Carrier 30RC 020-060 Variable Speed Fan Control Installation Guide
30RC 020-060,
38RCS 025-050,
38RCD 025-060
Greenspeed® Variable Speed Fan Control
Installation Instructions
Part No: 30RC70004901, 30RC70005001, 30RC70005101, 30RC70005301, 30RC70005401, 30RC70005501, 30RC70005701, 30RC70005801, 30RC70005901
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location.
Only trained, qualified installers and service mechanics should install, start up, and service this equipment.
Untrained personnel can perform basic maintenance functions, such as cleaning coils. All other operations should be performed by trained service personnel. Qualified installers and service technicians are required to have been trained on the following topics when installing and servicing air-conditioning equipment with A2L refrigerant such as R-32:
- Explosive potential of A2L refrigerants
- Potential ignition sources
- Safety measures for unventilated and ventilated rooms or enclosures
- Refrigerant detectors
- Concept of sealed components and sealed enclosures according to IEC 60079-15:2010
- Correct work procedures for the following:
a. Commissioning
b. Maintenance
c. Repair
d. Decommissioning
e. Disposal
See Controls and Troubleshooting Guide for complete guidelines.
When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.
- Follow all safety codes.
- Keep quenching cloth and fire extinguisher nearby when brazing.
- Wear safety glasses and work gloves.
- Use care in handling, rigging, and setting bulky equipment.
| IMPORTANT: This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with these instructions, may cause radio interference. It has been tested and found to comply with the limits of a Class A computing device pursuant to International Standard in North America EN 61000-2/3, which are designed to provide reasonable protection against such interference when operated in a commercial environment. |
CAUTION
This system uses an A2L refrigerant (R-32) which have higher pressures than R-22 and other refrigerants. No other refrigerant can be used in this system. Failure to use gauge set, hoses, and recovery systems designed to handle refrigerant R-32 may result in equipment damage or personal injury. Refer to Check Refrigerant Circuit section of the 30RC or 38RC chiller installation instructions for guidelines on proper A2L refrigerant handling and equipment used for A2L refrigerant. If unsure about equipment, consult the equipment manufacturer.
WARNING
This product can expose you to chemicals including lead and lead components, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
WARNING
Electrical shock can cause personal injury and death. Shut off all power to this equipment during installation and service. There may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work is completed.
CAUTION
DO NOT re-use compressor oil or any oil that has been ex posed to the atmosphere. Dispose of oil per local codes and regulations. DO NOT leave refrigerant system open to air any longer than the actual time required to service the equipment. Seal circuits being serviced and charge with dry nitrogen to prevent oil contamination when timely repairs cannot be com
WARNING
DO NOT USE TORCH to remove any component. System contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and the work area should be well ventilated. Refrigerant in contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter and remove component from unit. Use a pan to catch any oil
e. Carefully un-sweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal injury or death.
GENERAL
This book contains instructions for the installation of the Greenspeed Variable Speed Fan Control.
The Greenspeed accessory uses a single variable frequency drive (VFD) to control the speed of the condenser fans. All fans will operate at the same speed. This can reduce energy usage and noise at off design conditions. The VFD is controlled on the unit LEN bus. The PIC6 controller on the unit monitors all pressure and temperature inputs to determine the most efficient and stable fan speed. Typically the fan speed will increase with high ambient temperature to reduce head pressure. Opposite is true for lower ambient temperatures.
This accessory will also allow the unit to run down to –20°F ambient with the addition of the wind baffle accessory. At low ambient conditions, high winds can have a detrimental effect on head pressure control. The wind baffles prevent wind from blowing across the condenser coil to alleviate this issue.
IMPORTANT: Wind baffles are required for ambient temperatures below 35°F if wind velocity is anticipated to be greater than 5 mph (8 km/h).
Table 1 — Greenspeed® Accessory Usage
Inspect Shipment
Inspect contents of the accessory package before installing. File a claim with the shipping company if there is shipping damage. Contact your local Carrier Representative if any parts are missing. See Table 1 for Greenspeed accessory usage. See Table 2 for VFD Usage and Table 3 for accessory package contents.
Table 2 — VFD Usage
Table 3 — Accessory Package Contents
INSTALLATION
Step 1 — Install Wind Baffle Accessory Kit
If the chiller is expected to run in ambient temperatures below 35°F and winds above 5 mph are expected, a wind baffle accessory kit is required. See below for part numbers that require the wind baffle accessory kit.
