State Standard Systems - Manual (Page 25)

25
solution provides freeze protection down to -30° F and
burst protection down to -60° F.
Use of heat-transfer fluid other than a maximum 50/50
mix by volume of Propylene Glycol and distilled or de-
mineralized water is not permitted. Use of any heat-
transfer fluid other than that specified by the appliance
manufacturer will void warranty, and may result in poor
performance, equipment damage, or risk to health and
safety.
fillinG
19. 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.
20. Turn the return ball valve (J) to 0° (vertical) so that flow
is only allowed in the proper direction.
21. 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.
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. Open the air vent at the top of the collector array until
all of the air has been dispersed then close the air vent.
24. Remove the cap from the front of the Air Scoop (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. After
all air has been evacuated, close the vent with a flat
head screwdriver and replace the cap on the front of
the Air Scoop (I).
25. 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)
26. 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.
27. Connect the expansion tank and verify the system
pressure. If it has dropped, open the fill valve (P) and
turn on the transfer pump. Repeat system pressure
setting in step 26.
28. Remove the fill and drain hoses and close the fill and
drain valves (P,T) with the caps provided. The caps
only serve to protect the valves against dirt. They are
not designed to withstand high system pressures, the
valves must be closed.
29. Plug in the solar pump station to a 115V outlet and turn
the pump on using the HND mode (see Pump Station
Control Instruction section). HND setting should be
set to “ON”.
30. 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.
See Table 5.
NUMBER OF COLLECTORS
1 2 3 4
COLLECT
OR
SIZE
3.5’ x 7’ 0.7 1.4 2.1 2.8
4’ x 8’ 1.0 2.0 3.0 4.0
4’ x 10’ 1.3 2.6 3.8 5.0
FLOW RATE IN GPM
Table 5.
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.
31. Replace the front cover (D) and re-insert the red
temperature gauge (C) in the return ball valve (J) and
the blue temperature gauge (E) in the supply ball valve
(Q).
32. Set the controller to operate in automatic mode (see
Pump Station Control Instruction section).
33. After the system has been running for several days
open the air vent at the top of the collector array until
all of the air has been dispersed then close the air vent.
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 temperature-resistant container under the drain
valve at the lowest point of the solar thermal installation
(usually near heat exchange coil at the bottom of the
tank).
3. Open the drain valve at the lowest point of the solar
thermal installation.
4. Open the air vent at the top of the collector array. This
will serve as a vacuum break to aid in draining.
5. Dispose of the solar fluid observing any local code.
ATTENTION: Upon completion of the pump station
installation and prior to the pump station start-up the
included pump station valve diagram label must be attached
to the pump station piping so that it is in plain view.