Romlair HFS Installation And Maintenance Instructions Manual

1660 W. 139th Street, Gardena, CA. 90249
PH. 310-538-9188
SHIPPPING INSPECTION
Check unit for any damage upon delivery. Also
check to see that accessory items are included. It
is important to report any damage to the shipping
company immediately.
INSTALLATION
Move fan to desired location and fasten securely
to the roof curb. Use fasteners to suit construc-
tion and material. Fasteners are not supplied by
Romla Ventilator Company.
MOTOR AND DRIVE ACCESS
On all sizes the hood easily hinges from the base
section of the fan. Remove the two bolts on one
side of the fan base where the hood angles are
attached.
Use caution when working with the hoods.
Make sure hoods are safely secured when
servicing the fans.
ELECTRICAL
The motor's amperage and voltage rating must be
checked for compatibility to the supply voltage
prior to final electrical connection.
The electrical supply normally will come up from
the roof opening. The conduit will then be se-
cured to a disconnect switch (optional) or directly
to the motor junction box. If the wiring has to be
routed through the outside enclosure, the wiring is
to be routed through an opening in the unit
enclosure which is slightly larger than the conduit
fittings. Please note that the opening in the outer
enclosure through which the conduit would pass,
should be below the opening of the motor junction
box where the conduit would be installed. Con-
sult local code authorites for your specific require-
ment.
READ AND SAVE THESE INSTRUCTIONS
INSTALLATION AND MAINTENANCE INSTRUCTIONS
MODEL "HFS"
FILTERED AIR SUPPLY FANS
Lock off all power sources before unit is wired to
power source.
Leave enough slack in the wiring to allow for motor
movement when adjusting belt tension.
Disconnect switches are recommended. Place the
disconnect switch near the fan in order that the power
can be swiftly cut off in case of an emergency,k and in
order that maintenance personnel are provided com-
plete control of the power source.
PRE START-UP CHECKS
• Lock out all the primary and secondary power
sources.
• Inspect fasteners and setscrews, particulary those
used for mounting the unit, and tighten if necessary.
• Inspect belt tension and pulley alignment.
• Inspect motor wiring.
• Ensure the belt touches only the pulleys
• Rotate the fan propeller to ensure it does not rub
against the venturi.
• Direction of wheel rotation is critical. Reversed
rotation will result in poor air performance, motor
overloading and possible burnout. Rotation should
correspond to the rotation arrow located on the fan
propeller.