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Part No. Description Model Size Part No. Description Model Size
MegaTherm AP, Sizes 500,000-1,825,000MegaTherm AP, Sizes 500,000-1,825,000
MegaTherm AP, Sizes 500,000-1,825,000MegaTherm AP, Sizes 500,000-1,825,000
MegaTherm AP, Sizes 500,000-1,825,000
CROSS REFERENCE FOR NO LONGER AVAILABLE P/N’S
10364504 Inlet/Outlet Header, (Service Glassed Cast Iron)
before s/n# April 1999 - NLA ........................... use K10364504
10391304 Flange, 2-1/2" NPT Machined
(S0064400 Bronze) - NLA
10418814 Pilot Ignition Lead Assy - Spark ignition
LP & Nat - NLA ................................................ use K10418814
10529300 Complete Pilot Assy, Spark
Ignition, Nat - NLA ........................................... use K10529300
20031906 Complete Tile Assy - NLA ............................... use K20031906
20031908 Complete Tile Assy - NLA
20031909 Complete Tile Assy - NLA ............................... use K20031909
20039600 Complete Pilot Assy, Spark
Ignition, LP - NLA ............................................ use K20039600
E0013000 Flow Switch (outdoor) - NLA
E0066200 Dual Aquastat/Hi-Limit w/Manual Reset - NLA use KE0066200
E0086100 Transformer, 115V/24V - NLA........................... use R0021300
E0100900 Ignition Control, Electronic, Nat - NLA
E2033900 Ignition Control, Electronic. Spark LP/CSD-1
(100% Lockout) - NLA ..................................... use KE2033900
E2075100 Low Water CutOff - NLA..................................use RE2075100
E2218701 Pressure Switch - NLA ................................... use KE2218701
L0052300 Burner, Main - NLA .......................................... use KL0052300
V0046600 Gas Valve, Safety, 1", On/Off & 2-Stage,
Nat - NLA ........................................................ use KV0046600
V0046700 Gas Valve, Safety, 1-1/4", On/Off & 2-Stage,
Nat - NLA
V0051200 Gas Valve, Combination/Operating,
1", On/Off & 2-Stage, Nat - NLA .................... use KV0051200
V0051300 Gas Valve, Combination/Operating,
1-1/4", On/Off & 2-Stage, Nat - NLA
W0034300 Pilot Burner (Honeywell) Spark Ignition,
Nat - NLA ........................................................ use KW0034300
W0034500 Pilot Burner (Johnson) Spark Ignition,
Nat - NLA ........................................................ use KW0034500