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106308-05 - 3/23
APEX Installation, Operating, & Service Instructions
Blower / Gas Train Components
Key
No.
Description
Part Number
APX425C APX525C
2A Replacement Blower Kit (includes blower, blower outlet gasket and hardware) 104999-01 104999-02
2B Blower Outlet Gasket 106209-01 109208-01
2C
Blower Inlet Assembly (includes gas orifice, injector flange, inlet shroud (425C
only), swirl plate, blower adapter plate, and mounting hardware)
110037-01 110038-01
2D
Blower Inlet Replacement Kit (includes swirl plate, blower adapter plate, and
mounting hardware)
104620-04 104620-05
2E Replacement Gas Valve Kit (includes one gas valve and o-rings) 105004-01 105004-04
2F Gas Valve 90° Flange Kit (includes one 90° flange, o-ring, and hardware) N/A 108103-01
2G Gas Valve Wire Harness (includes harness with plug and M4 x 30 mm screw) 108880-01
2H
Gas Valve Straight Flange Kit (includes one straight flange, o-ring, and
hardware)
N/A 108104-01
2J Gas Line Rubber Grommet 3/4 in. NPT: 108889-01
2K Gas Shutoff Valve 3/4 in. NPT: 101615-01
2L Air Proving Switch 109108-01 109113-01
2M
Air Proving Switch Tubing, silicone, 5/16 in. ID x 0.07 in. Wall Thickness x 18 in.
long
109116-01
13 Service Parts (continued)
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