Carrier 30GXN, R080-528 Dehydrate and Recharge Circuit, Install Control Wiring

Fig. 2 — Installing Fittings and Valves, 30HX (Typical)

30GXN,R UNITS ONLY — Using good brazing practice, braze the 5/8-in. minimum load tubing to the copper nipple on the discharge line (minimum load port) between the condenser coil and oil separator. See Fig. 1, 3A and 3B.

Step 3 — Dehydrate and Recharge Circuit —

When piping has been completed, leak test the assembly. If one of the O-ring seal fittings leaks, slowly tighten the O-ring nut until the leak stops. If this does not fix the leak, the connec- tion must be reinstalled using a new O-ring in the fitting. Con- tact your Carrier representative for assistance in locating these parts.

After leak testing, evacuate, dehydrate, and recharge the cir- cuit using an approved refrigerant recovery device. Correct type and amount of refrigerant are listed on unit nameplate and in base unit documentation.

Step 4 — Install Control Wiring

Be sure all power to the unit is off before proceeding. Lock out and safety-tag all disconnects.

Wires between field-installed components and unit control box must be enclosed in field-supplied conduit. Follow all local

codes and NEC (National Electrical Code, U.S.A.). Wire size must be no. 16 AWG (American Wire Gage) (1.5 mm2) mini- mum. See Fig. 4 and 5 for field wiring.

30HX UNITS — Remove the screws holding the right-side access panel to the unit control box. Open the right-side access panel.

Route wires through field-supplied conduit and attach the conduit to the unit control box, using a suitable conduit fitting and one of the available 7/8-in. knockout openings. Attach the other end of the conduit to the solenoid valve, using a suitable fitting. Repeat for the other circuit. See Fig. 4.

30GXN,R UNITS —Route the field-supplied water proof con- duit from the solenoid valves to the control box at the end of the unit. See Fig. 4 and 5.

ALL UNITS — Using good wiring practice, connect a white wire from the solenoid valve on circuit A to a white wire from the solenoid valve on circuit B. Connect both wires to TB2-9 (30HX) or TB4-2 (30GX).

Connect a pink wire to the solenoid valve on circuit A.

Connect a gray wire to the solenoid valve on circuit B. Con- nect both the pink and gray wires to TB5-9 for all units.

Figure 4 shows the correct location of the wiring connection points on the chiller.

3