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Laars
OEM Replacement Parts
CSI CONSERVATION SYSTEMS INC 407.351.9121    CONTACT    BACK    HOME
   
Mighty Therm AP Pool Heating Boiler
Current Models: 500 MBH to 1825 MBH
Please call (407) 351-9121 or send a message for applicability, availability and pricing. Before contacting CSI, please write down your unit's complete model and serial number to help us identify the correct OEM replacement part(s) you require. An asterisk (*) indicates a part we normally keep on hand. Other OEM parts available by special order. Please read our Terms of Sale notice carefully before placing an order.
 
Installation, Operation & Maintenance Manual
 
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| Pilot System | Gas System | Electrical System | Water System | Combustion Chamber |

Pilot System
Electronic Spark Ignition 
Complete Pilot & Burner Assemblies
R10529300 Complete Pilot & Burner Assembly for Natural Gas (Honeywell)*
RW0034300
R10418814
10418816
10529502
Pilot Assembly
Pilot Ignition Lead
Pilot Sensor Lead
Dual Main Gas Burner with Pilot Bracket
R20039600 Complete Pilot & Burner Assembly for Propane Gas (Honeywell)*
W2001500
R10418814
10418816)
10529502
Pilot Assembly W2001500
Pilot Ignition Lead R10418814
Pilot Sensor Lead 10418816
Dual Main Gas Burner with Pilot Bracket 10529502
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Individual Pilot System Components
RW0034300
RW2001500
Natural Gas Pilot Assembly (Honeywell)*
Propane Gas Pilot Assembly (Honeywell)*
RW0034500 Natural Gas Pilot Assembly (Johnson Controls)*
R10418814
10418816
Pilot Ignition Lead*
Pilot Sensor Lead*
10529501
10529502
Dual Main Gas Burner with Pilot Bracket for Johnson Controls Pilots*
Dual Main Gas Burner with Pilot Bracket for Honeywell Pilots*
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Standing Pilot Ignition (Millivolt)
Complete Pilot Assemblies
10547001 Complete Pilot & Burner Assembly for Natural Gas (Honeywell)*
W0035800
W0036500
10418815
10529502
Pilot Assembly
Pilot Thermocouple
Pilot Sensor Lead
Dual Main Gas Burner with Pilot Bracket
10547002 Complete Pilot & Burner Assembly for Propane Gas (Honeywell)
W0034400
W0036500
10418816
10529502
Pilot Assembly
Pilot Thermocouple
Pilot Sensor Lead
Dual Main Gas Burner with Pilot Bracket
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Individual Pilot System Components
W0035800
W0034400
Natural Gas Pilot Assembly (Honeywell)*
Propane Gas Pilot Assembly (Honeywell)*
W0034700
W0034600
Natural Gas Pilot Assembly (Johnson Controls)*
Propane Gas Pilot Assembly (Johnson Controls)*
W0036500 Pilot Thermocouple*
10418815
10418816
Pilot Sensor Lead*
Pilot Sensor Lead*
10529501
10529502
Main Gas Burner with Pilot Bracket for Johnson Controls Pilots*
Main Gas Burner with Pilot Bracket for Honeywell Pilots*
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Gas System
Manual Shutoff Valves
Natural Gas
V0004200
V0004300
1" NPT 500-850
1¼" NPT 1010-1825
Propane Gas
V0004800
V0004200
V0004300
¾" NPT 500-850
1" NPT 1010-1200
1¼" NPT 1430-1825
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Automatic Safety Valves
Natural Gas
RV0046600
RV0046700
V0046800
On/Off or 2-Stage Firing 1" NPT 500-850
On/Off or 2-Stage Firing 1¼" NPT 1010-1670
On/Off or 2-Stage Firing ¾" NPT 1825
Propane Gas
RV0046600
RV0046700
On/Off or 2-Stage Firing 1" NPT 500-850
On/Off or 2-Stage Firing 1¼" NPT 1010-1825
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Operating Valves
Natural Gas
RV0051200
RV0051300
V0051400
On/Off or 2-Stage Firing 1" NPT 500-850
On/Off or 2-Stage Firing 1¼" NPT 1010-1430
On/Off or 2-Stage Firing 1½" NPT 1670-1825
V0059600 4-Stage Firing ¾" NPT 500-715 
Propane Gas
V0054800
V0054900
On/Off or 2-Stage Firing 1" NPT 500-1200
On/Off or 2-Stage Firing 1¼" NPT 1430-1825
V0070800 4-Stage Firing ¾" NPT 500-850
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Other Gas Controls
W0019300 Electric Pilot Shutoff Valve (Natural or Propane Gas)
W0002000
W2000200
Pilot Gas Regulator (Natural Gas)
Pilot Gas Regulator (Propane Gas)
W0002100 Manual Pilot Gas Valve (Natural or Propane Gas)
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Complete Burner Tray Assemblies
Complete factory-assembled burner trays include all burners, complete pilot assembly, gas burner manifold, gas orifices, anti-rotation bracket, burner tie down brackets and burner tray sheet metal weldment.
