138
106308-05 - 3/23
APEX Installation, Operating, & Service Instructions
Burner Components
Key
No.
Description
Part Number
APX425C APX525C APX625C APX725C APX825C
1N
Replacement Burner Kit (includes burner, burner gasket,
and hardware)
104988-01 104990-01 104991-01
1O
Replacement Burner Door Kit (includes door with
inner and outer seals, gaskets for sensor and igniter,
insulation, and thermostat; does not include igniter or
flame sensor)
104992-01 104993-01
1P Burner Door Insulation Kit (WARNING: Contains RCF) 105650-01 105674-01
1Q
Replacement Flame Sensor Kit (includes sensor, gasket,
and hardware)
103339-01 103310-01
1R
Replacement Igniter Kit (includes igniter, gasket, and
hardware)
103005-01 103308-01
1S
Replacement Gas/Air Duct Kit (includes duct, gaskets,
and hardware)
104994-01 106510-01 104996-01
1T Burner Gasket 107500-01 109219-01
1V Burner Door Thermostat with Manual Reset 107413-01
1W Burner Door Hex Flange Nut, M6 x 1.0 mm (6 per boiler) 101724-01
13 Service Parts (continued)
Heat Exchanger Components
Key
No.
Description
Part Number
APX425C APX525C APX625C APX725C APX825C
Replacement Heat Exchanger Assembly (includes bare
heat exchanger, supply and return water temperature
sensors, air vent valve and water gaskets)
109102-01 109103-01 109104-01 109105-01
1A Air Vent Valve 108760-01
1B Supply Water Temperature Sensor / High Limit Sensor 109202-01
1C Return Water Temperature Sensor 107503-01
1D Flue Temperature Sensor 109109-01
1F
Replacement Thermal Link and Rear Insulation Disc Kit
(includes thermal link, disc, hardware, and instructions)
104998-01
1G
Replacement Rear Insulation Disc Kit (includes disc,
hardware, and instructions)
105651-01
1H
Flue Exit Gasket Replacement Kit (includes gasket and
dielectric grease)
104501-01 104502-01
1J 4 in. Flue Collar Adapter 109203-01 N/A
1K Temperature and Pressure Gauge (not shown) 105894-01 109221-01
1L
Safety Relief Valve (not shown) 50 PSI: 109039-01 60 PSI: 109222-01
Alternate Safety Relief Valve Kit (not shown, includes safety
relief valve and temperature and pressure gauge)
80 PSI: 104200-01
100 PSI: 104201-01
1M Boiler Drain Valve, 3/4 in. NPT (not shown) 108709-01
To Next Page
Loading...
Need help?
General
