Delavan 7800 Series - Manual (Page 3)

PowerFLO ™ 7800 Series
1228 Chestnut Avenue • Minneapolis, MN 55403 Delavan Ag Pumps
3
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