Spark Ignition with On/Off or 2-Stage Firing
Natural Gas Propane Gas
10550601
10550602
10550603
10550604
10550605
10550606
10550607
10550608
10550609
10526201
10526202
10526203
10526204
10526205
10526206
10526207
10526208
10526209
Complete Burner Tray 500
Complete Burner Tray 600
Complete Burner Tray 715
Complete Burner Tray 850
Complete Burner Tray 1010
Complete Burner Tray 1200
Complete Burner Tray 1430
Complete Burner Tray 1670
Complete Burner Tray 1825 
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Standing Pilot with On/Off or 2-Stage Firing
Natural Gas Propane Gas
20097401
20097402
20097403
20097404
20097405
20097406
20097407
20097408
20097409
10550201
10550202
10550203
10550204
10550205
10550206
10550207
10550208
10550209
Complete Burner Tray 500
Complete Burner Tray 600
Complete Burner Tray 715
Complete Burner Tray 850
Complete Burner Tray 1010
Complete Burner Tray 1200
Complete Burner Tray 1430
Complete Burner Tray 1670
Complete Burner Tray 1825 
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Burner Tray Components
Gas Orifices
L0050700
L0032900
Natural Gas Orifice (0-2000 feet)
Propane Gas Orifice (0-2000 feet) 
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Main Gas Burners
L0052300
RL0052300
Main Gas Burner
Main Gas Burner (Package of 10)
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Burner Tray Weldment
Sheet Metal Only
BR550601
BR550602
BR550603
BR550604
BR550605
BR550606
BR550607
BR550608
BR550609
Burner Tray Weldment (Sheet Metal Only) 500 
Burner Tray Weldment (Sheet Metal Only) 600
Burner Tray Weldment (Sheet Metal Only) 715
Burner Tray Weldment (Sheet Metal Only) 850
Burner Tray Weldment (Sheet Metal Only) 1010
Burner Tray Weldment (Sheet Metal Only) 1200
Burner Tray Weldment (Sheet Metal Only) 1430
Burner Tray Weldment (Sheet Metal Only) 1670
Burner Tray Weldment (Sheet Metal Only) 1825 
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Electrical System
Electronic Ignition Controls & Leads
For units with serial numbers beginning with C02F04752 and later:
E2305400
E2305500
Electronic Ignition Control with Continuous Retry (Natural Gas)*
Electronic Ignition Control with 100% Lock Out (Natural/Propane/CSD-1)*
For units with serial numbers up to C02F0475 and before:
RE0100900
RE2033900
Electronic Ignition Control with Continuous Retry (Natural Gas)*
Electronic Ignition Control with 100% Lockout (Natural/Propane/CSD-1)*
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Ignition Control Leads
10449518
10449519
10449520
10449521
High-Tension Lead Assembly 500-600*
High-Tension Lead Assembly 715-850*
High-Tension Lead Assembly 1010-1430*
High-Tension Lead Assembly 1670-1825*
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Temperature Controls
E2103800
E2103600
E2074000
Water Temperature Control 100°F to 240°F*
Water Temperature Sensor with Lead*
Water Temperature Sensor Immersion Well ½" NPT*
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High-Limit Switches
E2103900
RE0066200
High-Limit Switch with Manual Reset*
Dual Aquastat/High-Limit Switch with Manual Reset*
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Immersion Wells
E0025900
E0026400
RE2058300
Non-Plated Temperature Control Immersion Well*
Nickel-Plated Temperature Control Immersion Well
Stainless Steel Temperature Control Immersion Well*
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Other Electrical Controls
RE2218701 Water Pressure Switch*
E0023300
E0023500
High Gas Pressure Switch with Manual Reset*
Low Gas Pressure Switch with Manual Reset*
RE2075100 Low Water Fuel Cut-Off with Manual Reset*
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Energy Management Monitor (EM2)
20601500 EM2 Pump Control*
E0098300
E2077700
E0109200
Pump Relay*
Time Delay Relay*
3-Position Toggle Switch*
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Miscellaneous Electrical Components
E0086100
E0086800
Transformer*
On/Off Power Switch*
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Water System
Heat Exchanger Tube Assemblies
Factory-assembled ASME code compliant heat exchanger tube assemblies include tubes, headers and heat exchanger baffles.
Copper Tube Assembly with Glassed Cast Iron Headers
Standard tube assembly for normal (chemically balanced) water applications.
Indoor Outdoor
BR534701
BR534702
BR534703
BR534704
BR534705
BR534706
BR534707
BR534708
BR534709

