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English (US)
Checking at the pin connection behind the
terminal box (see section 8.3 Replacing the
terminal box or capacitor for terminal box
removal):
Figure 15 shows terminal plug-in stator
relationship to the top / nameplate end of the
stator.
Fig. 15 Stator socket
Fig. 16 Internal wiring
8. Replacing components
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.
Stator pin
connection
Winding groups
1 to 2 RA: Main winding
4 to 5 RS
1
: Auxiliary winding
6 to 7 RS
2
: Auxiliary winding
2 to 8 T: Thermiks
Connection
Ohm value
range
Nominal
115 V
RA (1 to 2) = 6.7 - 7.9 7.3
RS
1
(4 to 5) = 3.0 - 3.6 3.3
RS
2
(6 to 7) = 3.0 - 3.6 3.3
T (2 to 8) = 0
Connection
Ohm value
range
Nominal
208 V
-
230 V
RA (1 to 2) = 30.4 - 35.6 33
RS
1
(4 to 5) = 12.0 - 14.0 13
RS
2
(6 to 7) = 12.0 - 14.0 13
T (2 to 8) = 0
TM04 5643 3609TM04 5637 3609
Warning
Before starting any work on this
circulator, make sure electrical
supply has been switched off and
that it cannot be accidentally
switched on.
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