Figure 2: Securing the corner bracket
Units are provided with couplings to mate refrigerant piping between the condenser and
evaporator sections. A unit with the hot gas bypass (HGBP) option is provided with additional
copper couplings for HGBP piping. Remove piping shipping brackets in both the condenser
and the evaporator section. The brackets secure spun copper ends in the condenser and
evaporator sections. They are only required to protect the piping during shipping. They can
be discarded in the fully assembled unit.
DANGER
Factory nitrogen-holding charge is 200 psig. This pressure must be released from the evaporator and
condenser section BEFORE cutting any refrigerant lines for installation.
4. In the evaporator and condenser, cut off the spun copper ends on each refrigerant pipe. Cut
the pipe to an appropriate length to fit the couplings.
5. Ensure that circuit 1 from the condenser connects to the circuit 1 piping in the evaporator.
Ensure that circuit 2 from the condenser connects to the circuit 2 piping. Do not cross the
circuits.
6. Following common A/C service practices, braze the copper couplings to the refrigerant pipe
using a flow of nitrogen gas (max. 1 psi) through the refrigerant piping. This flow minimizes
contamination to internal piping. Otherwise, there can be damage to the unit refrigeration
components.
Use the service gauge ports for this procedure to introduce nitrogen flow. Once the
procedure is complete, test the pressure with nitrogen (500 psig).
7. Evacuate each circuit to at least 350 microns. If the gauge pressure rises above 500 microns in
one minute, the evacuation is incomplete or the system has a leak.
8. Charge the circuit(s) to the value on the unit nameplate (or as detailed in the
13
D-Series Vertical (DSV060C-300C) Air-Cooled Self-Contained Units, C Generation with Smart Equipment Controller
Johnson Controls
