SECTION VII
OPERATING INSTRUCTIONS
SYSTEM START-UP
Follow solar collector installation instructions to place collector in operation. Ensure that solar fluid flow operation is established for the installed system.
SEQUENCE OF HEATING OPERATIONS -SOLAR AND ELECTRIC BACKUP
1.The solar controller senses a large enough temperature difference between the lower tank and the solar collector to transfer heat into the tank.
a.The solar controller activates a circulator/pump to flow fluid through the heat exchanger and solar collector, transferring heat into the storage tank until the temperature difference is significantly reduced.
2.The upper element thermostat senses that the water temperature stored in the upper portion of the tank drops below the desired setting.
a.The upper element is energized to heat stored water to the desired temperature. Once the water in the upper tank is heated to the desired temperature, the element is
3.The lower element thermostat senses that the water temperature stored above the solar heat exchanger drops below the desired setting.
a.The lower element is energized to heat stored water to the desired temperature. Once the water in the lower tank is heated to the desired temperature, the element is
WATER TEMPERATURE ADJUSTMENT
Table 7 details the approximate relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications.
WARNING
SCALDING
This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury. By setting the thermostat on this water heater to obtain an increased water temperature, you may create the potential for scald injury. To protect against injury, you should install an ASSE approved mixing valve (a device to limit the temperature of water to protect against scald injury via mixing hot and cold water supply) in the water system. This valve will reduce point of discharge temperature in branch supply lines. This water heater was shipped with an ASSE approved mixing valve. Install this valve according to the directions in the mixing device container. DO NOT OPERATE THIS WATER HEATER A MIXING DEVICE. If this water heater was shipped without a mixing device, contact the manufacturer.
Water temperature over 125°F can cause severe burns instantly or death from scalds.
Children, disabled and elderly are at highest risk of being scalded.
Review this instruction manual before setting temperature
at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available.
Figure 9 – Scald Warning
APPROXIMATE
TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F | More than 5 minutes |
125°F | 1 ½ to 2 minutes |
130°F | About 30 seconds |
135°F | About 10 seconds |
140°F | Less than 5 seconds |
145°F | Less than 3 seconds |
150°F | About 1 ½ seconds |
155°F | About 1 second |
Table 7 – Scald Relationships
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