ICP DAS USA DFS2H318J2A Manuel D’Utilisation

7

 FLARING AND CONNECTING REFRIGERANT LINES

1. Remove the protective cap from the flare fitting.

2. Remove the protective cap from the tubing and cut to the

required length. Be sure that the cut is perpendicular and
clean, without burrs.

3. Slip the flare nut on the tubing and flare the tube end using

standard flaring tools.

4. Tighten the nut until resistance is met. Mark the nut and the

fitting. Using a suitable wrench tighten an additional 1/4
turn. Use the following specified torque, according to
connection size:

NOTE: The service valves on the outdoor unit must remain closed
until all 4 connections have been made.

EVACUATE TUBING AND CHARGE THE SYSTEM — When
all the fittings are connected, air must be expelled, then refriger-
ant charge must be checked and adjusted. Follow the steps below.

1. Open the service port cap on the suction line valve (large

valve of unit No. 1).

2. Connect the vacuum pump to the service port of unit No. 1

via the pressure gage and evacuate to 500 microns to
eliminate contamination and moisture.

3. Disconnect the vacuum pump. Unit should maintain 500

microns for 5 minutes.

4. Remove the service port caps from the mixed-phase valve

and suction line valve

5. Open the mixed-phase valve (small valve) with an Allen

wrench.

6. Open the suction line valve (large valve) with an Allen

wrench.

7. To evacuate  and charge unit No. 2 repeat steps 1 thru 6.

8. The outdoor unit is supplied with sufficient R-22

9. Make sure that the valves are properly opened. Be careful not

to open them more than required as this may damage the
thread.

10. Replace the service port cap. Using refrigerant oil, lubricate

the cap beam and hand tighten until resistance is met. Use a
suitable wrench to tighten the cap by an additional 1/2 turn.

  — See Tables 4 and 5 for electrical data and

Fig. 13-14 for system wiring diagrams.

 — Leak test all fittings with appropriate test equipment.

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