Installation
INSTALLATION & SERVICE INFORMATION
FLOJET Industrial Pumps are designed for a wide range of applications and are constructed from a selectionof materials
suitable for handling a broad range of chemicals. Fluids being pumped must be compatible with the materials of construc-
tion. Consult factory or website for Chemical Compatibility Guide. The diaphragm pumps are self-priming and can be run
dry without harm. They are intended for intermittent duty cycles but can be run continuously for short periods of time. The
higher the duty cycle the shorter the expected life of the pump. Typical pump uses are liquid transfer, spraying, cooling,
circulation, filtration and dispensing.
Liquid Temperature Range: 40° F (4° C) Min -140° F (60° C) Max
PLUMBING
Use flexible hose of the correct pressure rating that is compatible with the fluid to be pumped. Tubing should be a minimum
of 1/2” (13.0 mm) ID and at least 20 inches (508 mm) in length to avoid excess stress on the pump ports. Do not crimp or
kink the tubing.
OPERATION
To start and prime the pump, the discharge line must be open allowing trapped air to escape thus avoiding the potential
of airlock. The pressure switch will shut off the pump automatically when the discharge valve is closed and the pressure has
risen to the switch OFF set point. The pressure switch will restart the pump when a valve is opened and the discharge line
pressure drops to the ON set point of the pressure switch.
Models equipped with an external bypass system are designed to pump at high pressures while at low or high flow rates.
Models equiped with bypass only must be turned off/on manually, or by an independent control device. Models equipped
with a bypass only will continue to run until the power is turned off.
DEMAND OPERATION (INTERMITTENT DUTY)
Demand Operation is considered an “intermittent duty” application. The maximum intermittent duty cycle is that which
will cause the motor to reach its maximum thermal limits. Once the maximum thermal limit is reached, the motor must be
allowed to settle to a lower temperature ideally being ambient before resuming operation. Running the pump at or near
the maximum thermal limit for extended period of time will shorten the life of the pump and may result in immediate
pump failure.
MOUNTING
FLOJET Quad/Triplex/Duplex Series pumps are self-priming. Vertical prime may vary depending on the fluid viscosity, suc-
tion tube size, foot valve and pump configuration. The pump should be mounted in a dry and adequately ventilated area. If
mounted within an enclosure, provisions to cool the motor may be necessary. Flojet ports are a push in type retained by a
“C” clip. To install the ports move “C” clips to rear of pump.
Push the port until snug. Slide “C” clip forward to front of pump. Do not install pump such that plumbing causes excessive
stress on either port. The use of check valves in the plumbing system could interfere with the priming ability of the pump.
If a check valve is installed in the plumbing it must have a cracking pressure of no more than 2 PSI (.14 bar). Use of a mini-
mum 40-mesh strainer or filter in the pump inlet line will prevent foreign debris from entering the system. Failures due to
foreign debris entering the pump will not be covered under the limited warranty.
Note: Inlet pressure must not exceed 30-PSI (2.1 bar) maximum.
ELECTRICAL
The pump should be wired into an individual (dedicated) circuit, controlled with an UL/C-UL certified double pole switch
rated at or above the fuse ampere indicated on the pump motor label.
On 120-volt AC pumps, the black wire lead is live or common, the white lead wire is neutral and the green/ yellow is ground.
On 240-volt AC pumps the brown wire lead is live or common, the blue wire is neutral and the green/yellow is ground.
On 12 and 24 volt DC pumps, the red lead is positive and should be connected to the battery plus (+) terminal. The black
lead is ground and should be connected to the battery minus (–) terminal. Improper duty cycle and/or rapid start stop
conditions caused by undersized spray nozzles will cause the internal thermal breaker (if equipped) to trip, or can cause
premature motor failure due to excessive heat.
PREVENTATIVE MAINTENANCE TIPS
If pumping a liquid other than water the pump should be flushed with water (if applicable) after each use.
Do not assume chemical compatibility. If the fluid is improperly matched to the pumps elastomers, the pump may fail to
prime, have low pressures or the pressure switch may not shut off.
