John Wood Electric Water Heaters - NEW - Manual (Page 16)

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5. Open the water heater drain valve and allow all of the water
to drain from the tank. Flush the tank with water as needed to
remove sediment.
6. Close the drain valve, refi ll the tank, and restart the heater as
directed in this manual. CAUTION: Do not turn on power to the
water heater unless it is completely fi lled with water.
If the water heater is going to be shut down for an extended period,
the drain valve should be left open.
IMPORTANT: Condensation may occur when refi lling the tank and
should not be confused with a tank leak.
THERMOSTAT REMOVAL / REPLACEMENT
1. Turn “OFF” the electric power supply to the water heater.
2. Remove the outer door. Remove or fold up the insulation pad.
3. A. Models with lower thermostat without high limit: Lift
out the tab as shown below to unclip the terminal cover
from the thermostat. The terminal cover can now be
removed from the thermostat.
FIGURE 10.
B. Models with Upper or Lower Thermostat with High
Limit: Lift out the tab as shown below to unclip the
terminal cover from the thermostat. The terminal cover
can now be removed from the thermostat.
FIGURE 11.
4. Note the position of each wire, then disconnect each wire from
thermostat and slide out of the bracket.
5. Remove the thermostat from behind the thermostat bracket.
6. Place the new lower thermostat in the bracket making sure it fi ts
fi rmly against the tank.
7. Attach the wires to the new thermostat. Ensure that you install
each wire in the correct terminal.
NOTE: Some of the terminals may require straight-in wiring
through an eye-opening. If wires are now looped, recut and
strip wire 3/8” (9.5 mm) to a straight length and insert.
8. Put plastic terminal cover back in place.
9. Replace the insulation to cover the thermostat.
10. Replace outer door then turn the electric power on.
ELEMENT CLEANING / REPLACEMENT
NOTE: These instructions are written for element cleaning and
element replacement for the lower element.
To remove the element from the tank in order to clean or replace it:
1. Before beginning, turn “OFF” the electric power supply to the
water heater.
2. Open a nearby hot water faucet until the water is no longer hot.
3. Turn off the water supply to the water heater at the water shut-off
valve or water meter. See Figure 12.
FIGURE 12.
4. Attach a hose to the water heater drain valve and put the other
end in a fl oor drain or outdoors. Open the water heater drain