Overview; Product Description; Operation - Lowara GXS20 Installation And Operating Instructions Manual

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1. Overview

The pressure booster sets, GXS20, GMD20, GMS20 series, are designed to transfer and boost clean
Operating limits
Fluid temperature:
Ambient temperature:
Operating pressure:
Minimum inlet pressure:
Maximum inlet pressure:
Starts per hour:
WARNING

2. Product Description

The pressure booster set consists of two identical electric pumps connected in parallel and mounted on
a common stand, suction and delivery manifolds, on-off valves, check valves, pressure gauge, pressure
switches, sensors and a single-phase or three-phase control panel.
The system must be equipped with a membrane tank. The delivery manifold
designed for installation of 24-litre tanks with on-off valve. Along with the tanks, provide a suitable mani-

3. Operation

If the water demand increases, the pressure drops until it reaches the second start value, determining
GXS20 Single-Phase Version
The GXS20 single-phase version can comprise:
a) Q-SMART panel: read the 001085042 installation and operating instructions
b) QXS20 panel: read the following instructions.
- Automatic sequential pump regulation with low-pressure control from two pressure switches
- Cyclic changeove
- Changeover lock selector switch
- Delay to prevent simultaneous start-up
- Thermal-magnetic switch for short-circuit protection
- erload protection via a motor protector incorporated in the motor
- Dry running protection via a pressure switch or
(accessory electrodes not included)
- Dry running protection cut-in timer
- Shut-down delay timers on both pumps
14
0°C to +40°C, +60°C depending on the type of pump
0°C to +40°C, +45°C, +50°C depending on the type of pump
Max 8 bar, 10 bar, 16 bar depending on the type of pump (see instruc-
tions handbook)
According to NPSH curve and
The inlet pressure plus the pressure supplied by the pump against the
closed valve must always be lower than the maximum operating pressure
Max 60 up to 3 kW, max 40 from 4 kW
Limitations to uid temperature and pressure may be imposed by the membrane
rst pump to be started
resistance; level should be raised by
at switch or level sensors with sensitivity adjustment
with two couplings