Goulds Pumps 3796 i-FRAME - IOM - Manual (Page 51)

Check the rotation
WARNING:
• Operating the pump in reverse rotation can result in the contact of metal parts, heat generation, and
breach of containment.
• 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.
1. Lock out power to the driver.
2. Make sure that the coupling hubs are fastened securely to the shafts.
3. Make sure that the coupling spacer is removed.
The pump ships with the coupling spacer removed.
4. Unlock power to the driver.
5. Make sure that everyone is clear, and then jog the driver long enough to determine that the direction
of rotation corresponds to the arrow on the bearing housing, or close-coupled frame.
6. Lock out power to the driver.
Impeller-clearance check
The impeller-clearance check ensures the following:
• The pump turns freely.
• The pump operates at optimal efficiency for long equipment life and low energy consumption.
Impeller clearances (3796)
NOTICE: Do not set the maximum impeller setting to more than 0.005 in. (0.13 mm) greater than the
values in this table. Doing so may result in a significant decrease in performance.
WARNING: For pumpage temperatures greater than 200°F (93°C), you must increase the cold (ambient)
setting according to this table. Doing so prevents the impeller from contacting the casing due to
differential expansion from the higher operating temperatures. Failure to do so may result in sparks,
unexpected heat generation, and equipment damage.
The 3796 requires the impeller clearances in the following table.
Table 8: 3796 impeller clearances
Service temperature STi, MTi, LTi
in. (mm)
-20 to 200°F (-29 to 93C) 0.015 (0.38)
Up to 250°F (121°C) 0.016 (0.41)
Up to 300°F (149°C) 0.017 (0.43)
Up to 350°F (177°C) 0.019 (0.48)
Up to 400°F (204°C) 0.020 (0.51)
Up to 450°F (232°C) 0.021 (0.53)
Up to 500°F (260°C) 0.022 (0.56)
Commissioning, Startup, Operation, and Shutdown (Continued)
Model 3796 i-FRAME Installation, Operation, and Maintenance Manual 49