Large Fountain Design Layout
A Large Fountain ...
|Pump Section - Water is supplied
to the pool via a main line and inlet (1), which
is controlled by a gate valve for inital filling
of the pool. A centrifugal end pump (2) recirculates
water through a butterfly valve (3) for adjustment
and a jet (4). Water from the jet is contained in
the pool and returned to the pump via an anti-vortex
plate (5), butterfly isolation valve (6), and strainer
(7), for removal of coarse material and protection
of the pump.
Filter Section - Water is filtered
by a sand filter (8), which includes a self-priming
pump independent from the main fountain group. Water
is returned through a gate isolation valve (9) through
adjustable inlets (10), which can be directed to
create turbulence in desired areas. Water is returned
to the filters via an anti-vortex plate (11), surface
skimmer (12), and a vacuum fitting (13); which are
connected to a manifold (14). These lines each have
isolation gate valves. The manifold is connected
to the strainer on a small self-priming pump which
recirculates the water from the pool through the
filter. Chemical addition is accomplished by use
of a small metering pump (15) and tank to supply
hypochlorite solution. An overflow drain (16) is
set to eliminate rainwater, etc., to prevent overflow.
The upper section can be unscrewed to completely
drain the pool.
Electrical Control Section - An
electric water makeup control replaces water lost
to evaporation, splashing, etc. This sensor and
control actuate a solenoid valve (17) on the main
water line to maintain water level and cuts off
electrical power to lighting fixtures if they are
not immersed. A wind control (19) monitors wind
conditions and can shut down or reduce the flow
to the jet at preset wind conditions. The underwater
lighting fixture (20) is a base mounted unti connected
to an underwater junction box (21) by underwater
cable. The junction box is conduit-connected to
the control box, and completely potted to prevent
leakage. The light is controlled by a timer or sequencer.
The main control box (22) houses the timers, light
controls, water makeup and wind controls. In addition,
it is the center for power distribution to various
components and contains circuit breakers, fuses,
motor starters, etc.
|This diagram illustrates the various
circuits and components commonly used in a large
fountain, including a centrifugal flooded end pump,
a filtration and water treatment system, various
sensors, underwater lighting and electrical controls.