22
SubDrive Connect
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 2.4 m/s (8 ft/sec) (See Table 5 below for minimum pipe
diameter).
Tank and Pipe Sizing
The SubDrive needs only a small pressure tank to maintain constant pressure. (See table
3. below for recommended tank size.) For pumps rated 45 lpm (12 gpm) or more, a slightly
larger tank is recommended for optimum pressure regulation. The SubDrive can also use an
existing tank with a much larger capacity.
Pump Flow Rating
Controler
Model
Minimum Tank
Size
Less than 45.4 lpm
(12 gpm)
SubDrive1100
18 liters
SubDrive1500
18 liters
SubDrive2200
18 liters
45.4 lpm (12 gpm)
and higher
SubDrive1100
18 liters
SubDrive1500
30 liters
SubDrive2200
30 liters
Table 3: Minimum Pressure Tank Size (Total Capacity)
Table 4
Table 5
Pressure Setting Guide
Pressure Sensor
Set Point (bar)
Pressure Tank
Pre-charge (± 0,1 bar)
0.3
0.2
0.7
0.5
1.0
0.7
1.4
1
1.7
1.2
2.1
1.5
2.4
1.7
2.8
2
3.1
2.2
3.4
2.4
3.8
2.7
4.1
2.9
4.5
3.2
4.8
3.4
5.2
3.6
5.5
3.9
5.9
4.1
6.2
4.3
6.6
4.6
Maximum Velocity
2,4 m/s (8 ft/s)
Min Pipe Dia
max³/h
1/2"
1,1
3/4"
2,5
1"
4,5
1-1/4"
7,0
1-1/2"
10,0
2"
17,8
2-1/2"
40,0
SubDrive Connect System with analogue
pressure transducer (included in set)
SubDrive Connect System with pressure sensor
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
Position the pressure sensor
between vertical (preferred)
and horizontal. Do not install
inverted. Not to be placed in
direct sunlight.
Submersible pumps can
develop very high pressure
in some situations. Always
install a pressure relief
valve able to pass full pump
flow at 6.9 bar (100 PSI).
Install the pressure relief
valve near the pressure
tank and run to a drain
capable of full system flow.
WARNING
(Discharge into drain
rated for max pump
output at relief pressure.)
1/4-18 NPTF-2A
T
hread
Pressure Gauge
Pressure
Transducer
Pressure
Relief Valve
Drain Valve
Pump
Motor
1.83 m(6 ft) 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 = 0.2 bar
Pressure sensor
(NSF61 rated) factory
preset for 3.5 bar
Position the pressure sensor
between vertical (preferred)
and horizontal. Do not install
inverted. Not to be placed in
direct sunlight.
" 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 6.9 bar (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
(25 and 80 PSI)
WARNING
(Discharge into drain
rated for max pump
output at relief pressure.)
