Instructions / Assembly

ManualsBrandsRheem ManualsCommercial Electric Water HeatersCommercial 10 Gal. 480-Volt 12 kW 3 Phase Electric Booster Water Heater

TO PLACE WATER HEATER IN OPERATION:

Make certain tank is completely filled with water before

placing the water heater in operation. (Refer to Installation

Section of this manual)

1. WATER TEMPERATURE SETTING — To comply with

safety regulations and reduce the risk of scald injury,

the thermostat(s) of the water heater has been set at

the factory to a setting corresponding to 120° F. (49°C)

This is the preferred starting point for setting the con-

trol for general purpose hot water. To meet commer-

cial water needs, the Booster model’s thermostat is

adjustable to 190° F (88°C) to insure the 180° (82°C) F

minimum for dishwasher rinse applications and other

commercial purposes.

Water temperatures over 125°F (52°C) can cause severe

burns instantly or death from scalds.

Safety and energy conservation are factors to be

considered when setting the water temperature on the

thermostat. The most energy efficient operation will

result when the temperature setting is the lowest that

satisfies the needs consistent with the application.

There is a hot water SCALD POTENTIAL if the thermostat

is set too high.

NOTE: When this water heater is supplying general pur-

pose hot water requirements for use by individuals, a

thermostatically controlled mixing valve for reducing

point of use water temperature is recommended to re-

duce the risk of scald injury. Contact a licensed plumber

or the local plumbing authority for further information.

Outlet water temperatures will vary during normaloper-

ating cycles. Reliable temperature readings should be

taken shortly after the thermostat(s) cycle off during a

period of little or no use.

If water temperature other than 120° F (49°C) is need-

ed, the following instructions will apply depending on

model.

SURFACE MOUNTED THERMOSTAT MODELS:

Be certain power to the water heater is turned OFF be-

fore adjusting temperature setting of thermostat.

A. Do turn off power to water heater if it has been

subjected to over heating, fire, flood or physical dam-

age.

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.If there is any difficulty in understanding or follow-

ing the OPERATION or MAINTENANCE instructions,

it is recommended that a qualified person or service-

man perform the work.

Hydrogen gas can be produced in a hot water sys-

tem served by this water heater that has not been

used for a long period of time (generally two weeks

or more).

HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To-

dissipate such gas and to reduce risk of injury, it

isrecommended 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 escaping 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.

SAFETY PRECAUTIONS

CAUTION

Operation

TURN OFF

POWER

BEFORE

SERVICING

LOW

MED

To adjust the water temperature on Surface Mounted

Thermostat models, insert a small straight screw-

driver into slotted screw of indicator and move indi-

cator to desired setting.See Operation Section of this

Manual for details.

CAUTION!! — Hotter water increases the risk of

SCALDING!

Surface Mounted

Thermostat

Figure 4. — Thermostat Adjustment

CAUTION

DANGER

To adjust the water temperature on Im-

mersion Thermostat models,turn thermo-

stat dial to align desired mark with index

line above thermostat. See Operation

Section of this Manual for details.

Immersion Thermostat

°F

E-10 Model Only

WA RNING