Reefe VSRM Series - 3. Installation and Operation Instruction; 3.1 Mandatory Installation Requirements; 3.2 Pipe Size and Pressure Impact; 3.3 Pressure Setting Considerations

Page | 4 Ascento 37 Export St Lytton QLD PH: 1800 807 604 | VSRM Inverter Contant Pressure Pumps | V2016.12
3. Installation and Operation instruction
IMPORTANT NOTICES: READ BEFORE INSTALLATION
3.1 IMPORTANT MANDATORY INSTALLATION REQUIREMENTS:
1. IMPORTANT: a Check-Valve must be installed in the inlet pipe
2. IMPORTANT: Install using Barrel-Union connections for easy removal for repair or servicing. Install a Y-Strainer or
Pre-Filter and also a Ball-Valve on the inlet piping. REFER to the Diagrammatic Instructions for more information. No
warranty applies if these are not fitted according to the instructions.
3. IMPORTANT: Pressure setting in the Pressure Tank MUST be changed, once the OPERATING PRESSURE is
decided/set. Firstly set the OPERATING PRESSURE (“Setting” on the keypad), then adjust the pressure in the
PRESSURE TANK, recommended to be set at 50% to 70% of the OPERATING PRESSURE (“Setting” on the keypad)
3.2 IMPORTANT NOTE: Pressure of the water at the discharge (taps, showers, irrigation etc) is affected by the pipe
size. The SMALLER your pipes, the LOWER the pressure will be at discharge. Example: 13mm ID pipe over 20 metres
at 30Lpm will reduce pressure at discharge by 240kPa (2.4bar) - whereas if 25mm ID pipe is used for 20 meters at
30Lpm it only reduces pressure by a miniscule 10kPa. Smaller pipe also means that more power will be used as the
pump has to work harder to overcome the extra back-pressure from small pipes. A small short-term saving (in the
cost of the pipes) will become a long-term liability.
Model
Pump Inlet
Size
Inlet Pipe (Suction
Pipe) ID
Pump Outlet
Size
Discharge Pipe ID
VSRM38-72
25BSP
25 - 32mm
25BSP
20 - 25mm
VSRM48-72
25BSP
25 - 32mm
25BSP
20 - 25mm
VSRM39-102
32BSP
32 - 40mm
25BSP
25 - 32mm
VSRM58-102
32BSP
32 - 40mm
25BSP
25 - 32mm
VSRM50-270
40BSP
40 - 50mm
40BSP
32 - 40mm
The larger size is recommended for best performance.
Pipe sizes are ID (Internal Diameter). We do not recommend 18mm Copper pipe is used for the main discharge for
these pumps – we recommend the larger sizes as per the chart above, is used for the main supply lines – smaller
pipes then can be used to connect to the fixtures.
3.3 IMPORTANT NOTE: The higher the Pressure setting (“Setting Pressure” on the pump control panel) the more
power you will use – set the pressure at the lowest pressure that is acceptable for the application. The
recommended setting is 65% of the max head pressure and the MAXIMUM setting is 80% of the max head pressure
(refer to the label on the pump and also the table below) IF THE PRESSURE IS SET TOO HIGH THE PUMP WILL RUN
CONTINUOUSLY – this will cost you a lot of wasted power and void the warranty.
Model
Recommended
Pressure Setting for
flooded suction
Maximum Pressure
setting for flooded
suction
Maximum Pressure setting for Mains boosting
VSRM38-72
2.5Bar
3.0Bar
3.0Bar above existing mains pressure
(cannot exceed 10.0Bar)
VSRM48-72
3.1Bar
4.0Bar
4.0Bar above existing mains pressure
(cannot exceed 10.0Bar)
VSRM39-102
2.6Bar
3.0Bar
3.0Bar above existing mains pressure
(cannot exceed 10.0Bar)
VSRM58-102
3.7Bar
4.9Bar
4.9Bar above existing mains pressure
(cannot exceed 10.0Bar)
VSRM50-270
3.9Bar
4.2Bar
4.0Bar above existing mains pressure
(cannot exceed 10.0Bar)