Flotec FP2521, Owner'S Manual

Page: 4 / 44

For parts or assistance, call Flotec Customer Service at 800-365-6832
Installation 4
For a pump at sea level mounted directly over the well, be
sure the total lift from the pumping water level to the
pump does not exceed 20 feet. This will be less if the
pump is offset from the well.
The maximum lift of any pump decreases at the rate of
about 1’ less lift for every 1,000 feet of elevation above
sea level. For example, at Denver, Colorado (Elev. 5,000’)
the pump loses five feet of lift. The maximum depth from
which it would pump water would therefore be 15 feet.
Plastic Pipe
Plastic Pipe
Foot Valve
and Strainer
Coupling
Well Seal
Dug or Cased Well
611 1293
Figure 2B
Pump/Tank Installation
Pump
NOTICE: Use PTFE pipe thread sealant tape or a PTFE-
based pipe joint compound for making all pipe-thread
connections to the pump itself. To avoid stress-cracking,
do not use pipe joint compounds on the pump.
1. Wrap male pipe threads being attached to pump with
one or two layers of PTFE pipe thread sealant tape.
Cover entire threaded portion of pipe.
2. Do not overtighten threaded fittings in the plastic
pump. Be sure you do not try to tighten joint past
thread stop in pump port!
3. If leaks occur, remove fittings, clean off old tape,
rewrap with two to three layers of tape and remake
the connection. If joint still leaks, replace the fittings
(fittings may be undersized).
4. Be sure to support all piping connected to the System.
Horizontal Piping from Well to Pump
When the pump is offset more than 25 feet from the well,
horizontal suction pipe size should be increased to
reduce friction losses. Never install a suction pipe that is
smaller than the suction tapping of the pump.
1-1/4" 1-1/2" 2"
Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft.
Discharge Pipe Sizes
When the pump is some distance from the house or point
of water use, the discharge pipe size should be increased
to reduce pressure losses caused by friction.
1" 1-1/4" 1-1/2"
Up to 25 Ft. 25 to 100 Ft. 100 to 600 Ft.
Tank
Tanks are pre-charged with 25 PSI air pressure at the
factory. Your tank requires an air charge of 28 pounds per
square inch (PSI) for proper operation; check tank
pressure with tire gauge to determine if air charge needs
adjustment. Tank pre-charge should be checked annually;
see instructions at right.
In areas where the temperature is high for long periods of
time, the tank pre-charge pressure may increase. This may
reduce the tank drawdown (amount of water available per
cycle). If this occurs, reduce the pre-charge pressure to
two PSI below the pump cut-in setting of the pressure
switch (normally to 28 PSI).
It is necessary to flush all air out of the piping system and
water reservoir portion of the pre-charged tank. This is
required on new installations, pumps requiring repriming
and pumps that have been disassembled for service. Do
this as follows:
1. Open faucets furthest from tank and allow pump to
operate.
2. Air in the system will cause a sputtering flow; allow
faucets to run until you have a steady, air free stream.
3. Open and close faucets repeatedly until you are sure
all air has been removed.
4. If stream does not become steady, air may be leaking
into the system; check for leaks in the piping on the
suction side of the pump.
NOTICE: To prevent waterlogging, check tank air charge
annually.