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Mounting:
Determine the optimum location for your pump.
1. The pump should be mounted in a dry place and away
from any source of heat. If an enclosure is used, special
instructions for cooling the motor may be necessary. Consult
the Factory.
2. Do not subject the pump to extreme high or low (freezing)
temperatures while in operation. (Operating ambient
temperature range is 32° F to 115°F).
3. The pump may be mounted horizontally with the outlet port on
the right when viewed from the pump end or with the pump
above the mount, or vertically with the pump above or below
the motor.
Plumbing:
1. Use suction hose on inlet of pump. We recommend use of
flexible tubing with proper pressure rating.
2. Pump will prime only if all pressure is relieved from outlet port.
3. It is recommended that pure water be pumped or an in-line
sediment filter (50 mesh) be installed at the inlet side to keep
foreign debris out of the system. If a check valve is installed
in the plumbing, it must have a cracking pressure of no more
than 2 psi (0.14 bar).
4. Avoid any sharp bends which may crimp tubing and restrict
flow. Use 90° elbow fittings if necessary.
5. The pump should always be mounted prior to any
components which could introduce particles to the water;
thus, preventing them from entering the pump chambers and
possibly causing clogging.
Electrical:
1. The 7800 series pumps are designed for intermittent duty.
Make sure that “OFF” periods are sufficient. Refer to Rapid
ON/OFF Operation. Consult the factory for particular data and
design criteria.
2. Be sure power supply used is adequate for the application.
3. Pump ratings are based off alternator charged battery which
supplies 13.7 volts.
4. Each single drop in voltage is a reduction in motor speed thus
reducing pump performance.
(1 volt decrease = 200-300 loss in RPM)
5. Higher operating flow and pressure increases amp draw.
Installation and Operation
Precautions:
1. The pump is equipped with a pressure sensing demand
switch that controls the maximum operating pressure.
2. In addition, never subject the pump to pressures above 125
PSI (8.5 bars).
3. As long as there is inlet water pressure, the pump will not stop
forward flow of water even if the motor is turned off. Be sure
the system has positive means of shutting off water supply.
4. Do not operate pump in an explosive environment. Arcing
from the motor brushes, switch or excessive heat from an
improperly cycled motor may cause an explosion.
5. Do not locate the pump motor near low temperature plastics
or combustible material. The surface temperature of the motor
may exceed 250°F (120°C).
6. Do not pump gasoline or other flammable liquids. Pump head
materials are designed for use with water only. Do not use
with petroleum products.
7. Do not assume fluid compatibility. If the fluid is improperly
matched to the pumps’ elastomers, a leak may occur.
8. To prevent electrical shock, disconnect power before initiating
any work. In the case of pump failure, the motor housing and/
or pump fluid may carry high voltage to components normally
considered safe. Therefore, always consider electrical shock
hazard when working with and handling electrical equipment.
If uncertain, consult an Electrician. Electrical wiring should only
be done by a qualified electrician per local and state electrical
codes.
Installation Recommendations
Installation and Operation
1. Turn off water supply.
2. Cut flexible tubing in sufficient length to avoid any stress on
the tubing where it connects to the pump or the fitting on any
accessory.
3. Insert tubing into pump ports. If fittings are John Guest type,
be sure tubing is inserted past the resistance point until it
bottoms out against the port stop. If compression fittings
with threaded nuts are used, insert tubing until it bottoms out
in the port and hand tighten the compression nut until the
connection is tight. Then use a wrench to tighten the nut 1/2
turn clockwise or follow the wrench tightening instructions
provided by the fitting manufacturer.
4. The pump is now ready for operation. Turn on water supply to
allow water to flow to the pump.
5. If the power source is a transformer, plug the appropriate
supplied/approved transformer into the receptacle and
connect the pump to the transformer. If the power source is
not a transformer, connect the pump to the appropriate power
source. Open the discharge or dispensing valve. Allow water
to circulate, purging any entrapped air.
6. The pump will now start building pressure. Operating pressure
will vary with flow rate, flow valve, feed-water pressure and line
voltage. Check for fitting leaks.
7. If compression fittings with threaded nuts are used, observe
any leaks after pump has run for approximately 15 minutes.
Further tighten compression nuts approximately 1/8 to 1/4
of a turn on all fittings in the system. Wait 15 minutes and
repeat the leak check. Note: Further adjustments should
not be necessary although it may take several days of
operation before all the air has been purged and the system is
stabilized.
