Tank And Pipe Sizing - Franklin Electric SubDrive15 Manuel D'utilisation

SubDrive/MonoDrive

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.
Table 3: Minimum Pressure Tank Size (Total Capacity)
Pump Flow Rating
Less than 12 gpm (45.4 lpm)
12 gpm (45.4 lpm) and higher
The pressure tank pre-charge setting should be 70% of the system pressure sensor
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).
WARNING
Submersible pumps can
develop very high pressure
Pump
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.
Motor
20
Accessories
Pressure Sensor Kit - replacement sensor with 10 ft of 22 AWG cable and sensor adjustment tool: 223 995 901
(SubDrive75/100/150, MonoDrive, MonoDriveXT, SubDrive2W)
Sensor Cable Kit - 100 feet of 22 AWG pressure sensor cable: 223 995 902
(SubDrive75/100/150, MonoDrive, MonoDriveXT, SubDrive2W)
SubDrive15 or MonoDrive
SubDrive20
SubDrive30 or MonoDriveXT
SubDrive15 or MonoDrive
SubDrive20
SubDrive30 or MonoDriveXT
The pressure tank pre-charge setting should be 70%
of system pressure sensor setting.
Pressure sensor must be installed
in the upright and vertical position
with the rubber boot installed.
Pressure
Sensor
6 ft (1.83 m) max
Pressure Gauge
Pressure
Drain Valve
Relief Valve
(Discharge into drain
rated for max pump
output at relief pressure.)
Turn right (clockwise)
to increase pressure setting.
Turn left (counter clockwise)
to decrease pressure setting.
1/4 turn = 3 psi
Position the pressure sensor
between vertical (preferred)
and horizontal. Do not install
inverted. Not to be placed in
direct sunlight.
PRESSURE SENSOR
Controller Model
Table 4
Pressure Setting Guide
Pressure Sensor
)
Set Point (PSI
25
30
35
40
45
50 (Factory set)
55
60
65
70
75
80
7/32" Allen-wrench (provided) "
Pressure sensor (NSF61 rated)
factory preset for 50 psi
WARNING
The pressure sensor
supplied with this controller
must be set between 25
and 80 psi (1.7 and 5.5 bar)
only.
Minimum Tank Size
2 gallons (7.6 liters)
4 gallons (15.1 liters)
4 gallons (15.1 liters)
4 gallons (15.1 liters)
8 gallons (30.3 liters)
8 gallons (30.3 liters)
Table 5
Maximum Velocity 8 ft/sec. (2.4 m/s)
Min Pipe Dia
Pressure Tank
1/2"
Pre-charge (± 2 PSI)
18
3/4"
21
25
1"
28
32
1-1/4"
35
39
1-1/2"
42
46
2"
49
53
2-1/2"
56
Max GPM (lpm)
4.9 (18.5)
11.0 (41.6)
19.6 (74.2)
30.6 (115.8)
44.1 (166.9)
78.3 (296.4)
176.3 (667.4)