Harrington Hoists and Cranes (N)ER Hoist - ((N)ER2) - Manual (Page 17)

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3.4 Mounting the Hoist
3.4.1 Manual Trolley - Follow instructions in Owner’s Manual provided with the trolley.
3.4.2 Motorized Trolley - Follow instructions in Owner’s Manual provided with the trolley.
3.4.3 Hook Mounted to a Fixed Location - Attach the hoist’s top hook to the fixed suspension point.
3.4.4

Ensure that the fixed suspension point rests on the center of the hook’s saddle and
that the hook’s latch is engaged.
3.5 Electrical Connections
3.5.1

Ensure that the voltage of the electric power supply is proper for the hoist or trolley.
3.5.2

Do NOT apply electronic soft-start control or voltage varying controls to the ER2 or
NER2 hoist. Use of such devices may cause the motor brake and other electrical components to
malfunction. Variable frequency drives MAY be used with the single speed ER2/NER2 hoists, contact
Harrington Hoists, Inc. for more information.
3.5.3

Before proceeding, ensure that the electrical supply for the hoist or trolley has
been de- energized (disconnected). Lock out and tag out in accordance with ANSI Z244.1 “Personnel
Protection - Lockout/Tagout of Energy Sources”.
3.5.4

To avoid a shock hazard, DO NOT perform ANY mechanical or electrical
maintenance on the dual speed ( VFD control) trolley or hoist within 5 minutes of de-energizing
(disconnecting) the trolley or hoist. This time allows the internal VFD capacitor to safely discharge.
3.5.5

Do NOT remove power to the dual speed (VFD control) hoist or trolley during
operation.
3.5.6

All dual speed hoists are equiped with a VFD. The VFD is used to control the high
and low lifting speeds. The speeds come preset from the factory (See Table 3-6). Speed (frequency)
can be customized. Refer to Section 3.6.10 for hoist specific speed ranges and instructions.
3.5.7 The following instructions apply when the hoist is hook mounted to a fixed suspension point or installed
on a manual trolley. The hoist is controlled by a pendant with two push buttons
– one for raising and
one for lowering. Refer to the appropria te trolley Owner’s Manual if the hoist is installed on a motorized
trolley. Special wiring considerations must be taken if the trolley is used with a trolley other than an
MR2 model.
Pendant Cord
The Pendant Cord connects to the hoist via an 8-pin (8P) Plug and Socket. Make this connection
as follows:
 Refer to Figure 3-7.
 Insert the 8P Plug into the 8P Socket on the hoist and hand-tighten the Lock Ring.
 Attach the Cord Strain Relief Cable to the Cord Support on the bottom of the hoist.
Power Supply Cable - Hoist Connection
The Power Supply Cable connects to the hoist via a 4-pin (4P) Plug and Socket. Make this
connection as follows:
 Refer to Figure 3-7.
 Insert the 4P plug of the Power Supply Cable into the 4P Socket on the hoist and hand-tighten
the Lock Ring.
 Install the Cable Support Arm (pre-installed on the Power Supply Cable) on to the Socket
Holder using the pre-installed Machine Screws and Lock Washers.
 Use care to avoid twisting or kinking the Power Supply Cable.