Table 2-2. Unit Troubleshooting (Continued)
TEST OR INSPECTION
12. WATER HEATER SMOKE ESCAPES FROM AROUND BOILER BOX COVER.
Check for excessive wear and deterioration of boiler box gasket.
If gasket is defective, replace gasket.
If gasket is serviceable, proceed to next step.
Check for loose nuts securing smoke box cover and burner head assembly.
If nuts are loose, tighten nuts.
If nuts are secure and problem persists, notify your supervisor.
13. WATER HEATER TEMPERATURE GAGE SHOWS WATER EXCEEDS
Check for improper setting of temperature control.
a. If control is improperly set, adjust temperature control to a lower setting.
b. If control is properly set, proceed to next step.
High voltage is present on this equipment. Do not perform
maintenance with power on. Death or serious injury may
Check for loose temperature control knob.
a. If knob is loose, adjust knob and tighten setscrew.
b. If knob is tight, proceed to next step.
Check for defective temperature control. With power off, measure continuity between
two control wires. As temperature setting is increased the open circuit should
abruptly change to a shorted circuit.
a. If control is defective, replace temperature control.
b. If control is not serviceable, proceed to next step.