▪ All auxiliary connections required are connected and operational.
▪ The lubricants have been checked.
▪ After prolonged shutdown of the pump (set), the activities described in (⇨
Section 6.6 Page 48) have been carried out.
Before commissioning/starting up the pump set, make sure that the following
conditions are met:
▪ The inlet tank, inlet pipe, pump and discharge line have been primed and
vented.
▪ The valve in the inlet pipe is completely open.
▪ The valve in the discharge line is closed.
If the discharge line is equipped with a gate valve, the valve in the discharge line
may remain open as long as there is some back pressure.
▪ The connection for tapping, if applicable, is closed.
▪ If a stand-by heating system is installed, observe the logic diagram.
▪ The shut-off valves in the bypass line are open.
▪ The cooling water system is ON.
▪ The pressure of the cooling liquid at the inlet must not exceed 6 bar / 87 psi.
▪ The temperature of the cooling liquid at the outlet opening must not exceed
50 ºC / 122 ºF.
▪ All temperatures indicated are below the maximum limits.
▪ Throttle the cooling liquid flow with a shut-off element to make sure that the
propeller speed (in the cooling water sight glass) does not exceed 50 to 70
rotations per minute.
▪ Check all pipes, flanges, screwed connections and pipe unions for leakage.
6.3 Start-up
DANGER
Non-compliance with the permissible pressure and temperature limits if the pump is
operated with the suction and discharge lines closed.
Explosion hazard!
Leakage of hot or toxic fluids!
▷ Never operate the pump with the shut-off elements in the suction line and/or
discharge line closed.
▷ Only start up the pump set with the discharge-side shut-off element slightly or
fully open.
DANGER
Excessive temperatures due to dry running or excessive gas content in the fluid handled
Explosion hazard!
Damage to the pump set!
▷ Never operate the pump set without liquid fill.
▷ Prime the pump as specified.
▷ Always operate the pump within the permissible operating range.
WARNING
Pump set with high noise levels
Damage to hearing!
▷ Persons must only enter the vicinity of the running pump set if they are wearing
protective clothing/ear protection.
▷ See noise characteristics.
Checking the piping
6 Commissioning/Start-up/Shutdown
WKTR
43 of 78
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