Bell & Gossett DN0177 B Domestic Pump Centrifugal Pumps Series C35 - Manual (Page 14)

Commissioning, Startup, Operation,
and Shutdown
Prepare for startup
WARNING:
• Explosion hazard. Do not pressurize the volute beyond its pressure rating, which is 35
psi, unless otherwise specified.
• Disconnect and lock out electrical power before installing or servicing the pump.
CAUTION:
Operating the pump in reverse rotation can result in the contact of metal parts, heat
generation, and breach of containment.
1. Make sure that the unit is piped in accordance with the system design.
2. Check the power leads in accordance with the wiring diagram. Check the motor wiring
against the available voltage.
3. Install the drain plugs.
4. Prime the pump to prevent possible damage to the pump seals.
Avoid freezing conditions after the unit receiver has been filled.
5. Check for proper rotation of all three-phase motors.
Rotation must be clockwise looking down on the motor, as indicated by the directional
arrow on the pump casing. If the pump runs backwards, interchange two wires (three-
phase only).
Start the pump
CAUTION:
Never operate the pump without liquid supplied to mechanical seal. If you run a
mechanical seal dry, even for a few seconds, this can cause seal damage. Physical injury
can occur if a mechanical seal fails.
1. Throttle the plug cock or triple duty valve in the discharge line until the pressure at the
pump, while the pump is discharging, approaches the rated pressure for the pump.
2. Tighten the plug nut to secure the adjustment.
3. If the pump is used as a boiler feed pump, observe the following warning:
WARNING:
Maintain boiler safety features. When you connect the boiler feed unit
to the boiler, make sure that all boiler safety controls (burner cutoff,
etc.) are always operational. With certain control arrangements,
dedicated boiler controllers are required for the boiler feed pumps.
Failure to follow these instructions could result in serious injury, death,
or extensive property damage.
4. Bleed all air from the volute.
Where appropriate, use an air bleed line to a tank ahead of the pump.
5. Remove the start-up label, if applicable, after you have complied with the instructions
on the label.
Commissioning, Startup, Operation, and Shutdown
12 Domestic ® Pumps Centrifugal Pumps Series B35, C17, C35 Installation, Operation, and Maintenance Manual