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Table of Contents Page
Introduction HeaterWarnings ........................................................ 3
Introduction ........................................................ 4
Specifications ........................................................ 4
Heater Components
Hydronic 4/5 SC, 12 + 24 volt, Diesel ........................................................ 5
Hydronic 5 S, 12 + 24 volt, Diesel +Gas ........................................................ 6
Hydronic 4/5 SC, 12 volt, Gasoline ........................................................ 6
Principal Dimensions ........................................................ 7
Installation Heater Location ........................................................ 7
Procedures Heater Mounting ........................................................ 8
Heater Plumbing ........................................................ 9
Fuel System ........................................................ 10
Electrical Connections ........................................................ 12
Exhaust / IntakeConnections ........................................................ 13
Control Options ........................................................ 14
Heater Operation Pre-Start Procedures ........................................................ 15
Start-Up ........................................................ 15
Running ........................................................ 15
SwitchingOff ........................................................ 16
Safety Equipment ........................................................ 16
Operational FlowChart ........................................................ 17
Heater Diagnostics Schematics ........................................................ 18
Maintenance / PeriodicMaintenance ........................................................ 24
Troubleshooting / BasicTroubleshooting ........................................................ 24
Repairs Self DiagnosticTroubleshooting ....................................................... 24
TroubleshootingChart ....................................................... 26
Fuel QuantityTest ........................................................ 28
Heater Disassembly / Repair Steps ........................................................ 29
Heater Components Parts Diagram / Scope, Face Lift “SC” Heaters ........................................................ 32
Description &Part #’s, Face Lift “SC” Heaters ........................................................ 33
Parts Diagram / Scope, Face Lift “S” Heaters ........................................................ 40
Description &Part #’s, Face Lift “S” Heaters ........................................................ 41
Parts Diagram / Scope, Early “SC” Heaters ........................................................ 46
Description &Part #’s, Early “SC” Heaters ........................................................ 47
Parts Diagram / Scope, Early “S” Heaters ........................................................ 58
Description &Part #’s, Early “S” Heaters ........................................................ 59
Parts Diagram / Scope, North AmericanHeaters ....................................................... 66
Parts Diagram / Scope, North AmericanHeaters (F/L) ....................................................... 67
Description &Part #’s, North AmericanHeaters ....................................................... 68
Special Notes
Note: Highlight areas requiring special attention or clarification.
Caution: Indicates that personal injury or damage to equipment may occur unless specific guidelines are followed.
Warning: Indicates that serious or fatal injurymay result if specific guidelines are not followed.