Order Of Assembly For Chambers And Impellers - Grundfos CR 95 Service Instructions Manual

7.4 Order of assembly for chambers and impellers

The assembly of the pump is illustrated in the following drawings.
Each symbol corresponds to a different chamber.
7.4.1 Standard impellers
Pos. 49 is the standard size impeller.
7.4.2 Impellers with reduced diameter
Pos. 49a is an impeller with reduced diameter, 2/3 of standard size.
Impellers (49a) must be fitted as the last stages which are at the
upper part of the pump stack.
Pos. 49h is an impeller with reduced diameter and a larger front
shroud diameter. These impellers are only fitted in pumps which
also contain impellers (49a) with reduced diameter.
Impeller (49h) must be fitted as first stage of the pump which is
placed just above the inlet part (44). Impellers with pos. 49h can be
identified by having one of the below listed part numbers which is
engraved into the impeller:
• 99549699
• 99547569
• 99553557
• 99553558
• 99553559
• 99553560
1 1 2
CR95
3a
47a
48
49b
49
49a
49h
3 4 5 5 6
50 Hz 60 Hz
Stage
3
3a
48
47g
48a
47a
49b
48
49
49b
49a
49
49a
7 8 9 10 11
4a
47g
47a
47a
48
48a
49b
49
49a
12
11
10
9
8
7
6
5
4
3
2
1
12
4
44
48
49b
49
49a
23