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22-32
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All Rights Reserved
Float Switches Mechanical Alternators, Types A and C
schneider-electric.us
Class 9038 / Refer to Catalog 9034CT9701
22
PRESSURE, VACUUM, AND FLOAT
SWITCHES
Type A, Open Tank
Type AG1
Mechanical Alternator, Float Operated
.84
21.34
1.47
37.34
1.125
28.58
4.50
114.3
3.0
76.2
1.75
44.45
1.25
31.7
3.5 to 4.19
88.9 to 106.4
pos1
pos 2
pos 3
5.38
136.5
(4)
.093
2.36
dia.
mtg holes
0.75
19.05
6.88
174.75
.5 to .75
12.7 to 19.05
cond.
(4) K.O.’s for
4.69
119.13
3.63
92.2
1.06
26.92
Type A Dimensions, in. (mm)
File No. E12158
excludes NEMA 7 & 9 products
(9038AR, CR, and DR)
File LR25490
excludes NEMA 7 & 9 products
(9038AR, CR, and DR)
Alternators are designed to provide motor alternation in the operation of two motors.
Table 22.99: Class 9038 Type A
Application Description
NEMA 1 NEMA 4 NEMA 7 and 9
Catalog No. Catalog No. Catalog No.
For open tank or sump systems
using duplex pumps
Mechanical
alternator
float operated
9038AG1 9038AW1 9038AR1
NOTE: For use with Class 9049 float accessories listed on page 22-34.
Type AW and AR alternators must use center hole floats.
Table 22.100: Operating Forces—Types AG, AR and AW
Type
Without
Compensat-
ing Spring
(No Form C)
With Compensating Spring (Form C)
Maximum Weight of Rod
and Stops Supported
Length of Rod Supported
at the
Maximum Adjustment
Force
Up[8]
Force
Down
Note: AW1 and AR1 have
compensating spring
standard.
Brass
[9]
Stain-
less
Steel [9]
Alumi-
num
[9]
AG1 (min. lever ext.)
18 oz 20 oz 47 oz. 10 ft 12 ft 25 ft
AG1 (max. lever ext.)
16 17 41 8 10 21
AG1 Form R (min. lever ext.)
14 16 33 7 8 17
AG1 Form R (max. lever ext.)
11 12 30 6 7 15
AR1, AW1 (standard lever)
— — 74 16 20 41
AR1, Form R, AW1 Form R (std.
lever)
— — 85 19 23 47
Type C, Closed Tank, with Bushing
Type CG36
Float on left
Flange mounted with bushing for control of liquid level within a closed tank. Build up the
switch to meet your requirements from the basic switch, rod kit, and float kit groups
below.
Type C switches are attached to the tank by means of a 2-1/2 in. screw-in bushing. An
external pointer indicates the float position within the tank when the unit is mounted.
Switches come complete with screw-in connector, stainless steel float and rod.
Table 22.101: Class 9038 Type C
Float Position Viewed from Front
of Switch Facing Indicator Scale
R
in. (mm)
Approx. Water
Level Change
NEMA
Type 1
NEMA
Type 4
NEMA
Type 7, 9
Min. (in.) Max. (in.) Catalog No. Catalog No. Catalog No.
Right 7 (178) 6.5 (165) 13 (330)
9038CG31 9038CW31 9038CR31
Left
7 (178) 6.5 (165) 13 (330)
9038CG32 9038CW32 9038CR32
Right 4.25 (108) 4 (102) 7.75 (197)
9038CG33 9038CW33 9038CR33
Left
4.25 (108) 4 (102) 7.75 (197)
9038CG34 9038CW34 9038CR34
Right 5 (127) 4.75 (121) 9.25 (235)
9038CG35 — —
Left
5 (127) 4.75 (121) 9.25 (235)
9038CG36 9038CW36 9038CR36
Table 22.102: Type C Float Travel Adjustments
R
in. (mm)
A
in. (mm)
B
in. (mm)
C
in. (mm)
D
in. (mm)
F
in. (mm)
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
7 (178) [10] 2.5 (64) 5 (127) 5 (127) 7 (178) 2 (51) 4 (102) 5 (152) 7 (178) 10 (254) 14 (495)
5 (127) [11] 2.25 (57) 3.75 (95) 4 (102) 5.25 (133) 2.75 (70) 3 (76) 4 (102) 5.25 (133) 8 (203) 10.5 (267)
4.25 (108) [12] 2 (51) 3.5 (89) 3.5 (89) 4.75 (121) 2.5 (64) 3.75 (95) 3.5 (89) 4.75 (121) 7 (178) 9.5 (241)
Type A Dimensions, in. (mm) Type CG Dimensions
R
A
C
B
D
F
2.5
64
1.97
50
5.94
151
2.59
66
0.88
22
0.38
10
0.44
11
0.44
11
4.0
102
7.0
179
17.81
452
1.75
44
2.5
64
6.5
165
max.
6.5
165
7.0
178
1.25
32
2.63
67
2.63
67
max.
To reverse the float, change the operating
link in the holes of the adjusting plate.
2.17
55
2.5
64
2.0
51
4.69
119
6.84
174
Pipe Tap
Bushing
Across
Flats
Combination knockouts,
0.5 in. (13 mm) and 0.75 in.
(19 mm), both ends
3.42
87
Replacement Float: 9049HF page 22-28
[8] Add 2 oz for Form N5 High Water alarm.
[9] Rod length has been determined using the weight of the rod material furnished on Class 9049 accessories (3/8" O.D. tubing).
Other types of rod should be weighed and compared to the Maximum Weight of Rod column in Table 22.100.
[10] CG31, CG32, CW31, CW32, CR31, CR32
[11] CG35, CG36, CW35, CW36, CR35, CR36
[12] CG33, CG34, CW33, CW34, CR33, CR34