Water Connections continued-
2.For a drainback solar heating system, refer to Figure 4. The solar water heater connection labeled “FROM SOLAR COLLECTOR” should be piped to the solar collector supply piping. Mount the circulator making sure the flow arrow points toward the water heater. The use of
Figure 4 - Solar Collector Piping in Drainback Installation
FILL SOLAR COLLECTOR SYSTEM
1.Fill solar heating system appropriately with water or a propylene glycol/water mix.
2.Verify pump flow and direction. In a closed loop system, purge all air from the collector/water heater piping.
3.Check system for leaks. Repair as necessary.
a. In a closed loop system, check for leaks when flow is stopped and the operating pressure is maintained.
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