BR665901
BR665902
BR665903
BR665904
BR665905
BR665906
BR665907
BR665908
BR665909

Copper/Cast Iron Tube Assembly 500
Copper/Cast Iron Tube Assembly 600
Copper/Cast Iron Tube Assembly 715
Copper/Cast Iron Tube Assembly 850
Copper/Cast Iron Tube Assembly 1010
Copper/Cast Iron Tube Assembly 1200
Copper/Cast Iron Tube Assembly 1430
Copper/Cast Iron Tube Assembly 1670
Copper/Cast Iron Tube Assembly 1825
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CuproNickel (CuNi) Tube Assembly with Glassed Cast-Iron Headers
Heavy duty tube assembly for chemically corrosive or soft water (under 7.5 grains hardness) applications or when hard water pumping creates higher tube velocities.
Indoor Outdoor
BR098401
BR098402
BR098403
BR098404
BR098405
BR098406
BR098407
BR098408
BR098409
BR001001
BR001002
BR001003
BR001004
BR001005
BR001006
BR001007
BR001008
BR001009
CuNi Tube Assembly 500
CuNi Tube Assembly 600
CuNi Tube Assembly 715
CuNi Tube Assembly 850
CuNi Tube Assembly 1010
CuNi Tube Assembly 1200
CuNi Tube Assembly 1430
CuNi Tube Assembly 1670
CuNi Tube Assembly 1825
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Cupronickel (CuNi) Tube Assembly with Bronze Headers
Heavy duty non-ferrous tube assembly for saltwater applications. Also ideal for other highly demanding systems with chemically corrosive or hard water.
Indoor Outdoor
BR553701
BR553702
BR553703
BR553704
BR553705
BR553706
BR553707
BR553708
BR553709
BR670401
BR670402
BR670403
BR670404
BR670405
BR670406
BR670407
BR670408
BR670409
CuNi/Bronze Tube Assembly 500
CuNi/Bronze Tube Assembly 600
CuNi/Bronze Tube Assembly 715
CuNi/Bronze Tube Assembly 850
CuNi/Bronze Tube Assembly 1010
CuNi/Bronze Tube Assembly 1200
CuNi/Bronze Tube Assembly 1430
CuNi/Bronze Tube Assembly 1670
CuNi/Bronze Tube Assembly 1825 
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Copper Tube Assembly with Bronze Headers
Standard non-ferrous tube assembly with heavy duty bronze headers.
Indoor Outdoor
BR542901
BR542902
BR542903
BR542904
BR542905
BR542906
BR542907
BR542908
BR542909
BR001101
BR001102
BR001103
BR001104
BR001105
BR001106
BR001107
BR001108
BR001109
Copper/Bronze Tube Assembly 500
Copper/Bronze Tube Assembly 600
Copper/Bronze Tube Assembly 715
Copper/Bronze Tube Assembly 850
Copper/Bronze Tube Assembly 1010
Copper/Bronze Tube Assembly 1200
Copper/Bronze Tube Assembly 1430
Copper/Bronze Tube Assembly 1670
Copper/Bronze Tube Assembly 1825 
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Heat Exchanger Baffles
10534301-09
10534601-08
20020101-09
10667701-08
Heat Exchanger Baffle (Front/Rear Indoor)
Heat Exchanger Baffle (8-Tube Indoor)
Heat Exchanger Baffle (Front/Rear Outdoor)
Heat Exchanger Baffle (8-Tube Outdoor)
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Headers, Flanges & Gaskets
10364300
10364500
10364504
Cast Iron Return Header
Cast Iron Inlet/Outlet Header
