Freeze Detection And Condensate Drain - Johnson Controls RJ H Series Installation Operation & Maintenance

Freeze Detection
Set SW2-2 on the printed circuit board for applications using a closed loop antifreeze solution to "LOOP" (15°F). On applications using an
open loop/ground water system (or closed loop no antifreeze), set this dip switch to "WELL" (30°F), the factory default setting. (Refer to the
Dip Switch Field Selection table).
Condensate Drain
On vertical units, the internal condensate drain assembly consists of a drain tube which is connected to the drain pan, a 3/4-inch PVC fe-
male adapter and a flexible connecting hose. The female adapter may exit either the front or the side of the cabinet. The adapter should be
glued to the field-installed PVC condensate piping. On vertical units, a condensate hose is inside all cabinets as a trapping loop; therefore,
an external trap is not necessary.
On horizontal units, a PVC stub is provided for condensate drain piping connection. An external trap is required (see below). If a vent is
necessary, an open stand pipe may be applied to a tee in the field-installed condensate piping.
Figure 5: Horizontal Drain Connection
3/4 in. PVC tube stub
Figure 6: Unit Pitch for Drain
Vent (if needed)
3/4 in. PVC
Coupling
3/4 in. PVC
1/8 in. per foot
1.5 in.
1.5 in.
1/2'' Pitch
Drain
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RJ SERIES INSTALLATION MANUAL