Lennox LGT156H Installation Instructions Manual page 15

INSTALLATIONS WITH DUCTWORK
ROOFTOP UNIT
RE­
SUPPLY
TURN
MAIN
DUCT RUN
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
BLOWER
ASSEMBLY
SLIDING BASE
LOOSEN (4) SCREWS TO
ADJUST BELT TENSION
SIDE VIEW
MOTOR
ALLEN
SCREW
PULLEY
LOCATION OF STATIC PRESSURE READINGS
RETURN AIR
READING LOCATION
FIRST BRANCH
OFF OF MAIN RUN
SUPPLY AIR
READING
LOCATION
FIGURE 14
BLOWER ASSEMBLY
BELT TENSION
ADJUSTING
SCREW
BLOWER
MOTOR
FIGURE 15
Page 15
INSTALLATIONS WITH CEILING DIFFUSERS
ROOFTOP UNIT
SUPPLY
SUPPLY AIR
READING DIFFUSER
LOCATION
TO INCREASE BELT TENSION
1-Loosen four screws securing blower motor to
sliding base.
2-Turn adjusting screw to the left, or counter­
clockwise, to move the motor downward and
tighten the belt.
3-Tighten four screws.
BLOWER
PULLEY
REMOVE SCREWS TO
SLIDE BLOWER
ASSEMBLY OUT OF UNIT
RETURN AIR
READING
RE­
LOCATION
TURN
WHEEL
508288-01 9/2022