FRESH AIR INTAKE
This unit is equipped with a fresh air damper assembly. The damper blade is locked in the closed position when the unit is shipped from the factory. To allow the damper to operate remove the two plastic locking pins, one on each end of the blade. This will allow for maximum fresh airflow. The damper blade will now open when the indoor blower is operating. If less than maximum fresh airflow is required, reinsert the plastic pins to limit damper blade opening to desired level. Two extra pins are provided (taped to the inside of the assembly) which may be used to hold the blade in some position other than minimum or maximum position. This fresh air assembly is located in the rear of the unit and to gain access to make these adjustments remove the air filter service door.
All capacity, efficiency and cost of operation information as required for Department of Energy “Energyguide” Fact Sheets are based upon the fresh air
The
For details on energy recovery ventilation see separate section.
SERVICE LIGHT
The unit is equipped with a service light, which signals the user that service is required. The light is located in the upper control panel and is visible only when the hinged service/filter access door is open.
The Service Unit light indicates that the unit has been shut off by a high or low pressure device. This indicates that the unit needs to be serviced.
CONDENSATE DRAIN
There are two drain connections on the unit. The rear drain is the primary drain, and is located on the right lower rear panel of the unit. The optional side drain is located on the bottom right side of the unit. The side drain is shipped with a plug installed.
The side drain requires a water trap for proper drainage. See Figure 9. The drain can be routed through the floor or through the wall. If the drain is to be routed through an unconditioned space, it must be protected from freezing. The drain line must be able to be removed from the unit if it is necessary to remove the unit from the wall. When the side drain is used, the plug must be removed and installed in the rear drain outlet.
The rear drain can be used with wall thickness of up to 10 inches where a water trap can be installed between the unit and the interior wall. See Figure 10. The trap cannot extend beyond the edge of the unit or it will interfere with the wall mounting bracket. The drain can be routed through the floor or through the wall. If the drain is routed through the wall, the drain line must be positioned such that it will not interfere with the sleeve flange or the grille. See Figure 11. If the drain is to be routed through an unconditioned space, it must be protected from freezing.
OPTIONAL REAR DRAIN KITS
Optional Rear Drain Kit, Bard Model QCDS48A, is also available for these products. The optional rear drain kit offers multiple benefits that include the following:
•Allows unit to be rolled away from the sleeve without having to disconnect any hard plumbing connections.
•Allows indoor coil condensate to be easily connected to Rear Drain Box while bypassing the outdoor coil drain pan. This aids in minimizing the potential for biological growth to occur by minimizing the standing water and exposing it to warm temperatures.
See Figures 12A, 12B, 12C and 12D.
The drain box permanently mounts onto the wall sleeve and is then either piped directly outdoors, or can be piped vertically. The
NOTE: On models equipped with a refrigerant subcooler in the lower drain pan may experience a 2- 3% decrease in cooling performance and efficiency when the indoor condensate is routed around the outdoor coil drain pan/subcooler assembly. Unit rated performance and efficiency are with the indoor condensate routed to the outdoor coil pan.
There is also a heated version of the rear drain box available (Model #QCDS48H) for installation in northern climates where freezing may occur.
SEPARATE EVAPORATOR DRAIN CONNECTION (OPTIONAL)
A knockout is provided in the back right corner of the units for use when draining the evaporator drain pan separately from the condenser. This knockout is 5 inches above the back condenser drain opening. To utilize a separate evaporator drain connection remove the knockout and route the existing evaporator drain hose out this knockout and then to an appropriate drain line.
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