Product Manual

5 Transfer Switch Service

5.1 Introduction

This section covers the removal and replacement procedures for transfer switch components.

NOTICE

For servicing purposes, each transfer switch assembly is removed and replaced as a single

component; there are no serviceable sub-components.

5.2 Hardware Torque Specifications

Unless otherwise stated, use the following recommendations when torquing hardware:

TABLE 9. HARDWARE TORQUE SPECIFICATIONS

Models Description Recommended Torque

All M3 Nut, Screw, or Bolt 5 - 6 in-lb (0.6 - 0.72 Nm)

M4 Nut, Screw, or Bolt 13 - 17 in-lb (1.5 - 1.9 Nm)

M5 Nut, Screw, or Bolt 24 - 30 in-lb (2.7 - 3.4 Nm)

M6 Nut, Screw, or Bolt 40 - 50 in-lb (4.6 - 5.7 Nm)

1/4-20 Nut, Screw, or Bolt 70 - 80 in-lb (7.9 - 9.0 Nm)

100A and

200A Only

Source A, B, and Load Power Terminal Screws Securing

Busbar to Mechanism Housing:

-- 100A 62.0 - 70.8 in-lb (7.0 - 8.0 Nm)

-- 200A 70 - 80 in-lb (7.9 - 9.0 Nm)

SE Models Only: Stainless Steel Inner and Outer Door Panel

Screws

62 - 77 in-lb (7.0 - 8.7 Nm)

SE Models Only: Source A Power Terminal Screws Securing

Busbar to Circuit Breaker

70 - 80 in-lb (7.9 - 9.0 Nm)

5.3 Switch Removal and Replacement Procedure

5.3.1 Disconnect AC Power

WARNING

The transfer switch is a shock hazard that can cause severe personal injury or death unless all

AC power is removed. Disconnect all sources of AC power to the transfer switch before

servicing.