Replacing Components; Removing The Pump Head - Grundfos UP XL Série Notice D'installation Et De Fonctionnement

Checking at the pin connection behind the
terminal box (see section
terminal box or capacitor
removal):
Stator pin
connection
1 to 2
4 to 5 RS
6 to 7 RS
2 to 8
Connection
RA (1 to 2)
RS (4 to 5) =
1
115 V
RS (6 to 7) =
2
T (2 to 8)
Connection
RA (1 to 2) = 30.4 - 35.6
208 V
RS (4 to 5) = 12.0 - 14.0
1
-
RS (6 to 7) = 12.0 - 14.0
230 V
2
T (2 to 8)
Figure 15 shows terminal plug-in stator
relationship to the top / nameplate end of the
stator.
Fig. 15 Stator socket
Fig. 16 Internal wiring
16
8.3 Replacing the
for terminal box
Winding groups
RA: Main winding
: Auxiliary winding
1
: Auxiliary winding
2
T: Thermiks
Ohm value
Nominal
range
= 6.7 - 7.9 7.3
3.0 - 3.6 3.3
3.0 - 3.6 3.3
= 0
Ohm value
Nominal
range
33
13
13
= 0

8. Replacing components

Warning
Before starting any work on this
circulator, make sure electrical supply
has been switched off and that it
cannot be accidentally switched on.

8.1 Removing the pump head

1. Disconnect or TURN OFF the power supply.
2. Close any isolating valves on either side of
the pump to avoid draining the system of
liquid.
3. Remove the vent plug to relieve any system
pressure retained in the pump. Exercise
caution as the fluid may be scalding hot
and under pressure. Only after the
pressure has been relieved and the pump
drained should you proceed with the next
steps.
4. Disconnect the electrical leads from the
terminal box.
5. Disconnect and remove the conduit from the
terminal box.
6. Loosen and remove the four 5 mm
allen-head screws which connect the pump
head housing to the pump housing.
7. Remove the pump head from the pump
housing. Exercise care as the rotor may
fall out of the stator or pump housing.
8. Clean the machined surfaces in the pump
housing of any foreign material.