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Installation
■ Discharge line
1. Support discharge piping so as not to directory weigh on the pump.
2. Lay a priming line when the pump is not under a flooded suction system.
3. Pipe resistance rises too high to obtain an intended flow if a discharge pipe I.D. is too long. Always take account of
the increment of pipe resistance.
4. Install a check valve in the following cases.
When selecting a check valve, check its maximum operating pressure to make sure it tolerates a possible pressure
rise due to water hammer or backflow.
•
A discharge line is too long.
•
Actual discharge head (static discharge head plus discharge pipe resistance) is more than 15m.
• The end of a discharge line is 9m higher than a liquid level in a supply tank.
• Several pumps are running in parallel.
5. Install a gate valve on a discharge line to adjust a flow rate and to protect a motor from overload. If you are to
install a check valve as necessary, it should be mounted in between the pump and the gate valve.
6. Install a pressure gauge on a discharge line.
7. Install an air vent line when a discharge line is laid long in a horizontal direction.
8. Drain
Install a drain valve if it is possible for liquid in a discharge line to freeze.
■ Wiring
Electrical wiring and any work on power source must be performed by qualified persons only. We are not responsible
for any injury and damage due to noncompliance with this notice. Contact us as necessary.
1. Install an electromagnetic switch according to motor specifications (voltage, capacity, etc.).
2. Electromagnetic switches and push buttons should be installed away from the pump.
3. If the pump is used out of doors, protect switches from rainwater.
