State GS6 75 URRBS - Manual (Page 5)

5
CHEMICAL VAPOR CORROSION
WARNING
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF
AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH
CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and air conditioning
refrigerants, swimming pool chemicals, calcium and sodium chloride (water
softener salt), waxes, and process chemicals are typical compounds which
are potentially corrosive. Do not store products of this sort near the heater.
Also, air which is brought in contact with the heater should not contain
any of these chemicals. If necessary, uncontaminated air should be
obtained from remote or outside sources. The limited warranty is voided
when failure of water heater is due to a corrosive atmosphere. (Refer to
the limited warranty for complete terms and conditions.)
EXTENDED NON-USE PERIODS
WARNING
HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM
SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG
PERIOD OF TIME (GENERALLY TWO WEEKS OR MORE). HYDROGEN
GAS IS EXTREMELY FLAMMABLE.
To reduce the risk of injury under
these conditions, it is recommended that the hot water faucet be opened
for several minutes at the kitchen sink before using any electrical water
heater connected to the hot water system. If hydrogen is present, there
will probably be an unusual sound such as air escaping through the pipe
as the water begins to fl ow.
THERE SHOULD BE NO SMOKING OR
OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.
INSULATION BLANKETS
Insulation blankets available to the general public for external use on gas
water heaters are not required for use on this water heater. The purpose
of an insulation blanket is to reduce the standby heat loss encountered
with storage tank water heaters. This water heater meets or exceeds the
current edition of ASHRAE/IES 90.1 standards with respect to insulation
and standby loss requirement making an insulation blanket unnecessary.
WARNING
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions. Failure to follow these instructions can
result in fi re, asphyxiation , serious personal injury or death.
• Do not apply insulation to the top of the water heater, as this will
interfere with safe operation.
• Do not cover the outer door, thermostat or temperature & pressure
relief valve.
• Do not allow insulation to come within 2" (5cm) of the fl oor to prevent
blockage of combustion air fl ow to the burner.
• Do not cover the instruction manual. Keep it on the side of the water
heater or nearby for future reference.
• Do obtain new warning and instruction labels from manufacturer for
placement on the blanket directly over the existing labels.
• Do inspect the insulation blanket frequently to make certain it does
not sag, thereby obstructing combustion air fl ow.
HIGH ALTITUDE INSTALLATIONS
Water heaters covered in this manual have been tested and approved for
installation at elevations up to 7,700 feet (2,347 m) above sea level. For
installation above 7,700 feet (2,347 m), the water heater’s Btu input should
be reduced at the rate of 4 percent for each 1,000 feet (305 m) above sea
level which requires replacement of the burner orifi ce in accordance with
the National Fuel Gas Code ANSI Z223.1/NFPA 54. Contact your local
gas supplier for further information.
Failure to replace the standard orifi ce with the proper high altitude orifi ce
when installed at elevations above 7,700 feet (2,347 m) could result in
improper and ineffi cient operation of the water heater, producing carbon
monoxide gas in excess of the safe limits. This could result in serious
injury or death. Contact your local gas supplier for any specifi c changes
that may be required in your area.
The input reduction is primarily achieved by reducing the size of the main
burner orifi ces. To do this, the main burner orifi ces require replacement
with orifi ces sized for the particular installation elevation. Correct orifi ce
sizing and parts may be obtained from your distributor or manufacturer.
When ordering, be sure to state the model number and the altitude of
the location where the water heater is being installed.
Upon completion of derating of the heater, adjustment to the gas pressure
regulator may be required. See CHECKING THE GAS INPUT section
in this manual for inlet and manifold pressure requirements.
Also due to the input rating reduction required at high altitudes, the output
rating of the water heater is also reduced and should be compensated
for in the sizing of the equipment for application.