Cast Iron Inlet/Outlet Header (Service) (pre-1999 units)
10364301
10364501
10364505
Heavy Duty Bronze Return Header
Heavy Duty Bronze Inlet/Outlet Header
Heavy Duty Bronze Inlet/Outlet Header (Service) (pre-1999 units)
10391303
20130002
Cast Iron Flange 2½" NPT
Cast Iron Flange Adapter Tee 2½" NPT
10391304
20150303
Heavy Duty Bronze Flange 2½" NPT
Heavy Duty Bronze Flange Adapter Tee 2½" NPT
S0063700
S0095100
Flange Gasket*
Header Gasket*
F0023100
F2003000
F0011400
Flange Bolt 2¼"
Flange Bolt 4½"
Plain Steel Washer ½"
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Pump Adapters, Housings & Gaskets
10364200
10261501
Cast Iron Water Pump Adapter
Cast Iron Water Pump Housing*
10364201
10483301
Heavy Duty Bronze Water Pump Adapter
Heavy Duty Bronze Water Pump Housing
A0021400
S0024600
Water Pump Housing Gasket*
Water Pump Adapter Gasket*
10338400 Diffuser Baffle
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Miscellaneous Water System Components & Parts
A0063300
A0063500
125 PSI Pressure Relief Valve ¾" 500-715*
125 PSI Pressure Relief Valve ¾" 850-1825*
A0079000 Temperature & Pressure Gauge 40°F-250°F 0-200 PSI*
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Pumps & Pump Components
Bell & Gossett
RA2001800  1/2HP Water Pump with 4½" Brass Impeller*
A0058300 4½" Brass Impeller*
Armstrong
A2010304
A2010305
4½" Nylon Impeller 500-1670
5¾" Nylon Impeller 1825
A2010100
A2010200
A2010500
Bearing Module Assembly*
Seal Kit*
Pump Coupler Assembly*
20050100 Pump Cover Assembly
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Combustion Chamber
Complete Refractoyr Tile Replacement Kits
20031901
20031902
20031903
20031904
20031905
R20031906
20031907
R20031908
R20031909
Complete Tile Assembly 500
Complete Tile Assembly 600
Complete Tile Assembly 715
Complete Tile Assembly 850
Complete Tile Assembly 1010
Complete Tile Assembly 1200
Complete Tile Assembly 1430
Complete Tile Assembly 1670
Complete Tile Assembly 1825
Contact CSI or the manufacturer for ordering information on individual refractory tiles, heat shields, support assemblies, and tile covers.
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Please call (407) 351-9121 or send a message for applicability, availability and pricing. Before contacting CSI, please write down your unit's complete model and serial number to help us identify the correct OEM replacement part(s) you require. An asterisk (*) indicates a part we normally keep on hand. Other OEM parts available by special order. Please read our Terms of Sale notice carefully before placing an order.
 
Installation, Operation & Maintenance Manual
 
Return to the Parts Menu
Specifications subject to change without notice.
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All other trademarks, logos and copyrights are the property of their respective owners.
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