Crane 104872, Installation And Operation Manual

8

Figure 2 shows a typical installation of an “A” version float, 

(an “AU” version will attach to the pump), using a piggy-back 

plug.

General Comments: 

1) Never work in the sump with the power on.

2) Level controls are factory set for a pumping differential of 9 

inches. If that is the cycle desired, simply circle the discharge 

pipe with the pipe mounting strap, feed the end through the 

worm drive, and tighten with a screwdriver. Be certain that the 

level control cannot hang up or foul in it’s swing. Also, make 

certain the top of the pump is still submerged when the level 

control is in the ‘off’ mode.

3) If a higher pump differential is needed, grip the cord near 

the neck of the float, then using the other hand, exert a 

steady force on the lower edge of the cable clamp. The cable 

clamp should slide up to the new pivot point. Attach the level 

control to the discharge hose in the manner described above.

4) Plug the level control plug into the receptacle, then plug 

the pump into the piggyback plug. One cycle of operation 

should be observed, so that any potential problems can be 

corrected.

5) It is recommended that the float should be set to insure 

that the sump well liquid level never drops below the top of 

the motor housing.

6.) Figure 3 shows a typical connection for pumps with 

the wide angle float and piggy-back plug. For manual and 

automatic operations.

Automatic - 

Plug float cord into outlet, then plug pump

cord into float cord.

Manual - 

Plug pump cord directly int outlet.

C-4) Electrical Connections:

C-4.1) Power and Control Cable:

The cord assembly mounted to the pump must not be modified 

in  any  way  except  for  shortening  to  a  specific  application. 

Any splice between the pump and the control panel must be 

made in accordance with all applicable electric codes. It is 

recommended that a junction box, if used, be mounted outside 

the sump or be of at least Nema 4 (EEMAC-4) construction if 

located within the wet well. 

Do not use the power or control 

cable to lift pump. NOTE: The white wire is NOT a neutral 

or ground lead, but a power carrying conductor.

C-4.2) Overload Protection :

C-4.2-1)  Three Phase (Optional) - 

The normally closed 

(N/C) thermal sensor is embedded in the motor windings and 

will detect excessive heat in the event an overload condition 

occurs. The thermal sensor will trip when the windings become 

too hot and will automatically reset itself when the pump motor 

cools to a safe temperature. It is recommended that the thermal 

sensor be connected in series to an alarm device to alert the 

operator of an overload condition, and/or the motor starter coil 

to stop the pump. In the event of an overload, the source of this 

condition should be determined and rectified immediately. 

DO 

NOT LET THE PUMP CYCLE OR RUN IF AN OVERLOAD 

CONDITION OCCURS !

120 Volt 1 Phase

Automatic

240 Volt 1 Phase

FIGURE 3

Manual

Manual

Automatic

TYPICAL INSTALLATION WITH WIDE ANGLE 

LEVEL CONTROL

FIGURE 2