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Part 5 - Installation Checklist
Water Heater Location
Close to area of heated water demand
Indoors and protected from freezing
temperatures
Area free of flammable vapors
Provisions made to protect area from water
damage and control thermal expansion
Sufficient room to service heater
Relief Valve
Temperature and Pressure Relief Valve properly
installed and discharge line run to open drain
Discharge line protected from freezing
Wiring
Power supply voltage agrees with water heater
rating plate
Branch circuit wire and fusing or circuit breaker
of proper size
Electrical connections tight and unit properly
grounded
Water Supply
Water heater completely filled with water
BEFORE operating the unit
Air purged from water heater and piping
Water connections tight and free of leaks
Table 4 - Installation Checklist
Part 6 - Operation
Tank must be full of water before the power is turned on. Heating
elements will be damaged if energized for even a short time
while tank is dry. Failures due to "dry-firing" ARE NOT covered by
warranty.
After water and electrical connections have been made and tank is
filled with water, turn on power to the heater. The heater is now in
operation.
A. Combination Thermostat and High Limit Control (ECO)
Each water heater is equipped with a combination Thermostat
- High Limit Control (ECO). Thermostats are located above the
heating elements. If for any reason the water temperature becomes
excessively high, the ECO breaks the circuit to the heating element.
Once the switch opens it must be reset manually. However,
THE CAUSE OF THE OVER TEMPERATURE CONDITION MUST BE
CORRECTED FIRST.
The cause of the high temperature condition must be investigated
by a qualified service technician and corrective action must be
taken BEFORE placing the water heater back in service. Failure to
do so could result in property damage, severe personal injury, or
death.
B. Thermostat Adjustment and ECO Reset
There are two thermostats on dual element heaters. If temperature
adjustment is necessary, TURN OFF POWER TO HEATER, remove
black access cover and insulation. The thermostat protective cover
SHOULD NOT be removed. Set temperature indicator to desired
temperature. Replace insulation and the black access cover. Turn on
power to the heater.
Yes
No
Failure to disconnect the power from the water heater before
attempting to adjust or reset the thermostat(s) will result in property
damage, severe personal injury, or death.
IF YOU NEED TO ADJUST
THERMOSTAT(S) OR RESET
THE ECO (RED RESET
BUTTON)
STEP #1 - Turn off power to
Yes
No
the water heater by removing
fuse or shutting off at circuit
breaker.
STEP #2 - Remove the two
screws that hold the access
Yes
No
cover in place. Remove the
cover.
STEP #3 - Remove the
insulation to expose the
thermostat.
STEP #4 - See Figure 11
a. Reset the ECO by pushing
in the red button marked
Yes
No
"RESET".
b.
Adjust
temperature by turning the
white
adjustment
Turning the knob to the right
(clockwise) makes the water
hotter. Turning the knob to
the left (counterclockwise)
makes the water cooler.
Step #5 - Replace the
insulation.
Step #6 - Reattach the access
cover with the two screws.
Step #7 - Restore power by
replacing the fuse or turning
on the circuit breaker.
Step #8 -
a. After resetting the ECO,
ensure the water heater is
operating properly before
leaving the installation.
b. After adjusting the water
temperature, allow the water
heater enough time to heat
the water to temperature.
After the water heater has
stopped heating, measure
the water temperature at
a hot water outlet in the
structure.
Step #9 - If the water heater
is operating properly and
the water temperature is
satisfactory, adjustment is complete.
Risk of scald injury increases as you increase water temperature.
Failure to replace insulation or access cover could result in property
damage, severe personal injury, or death.
the
water
knob.
Figure 6 - Detail of Step #4
ahl-631 Revision Date 2.14.22
11
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