Vulcan-Hart 3-130, Service Manual

Page: 34 / 48

8.1 CONTROL DRAWER REMOVAL
TOOLS:
Phillips #2 screwdriver
- To gain access to the electrical components and most
other service jobs, removal of the control drawer is
required.
WARNING:
Disconnect power cord from wall outlet
before attempting to service the furnace.
8.1.1:
Remove 2 screws from bottom front of the furnace
8.1.2:
Slide control drawer towards you.
Note: A bladed screwdriver may be needed
8.2 TRIAC
TOOLS:
Phillips #2 screwdriver, 1/4" nut driver, needle nose pliers
8.2.1:
Follow steps 8.1.1 through 8.1.2 of CONTROL DRAWER
REMOVAL
8.2.2:
Disconnect wires from triac located at the rear center
of the control drawer.(use pliers to assist)
8.2.3:
Remove 2 nuts and lift triac off heatsink.
8.2.4:
Replace with new triac and note orientation.
8.2.5:
Connect wires to triac according to Wiring Diagram 2.9
(A Control) or 5.9 (3 Stage) Make sure connections are tight
8 – 1
SECTION 8 - DISASSEMBLY/REASSEMBLY - 3-STAGE
Insert screwdriver
if needed
Use Heatsink (white)
compound from old triac.