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Laars OEM Replacement Parts
CSI CONSERVATION SYSTEMS INC 407.351.9121    CONTACT    BACK    HOME
 
Mighty Therm HH PH Hydronic Heating Boiler
Current Models: 2000 MBH to 5000 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
Complete factory-assembled pilot/burner assemblies include: pilot, sensor lead, ignition lead, burner with pilot bracket and aluminum pilot tubing.
R20047801 Complete Pilot & Burner Assembly for Natural Gas (Johnson Controls)
Each Assembly Includes:
RW0034500
20052005
20052006
Q0068400
20047700		 Pilot
Pilot Sensor Lead
Pilot Ignition Lead
Aluminum Pilot Tubing
Main Gas Burner with Pilot Bracket
20047901 Complete Pilot & Burner Assembly for Propane Gas (Johnson Controls)
Each Assembly Includes:
W2001300
20052005
20052006
Q0068400
20047700		 Pilot
Pilot Sensor Lead
Pilot Ignition Lead
Aluminum Pilot Tubing
Main Gas Burner with Pilot Bracket
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Individual Pilot System Components
Pilot Assemblies
RW0034500
W2001300		 Natural Gas Pilot Assembly (Johnson Controls)*
Propane Gas Pilot Assembly (Johnson Controls)*
RW0034300 Natural Gas Pilot Assembly (Honeywell)*
Pilot Leads
20052005
20052006		 Pilot Sensor Lead with Ceramic Insulator (8.7") (Honeywell)
Pilot Ignition Lead with Ceramic Insulator (10.75") (Honeywell)
10418817
10418818		 Pilot Ignition Lead with Ceramic Insulator (23.5") (Johnson Controls)
Pilot Sensor Lead with Ceramic Insulator (24.5") (Johnson Controls)
20035405 Complete Pilot Wiring Assembly
Common Components
10546500
20016400
20047700		 Lead Insulator Bracket
Pilot Shield
Main Gas Burner with Pilot Bracket
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Standing Pilot Ignition (Millivolt)
Complete Pilot & Burner Assemblies
Complete factory-assembled pilot/burner assemblies include: pilot, thermocouple, sensor lead, burner with pilot bracket and aluminum pilot tubing.
20058202 Complete Pilot & Burner Assembly for Natural Gas (Honeywell)
Each Assembly Includes:
W0035800
W0035900
20052005
20012600		 Pilot
Pilot Thermocouple
Pilot Sensor Lead
Main Gas Burner with Pilot Bracket
20048001 Complete Pilot & Burner Assembly for Propane Gas (Johnson Controls)
Each Assembly Includes:
W0034600
W0035900
20052005
20047700		 Pilot
Pilot Thermocouple
Pilot Sensor Lead
Main Gas Burner with Pilot Bracket
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Individual Pilot System Components
Pilot Assemblies
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)*
Pilot Leads
10418818
20052005		 Pilot Sensor Lead with Ceramic Insulator (24.5")
Pilot Sensor Lead with Ceramic Insulator (8.7")
20035406 Complete Pilot Wiring Assembly
Common Components
W0035900
10546500
20047700		 Pilot Thermocouple
Lead Insulator Bracket
Main Gas Burner with Pilot Bracket
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Gas System
Manual Valves
V0001800
V0004300		 Manual Valve (Natural Gas)
Manual Valve (Propane Gas)
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Safety Valves
RV0046700
V0046800
V0046900
V2000500
V0021300
V2001300		 Automatic Safety Valve for 4-Stage Firing (Natural or Propane Gas)
Automatic Safety Valve for Motorized Modulation (Natural or Propane Gas) 
Automatic Safety Valve (Natural or Propane Gas)
Automatic Safety Valve for 2-Stage Firing
Automatic Safety Valve
Automatic Safety Valve
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Operating Valves
V0047800
V0047900
RV0051300
V0051400
V0054900
V2001000		 Combination / Operating Valve for On/Off Firing (Natural Gas)
Combination / Operating Valve for On/Off Firing (Natural Gas)
Combination / Operating Valve for 2-Stage Firing (Natural Gas)
Combination / Operating Valve for 2-Stage Firing ( Propane Gas)
Combination / Operating Valve for 2-Stage Firing ( Propane Gas)
Combination / Operating Valve for 2-Stage Firing (Natural Gas)
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Other Gas Controls
W0019300
W0002100
W0002000
