Aerovent IM-121 - Manual (Page 5)

Aerovent IM-121 5
Roof Fan Installation
Wall Fan Installation
1. Your wall fan is shipped with a wall mounting brack-
et. Refer to the wall fan dimensional drawing on
page 4 for mounting hole locations. Consideration
should be taken when choosing wall fan location
with regard to other buildings, parking lots, etc.
2. After drilling pilot holes, bolt the wall mounting
bracket to the wall through the holes provided on
the bracket flange using eight (8) lag bolts.
3. Position fan with the motor compartment breather
tube facing downward.
4. Run wires through conduit to switch. Leave some
slack in the wire in the motor compartment so that
the motor and wheel assembly can be lifted for
inspection and cleaning. If fan has an external dis-
connect switch (standard on restaurant units) bring
power to switch.
5. Bolt the fan base to the wall bracket using hardware
provided.
6. Make connection to the disconnect switch per
above electrical instructions.
7. Restaurant fan installation must be in compliance
with local codes and the National Fire Protection
Association’s NFPA-96.
8. Models ACXD, ATD, ATDR, ACX, ATB and ATBR are
not designed to be mounted to a wall.
Electrical Connection
1. Connect supply wiring to the disconnect switch
(non-fused standard). Check the wiring diagrams on
the motor for connections.
2. The motor is factory set at the voltage marked on
the fan nameplate. Check the line voltage with the
nameplate voltage and wiring diagrams.
3. The main power wiring should be sized for the
ampacity shown on the dataplate. Size wires in
accordance with the ampacity tables in Article 310
of the National Electrical Code. If long wires are
required, it may be necessary to increase wire size
to prevent excessive voltage drop. Wires should be
sized for a maximum of 3% voltage drop.
CAUTION: Use copper conductors only.
CAUTION: Protect wiring from sharp edges. Leave
some slack in the line to prevent damage.
4. Disconnect switches are not fused. The power leads
must be protected at the point of distribution in
accordance with the fan dataplate.
5. On fans without a thermal protector integral to the
motor (refer to unit or motor dataplate to determine
if protector is present) a separate overload device
is required. Refer to Sections 430-32 of the N.E.C.
for sizing.
6. All units must be electrically grounded in accordance
with local codes or, in the absence of local codes,
with the latest edition of the National Electrical
Code (ANSI/NFPA 70). A ground lug is provided as
standard in the unit terminal box. Size grounding
conductor in accordance with Table 250-95 of the
National Electrical Code. DO NOT use the ground
lug for connecting a neutral conductor.
7. Supply voltage to the power ventilator should not
vary by more than 10% of the value indicated
on the unit dataplate. Phase unbalance must not
exceed 2%.
WARNING: Failure of motor due to operation on
improper line voltage or with excessive phase unbal-
ance constitutes product abuse and may cause
severe damage to the unit’s electrical components.
Downblast Fans:
1. Position the fan with its wiring conduit in line with
the wiring coming up through the roof curb and
damper (if present). If the fan has an external dis-
connect switch, position the fan with the junction
box towards the power supply.
Upblast Fans:
1. Position the fan with its wiring conduit, coming
through the outer fan housing or its external discon-
nect, towards the power supply.
2. Run wires through the conduit to the switch. Leave
some slack in the wire in the motor compartment
so the motor and wheel assembly can be lifted for
inspection and cleaning.
3. Bolt the fan base to the roof curb through the holes
provided on the base using eight (8) lag bolts.
4. Make connection to the disconnect switch per
above electrical instructions.
5. Restaurant fan installation must be in compliance
with local codes and the National Fire Protection
Association’s NFPA-96.