John Wood SpaceSaver (2.5 Gallon) - Manual (Page 10)

10
NOTE: During low demand periods when hot water is not
being used, a lower thermostat setting will reduce energy
losses and may satisfy your normal hot water needs. If hot
water use is expected to be more than normal, a higher
thermostat setting may be required to meet the increased
demand. When leaving your home for extended periods
(vacations, etc.) turn the thermostat to its lowest setting.
This will maintain the water at low temperatures with
minimum energy losses and prevent the tank from freezing
during cold weather.
Operational Conditions
Anode Rod/Water Odour
Each water heater contains at least one anode rod, which
will slowly deplete while protecting the glass-lined tank
from corrosion and prolonging the life of the water heater.
Once the anode is depleted, the tank will start to corrode,
eventually developing a leak. Certain water conditions will
cause a reaction between this rod and the water. The most
common complaint associated with the anode rod is a “rotten
egg smell” produced from the presence of hydrogen sulfide
gas dissolved in the water.
IMPORTANT: Do not remove this rod permanently as it
will void any warranties. The parts list
includes a special anode that can be
ordered if water odour or discoloration
occurs.
NOTE: This rod may reduce but not
eliminate water odour problems. The
water supply system may require
special filtration equipment from a water
conditioning company to successfully
eliminate all water odour problems.
Artificially softened water is exceedingly
corrosive because the process
substitutes sodium ions for magnesium
and calcium ions. The use of a water
softener may decrease the life of the
water heater tank.
The anode rod should be removed from
the water heater tank every year for inspection. The following
are typical (but not all) signs of a depleted anode rod:
•
The majority of the rods diameter is less than 10mm
(3/8 in.).
• Significant sections of the support wire (approx. 1/3 or
more of the anode rod’s length) are visible.
If the anode rod show signs of either or both it should be
replaced.
NOTE: Whether reinstalling or replacing the anode rod,
check for any leaks and immediately correct if found.
The anode rod in this unit is attached to the element flange.
For removal instructions, see “Heating Element Cleaning/
Replacement”.
Water Heater Sounds
During the normal operation of the water heater, sounds or
noises may be heard. These noises are common and may
result from the following:
1. Normal expansion and contraction of metal parts
during periods of heat-up and cool-down.
2. Sediment buildup in the tank bottom will create
varying amounts of noise and may cause premature
tank failure. Drain and flush the tank as directed under
the “Draining and Flushing” section.
Resetting the High Limit Control
This water heater is equipped with one or more adjustable
temperature regulating thermostats and a manual reset
high limit control. The following procedures must be
performed when resetting the high limit control.
1. Disconnect the electrical power. Do not attempt to reset
thermostat with power on.
2. Remove the front panel as described in the “Removing
the Front Panel” section.
3. Remove the insulation to expose the reset button.
4. Reset the high limit by pushing in the red button.
5. Replace the insulation so that it completely covers the
thermostat and element.
6. Replace the front panel.
7. Reconnect the electrical power and turn on the water
heater.
Exposed
Support
Wire
Pitted
Anode
Rod
Exposed
Support
Wire
Figure 9:
Anode Rod Depletion