Base Plate; Insulation; Frost Protection; Cable Entries - Grundfos TPE2 D Manual Del Usuario

8.4 Base plate

Twin-head pumps have tapped holes in the bottom of the pump
casing. You can use the holes for mounting a base plate.

8.5 Insulation

Do not insulate the motor stool as this will trap any
vapor escaping from the shaft seal, thus causing
corrosion. Covering the motor stool with insulation
will also make inspection and service difficult.
Follow the guidelines in fig. 12 when insulating the pump.
A
B
Fig. 12 Insulation of TPE2, TPE3 pumps
Pos. Description
A Without insulation
B Correct insulation
C Incorrect insulation

8.6 Frost protection

Drain pumps which are not being used during periods of frost to
avoid damage.

8.7 Cable entries

See the size of the cable entries in section
data.

8.8 Ensuring motor cooling

Leave at least 2.0" (50 mm) between the end of the fan cover and
a wall or other fixed objects. See fig. 13.
Fig. 13 Minimum distance, D, from the motor to a wall or other
fixed objects
C
34. Other technical
D

8.9 Outdoor installation

If you install the motor outdoors, provide the motor with a cover
and open the drain holes to avoid condensation on the electronic
components. See fig. 14.
When lifting a cover to the motor, observe the
guidelines in section
The cover must be sufficiently large to ensure that the motor is
not exposed to direct sunlight, rain or snow. Grundfos does not
supply covers. We therefore recommend that you have a cover
built for the specific application. In areas with high humidity, we
recommend that you connect the motor permanently to the power
supply and activate the built-in standstill heating function. See
section 17.26 "Standstill heating".
Fig. 14 Examples of covers, not supplied by Grundfos
In order to maintain the UL mark, additional
requirements apply to the equipment. See Appendix
1. Installation in the USA and Canada

9. Electrical installation

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply to the motor and to the
signal relays. Wait at least 5 minutes before you
make any connections in the terminal box. Make
sure that the power supply cannot be accidentally
switched on.
DANGER
Electric shock
Death or serious personal injury
- Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
If the power supply cable is damaged, it must be replaced by the
manufacturer, the manufacturer's service partner or a similarly
qualified person.
The user or the installer is responsible for the installation of
correct grounding and protection according to local regulations.
All operations must be carried out by a qualified electrician.
The product should be installed according to National Electrical
Code (NEC) requirements.
8.8 Ensuring motor cooling.
on page 208.
13