PLUMBING CONFIGURATION
FLOW | CLOSED |
Figure 25
10. | Check and set the pressure of the air bladder in the |
| expansion tank to 25 psi. If the pressure is higher |
| bleed pressure out until it is correct. If the pressure |
| is too low add air by use of a compressor or bicycle |
| pump until the pressure is correct. |
11. | Plumb the solar pump station to the storage tank |
| and to the collector: The tank connections should |
| use ¾” copper pipe and can be connected using |
1 | 2 | L |
K
H
V
3 4
1.½” copper tube - from the collector outlet (top) to the collector return compression fitting (K)
2.½” copper tube – from the collector inlet (bottom) to the collector supply compression fitting (L)
3.¾” copper tube – from the upper tank coil inlet marked “from collector” to the tank supply threaded fitting
(H)
4.¾” copper tube – from the lower tank coil outlet marked “to pump” to the tank return threaded fitting
(V)
the threaded adaptors provided. The collector |
connections should use ½” copper pipe and can be |
connected with the the compression fittings provided. |
The total piping run in the solar loop should not |
exceed 200 equivalent feet. Failure to limit the line |
length may cause poor system performance and lead |
to premature pump failure. |
12. Add the supplied copper drain valve to the lowest |
point in the collector loop (near the tank by the |
bottom coil outlet labeled “to pump” in most cases) |
Installing the ½” copper to and from the collector using the compression fittings.
1.Pushtheunionnutdandthecutting ring eonto the copper pipe c. The pipe must protrude at least 3/8” (3 mm) from the cutting ring in order to ensure the force transmission and the sealing.
2.Insert the support sleeve f into the copper pipe.
3.Insert the copper pipe with the
4.First screw the union nut d manually.
5.Tighten the union nut dby rotating one full turn. Hold the housing of the compression fitting g to avoid rotation in order to avoid damaging the sealing ring.
Figure 26
Figure 27
FUNCTION
Check valves
The solar station is equipped with check valves in the supply and the return ball valve (J, Q).
For filling, venting and flushing of the installation the check valves must be turned to the correct position. To set the proper position for the check valves take off the temperature gauges (C, E), remove the top cover (D) and turn the ball valves into the proper position using a wrench (see Figure 28). In the 45° position the balls in the ball valves push the check valves open.
During operation the ball valves must be in 0° position.
0° | 45° | 90° |
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|
|
|
|
|
Check valve is | Check valve is not | Ball valve |
operating, flow | operating, flow in | closed, |
only in flow | both directions. | no flow. |
direction |
|
|
| Figure 28 |
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