www.Wayne-Dalton.com
349981 REV2_05/17/2016
©
Copyright 2016 Wayne Dalton, a division of Overhead Door Corporation
22
Section 5
Wiring
All Wayne Dalton Advanced Performance Option Service Door Models
are currently available only in 3-phase voltages, with 208, 240(230), or
480(460) VAC as voltage options. Presently 575 VAC is available only with
the use of a 3-phase, 575V/480V step-down transformer for our Wayne
Dalton Advanced Performance Option Service Door 800 and 800C models.
YOUR LOCAL CODES MAY REQUIRE THAT THE INCOMING POWER TO
YOUR WAYNE DALTON ADVANCED PERFORMANCE OPTION SERVICE
DOOR HAVE A LOCK-OUT / TAG-OUT EQUIPPED FUSED DISCONNECT
SWITCH (TO BE FURNISHED BY OTHERS) WITHIN EYESIGHT OF THE
DOOR’S CONTROL PANEL.
Incoming power must meet all NEC and local building codes, plus be
properly sized for the control panel’s amperage rating on the nameplate.
To reduce the risk of electrical shock, the chassis of the control panel must
be properly grounded.
CAUTION
Wayne Dalton Advanced Performance Option Service Door models must
be supplied by a grounded Wye voltage supply, e.g. 208 Y/120, 480 Y/277.
Ungrounded voltage supply sources must be avoided, e.g. 480 VAC, 240
VAC or 120 VAC Delta systems should
NOT
be used. Voltage unbalance is a
common occurrence on delta supply systems, which power both single and
3-phase load. This can lead to unequal voltages on each phase leg. Voltage
unbalance can cause deterioration of motor performance such as, loss of
torque, overheating, decrease the winding insulation life and can cause
motor starter contacts, located in the control panel, to permanently "weld"
closed. Voltage unbalance can be caused by inadequate conductor sizing,
delta transformer sizing, excessive single phase loads, poor grounding or
intermittent high resistance faults (faults which do not generate high enough
fault currents to trip an over current protection device, but will cause the
distributed capacitance in an ungrounded 3-phase system to shift). This
shift may cause destructive over-voltages to occur. If a 240 VAC 3-phase
delta system must be used, it is strongly recommended that this voltage be
transformed to a 208V grounded wye system. Any single phase loads should
be evenly distributed as much as possible between the 3 phases. Consult
your a licensed electrician if you have any questions.
Wayne Dalton will not cover damage caused by failure of the motor,
control panel or other electrical components due to the use of an
inadequately grounded system.