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Operating Instructions continued-
The minimum potable water temperature can be changed by adjusting the thermostat. Before any work is done on
the water heater, disconnect all power to the water heater and heat source (solar collector) by opening the switch(s) at
the main electrical circuit breaker or fuse box. Remove the cover and fold the insulation outward away from the
control. Adjust the thermostat dial using a screwdriver until the minimum acceptable temperature is achieved. The
thermostat has been factory preset to 120°F (49°C). Remember that lower temperature settings are more energy
efficient. Rotate the temperature dial clockwise
to increase water temperature. Rotate the thermostat dial
counter-clockwise
to decrease the temperature setting. Replace the insulation making sure that the control is
well covered and that the plastic terminal shield has not been displaced. Replace the access panel. The water heater
is now ready for operation and the main switch can be closed.
Figure 10 – Thermostat
After the solar water heater completes a heat-up cycle, check the water temperature at a faucet. Allow enough water
to flow to ensure that the faucet water temperature reflects the tank temperature. Adjust the water heater’s
temperature setting as necessary.
Adjusting to a lower temperature setting will not immediately affect water temperature. Draw sufficient water or
allow the water heater to remain idle until a heat-up cycle is initiated. After the heater’s heat-up cycle is complete,
check the water temperature at a faucet to determine if further adjustment is necessary.
Adjusting to a higher temperature may not immediately affect water temperature. If a heat-up cycle begins, allow the
heat-up cycle to complete before checking the water temperature. If a heat-up cycle does not begin, draw sufficient
water or allow the water heater to remain idle until a heat-up cycle is initiated. After the heater’s heat-up cycle is
complete, check the water temperature at a faucet to determine if further adjustment is necessary.
CAUTION
Before adjusting the thermostat, turn off all power supplied to the solar water heater.