W2000200		 Electric Pilot Valve (Safety Shutoff)
Manual Pilot Gas Valve (Natural/Propane Gas)
Pilot Regulator (Natural Gas)
Pilot Regulator (Propane Gas)
RW0030000 Electric Pilot Safety Switch with Manual Reset
V0026700
V0027000		 Pressure Regulator (½") (Natural Gas)
Pressure Regulator (2½") (Natural Gas)
V0048400
V0048500
V0048600		 Motorized Modulating Valve (2")
Motorized Modulating Valve (2½")
Motorized Modulating Valve (3")
V0048700
V0048800
V2000300		 Modulating Actuator (120V)
On/Off Actuator (120V)
2-Stage Actuator (120V)
V2003100
V2003200
V2003300		 Lubricated Ball Valve
Lubricated Ball Valve (1½") 
Lubricated Ball Valve (2") 
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Gas Burners & Orifices
Gas Burners
L2005800
RL2005800		 Main Gas Burner
Main Gas Burner (Package of 5)
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Orifices for Indoor Appliances
L2002200
L2006100
L2006400
L2006700
L2007000
L2007300
L2007600
L2007900		 Natural Gas Orifice #20
Natural Gas Orifice #23
Natural Gas Orifice #24
Natural Gas Orifice #26
Natural Gas Orifice #27
Natural Gas Orifice #28
Natural Gas Orifice #29
Natural Gas Orifice #30		 0-2000 Feet
2001-3000 Feet
3001-4000 Feet
4001-5000 Feet
5001-6000 Feet
6001-7000 Feet
7001-8000 Feet
8001-10000 Feet
L2011300
L2002500
L2002600
L2002700
L2002800
L2002900		 Propane Gas Orifice #35
Propane Gas Orifice #36
Propane Gas Orifice #37
Propane Gas Orifice #38
Propane Gas Orifice #39
Propane Gas Orifice #41		 0-2000 Feet
2001-4000 Feet
4001-5000 Feet
5001-7000 Feet
7001-8000 Feet
8001-10000 Feet
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Orifices for Outdoor Appliances
L2006400
L2006700
L2007000
L2007600
L2007900
L2008000		 Natural Gas Orifice #24
Natural Gas Orifice #26
Natural Gas Orifice #27
Natural Gas Orifice #28
Natural Gas Orifice #29
Natural Gas Orifice #31		 0-2000 Feet
2001-4000 Feet
4001-5000 Feet
5001-7000 Feet
7001-9000 Feet
9001-10000 Feet
L2002600
L2002700
L2002800
L2008100
L2002900
L2005300
L2005400		 Propane Gas Orifice #37
Propane Gas Orifice #38
Propane Gas Orifice #39
Propane Gas Orifice #40
Propane Gas Orifice #41
Propane Gas Orifice #42
Propane Gas Orifice #43		 0-2000 Feet
2001-4000 Feet
4001-5000 Feet
5001-6000 Feet
6001-7000 Feet
7001-9000 Feet
9001-10000 Feet
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Electrical System
Electronic Ignition Controls & Leads
For units with serial numbers beginning with C02F04752 and later:
E2305400
E2033900		 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)*
10449519 High-Tension Lead Assembly
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Temperature Controls
E0014400
E0093200
E0016000
E0082100
E0093800
E0076400		 Temperature Control 100°F to 240°F (On/Off Firing)
Temperature Control 130°F to 230°F (2-Stage Firing)
Low Temperature Control 40°F to 180°F (On/Off Firing)
Low Temperature Control 0°F to 110°F  (2-Stage Firing)
Modulating Temperature Control
Modulating Temperature Control with Outdoor Reset
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High-Limit Switches
E0015900 High-Limit Switch with Manual Reset
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Energy Management Monitor (EM2)
20601500 EM2 Pump Control
E0098300
E2077700
E0109200		 24V Pump Relay
24V Pump Time Delay Relay (0.1-10 Min.)
3-Position Toggle Switch
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Other Electrical Controls
E0023300
E0023500
E2075100
E0106500		 High Gas Pressure Switch with Manual Reset
Low Gas Pressure Switch with Manual Reset
Low-Water Fuel Cut-Off with Manual Reset
High-Limit Switch 195°F
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Miscellaneous Electrical Components
E2079100
E0101800
E0086800		 Transformer
Terminal Block
On/Off Power Switch*
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Water System
Complete Heat Exchanger Assemblies
Factory-assembled heat exchanger assemblies include: tube assembly, in/out header, return header, and all gaskets and hardware.
