FloAire High Velocity Restaurant Duty Utility Set - Manual (Page 2)

2
INSTALLATION
WARNING: DISCONNECT POWER BEFORE INSTALLING OR SERVICING.
Caution: Do not raise ventilator by its discharge duct, wheel, motor, or bearings – use a sling or
platform.
Roof Mounting (Only)
1. Ventilators are designed for installation atop a prefabricated or factory built roof curb. Follow
manufacturer’s instructions for proper curb installation.
2. If a backdraft damper is required, it should be secured within the curb using sheet metal screws,
to the bottom of a damper box or damper support flanges located below the roof deck.
CAUTION: NFPA-96 RECOMMENDS THAT DAMPERS SHOULD NOT BE
INSTALLED WHEN EXHAUSTER IS USED FOR REMOVAL OF SMOKE AND
GREASE LADEN VAPORS FROM COMMERCIAL KITCHEN EQUIPMENT.
CONSULT STATE AND LOCAL CODES FOR DETAILED REQUIREMENTS.
3. If fan is used for kitchen hood exhaust ensure discharge is at least 40 inches above the roof
surface in accordance with NFPA96.
4. Normally the power cord is brought along the roof and connected to the disconnect switch on the
outside of the unit.
5. Secure ventilator curb through vertical portion of the ventilator base assembly flange using a
minimum of eight (8) lug screws, anchor bolts, or other suitable fasteners (not furnished).
6. Before connecting fan motor to power source verify power line wiring is de-energized.
7. Connect power supply wiring to the motor as indicated on the motor nameplate or terminal box
cover. Make certain that the power source is compatible with the requirements of your
equipment.
8. Before powering up fan check ventilator wheel for free rotation.
9. Check all fasteners for tightness.
10. Re-install motor cover.
11. A drain pipe is provided for single-point drainage of water and residue. The drain pipe should be
positioned towards the roof slope. Some means for collection of this residue must be provided,
either a container directly under the trough or use of an adapter and pipe to carry the residue to a
remote collection point.
An optional grease collection box is available as an accessory item for this unit.
OPERATION
1. Before 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.
2. Start the fan up and shut it off immediately to check rotation of the wheel with the directional
arrow in the motor compartment. Fan wheel should rotate clockwise when viewed from the top.
Reversed rotation will result in poor air performance, motor overloading and possible burnout. For
units equipped with a single-phase motor check the motor wiring diagram to change rotation.
3. When the fan is started up, observe the operation and check for any unusual noises.
4. Measure fan speed with a reliable tachometer. Motor sheave (pulley) is variable pitch, and allows
for adjustment down from the RPM shown in the catalog. Excessive speed will result in motor
overloading.
5. With the air system in full operation and all ducts attached, measure the current input to the motor
and compare with the motor nameplate to determine if the motor is operating under safe load
condition.
6. Once the rpm of the ventilator has been properly set, disconnect power and recheck belt tension
and pulley alignment as described below.
7. Keep inlets and approaches to the ventilator clean and free from obstruction.