INSTALLATION
It is imperative that this unit is installed and operated with the designed airflow, gas, and electrical supply in accordance with this manual. If there are any questions about any items, please call the service department at
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. Provide clearance around installation site to safely rig and lift equipment into its final position. Supports must adequately support equipment. Refer to manufacturer’s estimated weights.
2. Consider general service and installation space when locating unit.
3. Locate unit close to the space it will serve to reduce long, twisted duct runs.
4. Do not allow air intake to face prevailing winds. Support unit above ground or at roof level high enough to prevent precipitation from being drawn into its inlet. The inlet must also be located at least 10 feet away from any exhaust
vents. The heater inlet shall be located in accordance with the applicable building code provisions for ventilation air. All air to the heater must be ducted from the outdoors. Recirculation of room air is not permitted. If in doubt regarding the application, consult the manufacturer.
Assembly
Intakes and curbs are shipped unassembled. Upon unit arrival, follow the following procedure to assemble the intake to the heater:
1. Apply silicone or
2. Screw the flanges of the intake hood or v- bank to the unit with the supplied sheet metal screws. If the unit is a modular unit with a
Curb and Ductwork
This fan was specified for a specific CFM and static pressure. The ductwork attached to this unit will significantly affect the airflow performance. Flexible ductwork and square elbows should not be used. Also, transitions and turns in ductwork near the fan outlet will cause system effect and will drastically increase the static pressure and reduce airflow. The chart below shows the minimum fan outlet duct sizes and straight lengths recommended for optimal fan performance. 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 20” above any surface. Be sure duct connection and fan outlet are properly aligned and sealed. Secure fan to curb
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