AERCO KC1000 Heater 2002 - Manual (Page 52)

MAINTENANCE
6-10
Figure 6.14
Air/Fuel Valve Inlet Hose Clamp
16. Using an 11/16” wrench, loosen the compression fittings on the feedback tube between the air/fuel
valve and the differential pressure regulator. Remove the feedback tube, (See Fig. 6.15).
17. Using two 9/16” wrenches remove the two 3/8-16 hex nuts and bolts securing the air/fuel valve to the
differential pressure regulator, (See Fig. 6.15).
18. Remove the air/fuel valve, taking care not to damage the flexible tubing on the throat of the air/fuel
valve.
Figure 6.15
Feedback Tube and Air/Fuel Valve to Differential Regulator Bolts
19. Remove the flue venting from the exhaust manifold.
20. Removing the exhaust manifold insulation will prevent it from being damaged and will make it easier
to handle the exhaust manifold once it is removed. Using a 7/16” wrench or socket, remove the 3 bolts
and fender washers securing the insulation to the exhaust manifold.