PDF《*** OWNER'S MANUAL ***》

40 degrees. See system draining and system start up for instructions. (2.) AUTOMATIC FREEZE PROTECTION Freeze protection is accomplished by an automatic temperature sensitive valve. When the outdoor temperature drops below

42 degrees, the freeze valve begins to open. When the valve opens, it allows water to move from the bottom of the storage tank through the collector and is discharged on the roof. This warm water (approximately

70 to

75 degrees) protects the panel from freeze damage. It does not waste hot water or turn the element on because it is only using water from the bottom portion of the tank and is replaced by city or well water. The valve automatically closes when the temperature in the collector is above

52 degrees. This process will continue all night until the outdoor temperature rises above

42 degrees. Important: this valve should be replaced approx. Every

3 to

5 years for maximum protection against freeze. Important: homes with well water cannot rely on automatic freeze protection;

during power outages, the pump cannot supply water to the valve. In this case, the system needs to be manually drained or an additional freeze valve can be installed on the bottom of the collector which will automatically drain the collector in the event of power outage. HOT WATER BACK-UP SYSTEM Your solar system has been designed to provide an average of 70% to 98% of your hot water needs on a yearly basis. In most cases, no back up will be needed in the summer months. Some back up will usually be needed in the winter months or during periods of continuous cloudy weather. It is recommended that the back up be left off during the winter months;

however, you may want to modify this suggestion based upon your system sizing, your personal experience with your system, and/or your desire to save ($) energy. When you want to rely completely on solar, turn the

230 volt circuit breaker off at the main panel box, or turn the backup on/off switch to the off position (this is only applicable on those systems equipped with the switch.) The backup heating element is controlled by a thermostat which can be adjusted with a screw driver. The suggested setting is between

120 and

140 degrees. See to reset safety switch instructions for safety details when changing thermostat setting. There is also an over-temperature safety reset switch that shuts the power off to the heating element if the water in the tank gets extremely hot. If you do not have hot water when the backup is on, you may need to reset this switch. The reset switch often trips during summer months when solar is exceptionally hot, and is not noticed until fall/winter. TO RESET SAFETY SWITCH (1.) Turn the

220 volt -

30 amp circuit breaker to the water heater, or the tank top power switch, off. (2.) Remove the cover plate. (3.) Peel back the insulation and press the red button. A slight click will indicate reset action. (4.) Replace the insulation and the cover. (5.) Turn the circuit breaker or the tank power switch back on. If the water in the tank is cooler than the setting on the thermostat, the heating element will turn on. When this happens, your electric meter should spin very fast. If not, and the safety switch has been reset, please call for service. SYSTEM MAINTENANCE (1.) As with any hot water heater, it is recommended that the tank be partially drained every six months to remove mineral deposits and sediment. This can be accomplished as follows: (a.) Shut off the water pressure at the valve which lets cold water into the tank. (b.) Attach a hose to the drain valve at the bottom of the tank. (c.) Open the drain valve and allow