B
A
E
D
C
F
START
STOP
START
STOP
470
450
- 7 -
The pump must never run dry, needing a minimum water depth of 90 mm on the
Supersub model and 100 mm on the Supervort models, at all times.
Adjustment of the float switch is achieved by lengthening or shortening the cable
through the moulded cable retention slot, which is located in the pump handle (Figs 6 and
7).
Note: When inserting cable into slot ensure it is fully engaged.
If modification of the level setting is required refer to Figures 8 and 9 and the following
chart.
Use of a Stuart non-return valve, Part No 26702 is recommended on the discharge side
to limit back flow and pump surging when draining small areas.
If the pump is required to drain, for instance, a cellar, then it must be installed in a
sump, having sufficient dimensions for the float switch to operate freely (Fig. 10), retaining
a minimum water depth as previously stated. The pump is continuously rated when fully
submerged but should only be run for short periods (10 mins) when the water drops to the
minimum level. The number of starts should not exceed 30 per hour.
Note: It is not possible to empty the sump completely, a minimum depth must remain
(Figs. 8 & 9).
Fig. 8 Min. Float
Switch Movement
Fig. 9 Max. Float
Switch Movement
Fig. 10 Min. Size Of Sump
Chart shows min. and max. float switch adjustment
Pump handle
Moulded
cable
retention slot
Float switch
cable shown
slotted into
position
Fig. 6
Fig. 7
A
B
C
D
E
F
PUMP TYPE
START
(MIN.ADJ)
STOP
(MIN.ADJ)
CABLE
(MIN.ADJ)
START
(MAX.ADJ)
STOP
(MAX.ADJ)
CABLE
(MAX.ADJ)
SUB 460A
VORT 550A
VORT 560A
400
410
440
200
190
230
220
220
220
480
460
490
90
100
100
350
320
330