HTP EV-80 - Manual (Page 12)

12
LP-04 REV. 4.15.14
PART 5 – OPERATING THE HEATER
Tank must be full of water before 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 heater. The heater is now in
operation.
A. COMBINATION THERMOSTAT AND HIGH LIMIT CONTROL (ECO)
This heater is equipped with a combination Thermostat – High Limit Control (ECO), which is located above the heating element, above
the upper element on dual element heaters. 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.
B. THERMOSTAT ADJUSTMENT AND ECO RESET
There are two thermostats on dual element heaters and one for point of use units. These are set to 120
o
F to reduce the risk of scald
injury. This temperature is satisfactory for average household use.
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. See below for Thermostat adjustment/ECO reset.
IF YOU NEED TO ADJUST THERMOSTAT(S) OR RESET THE ECO
(RED RESET BUTTON):
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 control.
STEP #4
– Reset the ECO by pushing in the red button marked “RESET”.
Adjust the temperature by turning the white adjustment knob.
STEP #5
– Replace the insulation.
Risk of scald injury increases as you increase water temperature.
Failure to replace insulation could result in property damage, severe personal injury, or death.
STEP #6
– Reattach the access cover with the two screws.
STEP #7
– Restore power by replacing the fuse or turning on the circuit breaker.
C. HEATING ELEMENT REPLACEMENT PROCEDURE
If the heating elements need replacement, it is very important to use the same voltage, wattage, and construction. The element sheath
must be incoloy and the hex plug must be made of stainless steel.
Failure to disconnect power from water heater before attempting
to adjust or reset the thermostat(s) will result in property damage,
severe personal injury, or death due to electric shock.
Figure 6 – Thermostat Adjustment