| Maintenance
9-60
|
330985H01
1100°C Box Furnace
Chapter 9
Heating Unit Replacement
May be irritating to skin, eyes, and respiratory tract.
May be harmful if inhaled.
May contain or form cristobalite (crystalline silica) with use at high temperature
(above 871°C (1599.8°F)) which can cause severe respiratory disease.
Possible cancer hazard based on tests with laboratory animals. Animal studies to
date are Inconclusive. No human exposure studies with this product have been
reported.
To replace the heating unit, complete the following steps (refer to Figure 9 “Heating Unit
Replacement”):
1. Remove any atmosphere piping connected to the gas inlet tube assembly (item #2 in
Figure 9).
2. Remove the two screws from the gas inlet tube assembly. Pull the gas inlet tube
assembly straight out of the furnace.
3. Remove the screws from corners of the rear panel (#1 in Figure 9).
4. Remove the rear panel to expose the heating unit assembly.
5. Remove the two screws from the exhaust vent. Pull the exhaust vent straight up and
out of the furnace.
6. Remove the six corner screws from the shell (#3 in Figure 9).
7. Lift the shell away from the base of the cabinet to expose the entire heating unit
8. Note the terminal connections of the element wires and label them for reattachment.
Loosen the terminal nuts and remove the element wires (#4 in Figure 9).
9. Remove the thermocouple head screws and slide the thermocouple out
(#5 in Figure 9).
10. Unhook the spring bands from the base of the chassis.
CAUTION :
Failure to pull the gas inlet tube assembly straight out of the furnace will
result in damage to the gas inlet tube assembly or the heating unit.
Summary of Contents for BF51728
Page 11: ...Safety Notes Chapter 1 1 10 330985H01 1100 C Box Furnace...
Page 15: ...Introduction 2 14 330985H01 1100 C Box Furnace Chapter 2...
Page 27: ...Start Up 5 26 330985H01 1100 C Box Furnace Chapter 5...
Page 63: ...Maintenance 9 62 330985H01 1100 C Box Furnace Chapter 9...
Page 69: ...Wiring Diagram 10 68 330985H01 1100 C Box Furnace Chapter 10...