Unit Security/Protection Accessories; Communication Accessories; Service Options; Refrigerant Circuit - Carrier 30RB060-390 Installation Instructions Manual

UNIT SECURITY/PROTECTION ACCESSORIES — For
applications with unique security and/or protection require-
ments, several options are available for unit protection.
Compressor enclosures, security grilles and hail guards are
available. Contact your local Carrier representative for more
details. For installation details, refer to separate installation
instructions supplied with the accessory package.
COMMUNICATION ACCESSORIES — A number of com-
munication options are available to meet any requirement.
Contact your local Carrier representative for more details. For
installation details, refer to separate installation instructions
supplied with the accessory package.
SERVICE OPTIONS — Two
offered to aid in servicing 30RB units, a ground fault conve-
nience outlet (GFI-CO) and a remote service port. The remote
service port is a weather-proof enclosure with a communication
port to plug in the Navigator device. Contact your local Carrier
representative for more details. For installation details, refer to
separate installation instructions supplied with the accessory
package.

Refrigerant Circuit

LEAK TESTING — Units are shipped with complete operat-
ing charge of R-410A (see Tables 3A-4B) and should be under
sufficient pressure to conduct a leak test.
CAUTION
This system uses Puron
®
higher pressures than R-22 and other refrigerants. No other
refrigerant can be used in this system. Failure to use gage
set, hoses, and recovery systems designed to handle Puron
refrigerant (R-410A) may result in equipment damage or
personal injury. If unsure about equipment, consult the
equipment manufacturer.
Perform a leak test to ensure that leaks have not developed
during unit shipment. Dehydration of the system is not required
unless the entire refrigerant charge has been lost. See Controls
and Troubleshooting literature for specific torque requirements
of refrigerant fittings. Repair any leak found using good refrig-
eration practice.
DEHYDRATION — Refer to Carrier Standard Service Tech-
niques Manual, Chapter 1, Refrigerants, Sections 6 and 7 for
details. Do not use compressor to evacuate system.
REFRIGERANT CHARGE (Refer to Tables 3A-4B) —
Immediately ahead of filter drier in each circuit is a factory-
installed liquid line service valve. Each valve has a
Schrader connection for charging liquid refrigerant. Refer to
Controls, Start-Up, Operation, Service and Troubleshooting
Guide for more information.
CAUTION
When charging, circulate water through the cooler at all
times to prevent freezing. Freezing damage is considered
abuse and may impair or otherwise negatively affect the
Carrier warranty.
additional accessories
R-410A refrigerant, which has
1
DO NOT OVERCHARGE system. Overcharging results
in higher discharge pressure possible compressor damage,
and higher power consumption.
Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.
are
BACnet* Communication Option Wiring —
The BACnet communication option uses the UPC Open con-
troller. The controller communicates using BACnet on an MS/
TP network segment communications at 9600 bps, 19.2 kbps,
38.4 kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a dai-
sy-chain configuration. Wire specifications for the cable are
22 AWG (American Wire Gage) or 24 AWG, low-capacitance,
twisted, stranded, shielded copper wire. The maximum length
is 2000 ft.
Install a BT485 terminator on the first and last controller on
a network segment to add bias and prevent signal distortions
due to echoing. See Fig. 63-65.
To wire the UPC Open controller to the BAS network:
1. Pull the screw terminal connector from the controller's
BAS Port.
2. Check the communications wiring for shorts and
grounds.
3. Connect the communications wiring to the BAS port's
screw terminals labeled Net +, Net -, and Shield.
NOTE: Use the same polarity throughout the network
segment.
4. Insert the power screw terminal connector into the UPC
Open controller's power terminals if they are not current-
ly connected.
5. Verify communication with the network by viewing a
module status report. To perform a module status report
using the BACview keypad/display unit, press and hold
the "FN" key then press the "." Key.
To install a BT485 terminator, push the BT485, on to the
BT485 connector located near the BACnet connector.
NOTE: The BT485 terminator has no polarity associated with
it.
/ -in.
4
To order a BT485 terminator, consult Commercial Products
i-Vu ® Open Control System Master Prices.
MS/TP WIRING RECOMMENDATIONS — Recommen-
dations are shown in Tables 16 and 17. The wire jacket and UL
temperature rating specifications list two acceptable alterna-
tives. The Halar specification has a higher temperature rating
and a tougher outer jacket than the SmokeGard specification,
and it is appropriate for use in applications where the user is
concerned about abrasion. The Halar jacket is also less likely to
crack in extremely low temperatures.
NOTE: Use the specified type of wire and cable for maximum
signal integrity.
* Sponsored by ASHRAE (American Society of Heating, Refrigerat-
ing, and Air-Conditioning Engineers).
71
CAUTION
CAUTION