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English (US)
3. Check the following before you tighten the clamp:
– The contact face of the pump housing and that of the pump
head must be in full contact.
– Position the clamp correctly in the flange recess of both the
pump head and the pump housing. See fig. 12.
Tightening torque: 5.9 lbf-ft (± 0.75) (8 Nm (± 1)).
Fig. 12 Positioning of clamp ring
8.4 Base plate
Twin-head pumps have tapped holes in the bottom of the pump
housing. The holes can be used for mounting a base plate.
8.5 Insulation
Follow the guidelines in fig. 13 when insulating the pump.
Fig. 13 Insulation of TPE2, TPE3 pumps
8.6 Frost protection
Pumps which are not being used during periods of frost must be
drained to avoid damage.
8.7 Ensuring motor cooling
Fig. 14 Minimum distance (D) from the motor to a wall or other
fixed objects
8.8 Outdoor installation
When installed outdoors, the motor must be provided with a
suitable cover to avoid condensation on the electronic
components. See fig. 15.
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 air humidity,
we recommend that you enable the built-in standstill heating
function.
Fig. 15 Examples of covers (not supplied by Grundfos)
TM06 0724 0814
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.
TM05 7918 1613
Pos. Description
A Without insulation
B Correct insulation
C Incorrect insulation
In order to ensure sufficient cooling of the motor,
the distance (D) between the end of the fan cover
and a wall or other fixed objects must always be
at least 2.0" (50 mm), irrespective of motor size.
See fig. 14.
TM05 5236 3512
When fitting a cover to the motor, observe the
guideline in section 8.7 Ensuring motor cooling.
TM05 7919 1613
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