Bell and Gossett Hoffman Specialty SCC4, Инструкция по эксплуатации, Страница: 5 / 12

INSTRUCTIONS
APPLICATION - For automatically contr olling the liquid level in
a closed tank by float movement.
MOUNTING - Scr ew-in Tank Float Switches are mounted
directly to the tank by means of the 2 1 /
2
" I.P.S. threaded fitting
(D). Before screwing this fitting into tank, loosen Nut (C) so that
the fitting (D) is free to rotate in the switch bracket. Tighten the
fitting (D) so that there will be no leak past the threads. Then
revolve the switch case until it is horizontal and tighten Nut (C).
REVERSE ACTION - T o change, relocate operating link to the
opposite slot in base plate and corresponding hole in adjusting
plate.
ADJUSTMENT - Switches ar e shipped from the factory set for
a specified float travel. Reasonable adjustment of float travel
can be made in the field by moving adjusting strips (7) which
are held in place by Screws (A) and (B). Loosen Screw (B) and
moving upper adjusting strip (7) will affect the upper limit of
float travel only. Loosening Screw (A) and moving lower adjust-
ing strip (7) will affect the lower limit of float travel.
CAUTION: Switches ar e shipped with a bracket attached to
the mounting plate. This bracket prevents the float and the rod
from moving in the tank during shipment. When installing the
system, this clearly marked shipping bracket must be removed
and discarded.
5
INSTRUCTIONS
APPLICATION - Mechanical Alter nators serve to open and
close an electric circuit by an upward and downward float
movement. The forces are applied by means of a float operat-
ing between different liquid levels. The action is such that two
switch units are alternated on successive cycles. If the liquid
level continues to rise or fall with one pump in operation, the
lever will continue to travel to a further position at which point
the “second” switch will be operated, throwing the stand-by
pump across the line.
MOUNTING - Mechanical alter nators are mounted directly to
the tank by means of the 2
1
/
2
" I.P.S. threaded fitting (D). Before
screwing this fitting into tank, loosen Nut (C) so that the fitting
(D) is free to rotate in the switch bracket. Tighten the fitting (D)
so that there will be no leak past the threads. Then revolve the
switch case until it is horizontal and tighten Nut (C).
ST ANDARD OPERATION - Contacts ar e arranged for sump
action. In this form the contacts will close on increase in liquid
level.
REVERSE ACTION - T o change, relocate operating link to the
opposite slot in base plate and corresponding hole in adjusting
plate.
ADJUSTMENT - Switches ar e shipped from the factory set for
a specified float travel. Reasonable adjustment of float travel
can be made in the field by moving adjusting strips (7) which
are held in place by Screws (A) and (B). Loosen Screw (B) and
moving upper adjusting strip (7) will affect the upper limit of
float travel only. Loosening Screw (A) and moving lower adjust-
ing strip (7) will affect the lower limit of float travel.
CAUTION: Switches ar e shipped with a bracket attached to
the mounting plate. This bracket prevents the float and the rod
from moving in the tank during shipment. When installing the
system, this clearly marked shipping bracket must be removed
and discarded.
T ANK FLOAT SWITCH
MECHANICAL ALTERNATOR
Item Number Part
Number Description Required Number
1
Complete Float Switch
1 DA0393
with Float - NEMA 1
4 Float 1 DA0165
7
7
B
A
2
5
1
C
D
4
3
7
7
B
A
2
5
1
C
D
4
3
Item Number Part
Number Description Required Number
1
Complete Mech. Altr.
1 DA0361
with Float - NEMA 1
4 Float 1 DA0165