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3.14 Initial Start Up Procedure
1.
Close discharge valve if valve is not already closed, and then crack open to assure minimal
flow. (Do not start unit with fully closed valve). On first starts care must be taken not to cause
a system water hammer.
2.
Prepare the driver for start up in accordance with the driver manufacturer's instructions.
3.
Warm up pump.
Avoid severe thermal shocks to the pump as the result of sudden liquid temperature
changes. The pump must be preheated prior to start up. Unless otherwise specified the
thermal temperature of the casing must be within 130 degrees F (55°C) of the temperature
of the liquid to be pumped at time of start up. Due to the heavy metal sections, the casing
will lag the liquid temperature during such changes, and severe temperature stresses and
subsequent misalignment of machined fits may result. Preheating is accomplished by
circulating a small amount of hot fluid through the casing by utilizing vents, drains or bypass
from discharge. Preheat pump slowly at a rate not to exceed 130 degrees F per hour (55°C
per hour).
4.
Prime pump and ensure suction valve is open.
CAUTION
Before starting or while operating the pump, the casing and suction line must be
completely filled with the liquid being pumped. The rotating parts depend on this liquid for
lubrication and the pump may seize if operated without liquid.
5.
Ensure pump recirculating line (if required) is open, clear and free of obstructions.
6.
Check that pump is vented by observing leakage from casing vent (when fitted) and seal
piping vent. Close vent (if fitted) when liquid is emitted.
7.
Turn on cooling liquid and assure correct flow exists (to cooler, insert gland etc.) as
specified.
8.
Double check pump rotation by starting unit momentarily. The direction of input shaft rotation
is counter clockwise when facing pump shaft from coupling end. Ensure that the pump
coasts to a gradual stop.
CAUTION
If pump stops abruptly when driver is shut down, investigate for pump binding. take
necessary remedial action before resuming operation.
9.
Start the driver and bring it up to speed quickly.
10. As soon as the pump is up to rated speed slowly open discharge valve.
This will avoid abrupt changes in velocity and prevent surging in the suction line.
11. Perform the operating checks
