American Water Heater 318281-000 사용자 설명서

22

 

FLOW

CLOSED

Figure 25

Check and set the pressure of the air bladder in the 

10. 

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.
Plumb the solar pump station to the storage tank 

11. 

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 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.
Add the supplied copper drain valve to the lowest 

12. 

point in the collector loop (near the tank by the 
bottom coil outlet labeled “to pump” in most cases)

Push the union nut 

1. 

d

 and the cutting 

ring e onto 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. 
Insert the support sleeve 

2. 

f

 into 

the copper pipe. 
Insert the copper pipe with the 

3. 

plugged-on individual parts (d, e 

and f) all the way into the housing 

of the compression fitting g.
First screw the union nut 

4. 

d

 

manually. 
Tighten the union nut 

5. 

d

 by 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

1

2

K

H

3

4

V

L

½” copper tube -  from 

1. 

the collector outlet 
(top) to the collector 
return compression 
fitting (K)
½” copper tube – from 

2. 

the collector inlet 
(bottom) to the collector 
supply compression 
fitting (L)
¾” copper tube – from 

3. 

the upper tank coil 
inlet marked “from 
collector” to the tank 
supply threaded fitting 
(H)
¾” copper tube – 

4. 

from the lower tank 
coil outlet marked 
“to pump” to the tank 
return threaded fitting 
(V)

Figure 27

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.

Check valve is 
operating, flow 
only in flow 
direction

Check valve is not 
operating, flow in 
both directions.

Ball valve 
closed, 
no flow.

Figure 28