Table 4-2 Organizational Troubleshooting - Continued
TEST OR INSPECTION
IMMERSION HEATER ASSEMBLY - Continued
(5) Reinstall heater and tighten locking screws to secure heater.
(6) Reinstall burner inside heater body.
(7) Replace the fuel tank
(8) Reinstall the smokestack on the heater collar.
Step 3. Check fuel valve and fuel line for dogging.
Disconnect the fuel valve and fuel line and dear dogging as follows:
Close the fuel tank vent plug and remove the fuel tank from the heater mounting
bracket (Figure 4-2).
Open the fuel tank vent plug and filler plug and drain the fuel tank
Unscrew the fuel valve elbow and nipple from the fuel tank
Unscrew elbow from nipple.
Unscrew hex nut from valve body and remove gasket and valve stem.
Scrape or rub off any corrosion from the valve, and dean out any obstructions
from inside the valve passages.
Clean out any obstructions from inside the elbow and from inside the nipple.
Reassemble and install the fuel valve.
Refill the fuel tank with fuel through the filler plug opening.
Close the filler plug and install the fuel tank
Step 4. Check burner evaporator plate for dogged holes.
Clean burner as follows:
a. Remove the burner by lifting it out of the heater body.