14.Turn on the supply water and open the fill valve (P) then leave running for 15 minutes to flush debris out of the solar loop
15.After the 15 minute flush turn off the supply water at the source and allow the system to drain. When water stops flowing out of the discharge hose close the fill valve (P)
16.Close the drain valve (T) on the pump station and move this hose to the drain valve that was installed at the lowest point of the solar loop (near the bottom of the tank)
17.Open this drain valve with a flat head screw driver and open the fill valve (P) slowly to vent the system and allow the remaining water to drain out. In order to vent the system completely it is necessary to open the flow restrictor (S) - turn with flat head screwdriver until vertical.
FILLING
18.Close the lower loop drain valve with a flat head screw driver and move the discharge hose from the lower valve to the drain valve (T) on the pump station and open this valve. The other end of the discharge hose will be placed into the glycol solution container.
19.Turn the return ball valve (J) to 0° (vertical) so that flow is only allowed in the proper direction.
20.Connect a fill hose from the glycol container to a 1/2 HP transfer pump and another hose from the transfer pump to the fill valve (P) then open this valve.
21.Open the cap on the automatic air vent at the top of the collector array 3 full turns counterclockwise to vent any air in the solar loop (do not remove cap completely).
22.In order to flush as much air as possible from the system, turn on the transfer pump to fill the system with the glycol solution and allow to circulate for
15 minutes or until no bubbles are returning to the collector.
23.Remove the cap from the front of the airstop (I) and open the vent with a flat head screwdriver. This will release air that has been captured by the system during circulation. Cover small outlet port with a rag as fluid will be ejected after the air is evacuated.
24.Turn the supply ball valve (Q) to 0° (vertical) so that flow is only allowed in the proper direction and ensure that the flow restrictor (S) is completely open (vertical)
25.With the transfer pump still running close the drain valve and allow to system to rise to an operating pressure of 30 psi on the pressure gauge then close the fill valve and turn off the pump. If the pressure has exceeded 30 psi after the pump is off then slowly open the drain valve and relieve pressure until the pressure gauge reads 30 psi, then close the drain valve.
26.Remove the fill and drain hoses and close the fill and drain valves (P,T) with the caps provided.
27.Plug in the solar pump station to a 115V outlet and turn the pump on using the manual mode (see Pump Station Control Instruction section).
28.Adjust the pump speed using the pump speed selector (R) to the lowest setting possible to set the system flow rate equal to or higher than the final system flow rate. If the flow rate is higher than necessary turn the flow restrictor (S) on the flowmeter with a flat head screwdriver to reduce the flow to the actual required:
2 panel system: 1.4 gpm
3 panel system: 2.1 gpm
Cycle the pump on and off in manual mode to check whether the starting torque is sufficient with the pump speed selected. If flow does not start properly a higher speed may need to be selected and the flow reset to the proper level with the flow restrictor (S) Again check the installation for leaks and ensure both ball valves are open completely.
29.Replace the front cover (D) and
30.Set the controller to operate in automatic mode (see Pump Station Control Instruction section).
31.After the system has been running for several days the cap on the automatic air vent at the top of the collector array should be closed by turning the cap counterclockwise by hand until tight.
DRAINING
1.Open the check valves in the supply and the return ball valves (J,Q) by turning the ball valves to position 45° with an appropriate wrench
2.Place a
3.Open the drain valve at the lowest point of the solar thermal installation.
4.Open the automatic air vent at the top of the collector array 3 full turns counterclockwise by hand (cap should not be completely removed). This will serve as a vacuum break to aid in draining.
5.Dispose of the solar fluid observing any local code.
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