Goulds Pumps 3171 - IOM - Manual (Page 27)

This indicator is used to measure parallel misalignment.
b) Attach the other indicator (A) so that the indicator rod comes into contact with the inner end of
the driver coupling half.
This indicator is used to measure angular misalignment.
P
A
Y X
2. Rotate the pump coupling half (X) in order to check that the indicators are in contact with the driver
coupling half (Y) but do not bottom out.
3. Adjust the indicators if necessary.
Align the flexible coupling with a straight edge
WARNING:
• Disconnect and lock out electrical power before installing or servicing the pump.
• When installing in a potentially explosive environment, make sure that the motor is properly certified.
• The coupling used in an ATEX classified environment must be properly certified.
Alignment of the pump and motor is of extreme importance for trouble-free mechanical operation. Straight-
edge alignment by an experienced installer is adequate for most installations. Use dial indicators for disc
couplings and applications where alignment to tighter tolerances is desirable. In these cases, use standard
dial indicator procedures.
1. Lay a straight edge across both coupling rims at four points 90° apart.
2. Move the motor until a straight edge rests evenly at each position.
3. Repeat these steps until you achieve the correct alignment.
4. Install a flexible sleeve between the hubs per the manufacturer's directions included with the pump
data package.
5. Tighten all motor bolts.
Float control installation
ITT supplies several different float controls. Refer to the float control installation instructions provided
with the controls for the proper installation procedure. This topic describes the Square D 9036 Simplex
and Square D 9038 Duplex float controls.
How float controls work
The on and off levels of the Square D 9036 simplex and the Square D 9038 duplex are controlled by
adjusting the collars (335). As the liquid level rises, the float rises to contact the upper collar and the
upward movement of the float rod causes the mechanical switch inside the control to close. This
completes the circuit to the starter. Operation continues until the liquid level drops low enough for the
float to contact the lower collar. This pulls the rod down, opening the switch and turning off the pump.
The only difference between the Square D 9036 simplex and the Square D 9038 duplex is in the operating
sequence. For the Square D 9038 duplex, the first pump starts as the water level rises. This allows the float
to contact the upper collar. When the water level drops down and shuts off the first pump, a lever arm
inside the control mechanically switches to the second pump and it comes on for the next cycle.
Installation (Continued)
Model 3171 Installation, Operation, and Maintenance Manual 25