GPT 20-40 Quick Start Manual

Guide and Manual for Installation of Pressure Switch
If you have Pressure Tank, you must adjustment the air pressure of your
tank 2 psi less than minimum of pressure that you done adjustment for
your Pressure Switch
(please attention the table for sample) .
Ignoring this important reminder and not adjusting the air pressure of the
pressure tank, may cause issues in system
ATTN: The installation of this electric switch must be done by qualified and
licensed persons to install electrical appliances
After checking the items announced above and installing the Pressure switch correctly on the pump or
pipe, open the cover of Pressure switch and connect the pump wires as well as the network power
wires, and ground wires as shown (make sure the wires retaining screws are tight)
After checking the correct Installing of the pump to the piping system and the controlled the one-way
valve, as well as installing a pressure tank and pressure gauge, you can connect the mains plug to the
socket of power network (note that the mains voltage must be the same as the required pump
voltage)
Your pump turns on and then you must close the consumption valves after a few moments so that the
pump can cut off the network power by pressing the necessary pressure.
Note: when the pressure goes up and the power cut, please attention the pressure from the
manometer and write the pressure of cut. At this time, open one of the waters taps to reduce the
pressure and the pump will start working.
Note the pressure to restart the pump on the manometer, and write
If these pressures are in accordance with your opinion, disconnect the plugs from the socket and close
the Pressure cover, but if it is not according to your request, you can increase or decrease your desired
pressure up to 20 psi.
Note the picture of the pressure adjusting screws. The long screw (1) is for increasing or decreasing the
pump shut-off pressure. The short screw (2) is for adjusting the pump restart pressure
By turning the nut on the long screw in a clockwise direction, the spring is more compact, and the
pump cut-off pressure increases, and if it is turned counterclockwise, the pump cut-off pressure
decreases.
Switch PSI Air
Model Pressure
in Tank
20-40 18
30-50 28
40-60 38
50-70 48
60-80 58
70-100 68