Grundfos VersaFlo UPS, Installation And Operating Instructions Manual

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5. Check to make sure the rotor turns freely. Do this
by removing the vent plug in the middle of the
pump nameplate. Insert a medium size flat-blade
screwdriver into the slot at the exposed end of
the shaft. Gently turn the shaft. If it does not turn
easily, repeat steps 1 to 4 above.
6. The position of the nameplate can be changed by
easing the outer edge of the plate at the cutout
with a screwdriver. Turn the nameplate to the
required position and push into place.
7. Refer to pages 18 and 19 for additional instruc-
tions.
3.2 Piping considerations
Thoroughly clean and flush all dirt and sediment from
the system before attempting to install the pump.
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.
Mounting positions
The arrows on the flanges of the pump indicate the
direction of water flow. Although the VersaFlo UPS
may be installed in either vertical or horizontal pip-
ing, the motor shaft must always remain horizontal,
as shown in figures 1 and 2.
Fig. 2 Direction of water flow through the pump
NOTE: Pumps installed outdoors must be protected
by a ventilated, watertight cover to keep out moisture
and dirt.
3.3 Connect the pump
Install the pump into the piping system.
Grundfos recommends that pressure gauges be
installed in the inlet and discharge flanges or pipes
to check pump and system performance.
3.4 Electrical connection
The electrical connection and protection should be
carried out in accordance with the latest edition of
the National Electrical Code, local codes and regula-
tions by a qualified electrician.
The operating voltage and frequency are marked on
the pump nameplate. Make sure that the motor is
suitable for the electrical supply it is being installed
to.
The pump should be grounded to protect against
indirect contact and a ground fault interrupter can be
used as extra protection.
Multi-speed pump (single-phase)
All single-phase pumps are equipped with built-in,
automatic resetting, thermal overload protection.
The pump is protected at all three speeds.
Multi-speed pump (three-phase)
The pump must be connected to the electrical supply
via an external contactor. The contactor must be
connected to the built-in thermal overload switch ter-
minals T1 and T2 (3 x 208-230 V) or P1 and P2
(3 x 460 V and 575 V) to protect the pump against
overloading at all three speeds.
OR: If the pump is protected by means of a motor
starter, the starter must be set to the current con-
sumption of the pump at the selected speed. The
motor starter setting must be changed every time the
pump speed is changed. The current consumption at
the individual speeds is stated on the pump name-
plate.
Figures 4, 6, 7, 9, and 10 on the next pages show the
possible connections.
TM
03
72
90
47
06
WARNING!
The pump must be positioned so that
someone cannot accidentally come into
contact with the hot surfaces of the pump.
WARNING!
Never make any connections in the pump
terminal box unless the electrical supply
has been switched off.
The pump must be grounded.
The pump must be connected to an exter-
nal main power switch.