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Commissioning Start-Up, Operation, Shutdown - cont’d.
Start-Up, Operation, Shutdown
Before Starting the Pump
• Ensure all unnecessary personnel are clear of the area.
• For initial setup and test of your system, it is recommended to start with clean water instead of chemicals, and
confirm the system and plumbing connections are leak free.
• Ensure that there is fluid in the source tank or supply line. Do not run dry.
• Check line strainer for debris or clogs. Remove any found.
• Check all plumbing connections to make sure they are tight.
• Check power source and connections.
• Check that all valves and regulators are set to the desired setting and are functioning properly.
• Ensure all hoses are properly positioned and are not damaged in any way.
• Ensure PTO shaft shields are in place and are not loose.
Priming the Pump
To help prime the pump, keep the inlet or suction line as short as possible with a minimum of bends, elbows and kinks.
Make sure all connections are tight and do not leak air. Make sure line strainer is free of debris. If pump does not self-
prime, disconnect suction hose, fill with water and reconnect to liquid source. Often a squirt of oil into the ports of the
pump will seal clearances and help with priming.
Pumps Equipped with Only DC Motor
Startup and Operation
Prior to operation, make sure all discharge lines and hoses are secure, and not frayed, and there are no personnel
close to the pump. Make sure the tank valve / inlet line to the pump is open.
To start the pump, turn on main power switch to start the motor. Make sure pump is primed before proceeding. Adjust
pressure to reach desired spray output.
Duty Cycle
Duty cycle is the ratio of motor-on time to total cycle time in one hour. It is used to determine the acceptable level of
running time so that the thermal limits of the motor are not exceeded. Use the following equation and example to
determine Duty Cycle:
Duty Cycle = ON TIME / [Cycle ON TIME + (60 Minutes - Cycle ON TIME)] * 100.
(ON TIME cannot exceed 60 minutes.)
An example of a 75% Duty Cycle Motor is = 45/ [45+ (60-45)]*100 = 75% or 45 minutes on time per hour of operation
at maximum rated pressure and flow. ON TIME can be extended by reducing the maximum pressure the pump
operates at.
Duty cycle is affected by ambient temperature. If operating in extremely hot environments, duty cycles will decrease.
Do not run DC electric motors to an external operating temperature over 175º F (80º C), or the motor life will be
compromised.
Shutdown
To shut down the unit, first turn the switch or power supply off, then close all valves. If the pump will not be used for
several hours, it must be cleaned in accordance with the “Cleaning” section of this manual.
• If users of a Hypro roller pump are using a PTO shaft, flexible coupling or belt drive, they are required to use CE-
approved PTO shafts and guards.
• Hypro roller pumps should not be used if the ambient light is below 200lux.
• For roller pumps which use gas engines, the user should always ensure the exhaust is properly attached to
the engine and is not leaking.
Only use approved chemicals in your pump. For a complete list of approved chemicals, see the “Fluid
Pumping Applications” section. Failure to follow this warning will void your warranty and could lead to
property damage, serious injury or death.
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