Solar System Design Guide
37
6020 457 - 01
Refer to the Solar-Divicon Installation and Service
Instructions Manual for detailed information on
sizing, installation and performance parameters.
Installation Accessories
Solar-Divicon Pump and Electrical Specification
Combination brass temperature gauge, flow check valve and isolation valves are located in the solar supply and solar
return lines.
■
Unload the check valves using a wrench, manually rotate valve assembly clockwise 45 degrees
■
Close or isolate the system using a wrench, manually rotate valve assembly clockwise 90 degrees
Pump Electrical Details
Solar-Divicon DN20B
Solar-Divicon DN25B
Model
Voltage
Phase
Frequency
Speed #1
Speed #2
Speed #3
Maximum Amperage Draw
Wilo Star S21 U-15-130
115 Vac
1 Ph
60 Hz
42 Watts
65 Watts
90 Watts
0.8 Amps
Wilo Star S30 U-25-180
115 Vac
1 Ph
60 Hz
92 Watts
142 Watts
180 Watts
1.5 Amps
Connection Types
Solar Supply Return Circuit
Solar Expansion Tank
Safety Relief Valve
Ø 3/4” Copper Type-L
(Locking Ring)
3/4” NPT (Female)
3/4” NPT (Female)
Ø 1” Copper Type-L
(Locking Ring)
3/4” NPT (Female)
3/4” NPT (Female)
Flow Meter Range
Minimum Flow Rate
Maximum Recommended System Flow Rate
Maximum Flow Rate
0.8 USG/min (3.0 L/min)
4.4 USG/min (16.7 L/min)
6.0 USG/min (22.7 L/min)
1.0 USG/min (3.8 L/min)
6.6 USG/min (25.0 L/min)
10 USG/min (37.9 L/min)
Pump Head Capacity
Maximum Head
20 ft (6.1 m)
29 ft (8.8 m)
Operating Conditions
Maximum Operating Temperature
Maximum Operating Pressure
230ºF (110ºC)
6 Bar (87 psi)
230ºF (110ºC)
6 Bar (87 psi)
Fluid Content
Internal Fluid Content
0.11 USG (0.40 L)
0.20 USG (0.75 L)
Maximum Collector Surface Area
Low Flow = 0.5 gal/ft²/hr (20 l/m²/hr)
High Flow = 1.0 gal/ft²/hr (40 l/m²/hr)
85,300 Btuh (25 kW)
42,650 Btuh (12.5 kW)
119,400 Btuh (35 kW)
59,700 Btuh (17.5 kW)
Maximum Recommended Number of Vitosol 200-FM Collectors
Low Flow = 0.5 gal/ft²/hr (20 l/m²/hr)
High Flow = 1.0 gal/ft²/hr (40 l/m²/hr)
14
7
20
10
