Hydromatic S, Installation And Service Manual, Page: 3 / 16

3
IMPORTANT: If Hydromatic
electrical controls are not used
and the motor fails be cause of
improper components or if the
heat sensors are not properly
connected the motor guarantee
is void.
Hydromatic electrical equipment
is installed in a weatherproof
NEMA 3R enclosure. The
electrical equipment includes a
main circuit breaker for each
pump, a magnetic starter with
overload protection for each
pump, an H-O-A switch and run
light for each pump, an electric
alternator and a transformer to
provide ap pro pri ate control for
control circuit and alarms.
Two pumps operate together only
if sump level rises to the third or
over ride control. The override
control also brings on the second
pump in case of failure of the
first pump. Extra floats with
appropriate controls can be
supplied for alarm functions.
Triplex systems use four controls:
one set at turn-off, one set at
turn-on for one pump, one set
at turn-on for two pumps, and
one set at turn-on for three
pumps. Pumps alternate each
successive cycle.
Three pumps operate together
only if sump level rises to the
fourth control (second override).
This control also brings on the
third pump in case of failure of
either or both of the first two
pumps. Alarm Controls:
The alarm level is usually set
above the override level so the
alarm will signal only if the
override level is exceeded.
However, some engineers prefer
to have the alarm level set below
the override level as it is pos si ble
for one pump to fail and the other
pump to operate on the override
level with the sump level never
reach ing the alarm level. This is
par tic u lar ly true in cases of low
inflow capacity.
Electrical Control Panel:
It is recommended that the
Hydromatic control panel be used
with all pumps as proper starter
heat ers and connections for heat
sensor wires are furnished.
*Special junction box required for wire sizes larger than #4.