Complete Heat Exchanger Assembly
with Copper Tubes & Glass-Lined Cast Iron Headers (1-Pass)
1-Pass 2-Pass
20012801
20012802
20012803
20012804
20012805
20012806
20012807		 R20001301
20001302
20001303
20001304
20001305
R20001306
20001307		 2000 Indoor
2450 Indoor / 2200 Outdoor
3050 Indoor / 2500 Outdoor
3500 Indoor / 3200 Outdoor
4050 Indoor / 3600 Outdoor
4500 Indoor / 4000 Outdoor
5000 Indoor / 4500 Outdoor
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Individual Tube Assemblies
Factory-assembled tube assemblies include heat exchanger baffles, baffle retainers and gaskets.
Copper Tube Assembly
with Glass-Lined Cast Iron Headers
BR010801
BR010802
BR010803
BR010804
BR010805
BR010806
BR010807		 2000 Indoor
2450 Indoor / 2200 Outdoor
3050 Indoor / 2800 Outdoor
3500 Indoor / 3200 Outdoor
4050 Indoor / 3600 Outdoor
4500 Indoor / 4000 Outdoor
5000 Indoor / 4500 Outdoor
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CuNi (CuproNickel) Tube Assembly
with Glass-Lined Cast-Iron Headers
BR098901
BR098902
BR098903
BR098904
BR098905
BR098906
BR098907		 2000 Indoor
2450 Indoor / 2200 Outdoor
3050 Indoor / 2800 Outdoor
3500 Indoor / 3200 Outdoor
4050 Indoor / 3600 Outdoor
4500 Indoor / 4000 Outdoor
5000 Indoor / 4500 Outdoor
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Copper Tube Assembly
with Bronze Headers
BR021301
BR021302
BR021303
BR021304
BR021305
BR021306
BR021307		 2000 Indoor
2450 Indoor / 2200 Outdoor
3050 Indoor / 2800 Outdoor
3500 Indoor / 3200 Outdoor
4050 Indoor / 3600 Outdoor
4500 Indoor / 4000 Outdoor
5000 Indoor / 4500 Outdoor
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CuNi (CurpoNickel) Tube Assembly
with Bronze Headers
BR021401
BR021402
BR021403
BR021404
BR021405
BR021406
BR021407		 2000 Indoor
2450 Indoor / 2200 Outdoor
3050 Indoor / 2800 Outdoor
3500 Indoor / 3200 Outdoor
4050 Indoor / 3600 Outdoor
4500 Indoor / 4000 Outdoor
5000 Indoor / 4500 Outdoor
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Other Water System Components
10416100
10416200		 Cast Iron Return Header (2-Pass)
Cast Iron Inlet/Outlet Header (2-Pass)
20021100 Bronze Return Header (2-Pass)
20021000 Bronze Inlet/Outlet Header (1-Pass)
10416700 Cast Iron Return Header (1-Pass)
10417400 Cast Iron Flange (4")
S0095600
S0095300		 Flange Gasket
Header Gasket
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Flow Control Assemblies
20081601

 Automatic Flow Control Assembly 
2000/2450 MBH Indoor
2200 MBH Outdoor
20081602 Automatic Flow Control Assembly 
3050/3500 MBH Indoor
2800/3200 MBH Outdoor
20081603 Automatic Flow Control Assembly
4050/4500/5000 MBH Indoor
3600/4000/4500 MBH Outdoor
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Temperature Control Immersion Wells
E0025900
RE2058300
E0026400		 Non-Plated Immersion Well
Nickel-Plated Immersion Well
Stainless Steel Immersion Well
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Combustion Chamber
20052701
20052702
20052703
20052704
20052705
20052706
20052707		 Complete Tile Assembly 2000 Indoor / Outdoor
Complete Tile Assembly 2450 Indoor / 2200 Outdoor
Complete Tile Assembly 3050 Indoor / 2800 Outdoor
Complete Tile Assembly 3500 Indoor / 3200 Outdoor
Complete Tile Assembly 4050 Indoor / 3600 Outdoor
Complete Tile Assembly 4500 Indoor / 4000 Outdoor
Complete Tile Assembly 5000 Indoor / 4500 Outdoor
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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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