13
15.
DRAINBACK DIFFERENTIAL TEMPERATURE CONTROLLER
See instructions provided with controller in box.
ALL CONNECTIONS SHOULD BE MADE IN
ACCORDANCE WITH LOCAL ELECTRICAL
CODES!
Specifications:
OPERATING VOLTAGE
105 to 125 vac, 60 Hertz
CONTROL RELAY CONTACT RATING
One third HP inductive load.
TURN-ON DIFFERENTIAL
10
0
F (+1
0
F) for Storage Sensor at 135
0
F
TURN-OFF DIFFERENTIAL
5
0
F (+1
0
F) for Storage Sensor at 135
0
F
SENSOR MATCHING ACCURACY
1
0
F or less at 135
0
F
MAXIMUM SENSOR TEMPERATURE
300
0
F
Figure 17
16.
FILLING AND DRAINING THE DX RESERVOIR
Filling the “Sav’n Sun
TM
” DX Reservoir:
1.)
Open fill valves “A” and “B”
2.)
Open gate valve “A” and close gate valve “B”
3.)
Attach hose to fill valve “A”
4.)
Fill reservoir to the top of the site glass
5.)
Shut off fill valves “A” and “B”
6.)
Remove fill hose
7.)
Open gate valve “B”
Draining the “Sav’n Sun
TM
” DX Reservoir
1.)
Shut off controller and wait until all water is
back in reservoir
2.)
Attach hose to fill valve “A”
3.)
Open fill valve “B”
4.)
Open fill valve “A” (fill valve “B” MUST be
open first)
When filling the potable water side of the DX
system be sure to open the hot water faucet in the
bath tub to release the air from the system.
17.
DRAINBACK DX START-UP
After installation and final inspection, the system
should be filled and checked for leaks for ½ hour.
(see Figure 20). To charge the system:
a)
Connect hose to fill valve A.
b)
Open fill valves A and B.
c)
SLOWLY Fill the system with water until
water reaches to the top of the site glass.
d)
Close fill valves A & B.
e)
Turn on pump and let run for 5 minutes
f)
Check for leaks at collectors and in attic.
g)
Switch controller to automatic mode.
If the sun is shining and the tank is cool, the pump
should turn on and the water should circulate. The
return lines from the collectors should be hotter than
the inlet lines and the collector glass should be
slightly warmer than ambient temperature.
18.
DRAINBACK DX MAINTENANCE
Maintenance of a drainback system is minimal. The
storage tank should be partially drained every 6
months to allow minerals to be removed preventing
scale build up (this is recommended for all water
heaters).
The collector glass should be kept clean for best
system performance. Rain water will usually
suffice, but a garden hose can be used during dry,
dusty weather.
