"700" SERIES BLOWER
INSTALLATION AND MAINTENANCE INSTRUCTIONS
RECEIVING INSPECTION
Check for damage or missing parts immediately upon receipt. Ensure that wheel rotates freely.
REPORT ANY DAMAGE PROMPTLY TO CARRIER.
INSTALLATION
ELECTRICAL MOTOR & V-BELT DRIVES
Connect motor in accordance with applicable
codes. Provide properly sized motor overload
protection to protect against electrical faults and
system changes. Confirm proper motor rotation
on start-up.
Mount motor with hardware provided and install
pulleys and belt(s) with proper tension. Follow
illustrated recommendations on belt installation
below.
BELT TENSION & PULLEY ALIGNMENT
Excessive belt tension is the number 1 cause of
blower bearing failure.
Excessive deflection is an indication that the belt
is not tight enough. If not corrected, slippage
could cause loss of blower speed and belt failure
through wear.
Proper belt tension and pulley alignment are
essential for trouble free operation.
A belt should be just tight enough to avoid
slippage.
A simple "Rule of Thumb" for checking belt
tension is illustrated.
Align pulleys with a straight edge to conserve belt
life and eliminate unnecessary noise.
When the belt is grasped as shown, a total
deflection of approximately 1" should be easily
attained.
Check tension before start-up, after every pulley
adjustment and regularly thereafter.
Insufficient deflection indicates that the belt is
too tight, resulting in noise from excessive
vibration, premature bearing failure, and short
belt life. Tight belts may overload a motor that
would otherwise be adequate.
Set Screws: Ensure all set screws on both
pulleys and the blower wheel are tight.
MAINTENANCE
LUBRICATION
DELHI INDUSTRIES INC., 523 JAMES ST., DELHI, ONTARIO, CANADA N4B 2Z3 PH:(519)582-2440 FX:(519)582-0581
SE-26-1 AUGUST 1998
Insert bearings with sealed in lubricant are used on all 700 series models. No further lubrication is required.
Caulk top of curb. Place unit on curb and secure through 8 - 5/16" diameter holes located around the bottom of the unit. Tighten all set
screws.
Inspect periodically for mounting rigidity. Verify belt for wear and tension and adjust as required. Inspect wheel for any dust accumulation and
clean as indicated.
Caution - do not dislodge balancing clips. Check set screw for tightness.
Inspect filters periodically. Clean and replace as required.
