Titus VAB IOM - Manual (Page 5)

VAB Installation Manual
IOM-VAB-00 06-30-04
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Condensate Drain
Install unit with 1/8-inch pitch toward condensate drain
opening.
Condensate drain must consist of a minimum of ¾-inch
copper tubing, ¾-inch galvanized pipe, or ¾-inch PVC
pipe. Figure 6 shows condensate drain setup. The drain
trap must be properly configured to ensure the removal of
all condensate runoff. Ensure drain pitches downward at a
slope of one inch every 10 feet.
Note 1: Incorrect trapping can hold water in pan,
causing overflow.
Note 2: Consult local codes for additional precautions
before installing condensate drain.
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. Coils must be adequately
vented in order to prevent air binding.
Note 1: Freeze-ups due to low air temperatures are
not covered under the warranty agreement.
Note 2: Titus recommends a freeze-stat (by others) be
installed when a hot water coil is used and mounted in
the reheat position.
Installation of Options
In addition to the standard equipment, the following
optional equipment may require attention during
installation.
•
Discharge plenum.
• Return air plenum.
• Two-row hot water heating coil (reheat or preheat
location).
• Electric heat.
• Motor and drive selections.
Discharge / Return Air Plenum
The plenum can be used for either the discharge or return
air as shown in Figure 7. The construction consists of
three permanent sides and one removable panel attached
by screws. This panel may be removed to attach a grille
(not provided) or ductwork and then re-attached to the
plenum. If required, field technicians may choose to cut an
opening in one of the other three sides of the plenum.
Note: The contractor in the field determines the
opening size and location for the grille or ductwork
since they are field cut.
Figure 6. Condensate Drain
Figure 7. Optional Plenum Locations