Carrier 30RB060-390 installation instructions Safety Considerations, General, Installation

30RB060-390 Minimum Load Control Accessory

Installation Instructions

Part No: 00EFN900000100A

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equip- ment can be hazardous due to system pressures, electrical com- ponents and equipment location.

Only trained, qualified installers and service technicians should install, start up, and service this equipment.

When working on air-conditioning equipment, observe precautions in the literature, on tags, stickers, and labels attached to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Use care in handling equipment.

WARNING

Electrical shock can cause personal injury and death. Shut off all power to this equipment during installation. There may be more than one disconnect switch. Tag all discon- nect locations to alert others not to restore power until work is completed.

GENERAL

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]).

This control accessory reduces 30RB chiller capacities be- low the standard lowest capacity step. This capacity reduction provides more precise control of leaving fluid temperature during light load conditions.

The solenoid valve limits the amount of gas that can be bypassed from the condenser without impacting oil return.

One accessory package is required for 30RB060-190 units and for each module of duplex units 30RB315-390. Two accessory packages are required for 30RB210-300 units to accommodate connections for all three refrigerant circuits. See Table 1 for modular unit combinations.

Table 1 — Modular Unit Combinations

UNIT SIZE	MODULE A	MODULE B
30RBA315	30RBA160	30RBA160
30RBA330	30RBA170	30RBA160
30RBA345	30RBA170	30RBA170
30RBA360	30RBA190	30RBA170
30RBA390	30RBA190	30RBA190

NOTE: An “A” in the model number indicates the design series.

INSTALLATION

Examine the package contents for correct part numbers. If any of the components are damaged, file a claim with the shipping company and notify a Carrier representative.

See Table 2 for package contents. See Fig. 1 for dimensional drawings of tubes included in the kit.

The following material is field supplied:

•1/2 in. OD copper tubing

•standard 1/2 in. copper tube elbows and couplings as required

Install the Solenoid Valve

WARNING

Shut off all power to the unit. Lock out and safety-tag all disconnects. Remove refrigerant charge from the circuits using an approved refrigerant recovery device before proceeding with this installation. Follow good piping practices. Severe personal injury could result.

1.Shut off power to the unit.

2.Remove refrigerant charge from the unit.

3.Locate the factory-supplied stub on the discharge line for each circuit. Locate the 1/2 in. NPT pipe plugs at the blank end of the cooler for 30RB110 circuit B and for both circuits A and B on 30RB060-300 units. See Fig. 2.

4.Remove the 1/2 in. NPT pipe plugs from the blank end of the cooler. Use an appropriate thread sealing compound and install one 1 in. — 14 O-ring seal adapter for each circuit. Lightly lubricate each O-ring and attach a 5/8 in. O-ring seal tube assembly to each adapter. This nut should be torqued to 30 ft-lb (40 N- m). For 30RB110 circuit A size only, use a tubing cut- ter to cut off the end of the stub tube. See Fig. 3.

5.Assemble the hot gas bypass line in the following order:

a.Remove the discharge stub tube and braze the cor- rect beaded tube in place.

b.Braze the ball valve to the beaded tube.

c.Braze the solenoid valve into the line.

d.Using field-supplied tubing, connect the solenoid valve to the low side connection, either the cooler or the liquid line.

e.Clamp the 5/8-in. tube to the rail. See Fig. 4 and 5.

Use field-supplied 1/2 in. OD copper tubing and fit- tings (as required) to plumb from the solenoid valve outlet to either the adapter tube in the cooler or stub tube in the liquid line depending on unit size. Tube support brackets and 1/2 in. tubing clamps are provided with the kit. Install brackets to the bottom of the coil bases to support tubing.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300047-01 Printed in U.S.A. Form 30RB-16SI Pg 1 3-10 Replaces: 30RB-4SI