11
revised 10/09
Smog-Hog
PSH Series Model
4. OPERATION
4.1 Start-up Checks
4.1.1 INSTALLING COMPONENTS
if ionizers, collector cells and filter media were removed
for shipment or installation, refer to figure 5 for proper
installation and electrical contact alignment. filter
media is installed as after filters (after the collector
cells) with in-Place cleaning. Do not install filter
media as pre filters (before the ionizers) with in-Place
cleaning. this will reduce the effectiveness of the
wash cycle by 50 percent. the filter media is utilized
as pre and after filters if the PSH is not equipped with
in-Place cleaning. the PSH inlet plenum, if supplied
by uaS, will have baffle filters or aluminum media.
the inlet plenum should be inspected that all baffle
filters or aluminum filters are installed.
4.1.2 dUCTING CONNECTIONS
Blower speeds are factory set by the blower
manufacturer to compensate for static pressure losses
in ducting as specified by others. Starting the blower
before ducting is complete or before debris is removed
can result in motor overload or other system damage.
4.1.3 BLOWER ROTATION
for proper airflow, the blower should be operating in
the correct direction. if the blower is operating in the
reverse direction, air will move in the proper direction,
but at significantly reduced rates. to check rotation:
1. Place PSH unit off line.
2. remove blower housing from the blower to
observe the pulley rotation.
3. Place the PSH unit on line for approximately one
minute.
4. Place PSH unit off line.
5. as the blower pulley slows down, observe the
direction of rotation.
6. note directional arrow located on the blower
housing.
Extreme care should be exercised when operating
blowers with motor/drive belts exposed. Loose
fitting clothing can easily be drawn into these
moving parts.
7. if blower wheel was not rotating in the correct
direction, disengage main three-phase fused
disconnect switch.
!
WARNING
!
WARNING
do not attempt to rewire “live” electrical
connections.
8. open power panel and reverse any two of the three
wires at the terminal strip (Ll, L2, and L3).
9. engage the main three phase fused disconnect
switch and place the PSH on line, checking blower
rotation.
4.1.4 BLOWER BELT TENSION
the drive belt tension adjustment is critical within the
first 24 hours of the system exhaust blower operation.
During this 24 hour period, the initial stretch of the
belt occurs which requires a belt tension adjustment.
if this tension adjustment is not completed the belt will
wear prematurely, requiring a replacement. a drive belt
tension gage should be used for adjusting belt tension.
if fan belt tension is improper, set tension by adjusting
the motor slide base. Loosen four bolts holding the
motor to the base and turn the adjustment bolt(s) on
the base. check with a steel straight edge to make
sure that motor pulley and blower pulley is still aligned.
tighten motor mounting bolts. figure 11 illustrates
a typical motor/blower arrangement (motor/blower
configurations will vary).
Figure 11
Typical Motor/Blower Configuration
CAUTION
Improper tension on drive belts will cause
premature failure of belts.