Standard and Modular Centrifugal Untempered Supply Fans Installation, Operation, and Maintenance Manual Standard Untempered Supply Fan Modular Untempered Supply Fan INLINE Filtered Supply Fan RECEIVING AND INSPECTION Upon receiving unit, check for any interior and exterior damage, and if found, report it immediately to the carrier. Also check that all accessory items are accounted for and are damage free.
TABLE OF CONTENTS WARRANTY .................................................................................................................................................. 3 INSTALLATION ............................................................................................................................................. 4 Mechanical ................................................................................................................................................ 4 Site Preparation ....
WARRANTY This equipment is warranted to be free from defects in materials and workmanship, under normal use and service, for a period of 12 months from date of shipment. This warranty shall not apply if: 1. The equipment is not installed by a qualified installer per the MANUFACTURER’S installation instructions shipped with the product, 2. The equipment is not installed in accordance with federal, state and local codes and regulations, 3. The equipment is misused or neglected, 4.
INSTALLATION It is imperative that this unit is installed and operated with the designed airflow and electrical supply in accordance with this manual. If there are any questions about any items, please call the service department at 1-866-784-6900 for warranty and technical support issues. Mechanical WARNING: DO NOT RAISE VENTILATOR BY THE INTAKE HOOD, BLOWER OR MOTOR SHAFT, OR BEARINGS – USE LIFTING LUGS PROVIDED OR A SLING Site Preparation 1.
Follow SMACNA guides and recommendations for the remaining duct run. Fans designed for rooftop installation should be installed on a prefabricated or factory built roof curb. Follow curb manufacturer’s instructions for proper curb installation. The unit should be installed on a curb and/or rail elevated not less than 14” above any surface. Be sure duct connection and fan outlet are properly aligned and sealed.
Indoor (Inline) Installation Installation with Exhaust Fan 6
Electrical Before connecting power to the fan, read and understand this entire section of this document. As-built wiring diagrams are furnished with each fan by the factory, and are attached either to the door of the unit or the blower. Electrical wiring and connections should be done in accordance with local ordnances and the National Electric Code, ANSI/NFPA70. Be sure the voltage and phase of the power supply and the wire amperage capacity is in accordance with the motor nameplate.
PSC (Permanent Split Capacitor) Motor Speed Control Some single phase direct drive fans contain speed controls that regulate the amount of voltage going to the motor. Specific PSC motors must be used in conjunction with speed controls. The speed control has a knob with an off position, and high to low range. At high speed, the speed control allows all of the line voltage to pass right to the motor. A minimum speed adjustment is provided to allow independent control of the minimum speed setting.
Fan to Building Wiring Connection 9
OPERATION Prior to starting up or operating the ventilator, check all fasteners for tightness. In particular, check the set screw in the wheel hub, bearings and the fan sheaves (pulleys). With power to the fan OFF or prior to connecting ventilator to power, turn the fan wheel by hand to be sure it is not striking the inlet or any obstacles. Re-center if necessary. Start Up Special Tools Required • • • • AC Voltage Meter Tachometer Amperage Meter Standard Hand Tools Start Up Procedure 1. 2. 3. 4. 5. 6.
Pulley Adjustment Pulley Setscrew Torque The adjustable motor pulley is factory set for the RPM specified. Speed can be increased by closing or decreased by opening the adjustable motor sheave. Two groove variable pitch pulleys must be adjusted an equal number of turns open or closed. Any increase in speed represents a substantial increase in horsepower required by the unit. Motor amperage should always be checked to avoid serious damage to the motor when the speed is varied.
Pulley Combination Chart Motor RPM 1725 1/3 to 1-1/2 HP MOTOR PULLEY AX BELTS 1VL34 Dd1 Dd2 Pd1 1.9 2.9 2 Pd2 3 Open BLOWER PULLEY AK114 TURNS ON MOTOR PULLEY PITCH DIAMETER 5 4 1/2 4 3 1/2 3 2 1/2 2 1 1/2 1 1/2 0 11 11.2 308 323 339 354 370 385 400 416 431 447 462 Dd1 2.4 Dd2 3.4 Pd1 2.6 Pd2 3.6 4 1/2 4 3 1/2 1 1/2 1 1/2 1/3 to 2 HP AX BELTS MOTOR PULLEY 1VL40 Open BLOWER PULLEY 10 - 20 IN.
Re-Circulating Control Options Manual Positioning Control (Potentiometer) The dampers can be controlled at a remote location by a manual potentiometer to any position from 20% to 100% fresh air. This will allow manually setting the dampers to match the building ventilation requirements. It will take an extra 3 control wires at the remote location. On a power failure, or if the unit is turned off, the return air damper will close by spring return.
Using the supplied rubber tubing the high side of the static pressure controller should be plumbed to the inside of the building. The low side of the static pressure controller should be plumbed to the A306 outdoor sensor. See the A306 installation instructions. A306 Outdoor Sensor Use the installation instructions shipped with the A306 outdoor sensor.
Troubleshooting The following table lists causes and corrective actions for possible problems with the fan units. Review this list prior to consulting manufacturer.
MAINTENANCE To guarantee trouble free operation of this fan, the manufacturer suggests following these guidelines. Most problems associated with fan failures are directly related to poor service and maintenance. Please record any maintenance or service performed on this fan in the documentation section located at the end of this manual. WARNING: DO NOT ATTEMPT MAINTENANCE ON THE FAN UNTIL THE ELECTRICAL SUPPLY HAS BEEN COMPLETELY DISCONNECTED General Maintenance 1.
Filter Quantity Chart Intake Size 1 Standard Sloped Size 2 Standard Sloped Size 1 Modular Sloped Size 2 Modular Sloped Size 3 Modular Sloped Size 4 Modular Sloped Size 5 Modular Sloped Size 1 V-Bank Size 2 V-Bank Size 3 V-Bank Size 4 V-Bank Size 5 V-Bank Size 1 INLINE Size 2 INLINE Size 3 INLINE 16” x 20” 2 20” x 25” 2 3 3 6 10 8 3 8 8 15 12 1 1 2 Optional Mixing Box Filters 1 2 3 4 5 Diagonal Filters Filter Quantity 4 2 4 4 9 Filter Size 10 x 16 20 x 25 15 X 20 18 X 25 14.
Start-Up and Maintenance Documentation START-UP AND MEASUREMENTS SHOULD BE PERFORMED AFTER THE SYSTEM HAS BEEN AIR BALANCED (Warranty will be void without completion of this form) Job Information Job Name Address City State Zip Phone Number Fax Number Contact Purchase Date Service Company Address City State Zip Phone Number Fax Number Contact Start-Up Date Fan Unit Information Refer to the start-up procedure in this manual to complete this section.
