Sandpiper S07 Manuel d'utilisateur télécharger pdf (Page 11)

s07nmdl1sm-rev0614 Models S07 Non-Metallic Page 9

TROUBLESHOOTING

Possible Symptoms:

• Pump will not cycle.

• Pump cycles, but produces no ow.

• Pump cycles, but ow rate is

unsatisfactory.

• Pump cycle seems unbalanced.

• Pump cycle seems to produce

excessive vibration.

What to Check: Excessive suction lift

in system.

Corrective Action: For lifts exceeding

20 feet (6 meters), lling the pumping

chambers with liquid will prime the

pump in most cases.

What to Check: Excessive flooded

suction in system.

Corrective Action: For flooded

conditions exceeding 10 feet (3 meters)

of liquid, install a back pressure device.

What to Check: System head exceeds

air supply pressure.

Corrective Action: Increase the

inlet air pressure to the pump. Most

diaphragm pumps are designed for 1:1

pressure ratio at zero ow.

What to Check: Air supply pressure or

volume exceeds system head.

Corrective Action: Decrease inlet

air pressure and volume to the

pump as calculated on the published

PERFORMANCE CURVE. Pump is

cavitating the uid by fast cycling.

What to Check: Undersized suction

line.

Corrective Action: Meet or exceed

pump connection recommendations

shown on the DIMENSIONAL

DRAWING.

What to Check: Restricted or

undersized air line.

Corrective Action: Install a larger

air line and connection. Refer to air

inlet recommendations shown in your

pump’s SERVICE MANUAL.

What to Check: Check ESADS, the

Externally Serviceable Air Distribution

System of the pump.

Corrective Action: Disassemble and

inspect the main air distribution valve,

pilot valve and pilot valve actuators.

Refer to the parts drawing and air valve

section of the SERVICE MANUAL.

Check for clogged discharge or closed

valve before reassembly.

What to Check: Rigid pipe connections

to pump.

Corrective Action: Install flexible

connectors and a surge suppressor.

What to Check: Blocked air exhaust

mufer.

Corrective Action: Remove mufer

screen, clean or de-ice and reinstall.

Refer to the Air Exhaust section of your

pump SERVICE MANUAL.

What to Check: Pumped uid in air

exhaust mufer.

Corrective Action: Disassemble

pump chambers. Inspect for diaphragm

rupture or loose diaphragm plate

assembly. Refer to the Diaphragm

Replacement section of your pump

SERVICE MANUAL.

What to Check: Suction side air

leakage or air in product.

Corrective Action: Visually inspect

all suction side gaskets and pipe

connections.

What to Check: Obstructed check

valve.

Corrective Action: Disassemble the

wet end of the pump and manually

dislodge obstruction in the check valve

pocket. Refer to the Check Valve

section of the pump SERVICE MANUAL

for disassembly instructions.

What to Check: Worn or misaligned

check valve or check valve seat.

Corrective Action: Inspect check

valves and seats for wear and proper

seating. Replace if necessary. Refer

to Check Valve section of the pump

SERVICE MANUAL for disassembly

instructions.

What to Check: Blocked suction line.

Corrective Action: Remove or ush

obstruction. Check and clear all suction

screens and strainers.

What to Check: Blocked discharge

line.

Corrective Action: Check for

obstruction or closed discharge line

valves.

What to Check: Blocked pumping

chamber.

Corrective Action: Disassemble

and inspect the wetted chambers

of the pump. Remove or flush any

obstructions. Refer to the pump

SERVICE MANUAL for disassembly

instructions.

What to Check: Entrained air or vapor

lock in one or both pumping chambers.

Corrective Action: Purge chambers

through tapped chamber vent plugs.

PURGING THE CHAMBERS OF AIR

CAN BE DANGEROUS! Contact the

Warren Rupp Technical Service Team

before performing this procedure. A

model with top-ported discharge will

reduce or eliminate problems with

entrained air.

If your pump continues to perform

below your expectations, contact your

local Warren Rupp Distributor or factory

Technical Service Team for a service

evaluation.

WARRANTY

Refer to the enclosed Warren Rupp

Warranty Certicate.

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Sandpiper S07 Manuel d'utilisateur Page 11

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