Franklin Electric 5870205003C, Owner'S Manual

Page: 17 / 136

SubDrive/MonoDrive Connect
17
Pump Flow Rating Controller Model Minimum Tank Size
Less than 12 gpm (45.4 lpm)
SubDrive15 or MonoDrive 2 gallons (7.6 liters)
SubDrive20 4 gallons (15.1 liters)
SubDrive30 or MonoDriveXT 4 gallons (15.1 liters)
SubDrive50 8 gallons (30.3 liters)
12 gpm (45.4 lpm) and higher
SubDrive15 or MonoDrive 4 gallons (15.1 liters)
SubDrive20 8 gallons (30.3 liters)
SubDrive30 or MonoDriveXT 8 gallons (30.3 liters)
SubDrive50 20 gallons (75.7 liters)
The pressure tank pre-charge setting should be 70% of the system pressure setting as
indicated in Table 4. The minimum supply pipe diameter should be selected not to exceed a
maximum velocity of 8 ft/sec (2.4 m/s) (See Table 5 below for minimum pipe diameter).
Table 3: Minimum Pressure Tank Size (Total Capacity)
Pressure Gauge
Pressure
Transducer
Pressure
Relief Valve
Drain Valve
Pump
Motor
6 ft (1.83 m) max
The pressure tank pre-charge setting should be 70%
of system pressure setting.
Analog pressure transducer
must be installed in the upright
and vertical position.
PRESSURE SENSOR
Turn right (clockwise)
to increase pressure setting.
Turn left (counter clockwise)
to decrease pressure setting.
1/4 turn = 3 psi
Pressure sensor
(NSF61 rated) factory
preset for 50 psi
Position the pressure sensor
between vertical (preferred)
and horizontal. Do not install
inverted. Not to be placed in
direct sunlight.
7/32" Allen-wrench
(provided)
"
Submersible pumps can
develop very high pressure
in some situations. Always
install a pressure relief
valve able to pass full pump
flow at 100 PSI. Install the
pressure relief valve near
the pressure tank and run
to a drain capable of full
system flow.
WARNING
The pressure sensor
supplied with this controller
must be set between 25
and 80 psi (1.7 and 5.5 bar)
only.
WARNING
(Discharge into drain
rated for max pump
output at relief pressure.)
Pressure Sensor
Set Point (PSI)
5
10
15
20
25
30
35
40
45
50 (Factory set)
55
60
65
70
75
80
85
90
95
Pressure Tank
Pre-charge (± 2 PSI)
4
7
11
14
18
21
25
28
32
35
39
42
46
49
53
56
60
63
67
Pressure Setting Guide Maximum Velocity 8 ft/sec. (2.4 m/s)
Min Pipe Dia. Max GPM (lpm)
1/2" 4.9 (18.5)
3/4" 11.0 (41.6)
1" 19.6 (74.2)
1-1/4" 30.6 (115.8)
1-1/2" 44.1 (166.9)
2" 78.3 (296.4)
2-1/2" 176.3 (667.4)
Table 4 Table 5
Tank and Pipe Sizing
The SubDrive/MonoDrive needs only a small pressure tank to maintain constant pressure.
(See table below for recommended tank size.) For pumps rated 12 gpm (45.4 lpm) or more,
a slightly larger tank is recommended for optimum pressure regulation. The SubDrive/
MonoDrive can also use an existing tank with a much larger capacity.