Burnham Apex APX399 Installation, Operating And Service Instructions page 111

Xiii. repair Parts
1Q
Key
Description
no.
1A Bare Heat Exchanger
1B Burner Head Assembly
1C Replacement Igniter Kit
1D Replacement Flame Sensor Kit
1E Replacement Partially Assembled Burner Door
1F Air Vent Valve
1G Water Temp Sensor
1H High Limit
1J Gasket, Header (All Three)
1K Gasket, Header, 1" NPT
1L Gasket, Header, 1" & 3/4" NPT
1M Gasket, Header, 1-1/2" NPT
1N Gasket, Header, 3/4" NPT
1P-1 Gas/Air Intake Duct Assembly
1P-2 Gas/Air Intake Duct Assembly
1P-3 Gas/Air Intake Duct Weldment
1Q Burner Plate Insulation (Warning: Contains RCF, Not Shown)
1R Burner Plate Inner Seal
1S Burner Plate Outer Seal
1T Burner Head
1U Burner Head Seal
1V Insulation Disc (Warning: Contains RCF)
1W Burner Door Thermostat with Manual Reset
M6x1 Hex Flange Nut (Not Shown)
M5x14 mm Pan Hd Thread Forming Screw, T25 Drive (Not Shown)
M5x10mm Pan Hd Thread Forming Screw, Phillips Drive (Not Shown)
Thermal Link Switch (Backside of Duo Heat Exchanger) (Not Shown)
Flue Exit Gasket Kit (Inside of Vent Termination of Heat Exchanger),
(Not Shown)
(continued)
1r
1S
1T
1U
1W
(Quantity) Part number
aPX399
101931-06
101933-06
103005-01
103339-01
102696-01
101725-02
N/A
N/A
101728-01
101731-06
(4) 101742-01
N/A
104501-01
1V
aPX500 aPX800
101931-07 103261-01
101933-07 103108-01
103005-02 103308-01
103310-01
104597-01
101586-01
(2) 101685-01
101653-01
N/A
N/A
N/A
101372-03
101372-01
N/A N/A
N/A 103338-01
102615-01 N/A
103610-01
101729-01
101730-01
102658-01 104584-01
101732-01
101996-02
104569-01
(6) 101724-01
N/A
(5) 102671-01
103321-01
104502-01
111