Titus RAB IOM - Manual (Page 9)

RAB Installation Manual
IOM-RAB-00 08-15-04
9 of 10
Installation
1. Assemble the 2 x 4 wood nailer to the short and long
roof curb frame sides using 12 x 12 Hex TEKS ® with
Neoprene fasteners and washers.
2. Bolt together, forming a rectangle, the long and short
roof curb frame sides.
Note: Leave bolts loose allowing for adjustment
later.
3. Assemble the long and short roof curb supports
using the 10 x ½ serrated head bolts.
4. Position the assembled long and short supports to
the inside of the roof curb frame.
5. Secure supports to roof curb frame using 10 x ½
with serrated 5/16 head bolts.
6. Check to be sure frame is squared.
7. Tighten fasteners, bolts and nuts.
8. Position roof curb assembly over roof opening and
check again to be sure assembly is squared.
Note: Frame must be within ¼ inch of being
squared.
9. Secure curb to structure.
10. Apply ¼ x 1-½ inch adhesive gasket material around
the roof curb top and duct cross channels.
11. Roof curb is complete and ready to receive air
handler unit.
Air Handler Startup
Check the following items before startup.
•
Ensure all shipping bolts/screws are removed and all
other bolts and screws are tight.
• Verify motor voltage and phase. Never assume the
voltage and phase on the unit nameplate is the same
as the motor wired.
• Check the alignment of the sheaves and ensure the
setscrews are tight.
• Check for proper rotation of the blower pulley.
• Check motor phase and rotation.
− Exchanging two of the three leads at the unit
junction box can reverse three-phase motor
rotation.
− Exchanging leads inside the motor junction box
can reverse the rotation of single-phase motors.
Refer to the motor nameplate.
− Not all installations require a starter (some
motors utilize a contactor).
• Ensure all filters are installed. Perform filter check
with all doors and panels in place.
• Check the amperage draw of the motor. The
amperage draw should not exceed the nameplate
amps shown on the motor serial plate.
Operation and Maintenance
Heed the following warning before operation or
maintenance.
Warning: Disconnect electrical power to all circuits
before servicing unit. Failure to do so may result in
personal injury from electrical shock or moving parts.
Return Air Filters
Inspect return air filters on a regular basis (at least
monthly). Clean or replace filters. Filters can be accessed
from either side of unit.
Caution: Never operate unit without a filter or with
filter access door removed. Damage to blower
motor may result.
Coil
The coil is easily cleaned when dry. To check or clean,
remove unit access panel, filter access door and filters.
Use accepted industry methods for cleaning. Remove all
foreign matter from pan and condensate drain line. Check
for rust and holes.
Belt and Pulley
The following list highlights items to consider for belt and
pulley maintenance and adjustment.
•
Proper pulley alignment and belt tension must be
maintained at all times.
• Reduce speed by adjusting pulley faces so the faces
are further apart.
• Increase speed by moving the faces closer together.
• Check pulley setscrews and bolts.
Motor
Proper lubrication is essential to long motor life. Use
electric motor oil or SAE20 non-detergent oil. Tighten
motor mount bracket and base bolts.
Note: Avoid over-oiling the motor. If a motor is over-
oiled, the oil may run down the motor shaft and
splatter.
Blower
Periodically check bearing for wear. Replace as required.
Check wheel for dirt accumulation and clean as required.