DESCRIPTION
DELHI 300 Series Blowers are designed as a quiet and efficient
outdoor roof exhauster for high-rise apartments, schools, and
commercial industrial applications. These forward curved,
double inlet blowers are enclosed in a sturdy insulated steel
cabinet and c/w a recessed bottom for mounting to an existing
curb, with discharge in any of four positions. These blowers are
belt drive.
Motor, drive installations and servicing may be completed
through a removable top cover.
Prelubricated ball bearings, motor bracket, back draft dampers , motor adjustment hardware and a dynamically balanced wheel are
standard equipment.
Model Number
Max. H.P.
Shaft Diameter
Shaft End
307
3/4
3/4"
keyway
309
3/4
3/4"
keyway
310
1-1/2
3/4"
keyway
312
2
3/4"
keyway
315
3
1"
keyway
318
5
1"
keyway
Maximum HP Ratings and Shaft Details
300 SERIES
ROOF EXHAUST
OPERATION INSTRUCTIONS AND PARTS MANUAL
PLEASE READ AND SAVE THESE INSTRUCTIONS
300 SERIES MODELS: 307, 309, 310, 312, 315, 318
GENERAL SAFETY
Rotating parts, (pulleys, shafts and belts) on fans should not be exposed. Where these components are not protected by ductwork, cabinets
or covers, appropriate guards should be employed to restrict exposure to rotating parts. Access doors should not be opened with the fan
operating to avoid foreign objects being drawn into the system. On initial start-up, a careful inspection should be carried out to ensure no
foreign material is present which could become airborne in the system.
Read installation and operation instructions carefully before attempting to install, operate or service Canarm/Delhi 300 Series. Failure to
comply with instructions could result in personal injury and/or property damage.
Retain instructions for future reference.
BEFORE YOU BEGIN
300 SERIES_03_11_22
Page 1 of 4
INSTALLATION
1. NOTE:
Check the interior of the blower housing. It should be clean and free of
debris. Rotate the blower wheel by hand. It should not rub against the housing inlet.
If rubbing occurs, loosen the set screws on the wheel hub and shift the wheel to
obtain clearance. Retighten all set screws.
2.
Establish the direction of exhauster discharge. Carefully lift the unit and position over
the existing curb. Confirm the unit is properly seated and secure into positon by
fastening through the 5/16” holes located in the unit’s skirt.
3.
Insert the exhaust cowl (air direction downward) into the channels provided on either
side of the exhaust port.
Inspect unit for damage, report any shipping damage to carrier. Check all fasteners,
re-tighten as required. Rotate the blower wheel by hand to ensure free rotation. If rubbing
occurs, loosen the set screw(s), re-position the wheel to the shaft center, re-tighten set
screws.
FIGURE 1:
Installation Method