- 30RA-900—065 (sizes 020, 035, 040)
- 30RA-900—066 (sizes 020, 030, 045-060)
NOTE: Unit sizes 035-060 require two kits.
Step 2 — Mount the VFD
Verify the drive nameplate rating versus the unit nameplate rating for correct voltage range. Check the VFD part number from Table 2.
Remove panel on side of unit where VFD will be mounted. This panel can be discarded. See Fig. 1.
Mount VFD to VFD mounting bracket using 6 mm thread form ing screw. Attach drive enclosure to mounting plate using sheet metal screw. See Fig. 2.
Connect 3 conduit assemblies to the 3 holes on the side of the en closure. Conduit nut should be on the inside of the enclosure, to wards the VFD, and conduit should be outside of the enclosure.
Place drive inside unit enclosure and mount to unit base. Use 5/16 x 1 screws for VFD mounting plate and sheet metal screw for enclosure. On most units the VFD assembly can be rotated to fit through the VFD opening in the unit side panel. On some of the smaller units where internal piping may interfere with this proce- dure, the side panel of the unit should be removed. If removing the side panel, brace the weight of the control panel to prevent dam age to the center post of the unit. The VFD assembly enclosure will be flush with side panel on 20-30 ton units after mounting. On 35-60 ton units, the enclosure will mount with a 1 in. gap between the enclosure and the side panel.
CAUTION
Internal refrigerant tubing is under high pressure. Do not damage piping while mounting VFD assembly. Serious injury may occur.
20-30 TON UNITS
Fasten drive enclosure to unit side panel using sheet metal screws.
35-60 TON UNITS
Use spacer brackets to mount VFD assembly to unit side panel. Attach with sheet metal screws. See Fig. 3.
Step 3 — Control Panel Wiring
- Mount fuse block, terminal block, and terminal block cover per panel layout. See Fig. 4 and 5. Wiring for 20-30 ton units will require fuse blocks and fuses that already exist in the panel. Fan contactors may be removed if more panel space is needed. If contactors are removed, remove any power wires attached to them. Control wires may be cut and terminated to assure they cannot ground to panel.
- Replace fan motor cables with cables supplied. Connect con trol box end to VFD terminal block installed in “Mount the VFD” on page 6. See Fig. 6 for identification of fan motor designations. Use wire ties to secure fan wire routing. At fan motor, ensure a drip loop is created when routing the wire to the motor. See Fig. 7.
- Install Greenspeed harness between control panel and VFD. This consists of two cables. One cable takes power from the
- Install communication cable (LEN) between control panel and VFD. Connect per markings on the harness. Ground the shield at the VFD. Do not ground it in the control panel. Do not run communication cable with power wires to the VFD. This could cause interference with the communication signal.
- Install fuses into fuse block. See Table 4.
Table 4 — Fuse Replacement
Step 4 — Setup
Once all wiring is terminated and all covers are back in place, power unit. See Fig. 8-10.
Set the address on the variable frequency drive (VFD) to 184. (Pa- rameter 8-31 = 184) This will allow the controller to send correct operating parameters to the VFD. See Fig. 9.
At the PIC6 controller, configure the unit for Greenspeed control.
(MainMenu→Configuration→Factory→vfan_sel =1).
NOTE: This will require a reboot of the controller.
| IMPORTANT: The control power must be cycled with the correct VFD address and correct controller configuration before the variable speed fans will operate. |
In the controller menu go to Quick Test1 (MainMenu→Quick Test1). Enable the quick test menu. Scroll down to Q-VFAN. Enter 50 to drive fans to 50%. Fans should start and run at 30 Hz. This confirms the fan VFD is operational. Enter 0 for Q-VFAN and disable quick test. See Fig. 8.
Install grill over VFD opening. Unit is now ready for operation.
© 2024 Carrier
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300279-01
Printed in U.S.A.
Form No. 30-6ASI
5-24
Replaces: NEW
Documents / Resources
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Carrier 30RC 020-060 Variable Speed Fan Control [pdf] Installation Guide 30RC70004901, 30RC70005001, 30RC70005101, 30RC70005301, 30RC70005401, 30RC70005501, 30RC70005701, 30RC70005801, 30RC70005901, 30RC 020-060 Variable Speed Fan Control, 30RC 020-060, Variable Speed Fan Control, Speed Fan Control, Fan Control, Control |
