Infinity 480HD, Instruction For User, Installation & Servicing, Page: 57 / 64

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LT 7602 Issue No2 (07/17)
480 HD MAINTENANCE INSTRUCTIONS
Replacement Of The Gas Valve
Follow the sequence to remove the burner carrier assembly.
Disconnect the thermocouple from the rear of the gas valve.
Undo the three compression nuts securing the pipes to the gas valve and remove the two M4
nuts fixing the valve to the valve mounting brackets.
Clean, service or replace the gas valve.
Re-assemble in the reverse order.
Turn on the gas supply, check for soundness and re-commission the appliance.
Replacement of The Injectors
Follow the sequence to remove the burner carrier assembly.
Undo the compression nut on the supply pipe.
Remove the two screws retaining the burner assembly to the carrier and lift away from the
injector.
Unscrew the locking nut holding the injector and silencer bracket on the burner carrier.
Remove injectors from assembly. Clean or replace injector.
Re-assemble in reverse order.
Replacement of the Oxy-Pilot Assembly
Note: If the pilot assembly is replaced it must be replaced by an identical unit from the same manufacturer and replaced as a complete unit.
Follow the sequence to remove the burner carrier assembly.
Undo the compression nut on the supply pipe at the pilot.
Carefully pull off the ignition lead.
Disconnect the thermocouple at the end of the gas valve.
Remove the two fixing screws attaching the assembly to burner carrier.
Re-assemble in the reverse order.