Commercial Air Conditioner
Model: heat pump, 10SEER UNITS
29
THIS APPLIANCE EMPLOYS A DRAW-THROUGH COIL, THEREFORE A
TRAP MUST BE INSTALLED IN THE DRAIN LINE(S) TO ALLOW FOR
PROPER CONDENSATE DISPOSAL.
The condensate trap must not be the "running" type, or "R" type. A "P " trap is required.
The total workable height of this trap, in inches, must exceed the total negative pressure,
in inches of water, as measured in the return duct.
Fig.8-8
The condensate drain line must be at least 3/4 NPT, for each unit. Precautions must be
used not to over tighten the adapter at the drain pan connection, this precaution will prevent
damage to the plastic drain pan. A joint compound should be used to prevent leakage and
act as a lubricant.
When using copper tubing as a condensate line adequate caution must be taken to prevent
damage to the plastic drain pan during the soldering process. All condensate drain lines and
drain traps should be adequately insulated.
The unit and the auxiliary drain pan must be adequately elevated to insure proper drainage.
Use of a condensate removal pump is permitted when necessary. This condensate pump
should have provisions for shutting off the control voltage should a blocked drain occur. A
trap must be installed between the unit and the condensate pump.
Important:
The
evaporator coil is coated with oils that will dissolve Styrofoam and certain types of plastics.
Therefore a removal pump or float switch must not contain any of these materials.
ELECTRICAL CONNECTIONS
The required electrical power supply information is located on the series and rating plate on
the exterior of the unit. Wiring selection must be in accordance with local codes, or in
absence of local code, the National Electrical Code. A disconnect means should be
installed within sight of the unit, when required by code.
Copper wire is recommended for all electrical connections.
When an optional heat kit is installed refer to the electrical requirements in that kit.
The wiring diagram included in the heat kit must be placed over the wiring diagram on the air
handler.
All pertinent information, such as the rating plate, included in the optional heat kit must be
applied to the Air Handler as indicated.
The use of copper connections are recommended inside the control box (see UL 1995,
section 37.9).
