6 Resistance Charts - Grundfos SuperBrute XL Installation And Operating Instructions Manual

5.6 Resistance charts

Checking connections in the terminal box at
the power connections L and N; see fig. 10 for
115 V and 208 - 230 V.
Connection
L to N (Speed 3) =
115V L to N (Speed 2) =
L to N (Speed 1) =
Connection
L to N (Speed 3) =
208V
- L to N (Speed 2) =
230V
L to N (Speed 1) =
*T can only be checked with the terminal box
removed; if the thermiks is open the pump will
not run.
L N
Fig. 10
14
OHM value
Nominal
range
6.9 to
7.55
8.01
9.7 to
10.54
11.38
12.97 to
14.10
15 23
OHM value
Nominal
range
34.63 to
37.65
40.66
41.57 to
45.19
48.81
56.67 to
61.60
66.53
Checking at the pin connection behind the
terminal box (see section 6.3 Replacing the
terminal box or capacitor for terminal box
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
115V
RS (6 to 7)
2
T (2 to 8)
Connection
RA (1 to 2)
208V
RS (4 to 5)
1
-
RS (6 to 7)
2
230V
T (2 to 8)
Fig. 11 shows terminal plug-in stator relation-
ship to the top / nameplate end of the stator.
Fig. 11 Terminal plug in stator
Fig. 12 Internal wiring
Winding groups
RA: Main winding
: Auxiliary winding
1
: Auxiliary winding
2
T: Thermiks
OHM value Nomi-
range nal
= 6.7 to 7.9 7 3
= 3.0 to 3.6 3 3
3.0 to 3.6 3 3
= 0
OHM value Nomi-
range nal
= 30.4 to 35 6 33
= 12 0 to 14 0 13
= 12 0 to 14 0 13
= 0