Jandy FHPM Installation And Operation Manual - page 9
Page 9
ENGLISH
Jandy
®
Pro Series FHPM Pump
|
Installation & Operation Manual
3.1.4 Pipe Sizing
3.1.4.1
Suction Pipe
When the pump is located up to 50 feet from the pool,
the recommended Schedule 40 minimum pipe size for
the suction side of the pump is 1½" for .75 HP and 2"
for 1 to 2 HP. For 2.5 HP pumps, the recommended pipe
size is 2½".
3.1.4.2
Discharge Pipe
When the pump is located up to 50 feet from the pool,
the recommended Schedule 40 minimum pipe size for
the discharge side of the pump is 1½" for .75 HP and 2"
for 1 to 2 HP. For 2.5 HP pumps, the recommended pipe
size is 2½".
NOTE
Allpipesizes(Schedule40)areabletowithstandthe
pressures the pump will deliver, but not necessarily
the flow. If the pipe is too small for the pump, or if
the pump is elevated above water, the maximum
gallonsperminute(GPM)maynotbedelivered.If
this happens, the pump will develop an air pocket
(cavitation)thatwillmakenoise,andthelifeofthe
pump may be shortened.
3.1.4.3
Installation Recommendations
1.
If the pump is located below water level,
isolation valves must be installed on both sides
of the pump to prevent the back flow of pool
water during any routine or required servicing.
2.
To help prevent difficulty in priming, install
the suction pipe without high points, which
can trap air. (High points are inverted ‘U’s
above the inlet of a pump. In plumbing, they
are commonly referred to as airlocks.) For
installations of equipment up to 100 feet from
the water, refer to the pipe sizing chart in Table
2. For installations of equipment more than 100
feet from the water, the recommended pipe size
must be increased to the next size.
Table 2.
Pipe Sizing Chart for Schedule 40 PVC
Pipe
Size
Maximum Flow
Suction
(6 feet per second)
Maximum Flow
Discharge
(8 feet per second)
1½"
37GPM(140LPM)
50GPM(189LPM)
2"
62GPM(235LPM)
85GPM(322LPM)
2½"
88GPM(333LPM) 120GPM(454LPM)
3.
FHP Pumps come equipped with unions on
both the suction and discharge ports. This
feature simplifies installation and service, and
it eliminates the possibility of leaks at threaded
adapters.
4.
The FHP Pump must be connected to at least
two (2) main drains (suction outlets) for each
pool pump suction line. Each drain (suction
outlet) assembly must be provided with covers
and must be listed or certified to the latest
published version of ANSI
®
/ASME
®
A112.19.8
,
or its successor standard, ANSI/APSP-16
. The
suction outlets of the main drains must be at
least 3 feet apart or at different planes. The
suction outlets can be a drain and skimmer,
two (2) drains, two (2) skimmers, or a skimmer
with an equalizer line installed. For additional
details and guidelines, refer to ANSI/APSP 7,
the standard for Suction Entrapment Avoidance
in Swimming Pools, Wading Pools, Spas, Hot
Tubs, and Catch Basins. Check the local codes
for proper installation requirements. Applicable
local codes will take precedence over other
codes.
NOTE
To prevent entrapment, the system must be built so
that it cannot operate with the pump drawing water
fromonlyone(1)maindrain.Atleasttwo(2)main
drains
must be connected to the pump when it is in
operation.However,iftwo(2)maindrainsruninto
a single suction line, the single suction line may be
equippedwithavalvethatwillshutoffbothmain
drains from the pump.
5.
The piping must be well supported and not
forced together in places where constant stress
will be experienced.
6.
Always use properly sized valves. Jandy Pro
Series Diverter Valves and Ball Valves typically
have the best flow capabilities.
7.
Use the fewest fittings possible. Every
additional fitting has the effect of moving the
equipment farther away from the water.
NOTE
Ifmorethan10suctionfittingsareneeded,thepipe
size must be increased.
8.
Every new installation must be pressure tested
according to local codes. See Section 3.3,
Pressure Testing.
3.2 Electrical Installation
3.2.1 Voltage Checks
The correct voltage, as specified on the pump data plate,
is necessary for proper performance and long motor life.
The incorrect voltage will decrease the pump’s ability
to perform and can cause overheating, reduce the motor
life, and result in higher electric bills.
It is the responsibility of the electrical installer to
provide data plate operating voltage to the pump by
ensuring proper circuit sizes and wire sizes for the
specific application.
The National Electrical Code
®
(NEC
®
, NFPA-70)
requires all pool pump circuits be protected with a
Ground Fault Interrupter (GFCI). Therefore, it is also
the responsibility of the electrical installer to ensure that
the pump circuit is in compliance with this and all other
applicable requirements of the National Electrical Code
(NEC) and any other applicable installation codes.