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Installation
Check the following before beginning installation :
All electric work should be performed by a qualified electrician and all national and local electrical codes
must be observed.
1. Location
(1) This pump should be installed indoors. If it is to be
used outdoors, some type of roof or covering will be
required to protect the pump from the weather.
(2) Install where inspection and maintenance can be
easily performed.
(3) Provide suitable enclosure to prevent entry of
unauthorized persons.
(4) Install pump as close to water source as possible.
Suction height (height from surface of liquid to
center of pump) should be as low as possible, and
suction piping should be short.
(5) Suction head should be less than 6 meters in certain
cases, such as with hot water, suction head must be
lower. To minimize suction piping loss, excessive
use of elbows and valves should be avoided.
2. Piping
(1) Use adequate support for suction and discharge
piping to prevent pump and motor from becoming off
center.
(2) A check valve must be installed between the pump
and the discharge valve in the following cases.
When suction piping is long; when actual head is
high; when pump is automatic; when water is being
pumped to pressure tank; and when two or more
pumps are in parallel operation.
(3) Install an air-release valve in piping to prevent the
unavoidable formation of air pockets due to
construction. Note, however, that an air-release
valve must not be installed where pressure may drop
below atmospheric pressure since the valve may
suck in air instead of expelling it.
(4) To reduce effect of water hammer install such a
device as a quick-closing check valve.
(5) Suction system:
1. The end of the suction piping should be
submerged to a depth of at least twice the
diameter (D) of the piping, and should be at a
distance between 1 to 1.5 times the diameter of
the piping from the bottom of the pit.
2 Install a foot valve at the end of the suction
piping to block the entrance of foreign matter.
3 Suction piping should be inclined upward lover
1/1001 in relation to the pump to prevent forma-
tion of air pockets. Pipe joints must be tight so
that there will be no possibility of air suction.
4 Keep suction piping as short and straight as
possible. Do not attach a sluice valve.
5 Suction pipe sizes and suction reducer sizes
should be as indicated in Table 1 . Install the
suction reducer as shown in Fig. 1 to prevent
the formation of air pockets. The suction
reducer is available as a separate special
accessory.
(6) For the influx system, we recommend that you install
a cutoff valve on the suction piping to facilitate
disassembly and inspection.
Coupling guard
Min. water level
.
S
uc
tio
n t
ota
l h
ead
(w
ithi
n 6
m)
Foot valve
1 - 1.5D
Keep short and straight
to prevent formation
of air pockets
Flexible joint
Check Valve
Sluice valve
Discharge pipe
Piping support
D
1 -
1
.5D
O
ver
2D
Piping Support
Suction pipe
PUMP
M O T O R
Model
Foot valve,
suction pipe size
Suction reducer size
50 x 40 FSA 50 -
65 x 50 FSA 65 -
80 x 65 FSA 100 100 x 80
100 x 80 FSA
100 x 65 FSA
125 125 x 100
125 x 100 FSA 150 150 x 125
150 x 125 FSA
150 x 100 FSA
200 200 x 150
200 x 150 FSA 300 x 200
250 x 200 FSA
300
300 x 250
Before insulation resistance measurement, always disconnect the power first.
WARNING
Fig. 1
Table 1