State SBN85 390NE A - Manual (Page 34)

34
Complaint Cause
remedy
user Qualified serViCe agenCy
*Water not hot enough Thermostat set too low. Set thermostat dial to a higher
temperature
Upper and/or lower temperature
probe out of calibration.
Call qualified service agency Check continuity and resistance (Ohms)
of upper and lower temperature probes.
replace probes if out of specification.
*Insufficient hot water
*See WATer TeMPerATUre
CONTrOl WArNING (on page
12).
Thermostat set too low. Set thermostat dial to a higher
temperature
Upper and/or lower temperature
probe out of calibration.
Call qualified service agency Check continuity and resistance (Ohms)
of upper and lower temperature probes.
replace probes if out of specification.
Main manual gas shutoff valve
partially closed.
Open main manual gas shutoff
valve to fullest extent.
heater too small for demand. Space usage to give heater time
to restore water temperature.
heater recovery is slower. Call qualified service agency Check gas input. If incorrect, adjust gas
pressure or replace burner orifices.
Gas pressure switch doesn't close. Call qualified service agency Temporarily bypass the gas pressure
switch connections and measure
gas supply pressure while the unit is
running. If less than 5.2" WC, adjust
the gas supply pressure above 5.2" but
less than 11". If greater than 5.2" WC,
replace the gas pressure switch.
Water temperature too hot. Thermostat set too high. Set thermostat to a lower setting.
heater makes sounds: sizzling. Condensation on outside of
tank, normal.
rumbling. Sediment accumulation on
bottom of tank.
Drain a quantity of water through
drain valve. If rumbling persists,
call a qualified service agency.
Delime heater.
Ticking or metallic sounds. expansion and contraction -
normal.
Pounding or water hammer. Air chambers in piping have
become waterlogged. Thermal
expansion tank damaged,
improperly charged, or
improperly sized.
Drain piping system and refill.
heater must be off while this
is being done. Check thermal
expansion tank charge pressure
when the water system pressure
is zero.
Follow the manufacturers instructions
for proper charging of the thermal
expansion tank.
Combustion noises. Too much primary air. Call service agent.
Overfired heater; Incorrect
burners or orifice for type of gas
used.
Call service agent. Check and correct as necessary.
Water leaks. Drain valve not closed tightly. If drain valve cannot be closed
tightly, replace.
Possible condensation if tank
is undersized or stored water is
below 110 degrees.
Increase tank temperature
setting (add a mixing valve
if setting will be above 120
degrees).
If leakage source cannot be
corrected or identified, call
qualified service agency.
Shut off gas supply to heater
and close cold water inlet valve
to heater.
repair or in case of suspected tank
leakage, be certain to confirm before
replacing heater.
Gas odors. heater is over fired Shut off gas supply to heater
and call a service agent.
Check for sooted flue passage.
Check for obstructed vent line.
Check backdraft or lack of draft
Possible gas leaks. Shut off gas supply to heater
and call gas company at once
trouBleshooting