![background image](http://html.mh-extra.com/html/larson-electronics/pdu-ats-100a-208y-120-3ph/pdu-ats-100a-208y-120-3ph_instruction-manual_677016003.webp)
MANUAL OPERATION
A manual HANDLE is shipped with the transfer switch. Manual operation must be checked BEFORE the transfer switch is
operated electrically. To check manual operation, proceed as follows:
1. Turn the generator’s AUTO/OFF/MANUAL switch to OFF.
2. Turn OFF both UTILITY and EMERGENCY power supplies to the transfer switch, with whatever means provided
(such as the main line circuit breakers).
3. Note position of transfer mechanism main contacts by observing the display windows, "UTILITY" and "STANDBY",
as follows:
o
"UTILITY" window ON, "STANDBY" window OFF - LOAD termi-nals (T1, T2, T3) are connected to utility
termi-nals (N1, N2, N3).
o
"UTILITY" window “A” OFF, "STANDBY" window ON - LOAD termi-nals (T1, T2, T3) are connected to
emergency terminals (E1, E2, E3).
Larson Electronics, LLC
Phone: (800) 369-6671
Fax: (903) 498-3364
www.larsonelectronics.com
3 of 13
PDU-ATS-100A-208Y.120-3PH
CLOSE TO NORMAL SOURCE SIDE
Before proceeding, verify the position of the switch by observing THE "UTILITY" window. If window reads “ON”, the
contacts are closed in the normal position, no further action is required. If it reads “OFF”, proceed with Step 1.
Step 1: With the handle attached to the actuating shaft, move handle in the direction of the arrow on the switch cover until
it stops — DO NOT FORCE. Release handle slowly to allow the spring in the switch box to relax. “ON” now appears in the
"UTILITY" window and “OFF” appears in the "STANDBY" window.