3-2
3.2
Precautions for storage
Warning
Before hoisting the unit, refer to the catalogue or external dimensions
drawing etc. to confirm that the weight of the equipment does not
exceed the rated load limit of the hoisting equipment.
Warning
Never use the pump or attach any part while hoisting it. Otherwise, it
may fall.
Caution
Check that the floor surface at the installation location is treated with
waterproof materials and equipped with a drainage system.
If water leakage occurs, it may cause serious damage.
(1)
Install the pump in a place where the following conditions are satisfied:
• Well-ventilated place with little dust and moisture at an ambient temperature from 0°C to 40°C
• Place that is not affected by a steam outlet or salt damage
• Place that is not easily accessible to unauthorized persons or that is impossible for them to operate
the equipment from.
• Place where the water supply source is as close as possible and a suction pipe as short as possible.
• Place where a secondary disaster does not occur when water leakage occurs
• Place suitable for maintenance and inspection of the pump, where a maintenance space can be
secured
Caution
Install the pump so that the total suction head (suction suction
pipe resistance) is as small as possible within the standard specifications.
(2)
The arrow of the casing indicates the liquid flow direction. Do not install it in the reverse direction.
(3)
Install the pump vertically. Do not install it horizontally or reversely.
(4)
Firmly fix the pump with foundation bolts on level foundation concrete.
(5)
Be sure to dig a drain ditch around the pump, and apply waterproof treatment to the floor surface.
(6)
If the pump may be frozen during the winter season, be sure to take measures to protect the pump
room, or the pump, valve, pipes, etc. from freezing.
(7)
Use a material with the high-noise absorbing effect for the door and walls of the pump room. In
particular, if noise may become a problem, take measures against it.
(8)
When hoisting the pump, do not hoist the whole pump using the lifting bolts of the motor. Remove the
coupling guards on both sides, and pass two pieces of rope through the frame to hoist it, while ensuring
that the rope will not catch the terminal box or the coupling of the motor.
(9)
To prevent overheating of the internal pump components, the pump should not be used at flows below
the minimum flow rate. Do not operate the pump against a closed discharge valve for larger than a
few seconds. If the pump can be operated at a flow rate not larger than the minimum flow rate (except
when the pump is started), install a relief pipe (bypass pipe).
The curve left shows the minimum flow rate as a
percentage of the nominal flow rate in relation to the
fluid temperature.
Figure 3-2-1: Minimum nominal flow rate
