USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Page 19 of 36 MaxFlo VS Pump IS2303VSP2 Rev-B
6.2. Starting/Priming the Pump
Refer to item #9 in section 6.6 for priming time selection.
Fill strainer housing with water to suction pipe level. If water leakage occurs from anywhere on the pump or filter, DO
NOT start the pump. If no leakage occurs, stand at least 10 feet from pump and/or filter and proceed with starting
the pump.
WARNING – Return to filter to close filter manual air relief valve when a steady stream of water (not air or air
and water) is discharged from valve. Failure to do so could result in severe personal injury.
ATTENTION – NEVER OPERATE THE PUMP WITHOUT WATER. Water acts as a coolant and lubricant for the
mechanical shaft seal. NEVER run pump dry. Running pump dry may damage seals, causing leakage, flooding, and
voids warranty. Fill strainer housing with water before starting motor.
ATTENTION – Do NOT add chemicals to pool/spa system directly in front of pump suction. Adding
undiluted chemicals may damage pump and voids warranty.
ATTENTION – Before removing strainer cover:
1. STOP PUMP before proceeding.
2. CLOSE VALVES in suction and outlet pipes.
3. RELEASE ALL PRESSURE from pump and piping system using filter manual air relief valve. See filter owner’s
manual for more details.
4. Remove strainer cover and fill strainer housing with water.
5. Clean and lubricate strainer cover O-ring with "Jack's 327" if necessary.
6. Replace strainer cover on strainer housing.
7. OPEN VALVES in suction and outlet pipes.
Note: Tighten strainer cover lock ring by hand only (no wrenches).
Turn on power and wait for pump to prime, which can take up to ten (10) minutes. Priming time will depend on
vertical length of suction lift and horizontal length of suction pipe. If pump does NOT prime within 10 minutes, stop
motor and determine cause. Be sure all suction and discharge valves are open when pump is running. See
Troubleshooting Guide.
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