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Summary of Contents for VHU 7

Page 1: ...to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Vulcan Service Technician The reproduction transfer sale or o...

Page 2: ...PARTS 6 TOP COVER 6 COMPARTMENT FAN 6 HEATING ELEMENT 6 CONTROLLER BOARD TEMPERATURE HUMIDITY 8 SENSOR BOARD TEMPERATURE HUMIDITY 9 DOOR ASSEMBLY 10 DOOR GASKET 11 DOOR LATCH MAGNETIC 11 FUSE 11 FUSE...

Page 3: ...ohms per volt Meter leads must also be rated at CAT III 600V 3 Clamp on type amp meter with minimum of NFPA 70E CAT III 600V UL CSA TUV listed 4 Temperature tester thermocouple type 5 ESD Electrostati...

Page 4: ...de cabinet at the top of the cavity toward the front Fig 1 3 Dry off sensor and wires Fig 2 4 Disconnect sensor wire harness plugs and dry out any moisture in connectors 5 Plug sensor wire connectors...

Page 5: ...Heating Elements Model Wattage Voltage Resistance VHU7 VHU18 2000 Optional 120 6 57 7 66 VHU INSULATED HUMIDIFIED CABINETS SERVICE PROCEDURES AND ADJUSTMENTS Page 5 of 16 F45642 0217...

Page 6: ...ical power to the machine and follow lockout tagout procedures 1 Remove upper pans and pan supports for clearance to access fan 2 Loosen fan mounting screws Fig 5 3 Slide fan 1 Fig 5 to access power c...

Page 7: ...Fig 8 7 Reverse procedure to install and check for proper operation Air Element 1 Remove pans and tray slides 2 Loosen rail guide support screws 3 Remove rail guides Fig 9 4 Remove bottom screws from...

Page 8: ...l and check for proper operation CONTROLLER BOARD TEMPERATURE HUMIDITY Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove temperature and humidity adjustment...

Page 9: ...et Sensor Board 1 Disconnect power supply 2 Remove sensor board cover Fig 16 3 Disconnect sensor wire plugs Fig 17 4 Remove double sided tape from cabinet surface 5 Clean cabinet surface 6 Apply doubl...

Page 10: ...Fig 22 from lower and upper door hinge Fig 22 Remain in control of door when removing hinges 2 Remove door hinge inside mounting screws from lower door hinge first Fig 23 3 Remove door hinge inside m...

Page 11: ...p press gasket retaining lip into channel on door assembly while moving toward middle 5 Repeat each side to complete gasket installation 6 Check door for proper operation DOOR LATCH MAGNETIC 1 Open do...

Page 12: ...hine and follow lockout tagout procedures 1 Remove TOP COVER 2 Note fuse wiring and disconnect Fig 28 3 Remove fuse holder mounting screws on back panel Fig 29 4 Reverse procedure to install and verif...

Page 13: ...ELECTRICAL OPERATION COMPONENT LOCATIONS Fig 30 VHU INSULATED HUMIDIFIED CABINETS ELECTRICAL OPERATION Page 13 of 16 F45642 0217...

Page 14: ...Internal red light indicates ON SPST Compartment Fan Circulates air inside the cabinet Moisture resistant with metal fan blades Sensor Board Senses temperature and humidity inside the cabinet and tra...

Page 15: ...board determines whether K1 relay will be energized to power element 1 dry air or K3 relay will be energized to power element 2 humid air NOTE When temperature or humidity settings are changed after...

Page 16: ...ion 3 Temperature controller needs calibrating or malfunction Fan not operating 1 Temperature controller not supplying power to fan malfunction 2 Fan wiring not connected or malfunction 3 Fan not circ...