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Part No. Description Model Size
Part No. Description Model Size
MegaTherm Model MTMegaTherm Model MT
MegaTherm Model MTMegaTherm Model MT
MegaTherm Model MT
Old style AP before April 1999, New style after April 1999
Sizes 500,000 - 1,825,000 BTU/h
GAS SYSTEM
BURNER TRAYS
See listing in MegaTherm HH, PH, VW, PW and IW for common components.
10525901 Gas Manifold Weldment
(single inlet) ..................................both .. 500 ..........................
10525902 Gas Manifold Weldment
(single inlet) ..................................both .. 600 ..........................
10525903 Gas Manifold Weldment
(single inlet) ..................................both .. 715 ..........................
10525904 Gas Manifold Weldment
(single inlet) ..................................both .. 850 ..........................
10525905 Gas Manifold Weldment
(single inlet) ..................................both .. 1010........................
10525906 Gas Manifold Weldment
(single inlet) ..................................both .. 1200........................
10525907 Gas Manifold Weldment
(single inlet) ..................................both .. 1430........................
10525908 Gas Manifold Weldment
(single inlet) ..................................both .. 1670........................
10525909 Gas Manifold Weldment
(single inlet) ..................................both .. 1825........................
RL0052300 Burner, Main 10 Pack ...................both ....................................
10529501 Pilot Bracket/Burner Weldment
(Johnson) ......................................old.......................................
10529502 Pilot Bracket/Burner Weldment
(Honeywell) ...................................both ....................................
R10529300 Pilot Burner IID, Nat 500-1825
Honeywell, 4-Stage ......................both ....................................
R20039600 Pilot Burner Assy IID LP
Honeywell, 4-Stage ......................both ....................................
10547002 Complete Pilot Assy
Standing Pilot, LP .........................both ....................................
10547001 Complete Pilot Assy
Standing Pilot, Nat........................both ....................................
W0035800 Pilot Burner (Honeywell)
Standing Pilot, Nat........................both ....................................
W0034400 Pilot Burner (Honeywell)
Standing Pilot, LP .........................both ....................................
RW0034300 Pilot Burner (Honeywell) Spark Ignition
Nat ................................................both ....................................
W2001500 Pilot Burner (Honeywell) Spark Ignition
LP.................................................. both ....................................
RW0034500 Pilot Burner Nat Spark Johnson...both ....................................
W0034600 Pilot Burner (Johnson) Standing
Pilot LP .........................................both ....................................
W0036500 Thermocouple (Standing Pilot).....both ....................................
10418815 Pilot Sensor Lead Assy - Std Pilot/
Nat gas .........................................both ....................................
10418816 Pilot Sensor Lead Assy - Std Pilot/LP
Spark Ign / LP & Nat.....................both ....................................
R10418814 Pilot Ignition Lead Assy - Spark Ign ..........................................
L0050700 Orifice, Nat Gas, 0-2000 ft ...........both ....................................
L0032600 Orifice, Nat Gas, 2001-5000 ft .....both ....................................
L0050200 Orifice, Nat Gas, 5001-6000 ft .....both ....................................
L0050300 Orifice, Nat Gas, 6001-7000 ft .....both ....................................
L0050400 Orifice, Nat Gas, 7001-10000 ft ...both ....................................
L0032900 Orifice, LP Gas, 0-4000 ft.............both ....................................
L0032800 Orifice, LP Gas, 4001-8000 ft.......both ....................................
L0032700 Orifice, LP Gas, 8001-10000 ft ....both ....................................
V0004200 Gas Valve, Manual, 1", Nat
LP 1010-1200 ...............................both .. 500-715 ..................
V0004300 Gas Valve, Manual, 1-1/4", Nat
LP 1430-1825 ...............................both .. 850-1825 ................
V0004800 Gas Valve, Manual, 3/4", LP ........both .. 500-850 ..................
RV0046600 Valve Gas Auto 1x1 Nat/LP 24V ..both .. 500-850 ..................
RV0046700 Gas Valve, Safety, 1-1/4", On/Off
& 2-Stage, Nat ..............................both .. 1010-1670 ..............
V0046800 Gas Valve, Safety, 1-1/2" On/Off
& 2-Stage, Nat ..............................both .. 1825........................
V0047600 Gas Valve Combo, 1x1 Nat 24V ...............................................
RV0051200 Valve Gas Combo 1" 24V Nat
On/Off & 2-Stage ..........................both .. 500-850 ..................
RV0051300 Valve Gas Combo 1-1/4" 24V Nat
On/Off & 2-Stage ..........................both .. 1010-1430 ..............
V0051400 Gas Valve, Combination/Operating
1-1/2", On/Off & 2-Stage, Nat .....both .. 1670-1825 ..............
V0059600 Gas Valve, Combination/Operating
3/4", used on 4-Stage, Nat ...........both .. 500-715 ..................
V0054800 Gas Valve, Combination/Operating
1", On/Off & 2-Stage, LP .............both .. 500-1200 ................
V0054900 Gas Valve, Combination/Operating
1-1/4", On/Off & 2-Stage, LP.......both .. 1430-1825 ..............
V0070800 Gas Valve, Combination/Operating
3/4", used on 4-Stage, LP ............both .. 500-850 ..................
W0002100 Pilot Gas Valve, Manual, Nat/LP..both .. all ..........................
W0019300 Pilot Valve, Solenoid, Nat/LP .......both .. all ..........................
W0002000 Pilot Regulator, Nat ......................both .. all ..........................
W2000200 Pilot Regulator, LP .......................both .. all ..........................
Manifold cover plate assembliles, anti rotation brackets and tie down
brackets - see listing for MegaTherm HH, PH, VW, PW and IW for common
components.
ELECTRICAL COMPONENTS
RE0100900 Controller, Ignition Module
(used prior to April 1999).............. both ....................................
RE2033900 Ignition Control (used prior to April 1999) .................................
E2305400 Ignition Control, UT 100% Lockout
After 1 Retry ..............................................................................
E2305500 Ignition Control, UT, Continuous Retry .....................................
R0021300 Transformer, 40VA, 115/24V Kit ..both ....................................
E2103900 High Limit, Manual Reset Switch .new .....................................
E2103800 Water Temp Control 60-105°F.....new .....................................
E2103600 Water Temp Sensor .....................new .....................................
RE2218701 Pressure Switch, Water .............................................................
RE0066200 Switch, Dual Aquastat ..................old.......................................
E0109200 Toggle Switch, 3-Position .............both ....................................
E0086800 Toggle Switch ...............................both ....................................
10449518 Hi Tension Lead (orange/red wire
from ignition ctrl to pilot lead) .......both .. 500-600 ..................
10449519 Hi Tension Lead (orange/red wire
from ignition ctrl to pilot lead) .......both .. 715-850 ..................
10449520 Hi Tension Lead (orange/red wire
from ignition ctrl to pilot lead) .......both .. 1010-1430 ..............