Titus HAB Horizontal Air Handler Belt Drive - Manual (Page 5)

HAB Installation Manual
IOM-HAB-00 06-30-04
Water Piping
All piping must be supported, independent of coils. Swing
joints or flexible fittings must be provided to absorb
expansion and contraction strains. Rigid piping reduces
the effectiveness of vibration isolators. The water supply
should always be connected so the entering water is on
the leaving airside of the coil. See Figure 7. Coils must be
adequately vented in order to prevent air binding.
Note: Freeze-ups due to low air temperatures are not
covered under the warranty agreement.
Sound Attenuation
Flexible duct connections should be used between the unit
and both the supply and return ducts.
Both suspended and base-mounted units require unit
vibration isolation.
Motors and Drives
Units are normally shipped with motor and drive installed.
However; when mounting a motor on the adjustable base
in the field, use extreme care to ensure proper alignment
and belt tension.
Electrical Connections
Each unit has a mounted control box and, typically, the
motor is to be wired to this box. Only ODP, single- and
three-phase motors on 800 to 2000 CFM units are factory-
wired to junction box. All other motors require field wiring
to junction box located on side of the unit cabinet.
Note: Unit must be permanently grounded in
accordance with NEC and local codes and
ordinances. See the typical wiring diagrams shown in
Figure 8.
Figure 7. Blower Coil Connections
Figure 8. Wiring Diagrams
Installation of Options
In addition to the standard equipment, the following
optional equipment may require consideration during
installation.
•
Grille plenum.
• Mixing box.
• Electric heat.
• Face and bypass damper filter section.
Grille Plenum
Figure 11 shows the setup of an HAB model and grille
plenum. The grille plenum is available in two sizes. Grille
plenums sized for the HAB08 through 20 models have one
opening, while the plenum sizes for the HAB30 through 80
models have two openings.
Preparation
• Remove shipping screws (red-headed screws).
• Remove smaller screws from the cabinet front that
align with the pre-punched ¼-inch holes of the grille
plenum. The screws aligning with the large ½-inch
holes are to remain in place.
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