7 |
P a g e
Swing Handle Operator
To install the swing handle operator:
1.
With ground strap in place on vertical
operating pipe, slide handle and handle lock
plate over the end of the vertical operating
pipe
2.
Fasten the lock plate at the proper location.
Recommended height for the lock plate is 3
ft. 6 in. above ground.
Note:
The lower end of the vertical operating
pipe should extend through the lock plate at
least 3 inches. It may extend as much as 3 feet
or more, just so it doesn’t touch the ground or
column footing.
3.
The lock plate assembly (Fig. 9) consists of
two castings, mounted on the pipe guide
plate, which can be easily adjusted in an arc
to provide the required rotation. These act
as locks for the manual operating handle
when it is dropped from the operating
position. The handle must be raised to a
horizontal position for operation.
4.
With the switch in the fully closed position,
set the handle clamp so its set screws are 4
inches above the lock plate and its vertical
centerline is at or near as possible to the
closed position, see Fig. 8.
5.
Temporarily fasten the handle to the pipe
with the set screws.
Worm Gear Mechanism
1.
With ground strap in place on vertical
operating pipe, slide worm gear mechanism
over the vertical operating pipe and attach it
to the structure.
2.
Remove the small position indicators, which
are attached to the worm gear coupling with
allen set screws.
3.
Tighten hex head set screws in the coupling
until the vertical operating pipe is pierced.
4.
If all stops at switch elevation have been set,
including the offset bearing, then it is safe to
reinstall the position indicators on the worm
gear mechanism. These indicators should
not quite touch the raised boss on the worm
gear housing in either the open or closed
position. There is a possibility of damage to
the indicators or the coupling if this is not
observed
Motor Operator
For remote operation, a motor operator is
supplied and it should be installed per the
instructions supplied with it.
Step 13—Arcing Horn Installation
Arcing horns are furnished only when horn
gap switches are ordered. When arcing
horns are used, they should be installed and
Summary of Contents for DR7
Page 1: ...IB DR7 A May 2012 ...
