Crane DEMING 7365N-X54-95-30N, Installation And Operation Manual

12

TABLE 1

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

B-4.4) Moisture Sensors:

A normally open (N/O) set of moisture probes are is installed 

in the pump seal chamber, which can be used detect 

any moisture present in the seal chamber and/or motor 

chamber. A 330 K-Ohm, 1 watt test resistor is mounted 

between the probes to allow for verification that the moisture 

sensor circuit is in-tact using a multi-meter. The moisture 

sensors MUST be connected to moisture detector control 

in the control panel. The normally closed (N/C) contact of 

the moisture detector MUST be connected in series with 

the control circuit of the motor contactor. Wiring must be 

provided from the moisture detector sensor probe leads of 

the motor designated W1 and W2. In the event of moisture 

detection, the pump should be pulled and the source of the 

failure located and repaired. 

IF MOISTURE DETECTION 

HAS OCCURRED, SCHEDULE MAINTENANCE AS SOON 

AS POSSIBLE!

B-4.5) Control Panel and Electrical System:

The control panel and the electrical system MUST be 

properly designed and wired to include at least, but not

limited to the following;

a. Proper grounding per NEC. 

b. A temperature sensing circuit (See Fig. 4) 

c. A moisture detection circuit with continuity test

    circuit  (See Fig. 4) 

d. A level control system. 

e. A main power manual disconnect and lock out. 

f.  A motor starter and overload system.

B-5) When Used with a Variable Speed Drive:

Maximum turndown should not exceed 2:1. Drive should be 

set to operate in constant torque mode. 

It is advisable that all three phase control panels be 

purchased from the factory.

If a panel is to be supplied locally, it is recommended that 

the Crane Pumps & Systems Pump Monitor Relay (P/N 

134667) be used to perform the control circuit functions for 

the Temperature and Moisture Sensor Monitoring described 

in sections B4.3 and B4.4. The Pump Monitor Relay was 

designed to perform these functions in a compact module 

that can be base or panel mounted and is resistant to noise 

issues found with some VFD’s. Indicator lights on the front 

display notify the operator in the event of a fault condition 

for either temperature, moisture or both. Normally open and 

normally closed contacts are flexible to accommodate nearly 

any wiring scenario and the moisture sensor sensitivity can 

be adjusted to prevent nuisance alarms.

SECTION: C START-UP OPERATION

C-1) Check Voltage and Phase:

Before operating pump, compare the voltage and phase 

information stamped on the pump’s identification plate to the 

available power.

C-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 and will 

always be in the opposite direction of the rotation arrows 

cast in the pump volute.

C-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 cable leads at 

the control box. Recheck the “kickback” rotation again by 

momentarily applying power.

C-2.2) Test Procedure For Moisture Sensor Control:

With a moisture detection control, a normally open push 

button is typically provided as a means of checking the 

moisture sensing components. When the push button is 

depressed, the probes will be shorted simulating water. 

While being held, the seal leakage indicating lamp will be 

illuminated to indicate (A) power is supplied to the control, 

(B) the control is operative, and (C) wiring to the moisture 

sensing probes in the pump is intact. This procedure should 

be performed periodically to confirm integrity of the circuit.

C-3) Start-Up Report:

Included at the end of this manual is one start-up report 

sheet, this sheet is to be completed as applicable. Return a 

copy to Crane Pumps & Systems and store the second in 

the control panel or with the pump manual. It is important 

to record this data at initial start-up since it will be useful to 

refer to should servicing the pump be required in the future.

C-3.1) Identification Plate:

Record the numbers from the pump’s identification plate on 

the START-UP REPORT provided at the end of the manual 

for future reference.