Section Ii. Troubleshooting - Pentair Ultra-Flow Serie Manual De Uso

E. THE SHAFT SEAL.
1. The Shaft Seal consists primarily of two parts, a rotating member and a ceramic seal.
2. The pump requires little or no service other than reasonable care, however, a Shaft Seal may occasionally become damaged
and must be replaced.
The polished and lapped faces of the seal could be damaged if not handled with care.
In mild climate area, when temporary freezing conditions may occur, run your filtering equipment all night to prevent
freezing.

SECTION II. TROUBLESHOOTING.

A. FAILURE TO PUMP.
1. Pump will not prime - too much air. - Remedy:
a. Check suction piping and valve glands on any suction gate valves.
b. Secure lid on pump strainer pot and make sure lid gasket is in place.
c. Check water level to make sure skimmer is not drawing air.
2. Pump will not prime--not enough water. - Remedy:
a. Make sure suction lines, pump strainer, and pump
volute are full of water.
b. Make sure valve on suction line is working and
open, (some systems do not have valves).
c. Check water level to make sure water is available
through skimmer.
3. Pump strainer clogged. - Remedy:
a. Clean pump strainer pot.
4. Pump strainer gasket defective. - Remedy:
a. Replace gasket.
B. REDUCED CAPACITY AND/OR HEAD.
1. Air pockets or leaks in suction line. - Remedy:
a. See item A.1. of this section, above.
2. Clogged impeller. Remedy:
a. Turn off electrical power to the pump.
b. Remove the clamp that holds the volute to the seal
plate.
c. Slide the motor and seal plate away from the
volute.
d. Clean debris from impeller. If debris cannot be
removed, complete the following steps.
(1) Remove left hand thread anti-spin bolt and
O-ring.
(2) Remove, clean and reinstall impeller.
(3) Reinstall anti-spin bolt and O-ring.
e. Reinstall weir-ring, diffuser, and O-ring.
f. Reinstall motor and seal plate into volute aligning
with keyway at top of volute.
g. Reinstall clamp around seal plate and volute and
tighten securely.
3. Pump strainer clogged. - Remedy:
a. Clean suction trap.
P/N • Núm/Pte. • Réf. 99340000
CAUTION
CAUTION
110
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0 10 20 30
A = ½ hp full rated or ¾ hp up rated
B = ¾ hp full rated or 1 hp up rated
C = 1 hp full rated or 1½ up rated
D = 1½ full rated or 2 hp up rated
E = 2 hp full rated or 2½ up rated
F = 3 hp full rated
4
UF Performance Curves
NSF Listed Pumps
E
D
A
B C
40 50 60 70 80 90 100 110 120 130 140 150
FLOW IN GPM
Performance Curves
G
H J
40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
FLOW IN GPM
G = ¾ hp UR High Flow
H = 1 hp UR High Flow
J = 1½ hp UR High Flow
K = 2½ hp UR High Flow
Rev. G • Rev. G • Rév. G
F
K
4-3-00