lp-790 Revision Date 1.3.22
11
Part 5 - Installation Checklist
Water Heater Location
Yes
No
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
Yes
No
Temperature and Pressure Relief Valve properly
installed and discharge line run to open drain
Discharge line protected from freezing
Wiring
Yes
No
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
Yes
No
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.
A. Combination Thermostat and High Limit Control (ECO)
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.
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. Use a flat head screwdriver to set temperature
indicator to desired temperature. Replace insulation and the black
access cover. Turn on power to the heater.
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)
Figure 6 - Detail of Step #4
STEP #1
- Turn off power to
the water heater by removing
fuse or shutting off at circuit
breaker.
STEP #2
- Remove the two
screws that hold the access
cover in place. Remove the
cover.
STEP #3
- Remove the
insulation to expose the
thermostat.
STEP #4 - See Figure 6
a.
Reset the ECO by pushing in
the red button marked “RESET”.
b.
Adjust the water
temperature by turning the
white adjustment knob.
Turning the knob to the right
(clockwise) makes the water
hotter. Turning the knob to the
left (counterclockwise) makes
the water cooler.
