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Lochinvar Solar Water Heater Tank

» General Features
» Tank Assembly
» System Sizing

Solar Water Storage Tank Features:tank

  • Brass Drain Valve
  • Pre-Wired Tank Sensor Lead
  • Exceeds ASHRAE Energy Standards
  • Certified at 300 psi test pressure for 150 psi working pressure
  • Magnesium Tank Saver – Large diameter anode rod provides lasting protection from the effects of electrolytic corrosion.
  • Dielectric Nipples protect the tank from corrosive action between dissimilar metal.
  • Thermal Isolation – Unique design prevents heat loss through the bottom of the tank.
  • Side Relief Valve Tapping – This provides quicker, labor-saving installation.
  • Heating Element – 4500 watt immersion type heating element for heating system back-up.
  • Glass-Lined Tank – Fused to the tank at
  • 1600ºF, the durable glass lining is triple-tested, assuring lasting protection against rust and corrosion while providing clean, clear hot water.
  • Foam Insulation – Improved formulation provides uniform tank coverage with a thick blanket of insulating foam. This non-CFC polyurethane closed cell foam provides an R-Value of 16 to minimize standby heat loss and maximize heat retention.
  • Warranty - Six Year limited tank warranty

Tank System Assembly:

When tank is purchased with a solar water heater kit, the system comes pre plumbed and wired as a complete assembly. This is called the Tank System Assembly or TSA. The TSA contains the water heater tank, pump controller, tank sensor, drain valve, system drain valve and the wiring and piping to make all connections. The TSA, the collectors and the interconnect piping make up the complete system.

• Pump: The system comes standard with a single TACO 006BC4 circulator pump. It uses 115V regular AC power which is supplied from the controller. When heat is available in the collector the pump is energized to circulate the water through the interconnect piping to the collectors where it gains heat. For additional options, click here

• Controller: The controller is powered by 115V house current and is the device that determines if solar energy is available. The controller, through the sensors, constantly measures the temperature of the water heater tank and the collector, comparing them to see if the collector is hotter then the tank.

• Sensors: The system contains 2 sensors, one at the outlet of the collector and one on the bottom of the water heater tank. The controller uses these 2 sensors to measure tank and collector temperatures. They are simple thermistor (thermal resistors) type sensors that have an inverse reaction to temperature. As the temperature goes, up the resistance goes down. The controller is calibrated to read this as temperature changes. As the collector heats up the resistance goes down and at the right point the controller turns on the pump. The reverse happens when the collector cools off.

• Water Heater Tank: This is a highly insulated glass lined steel tank that is constructed much like any other water heater, except that it also has additional inlet and outlet for the solar connections.

• Temperature and Pressure Relief Valve: This device is inserted into the water heater tank for safety. It is located on top of the tank. The T&P relief valve is preset to open and discharge if either a high pressure or high temperature situation occurs in the water heater. All water heaters regardless of whether they are solar power or not, must have this safety device which is required by national building codes.

• Isolation Valve: Also called "Shut Off Valve", this valve is installed in the cold water service line to the water heater. It is used to isolate the system for maintenance, repairs and service.

lochinvar specifications

Model Gal Cap. A B D E F Weight
FTA066 65 59� 22� 52-1/2� 165
FTA082 80 59� 24� 52-1/2� 38� 8" 210
FTA120 119 62-3/4� 28� 56� 38-1/4� 8" 310

Solar Water Heater System Sizing & Performance

Performance varies depending on the type and size of the system, the amount of sun available at the site, proper installation, and the tilt angle and orientation of the collectors. We can perform a solar site analysis for you or show you how to do your own to ensure you select the best system to meet your needs.

Sizing Your Solar Water Heater System
Proper sizing and selection of your system will insure years of trouble-free hot water service to your home. A good rule of thumb for sizing your system consists of two parts; Collector size and Solar storage.

Collector size:
Collector size is calculated at about 20 ft² of collector area for each of the first two family members and 8 ft² for each additional family member.

Solar Storage:
Solar Storage, or tank size, is calculated at a ratio of at least 2 gallons of storage capacity to 1 ft² of collector area.

zone map   The models below are designed for tropical or southern climates where freeze seldom occurs. Recommended for region A on map.

Persons per
Sq. Ft.
1- 4 X 8
66 gal
1 - 4 X 10
80 gal
2 - 4 X 8
120 gal
6 or more
2 - 4 X 10
120 gal

Download Warranty

To purchase tank with solar water heater kits, click here.

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