Frost Protection - Grundfos JP 5 Installation And Operating Instructions Manual

8.1.2 Assembly
1. Moisten O-ring (pos. 13) with soapy water and fit
it into the recess of the suction port of ejector
(pos. 14).
2. Fit the ejector into pump sleeve (pos. 16). Check
that O-ring (pos. 13) is positioned correctly on the
collar of the suction port of the sleeve.
3. Moisten O-ring (pos. 31) with soapy water and
place it on the ejector.
4. Moisten seal ring (pos. 91) with soapy water, fit it
into the recess of the ejector and turn it against
the stop.
5. Fit the pump sleeve with the ejector to the motor
stool. Check that O-ring (pos. 31) is positioned
correctly.
6. Place clamp (pos. 92) on the pump sleeve, and fit
and tighten the screw and nut.
7. Refit plug (pos. 25) or ejector valve (pos. 25a).
Check that the ejector valve is in position 1. See
fig. 4. Tighten the plug or ejector valve using
fingers only.
In orders for spare parts, please mention the position
number in fig. 6 and the pump data marked on the
pump nameplate.
Fig. 6 Exploded view of jet pump
The pump illustrated in fig.
Note
from the actual pump version.
8
Fig. 7

8.2 Frost protection

Caution
To drain the pump, remove the plug (P) and the plug
or the ejector valve (V). See fig. 8.
Fig. 8
Refit the plugs and tighten them using fingers only.
6 may differ
Cleaning the impeller
If the pump is not used during periods of
frosts, it must be drained to avoid damage.
P
V
Draining the pump
Warning
Make sure that the escaping hot or cold
liquid does not cause injury to persons or
damage to the equipment.
20 °C
10
0
-10
-20