46-624 Series 3 Liquid Level Switches ASME B31.1 Construction
17
12. Attach wiring and connect power supply as described in
Switch and Wiring Inspection, Section 4.2.2
on page 14.
4.2.4 Functional Test of Unit
This procedure will assure that the complete unit is
functioning properly. This test should be conducted after
switch and wiring inspections have been completed.
1. Adjust piping as required to bring control to a vertical
position. Control must be mounted within 3° of vertical.
Installation should be checked with an indicating level on
top or sides of float chamber.
2. Check the chamber mounting within 3° of vertical after
the boiler installation.
3. Raise level in the vessel sufficient to raise the float and
trip the switch. Lower level in the vessel sufficient to
lower float and reset the switch. Confirm switch trips and
resets at expected levels (contact MAGNETROL for spe-
cific information on trip points; have the serial number of
the unit readily available).
4.3
Troubleshooting
Usually the first indication of improper operation is failure
of the controlled equipment to function, i.e., pump will
not start (or stop), signal lamps fail to light, etc. When
these symptoms occur, whether at time of installation or
during routine service thereafter, check the following
potential external causes first:
• Fuses may be blown
• Reset button(s) may need resetting
• Power switch may be open
• Controlled equipment may be faulty
• Wiring leading to control may be defective
If a thorough inspection of these possible conditions fails
to locate the trouble, proceed next to a check of the
control's switch mechanism.
Model
Flange Bolting
Enclosing Tube
B3F – 150#
100 – 120 ft-lbs
200-225 ft-lbs
B3F – 300#, G3F – 150#, G3F – 300#
180 – 200 ft-lbs
B3F – 600#
300 – 320 ft-lbs
G3F – 600#, Z3F – 600#
470 – 490 ft-lbs
K3F – 600#
675 – 710 ft-lbs
Z3F – 900#
775 – 850 ft-lbs
