Carrier 19FA Uživatelský manuál stáhnout pdf (Strana 11)

HVAC Training

Page: 11 of 13

Title: Chiller High Voltage Motor Terminations Lesson Plan #: NMH30L050303

g) With the terminal stud in the ceramic insulator, slide ceramic insulator over the motor lead

and thread insulator into motor housing, Torque insulator to 25 Ft lbs.

h) Lubricate terminal stud o-ring and slide over the threaded portion of the copper stud, then

install copper sleeve.

Important: The copper sleeve, which contacts the o-ring packaged with the ceramic terminal, has

been machined to fit that terminal assembly inside diameter. Do not mix terminals insulators and

sleeves, use only the sleeves, use only the sleeve provided with each individual terminal.

i) Slide the copper washer over the stud and next to the copper sleeve. If replacing the old

plastic terminal and not the terminal stud, two or more washers will be necessary because

of the difference in length between the old insulator and the new ceramic insulator.

j) Install the brass jam nut and tighten against the washers to maximum of 3 Ft lbs while

holding copper stud. This will seat the copper washer against the insulator and draw the

internal shoulder onto the stud against the internal edge of the insulator.

Note: The copper sleeve will not crush the o-ring.

If leakage occurs after the terminal is assembled, then the parts are defective and should be

replaced. Do not over tighten to eliminate leaks.

1.1.2.4 Demonstration

Prior to performing the demonstration have the trainees perform the hazard assessment and determine what PPE is

required for the task. Using the Lab Practical Evaluation and the work instructions, show the trainee how to perform the

installation.

An optional exercise is to have one of trainee's perform the installation as you explain the process. Based on the

experience of the trainee, have one trainee read the instruction and the other perform the task. Self check/Peer check.

1.1.2.5 Practice

Have trainee assemble the terminal

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Carrier 19FA Uživatelský manuál Strana 11