Craftsman 390.2509 Owner's Manual page 4

INSTALLATION
PUMP/TANK INSTALLATION
Pump
NOTICE: Use Teflon tape supplied with the pump or Plasto-Joint Stik _
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 Teflon 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, ff 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, hori-
zontal 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.
1-114" 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 " 1-114" 1-1/2"
Up to 25 Ft. 25 to 100 Ft. 100 to 600 Ft.
'Lake Chemical Co., Chicago, IlIinois
Tank
Tank is pre-charged with 40 pounds per square inch (PSI) air pres-
sure at the factory. Your tank requires an air charge of 30 PSI for
proper operation; check tank pressure with tire gauge to deter-
mine if air charge needs adjustment. Tank pre-charge should be
checked annual!y; 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, re-
duce the pre-charge pressure to match the pump cut-in setting of
the pressure switch (normally 30 PSI).
It is necessary to flush aL! 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 sys-
tem; check for leaks in the pipio_ on the suction side of the pump.
NOTICE: To prevent waterlogging, check tank air charge annually.
To Check Tank Air Charge
If drawdown (amount of water available per cycle) decreases sig-
nificantly, check as follows:
1. To check air charge in tank, shut off electric power to pump,
open faucet near tank, and drain completely.
2. At the air valve in top of tank, check air pressure with standard
tire gauge. Air pressure should be the same as the turn on pres-
sure of the pressure switch (30 PSI).
3. If the air pressure is below 30 PSI, add air to the tank. Use an
air compressor or a portable air storage tank.
4. Use soap or liquid detergent to check for air leaks around air valve.
Continuous b_ _ a lealc If necessary, install new core in
air valve. This is tiae same as those used for amons3b_le tabeless tires.
1.
1 2
Tank nearly empty - air expands filling area above vinyl sep-
arator.
2. Water begins m enter tank - air is compressed above sepa-
rator as it fills with water.
x-d L_d X_d "_d
3 4 5
4. Water being drawn from tank - compressed tank air forces
water out of separator.
5. Separator completely empty - new cycle ready to begin.
3. Pump-up cycle completed - air now compressed to cut off
setting of pressure switch.
Figure 3
Pump
Model
390.2509
TABLE I - PUMP PERFORMANCE (In Gallons per Minute)
NOTE: This system is designedfor pumping depths of 20 feet or less.
Discharge Pumping Depth in Feet
Description Suct. Disch, Pressure PSI 5' 10' 15' 20'
112HP S.W. Jet 1-1/4" 3/4" 40 7.3 6.2 5.2 4.2
4