Energy Tech Laboratories Modular Direct Fired Heaters - Manual (Page 4)

4
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 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. 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 weather-proof gasket on
the back side of the flanges of the intake
hood or v-bank intake.
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 v-bank or evaporative cooler section,
the v-bank or evaporative cooler will bolt to
the heater with the bolts provided.
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
CLEARANCES
The top, back, and front
surfaces of this heater may not
be installed less than 6” from
combustible materials. The
heater base may be installed
on combustible surfaces.
Allow 24” minimum service
clearance on both sides of this
heater.