Carrier 30RB060-390 Install Control Wiring See and, Configure Unit for Minimum Load Control

DISCHARGE STUB

Fig. 2 — Typical Stub Tube View

COOLER STUB

Fig. 3 — Stub Tube for Circuit A of Size 110

BALL VALVE

Fig. 4 — Typical View of 5/8 in. Swage Tube, 5/8 in. Clamp and Solenoid Valve Installed

.

IMPORTANT: The valve is direction specific and must have the arrow pointing toward the cooler. The solenoid valve will not properly seat if installed backwards.

6.Dehydrate and recharge each circuit.

7.Restore power to the unit.

NOTE: When piping is completed, leak test the assembly. Then evacuate, dehydrate, and recharge the circuit using approved refrigeration practices. Be sure to use the correct type and amount of refrigerant listed in the nameplate data and base unit documentation.

Install Control Wiring (See Fig. 6 and 7)

1.One control wire harness is supplied per circuit. Secure the DIN connector end on the solenoid valve coil with the screw in the connector. Verify the square rubber gasket is in place to ensure connection remains watertight.

2.Route the other end of the cable to the main control panel (where the display is located). For the circuit A solenoid, connect leads to TB5-7 and TB5-13. For the B circuit solenoid, connect leads to TB5-8 and TB5-13. For the C circuit solenoid (30RB210-300 only), connect the leads to TB5-6 and TB5-13. In all cases the black wire from the solenoid must be connected to TB5-13 to ensure correct polarity. Incorrect polarity will damage the control boards.

3.For 30RB250-300 units only, locate fan board 3 (FB3) in the C circuit power control panel. Route the C circuit solenoid cable to the panel. Locate the orange and brown wires from channel 7 of connector J3 on this board. Connect the red wire from the solenoid to the orange wire from the board. Connect the black wire from the solenoid to the brown wire from the board.

Configure Unit for Minimum Load Control —

The control must be configured for the minimum load control operation. Use the scrolling marquee display to configure the system.

IMPORTANT: This accessory can only be used on units configured for Cooler Fluid Type (Configuration →SERV→FLUD = 1 [Water]). The minimum load control accessory (HGBP) is not allowed on units configured for Cooler Fluid Type (Configuration →SERV→FLUD = 2 [Brine]).

1.Set the Enable/Off/Remote switch to OFF position.

2.Press ESCAPE until the screen is blank and use the arrow key to select the Configuration mode LED (light emitting diode).

3.Press ENTER , then use arrow key to select the sub-mode ‘UNIT’, then press Enter key.

4.Press the down arrow key until ‘HGBP’ is displayed.

5.Press ENTER key twice. The word ‘PASS’ and ‘WORD’ will flash.

6.Press 0 1 1 1 then ENTER key so that ‘0’ flashes.

7. Use arrow keys to change value to one of the following configurations:

CONFIGURATIONDESCRIPTION

1Used during chiller start-up only

2Used during start-up and for close control of leaving fluid temperature

Used during start-up, for close control

3of the leaving fluid temperature and for high ambient unloading

3