8. Adjusting the Pressure Switch. Should the pressure switch
OFF setting vary with use and time to an unsuitable value,
it may be adjusted for optimum performance. Turn the
setscrew clockwise to increase the OFF pressure setting
and counter clockwise to decrease. The screw should not
be adjusted more than one half turn without consulting the
Factory. Excessive adjustment of the pressure switch could
cause low system pressure, rapid cycling ON/OFF operation,
and reduced pump and motor life. Damage may occur. The
Warranty does not cover improper adjustment of the pressure
switch.
Servicing:
Every Year: Check system against operating standards.
Every 2-3 Years: We recommend replacing the diaphragm
and checking against operating standards.
Troubleshooting Guide
Pump will not Start
Check:
•
Correct
voltage (±10%) and electrical connections
•
Fuse
or breaker
•
Pressure
switch operation and correct voltage at switch
or motor for open or grounded circuit
•
Locked
drive assembly
Pump will not Prime
(No discharge with motor running)
Check:
•
Debris
in strainer
•
Restriction
(kinks) in inlet/outlet tubes
•
Debris
or swelling in inlet/outlet valves
Pump will not Shut Off
(Output line closed and no leaks)
Check:
•
Air
trapped in outlet line or pump head
•
Correct
voltage to pump
•
Debris
in pump inlet/outlet valves
•
Loose
drive assembly or pump head screws
•
Pressure
switch operations/adjustments
Leaks from Pump Head or Switch
Check:
•
Loose
screws at switch or pump head
•
Switch
diaphragm ruptured or pinched
•
Punctured
diaphragm if
is present
Replacement Parts
7801,7811,7802,7812,7822
1
Lower Housing
............................................................................................................................................
1
7801/7811 Demand or Bypass ....................................................................................... LHA-7801
7802/7812 Demand or Bypass ....................................................................................... LHA-7802
7822/7823 Demand or Bypass ....................................................................................... LHA-7822
2
Valve Assembly
...........................................................................................................................................
1
7800 Series (all models) .................................................................................................. VHA-7800
3
Upper Housing
............................................................................................................................................
1
7801/7802/7822 Series w/Pressure Switch ...............................................................UHA-7802-PS
7801/7802/7822 w/Bypass ........................................................................................ UHA-7802-B
7811/7812/7832 Series w/Pressure Switch ...............................................................UHA-7812-PS
7811/7812/7832 Series w/Bypass .............................................................................. UHA-7812-B
4
Mounting Screws
.......................................................................................................................................
8-32 X 1” .......................................................................................................................... J78-051
4
10-32 X 1 1/2“ .................................................................................................................. J78-050
3
5
Complete Pump Head w/Threaded Ports
....................................................................................................
1
7811 w/Pressure Switch ............................................................................................. PH-7811-PS
7811 w/Bypass............................................................................................................. PH-7811-B
7812 w/Pressure Switch ............................................................................................. PH-7812-PS
7812 w/Bypass............................................................................................................. PH-7812-B
Complete Pump Head w/Quick Attach Ports
..............................................................................................
1
7801 w/Pressure Switch ............................................................................................. PH-7801-PS
7801 w/Bypass............................................................................................................. PH-7801-B
7802 w/Pressure Switch ............................................................................................. PH-7802-PS
7802 w/Bypass............................................................................................................. PH-7802-B
7822 w/Pressure Switch ............................................................................................. PH-7822-PS
7822 w/Bypass............................................................................................................. PH-7822-B
6
12 VDC Motor
.............................................................................................................................................
1
7800 Series w/Connector, No Switch, ............................................................................. M12-78B
7800 Series w/Switch and Connector ............................................................................... M12-78C
7
Pressure Switch
..........................................................................................................................................
1
7800 Series (all models) .................................................................................................7800-PSW
Item Description
Part Number
Qty
PowerFLO
™
7800 Series
PowerFLO
™
7800 Series
PowerFLO
™
7800 Series
Toll Free: 1-866-DELAVAN (335-2826) • Toll Free Fax: 1-888-726-5906 • delavanagpumps.com
Toll Free: 1-866-DELAVAN (335-2826) • Toll Free Fax: 1-888-726-5906 • delavanagpumps.com
