4. Emergency Shutdown - Rheem GHE100-130 Use & Care Manual

A. Do turn off manual gas shut-off valve if water heater has been sub-
jected to over heating, fire, flood, physical damage or if gas supply
fails to shut off.
B. Do Not turn on water heater unless it is filled with water.
C. Do Not turn on water heater if cold water supply shut-off valve is
closed.
D. Do Not store or use gasoline or other flammable vapors and liq-
uids, such as adhesives or paint thinner, in vicinity of this or any
other appliance. If such flammables must be used, open doors and
windows for ventilation, and all gas burning appliances in vicinity
should be shut off, including their pilot lights, to avoid vapors ignit-
ing.
NOTICE: Flammable vapors may be drawn by air currents from sur-
rounding areas to the water heater.
E. Do not allow combustible materials such as newspaper, rags or
mops to accumulate near water heater.
F. If there is any difficulty in understanding or following the OPERA-
TION or MAINTENANCE instructions, it is recommended that a
qualified person or serviceman perform the work.
1. TEMPERATURE SETTINGS — The temperature is adjusted to120° F
when shipped from the factory. To meet commercial water use needs,
it is adjustable up to 185°F (85°C). However, water temperatures over
125°F (52°C) can cause severe burns instantly or death from scalds.
This is the preferred starting point for setting the control for supplying
general purpose hot water.
Safety and energy conservation are factors to be considered when
setting the water temperature. The most energy efficient operation will
result when the temperature setting is the lowest that satisfies the
needs consistent with the application.
DANGER
!
hotter water increases the Potential for hot Water SCAlDS.
WARNING
!
When this water heater is supplying general purpose hot water
requirements for individuals, a thermostatically controlled mixing
valve for reducing point of use water temperature is recommend-
ed. Contact a licensed plumber or the local plumbing authority for
further information.
Outlet water temperature will vary during normal operating cycles. Reli-
able temperature readings should be taken shortly after main burner
cycles off during a period of little or no use.
2 CHECK INPUT — Consult the local Gas Company to determine the
heating value of the gas supplied. Check input by clocking gas meter with
all other gas appliances turned off. Use the following formula:
(3,600) x (Heating Value) x (Number of Cubic Feet Timed)
INPUT (btu/h) =
Operation
SAFETY PRECAUTIONS
Seconds Clocked
24
CAUTION
!
hydrogen gas can be produced in a hot water system
served by this water heater that has not been used for a
long period of time (generally two weeks or more). hYDRO-
gEN gAS iS ExTREmElY FlAmmABlE!! To dissipate
such gas and to reduce risk of injury, it is recommended
that the hot water faucet be opened for several minutes
at the kitchen sink before using any electrical appliance
connected to the hot water system. if hydrogen is present,
there will probably be an unusual sound such as air escap-
ing through the pipe as the water begins to flow. Do not
smoke or use an open flame near the faucet at the time it
is open.
WARNING
!
DO NOT exceed input shown on the water heater's rating plate!
To insure accuracy for rating, clock enough cubic feet of gas so that the clocked
time is at least 60 seconds.
DO NOT exceed input shown on the water heater's rating plate!
4. EMERGENCY SHUTDOWN —
WARNING
!
Should overheating occur or the gas supply fail to shut off, turn off
the manual gas control valve to the appliance.
WARNING
!
DO NOT use this appliance if any part has been under water.
immediately call a qualified service technician to inspect the appli-
ance and to replace any part of the control system and any gas
control which has been under water.
If the water heater has been subjected to fire or physical damage, turn
off gas at the manual gas control (shut-off) valve. Do not operate the
water heater again until it has been checked out by a qualified service
technician.