Crane 104872, Installation And Operation Manual

9

If current through the temperature sensor exceeds the values 

listed, an intermediate control circuit relay must be used 

to reduce the current or the sensor will not work properly. 

TEMPERATURE SENSOR ELECTRICAL RATINGS

Volts

Continuous 

Amperes

Inrush 

Amperes

110-120

3.00

30.0

220-240

1.50

15.0

440-480

0.75

7.5

600

0.60

6.0

C-4.2-2) Single Phase (Standard) - 

The type of in-winding 

overload protector used is referred to as an inherent overheating 

protector and operates on the combined effect of temperature 

and current. This means that the overload protector will trip 

out and shut the pump off if the windings become too hot, or 

the load current passing through them becomes too high. It 

will then automatically reset and start the pump up after the 

motor cools to a safe temperature. 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 !

C-4.3) Moisture Sensors- DS Models:  (Optional)

A normally open (N/O) detector is installed in the pump 

seal chamber which will detect any moisture present. It is 

recommended that this detector be connected in series to an 

alarm device or the motor started coil to alert the operator that a 

moisture detect has occurred. In the event of a moisture detect, 

check the individual moisture sensor probe leads for continuity, 

(∞ resistance = no moisture) and the junction box/control box 

for moisture content. The above situations may induce a false 

signal in the moisture detecting circuit.  If none of the above 

tests prove conclusive, the pump(s) should be pulled and the 

source of the failure identified and repaired.  

IF A MOISTURE 

DETECT HAS OCCURRED SCHEDULE MAINTENANCE AS 

SOON AS POSSIBLE.

C-4.4) Wire Size:

Consult a qualified electrician for proper wire size if additional 

power cord length is required. See table on pages 9 and 10 

for electrical information.

SECTION: D START-UP OPERATION

D-1) Check Voltage and Phase:

Before operating pump, compare the voltage and phase 

information stamped on the pump identification plate to the 

available power.

D-2) Check Pump Rotation:

Before putting pump into service for the first time, the motor 

rotation must be checked. Improper motor rotation can 

result in poor pump performance and can damage the motor 

and/or pump. To check the rotation, suspend the pump 

freely, momentarily apply power and observe the “kickback”. 

“Kickback” should always be in a counter-clockwise direction 

as viewed from the top of the pump motor housing. 

D-2.1) Incorrect Rotation for Three-Phase Pumps:

In the event that the rotation is incorrect for a three-phase 

installation, interchange any two power cord leads at the 

control box. 

DO NOT

 change leads in the cord housing in the 

motor. Recheck the “kickback” rotation again by momentarily 

applying power.

D-2.2) Incorrect Rotation for Single-Phase Pumps:

In the unlikely event that the rotation is incorrect for a single 

phase pump, contact a Barnes Pumps Service Center. 

D-3) Identification Plate:

Record future serial plate information in the “NOTES” section. 

D-3.1) Pump-Down Test:

After the pump has been properly wired and lowered into the 

basin, sump or lift station, it is advisable to check the system 

by filling with liquid and allowing the pump to operate through 

its pumping cycle. The time needed to empty the system, or 

pump-down time along with the volume of water, should be 

recorded on the start-up report.

SECTION E: PREVENTATIVE MAINTENANCE

As the motor is oil filled, no lubrication or other maintenance 

is required, and generally Barnes Pumps will give very reliable 

service and can be expected to operate for years on normal 

sewage pumping without failing. In our experience attempts 

at preventative maintenance are more likely to reduce, rather 

than extend the life of our pumps. However, if you are inclined 

to perform preventative maintenance, the following are the 

steps that should be performed.

1)   Inspect motor chamber for oil level and contamination

and repair as required per section F-1.

2)  Inspect impeller and body for excessive build-up or

clogging and repair as required per section F-2.

3)  Inspect motor and bearings and replace as required 

per section F-3.

4)  Inspect seal for wear or leakage and repair as required

per section F-4.