The 2–5 ton models are available with shut-off valves. The 8 and 10 ton models are available
with self-sealing brass refrigerant couplings. A field-split coupling kit is available for field-
split applications of 8 and 10 ton models ordered with couplings. Refer to
General Piping
Recommendations and Refrigerant Line Lengths (Form 247077-UAD-H-0209)
.
The male coupling is fastened to the condenser wall via a mounting bracket. The 8 ton unit ordered
as a single packaged unit can be field split. To separate the couplings without stressing the
refrigerant piping, use a backup wrench on the female coupling (see Figure 3).
Figure 2: Self-sealing refrigerant couplings
Figure 3: Packaged unit with couplings
Once the couplings are unscrewed, the female coupling can be pulled away and allowed to rest in
the opening. No loss of refrigerant occurs due to the spring-seal mechanism in the couplings.
Separating the units
The evaporator and condenser sections can be separated by performing the following procedures.
These procedures are for the 2–8 ton capacities only. On the 8 ton model, unscrew all four
couplings (Figure 3) with the aid of a backup wrench to separate the unit.
1. For 2–5 ton models, close all of the refrigerant isolation valves on the suction, liquid, and hot
gas bypass line (if applicable). Valves are not a backseating design. Caps are wrench tight.
13
Model DSH024C–120C Horizontal R-410A Air Conditioning Units C-Generation Smart Equipment Controller
Johnson Controls
