Installation Procedures; Piping Considerations - Grundfos UP XL Serie Instrucciones De Instalación Y Funcionamiento

The pump is lubricated and cooled by the
liquid being pumped. Therefore, the pumped
liquid must always be allowed to circulate
through the pump.
Extended periods without circulation will cause
premature wear to the bearings and excessive
motor heat.
The pumped liquid must meet the temperature
requirements listed in the following charts.
Note: Fluid must never be allowed to freeze
during non-operational periods.
Open systems
(domestic, potable hot water):
Fluid
Min. 36 °F (2 °C)
Max. < 149 °F (65 °C)
Caution!
In domestic hot-water systems,
it is recommended to keep the
liquid temperature below 149 °F
(65 °C) to eliminate the risk of lime
precipitation.
Closed systems
(non-potable heating or cooling airless fluid):
Pump
models
Min. All
UPS 26-150
Max. UPS 43-100
UPS 50-60
Water and glycol mix:
Max. 50 % glycol @ 15 °F (-9.5 °C) fluid
(Hydraulic performance change can be expected.)
6
Ambient
33 °F (1 °C)
100 °F (38°C)
Fluid Ambient
36 °F 33 °F
(2 °C) (1 °C)
230 °F 100 °F
(110 °C) (38°C)
230 °F 100 °F
(110 °C) (38°C)
212 °F 100 °F
(100 °C) (38°C)

4. Installation procedures

Warning!
Never make any connections in the
pump terminal box unless the
electrical supply has been
switched off.
The pump should not be
connected to the electrical
system until it has been properly
installed in the piping system.
Risk of electrical shock — this
pump has not been investigated
for use in swimming pool or
marine areas.

4.1 Piping considerations

When making piping connections, be sure
to follow the piping manufacturer's
recommendations and all code requirements for
piping material.
Thoroughly clean and flush all dirt and
sediment from the system before attempting to
install the pump.
4.1.1 Location in the piping line
The pump should never be located at the
lowest point of the piping system (where dirt and
sediment collect), nor should it be located at the
highest point of the piping system (where air
accumulates).
Warning!
The pump must be positioned
so that someone cannot
accidentally come into contact with
the hot surfaces of the pump.
When installing the pump into the piping
system, Grundfos recommends that pressure
gauges be installed in the inlet and discharge
flanges or pipes. This will allow the pump and
system performance to be checked.
Do not block the pipe plugs in the pump
housing flanges by locating the terminal box
over these plugs.