Operation; Trouble Shooting - Xylem GOULDS V100 Manuel D'instructions

BEFORE PUMPING WATER INTO YOUR SYSTEM:
1. Verify your tanks standing air pressure:
• record here:
2. Determine the pumps cut-in pressure setting:
• record here:
3. Adjust tanks pre-charge air pressure:
• 2-3 PSIG (below) cut-in pressure setting of pump.
• record here:
IF YOU THINK YOU HAVE A PROBLEM WITH YOUR WATER
SYSTEM TANK, YOU SHOULD MAKE THE FOLLOWING
TESTS AND OBSERVATIONS BEFORE YOU CALL YOUR
PROFESSIONAL DEALER.
1. Observe water system operation and note any unusual
occurrence such as water spurting from a faucet rather than
a steady flow (indicates air in the system) or short cycling of
the pump (rapid starts and stops).
2. In the event that evidence of a small leak near the water fitting
appears, check at elbow. The introduction of cold water to
a warm tank may form condensation especially in warmer
climates. It is important to provide adequate drainage.
3. The tank drawndown is governed by the air pressure in the tank
and the cut-in and cut-out pressure settings on the pressure
switch. If you have concerns about the drawndown, you should
check those settings as follows:

OPERATION

PSIG (as received new)
PSIG (switch)
PSIG (active tank).

TROUBLE SHOOTING

4. Release air or add air to the tank to make the pressure in the
tank 2-3 psig LESS than the pump cut-in pressure setting.
5. It will be necessary to expel air from the piping system
on new installations. To do this open all faucets and turn on
the pump. Observe that a mixture of water and air will sputter
from the faucet. Run the system until a steady flow of
water exists. Open and close the faucets several times to
assure that all air has been removed. If streams do not
become steady, an air leak may exist. Check for leaks on
suction side piping.
6. It may be necessary to make final adjustments on the system
pressure switch setting because at times the actual pressure
switch setting will vary from what is stated on the cover. Such
variation, though not harmful, could cause a momentary lag of
water delivery. To make this adjustment follow these steps:
a. Fill the system until the pump shuts off.
b. Open a faucet and drain water system tank until pump starts.
c. If there is a pause in water flow from time water system tank is
emptied and pump starts up again, decrease air pressure in tank
until it is 2 to 3 psig below cut-in pressure setting. See Trouble
Shooting section 3(a-b) for procedure.
d. Close the faucets and refill the watersystem tank. Repeat
steps (b) and (c) if necessary until there is no longer a
pause in water flow.
a. Air charge in Tank. Turn off electric power to the pump.
Open a nearby faucet and drain the tank completely. Check
the pressure in the water system tank using a standard,
high quality tire gauge. If the air pressure in the tank is
not approximately 2-3 psi below the pump cut-in setting,
tank pressure must be adjusted by a qualified professional.
Replace the valve stem cap. For suspected air leakage
soapy water can be used to check the air valve and tank
seams for leaks. If a tank leak appears replacement by a
qualified professional is required.
b. Pressure Switch Setting. Start the pump allowing system
pressure to build until cut-off setting is reached (note gauge
pressure once pump stops). Then open faucet draining tank
down until cut-in setting is reached (note gauge pressure
once pump starts). The proper pressure differential would
be 20 psi (not exceeding 25 psi). If your system pressure
is not maintaining a proper differential you should contact
a qualified professional for service.
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