Bell & Gossett P81568D Series 1535 - Manual (Page 16)

Commissioning, Startup, Operation,
and Shutdown
Preparation for startup
WARNING:
• Failure to follow these precautions before you start the unit will lead to serious personal
injury and equipment failure.
• If the pump, motor, or piping operate at extremely high or low temperatures, then
guarding or insulation is required. Failure to follow these instructions can result in
serious personal injury or death, and property damage.
• Never operate the pump without the coupling guard correctly installed.
• Always disconnect and lock out power to the driver before you perform any installation
or maintenance tasks. Failure to disconnect and lock out driver power will result in
serious physical injury.
• Operating the pump in reverse rotation can result in the contact of metal parts, heat
generation, and breach of containment.
NOTICE:
• Verify the driver settings before you start any pump.
• Make sure that the warm-up rate does not exceed 2.5°F (1.4°C) per minute.
You must follow these precautions before you start the pump:
• Flush and clean the system thoroughly to remove dirt or debris in the pipe system in
order to prevent premature failure at initial startup.
• Bring variable-speed drivers to the rated speed as quickly as possible.
• If temperatures of the pumped fluid will exceed 200°F (93°C), then warm up the pump
prior to operation. Circulate a small amount of fluid through the pump until the casing
temperature is within 100°F (38°C) of the fluid temperature.
At initial startup, do not adjust the variable-speed drivers or check for speed governor or
over-speed trip settings while the variable-speed driver is coupled to the pump. If the
settings have not been verified, then uncouple the unit and refer to instructions supplied
by the driver manufacturer.
Pump rotation
The rotation of the pump is clockwise when viewed from the back of the motor. An arrow
shows the direction of rotation.
Prime the pump
CAUTION:
Do not run the pump dry.
NOTICE:
Do not prime the pump while it is running by letting water into it through the discharge
pipe. This method can damage the pump or motor or blow out a fuse.
Commissioning, Startup, Operation, and Shutdown
Series 1535 Installation, Operation, and Maintenance Manual 15