Titus LSC IOM - Manual (Page 14)

Installation - Mechanical
Duct Connections
Install all air ducts according to National Fire Protection
Association standards for the Installation of Air
Conditioning and Ventilating Systems (NFPA 90A and
90B). Install all air ducts according to the National Fire
Protection Association standards for the “Installation of Air
Conditioning and Ventilation Systems other than
Residence Type (NFPA 90A) and Residence Type Warm
Air Heating and Air Conditioning Systems (NFPA 90B).
The unit’s duct connections varies dependent on options
ordered. Titus recommends using galvanized sheet metal
ductwork with the LSC units. All duct connections should
be sealed and fasten with sheetmetal screws.
Note: Do not run screws through the removable front
panels.
Ductwork Recommendations
Follow the general recommendations listed below when
installing ductwork for the unit.
1. Discharge ductwork should run in a straight line,
unchanged in size or direction, for a minimum of 4'.
2.When making duct turns, placing takeoffs and
transitions avoid sharp turns and use proportional
splits, turning vanes, and air scoops when necessary.
3.When possible, construct, and orient supply ductwork
turns in the same direction as the fan rotation.
Piping Considerations Hydronic Coil Piping
Before installing field piping to the coil, consider the
following:
• Coil connections can be 5/8-inch O.D. (or 1/2-inch
nominal) or 7/8-inch O.D. (or ¾-inch nominal) sweat
copper connections.
• The supply and return piping should not interfere with
the auxiliary drain pan or condensate line connection.
• Supply connection should always be at the bottom of
the coil and return at the top.
• An Air Vent valve must be installed at the highest point
of the water coil to allow removal of “air pockets” inside
the coil.
•The installer must provide adequate piping system
filtration and water treatment.
• Solder the joints using bridgit lead-free solder (ASTM
B32-89) to provide a watertight connection. Avoid
overheating factory soldered joints when soldering field
connections to the coil to prevent leakage from occurring.
• Insulate all piping to coil connections as necessary after
connections and pressure test are complete.
Note: When installing a field piping package in a LSC
unit, allow sufficient room to remove the auxiliary drain
pan.
Condensate Drain Connection (If installed)
1. De-burr the pipe end before making the connection to
the drain pan.
2. Connect a 7/8-inch O.D. copper pipe or tube, with a
0.20 inch wall thickness, to the auxiliary drain pan. This
should be a mechanical connection that allows easy
removal of the auxiliary drain pan when servicing the
piping end pocket.
3 .Slide the copper pipe over the drain pan nipple and
tighten the collar on the pipe with a hose clamp (installer
supplied).
Maintain a continuous drain line pitch of one inch per ten
feet of drain line run to provide adequate condensate
drainage. Extend the drain line straight from the drain pan
a minimum distance of six inches before making any
turns. The installer must provide proper support for the
drain line to prevent undue stress on the auxiliary drain
pan.
Note: The installer is responsible for adequately
insulating field piping. See the “External Insulating
Requirements section for more information.
Hazardous Voltage!
Disconnect all electric power, including remote disconnects
and discharge all motor start/run capacitors before
servicing. Follow proper lockout/ tagout procedures to
ensure the power cannot be inadvertently energized. For
variable frequency drives or other energy storing
components provided by Titus or others, refer to the
appropriate manufacturer’s literature for allowable waiting
periods for discharge of capacitors. Verify with an
appropriate voltmeter that all capacitors have discharged.
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
WARNING
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TU-LSC-IOM