State Standard Systems - Manual (Page 23)

23
11. 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.
12. 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
the threaded adaptors provided. The collector
connections should use ½” copper pipe and can be
connected with 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.
13. 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)
14. Install a discharge pipe to the pump station relief valve
that must terminate a maximum of six inches above a
floor drain or external to the building.
installing the ½” copper to and from the collector using
the compression fittings.
1. Push the union nut  and
the cutting ring  onto the
copper pipe  . 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  into
the copper pipe.
3. Insert the copper pipe with the
plugged-on individual parts (  ,
 and  ) all the way into the
housing of the compression
fitting  .
4. First screw the union nut 
manually.
5. Tighten the union nut  by
rotating one full turn. Hold the
housing of the compression
fitting  to avoid rotation in order
to avoid damaging the sealing
ring.
Figure 25.
plumBinG confiGuration
V
L
H
K
1 2
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)
Figure 26.
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
27. 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°
Check valve is
operating, flow
only in flow
direction
Check valve is not
operating, flow in
both directions.
Ball valve
closed,
no flow.
Figure 27.