28 RT-SVX23D-EN
Installation
• Connect properly sized control wiring to the proper termination points between the zone
thermostat and the unit control panel.
Condensate Drain Configuration
An evaporator condensate drain connection is provided on each unit. Refer to Figure 4 for the
appropriate drain location.
The condensate drain pan is factory installed to drain condensate to the back side of the unit. See
Figure 8, p. 18 and Figure 10, p. 19. It can be converted to drain condensate out the front side of the
unit or through the base.
To convert drain condensate out the front of unit:
1. Remove evaporator access panel and supply air access panels.
2. Remove the support panel that the condensate drain pan exits through.
3. Slide the condensate drain pan out of the unit and rotate 180°.
4. Slide the condensate drain pan back into the unit, align the drain with the grommeted opening
in the rear support panel and push until the coupling is seated in the grommet.
5. Replace the front support panel by aligning the panel with tabs in the raceway. Align the
condensate drain pan support in the grommeted hole as the panel is put in place.
6. Replace evaporator access panel and supply air access panels.
To convert drain condensate through the base of unit:
1. Remove evaporator access panel and supply air access panels.
2. Remove the support panel that the condensate drain pan exits through.
3. Slide the condensate drain pan out of the unit.
4. Place on a level surface in the position it was removed from the unit.
5. Remove the plug knockout in the bottom of the drainpan to convert it to through the base
drainage.
6. Plug the original condensate drain opening with a field supplied 3/4" NPT plug.
7. Slide the condensate drain pan back into the unit, align the drain support with the grommeted
opening in the rear support panel and push until the support is seated in the grommet.
8. Replace the front support panel by aligning the panel with tabs in the raceway. Align the
plugged condensate drain pan coupling in the grommeted hole as the panel is put in place.
9. Replace evaporator access panel and supply air access panels.
A condensate trap must be installed at the unit due to the drain connection being on the “negative
pressure” side of the fan. Install the P-Trap using the guidelines in Figure 21, p. 29.
A condensate drain line must be connected to the P-Trap. Pitch the drain lines at least 1/2 inch for
every 10 feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run
to sag causing a possible double-trap condition which could result in condensate backup due to “air
lock”.
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