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Figure 12: Vortex (L)
4. Fasten the impeller.
Impeller
Action
type
Non-clog
Hand-tighten the impeller screw enough to prevent
it from falling off.
Do not fasten the impeller until the clearance has
been adjusted in step
Vortex (H)
Fasten the impeller by tightening the impeller screw.
(M) (L)
Tightening torque: 22 Nm (16 ft-Ibs)
Tighten it a further 1/8 turn (45°).
5. Depending on type of impeller, do the following:
Impeller type
Action
Non-clog
Fit the suction cover, see step
Vortex (H) or (M) Fit the suction cover, see step
Vortex (L)
Fit the pump housing, see step
6. Fit the suction cover:
a) Lubricate the suction cover screws.
b) Place the suction cover on the pump housing and fit the screws.
c) Tighten the screws in a diagonal sequence.
Tightening torque: 9 Nm (6.6 ft-lbs)
d) Check that the impeller rotates freely.
7. Fit the pump housing:
a) Lubricate the pump housing screws.
b) Raise the drive unit.
c) Place the drive unit into the pump housing.
d) Tighten the screws in diagonal sequence.
Tightening torque: 22 Nm (16 ft-Ibs)
8. Adjust the clearance.
Impeller
Action
type
Non-clog
Adjust the clearance between the lower edge of the
impeller and the pump housing by sliding the impel-
ler on the shaft until it touches the pump housing.
Vortex
No adjustment or clearance check is needed. Go to
step
10
on page 15
GFK-GFV Series Installation, Operation, and Maintenance Manual
8
on page 15.
6
on page 15.
6
on page 15.
7
on page 15.
A
The clearance (A): 0.2–0.8 mm (0.008–0.032 in.)
9. If Non-clog impeller: Fasten the impeller.
a) Fasten the impeller by tightening the impeller screw.
Tightening torque: 22 Nm (16 ft-Ibs)
Tighten it a further 1/8 turn (45°).
b) Check the clearance (A) between the impeller and the pump
housing.
A: 0.2–0.8 mm (0.008–0.032 in.)
10.Check that the impeller can rotate freely.
WARNING: Crush Hazard
Beware of the pinch point hazard between the rotating
impeller and the guide pin.
7 Troubleshooting
Introduction
DANGER: Electrical Hazard
Troubleshooting a live control panel exposes personnel to
hazardous voltages. Electrical troubleshooting must be done
by a qualified electrician.
Follow these guidelines when troubleshooting:
• Disconnect and lock out the power supply except when conducting
checks that require voltage.
• Make sure that no one is near the unit when the power supply is re-
connected.
• When troubleshooting electrical equipment, use the following:
– Universal instrument multimeter
– Test lamp (continuity tester)
– Wiring diagram
7 Troubleshooting
15
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