TM 5-3895-374-24-1
GP255FH
5.
Seal all joints in the air piping. The piping must be airtight to prevent leaks which would cause the motor to run
overloaded.
6.
Ensure that the supply voltage and frequency are correct for the motor. The supply voltage at the motor terminals
must be within 10% of the nameplate value, and the frequency within 5%, for satisfactory performance of the
equipment. Low voltage or frequency will impair blower performance and can cause motor damage.
7. Connect the line leads to the motor Follow the wiring diagram on the motor. Supply the power through a properly sized
contactor or magnetic starter with thermal overload protection. Pre-sized motor starters are available from Hauck.
8.
Rotate the impeller by hand to ensure that there are no restrictions.
9.
Ensure that the three set screws on the impeller hub are tight (Refer to Maintenance Section.)
10.
Adjust the belt tension on belt drive models If the unit being installed Is direct drive, proceed immediately to step
11. It is Imperative that proper belt tension be maintained. Too little tension will cause belt slippage thus reducing
blower performance and belt life. Too much tension can produce excessive bearing loads Use the following steps
to check and adjust the belt tension.
A
Loosen and remove the bolts which hold the belt guard in place. Remove the belt guard.
BELT DEFLECTION FORCES (IN POUNDS)
INITIAL
AFTER 48 OR MORE
BELT SECTION
INSTALLATION
HOURS RUNNING
3V
8-1/4
6-3/4
5V
21
14-1/4
A
6-1/2
4-1/4
B
10-1/2
7
TORQUE
A
9-1/2
7
FLEX
B
14
9-1/2
Table 1
B. Determine the type of belt used on the blower. Hauck belt driven blowers use one of the six assemblies shown
above.
(page 3-541)
