Vulcan-Hart 3-130, Service Manual

Page: 42 / 48

8 – 8
SECTION 8 - DISASSEMBLY/REASSEMBLY
8.9 COMPLETE MUFFLE REPLACEMENT
TOOLS:
Phillips head screwdriver; small flat head
screwdriver; needle nose pliers
WARNING:
Disconnect power from the wall outlet before
attempting to service the furnace!
8.9.1: Follow steps 8.1.1 - 8.1.2 of CONTROL DRAWER
REMOVAL.
8.9.2:
Disconnect muffle wires. (Refer to wiring diagram 2.8
for A-Control and 5.9 for 3 stage control.)
8.9.3: Remove 5 or 6 screws on the front top of the
furnace. Remove exhaust port
8.9.4: Open door
8.9.5: Remove two screws (one each side)
8.9.6: Pull/pry out muffle assy (with attached front
panel) from wraparound
8.9.7: Remove screw used to secure thermocouple
and pull thermocouple from muffle
8.9.8: Remove muffle retaining springs with needle
nose pliers. CAUTION: WEAR GLOVES AND EYE
PROTECTION!
8.9.9: Remove muffle assy
8.9.10:
Replace with new muffle assy by reversing
steps 8.9.1 - 8.9.9. Make sure that muffle wires pass
thru brass bushings in heatshield
A-CONTROL
100, 120V HOOK UP 230V HOOK UP
P1
TAN
P1 P6
3 - Stage
100, 120V
MUFFLE
WIRING
230V MUFFLE
WIRING
TAN W/BLK
MARK
TAN
TAN W/BLK MARK
REMOVE SCREWS
REMOVE SCREWS
REMOVE SCREW
REMOVE SPRINGS
muffle wires must pass thru
brass bushings (4 pl)