A.O. Smith 300 Series, Инструкция по эксплуатации

Страница: 60 / 68

60
OPERATIONAL PROBLEMS
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
This section of the manual is intended to be an aid in correcting
common operational problems, it is not all inclusive. The installer
may be able to observe and correct certain problems which might
arise when the water heater is first put into operation or when it
is re-fired after a prolonged shutdown. However, only qualified
service technician should perform any service procedures on the
water heater.
Note:
For technical support or to locate a qualified service technician
in your area, call the phone number on the warranty sheet
supplied with this water heater.
ROUGH STARTING, ROUGH OPERATION
Fire and Explosion Hazard
Excessive gas pressure to gas valve can
cause serious injury or death.
Do not use water heater with any gas
other than the gas shown on the rating
plate.
Turn off gas lines during installation.
Contact a qualified installer or service
technician for installation and service.
•
Undersized supply gas line (low volume of supply gas).
•
Low Gas Pressure.
•
Excessive supply gas pressure.
•
Excessive manifold (offset) gas pressure.
•
Incorrect Fuel Type
•
Vent (exhaust) gas recirculation at the vent and intake air pipe
terminations on Direct Vent installations.
•
Excessive equivalent lengths of intake air and/or vent (exhaust)
piping installed.
•
Clogged/blocked intake air screen(s).
•
Clogged/blocked the Main Burner.
MOMENTARY IGNITION
Burn Hazard
Do not reach into the burner housing or
combustion chamber if the water heater
is still hot.
•
Allow the water heater to cool and always use
gloves when handling the main burner.
•
•
The combustion chamber and burner sleeve
and housing become very hot during operation.
CAUTION
If the Main Burner ignites momentarily but does not sustain ignition
allow the water heater to try to ignite up to two more times until
control system locks out and the Ignition Failure Fault message
is displayed on the control system's LCD. If the water heater is
experiencing rough starts. See Rough Starting, Rough Operation
on
this page. For momentary ignition problems without rough starting
check the following:
•
Incorrect manifold (offset) gas pressure.
•
Undersized supply gas line (low volume of supply gas).
•
Low Gas Pressure
•
See the list of possible causes and things to check and repair
for the Ignition Failure Fault message.
•
Clogged/blocked intake air screen(s).
•
Clogged/blocked Main Burner.
NOT ENOUGH OR NO HOT WATER
•
No power to the water heater, check breaker, fuses.
•
Enable/Disable switch in “disabled” position. Set to enable to
allow unit to operate.
•
Hot water supply valve(s) to fixtures closed.
•
Operating Set Point is set too low, Differential setting is set too
high.
•
Temperature Probe Offset setting is causing the heating cycles
to terminate prematurely.
•
The heating capacity of the water heater has been exceeded,
the water heater is unable to meet demand.
•
Colder incoming water temperature lengthening the time required
to heat water to desired temperature.
•
Hot water piping leaks, open faucets, water heater drain valve
leaking or open.
•
Sediment or lime scale accumulation may be affecting water
heater operation.
WATER IS TOO HOT
• Operating Set Point is set too high.
•
Temperature Probe Offset improperly set.
•
If installed check Thermostatic Mixing Valve settings.
•
Lime build-up on temperature probe. Inspect and clean.
NOISY OPERATION
•
Normal operating noise of electrical components; Combustion
Blower, transformer hum, relay contact closure.