Step 5 - Install Accessories; Low-Ambient Operation; Minimum Load Accessory; Miscellaneous Accessories - Carrier R080-528 Installation Instructions Manual

Step 5 — Install Accessories
ELECTRICAL — Several optional control accessories are
available to provide the following features:
• control transformer
• cooler pump interlock
• remote enhanced display panel
• temperature reset (from occupied space or outdoor-air
temperature)
• CSM-III Chillervisor System Manager (multi-chiller
control)
• low-ambient control
• minimum load control
NOTE: Only one remote enhanced display is required
for 30GXN,R duplex applications. Chillervisor System Man-
ager III may not be used for multiple duplex 30GXN,R
applications.
Refer to Controls, Start-Up, Operation, Service, and Trou-
bleshooting literature and separate accessory installation in-
structions for additional information.
LOW-AMBIENT OPERATION — If outdoor ambient oper-
ating temperatures below 0° F (–18 C) for 30GXN,R080-160
units and 15 F (–9 C) for 30GXN,R153, 163, 174-350 units are
expected, addition of a low ambient kit is required. Refer to
separate installation instructions for low-ambient operation
using accessory Motormaster
MINIMUM LOAD ACCESSORY — If minimum load ac-
cessory is required, use the appropriate package. Contact your
local Carrier representative for more details. For installation
details, refer to separate installation instructions supplied with
the accessory package.
MISCELLANEOUS ACCESSORIES — For applications
requiring special accessories, the following packages are avail-
able: Control power transformer, minimum load control, sound
reduction/wind baffle/hail guard kits (see Fig. 40), external vi-
bration isolation, remote enhanced display and temperature re-
set sensor. Refer to individual accessory installation instruc-
tions for installation details.
Step 6 — Leak Test Unit —
from the factory with a full charge of R-134a. Perform a leak
test to ensure that leaks have not developed during unit ship-
ment. Dehydration of the system is not required unless the en-
tire refrigerant charge has been lost. There are a number of
O-ring face seal fittings used on the refrigerant piping. If a leak
is detected at any of these fittings, open the system and inspect
the O-ring surface for foreign matter or damage. Do not reuse
O-rings.
DO NOT OVERTIGHTEN THESE FITTINGS. Over-
tightening will result in O-ring damage.
Step 7 — Refrigerant Charge
IMPORTANT: These units are designed for use with
R-134a only. DO NOT USE ANY OTHER refrigerant in
these units.
®
V control.
These units are shipped
Fig. 40 — Accessory Sound Enclosure Dimensions
The liquid charging method is recommended for complete
charging or when additional charge is required.
When charging, circulate water through the cooler at all
times to prevent freezing. Freezing damage is considered
abuse and may void the Carrier warranty.
DO NOT OVERCHARGE system. Overcharging results in
higher discharge pressure with higher cooling fluid con-
sumption, possible compressor damage, and higher power
consumption.
The 30GXN,R units are shipped from the factory with a full
charge of R-134a. Unit should not need to be charged at instal-
lation unless a leak was detected in Step 6 — Leak Test Unit
section. If dehydration and recharging is necessary, use indus-
try standard practices or refer to Carrier Standard Service Tech-
niques Manual as required.
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