30
Step 10 — Install All Accessories/Options —
Af-
ter all the factory-installed options have been adjusted, install all
field-installed accessories. Refer to the accessory installation in-
structions included with each accessory.
The 50A Series units have a large number of factory-in-
stalled options which were previously available only as acces-
sories. Some of the available options can also be installed in the
field if needed. In most cases the units have been pre-wired so
that the accessories can be easily installed. Instructions are
shipped with each accessory. Configuration of the controls for
these accessories as well as the factory-installed options can be
found in the Controls, Start-up, Operation, Service and Trou-
bleshooting book. The following is a list of some of the com-
mon accessories:
• Thermostats and space temperature sensors
• Accessory barometric relief damper
• Accessory power exhaust
• Non-modulating to modulating power exhaust
• Condenser coil hail guards
• Outdoor humidity sensor (used for economizer enthalpy
changeover)
• Return air humidity sensors (used for economizer differen-
tial enthalpy changeover, factory-installed with Humidi-
MiZer option)
• Return air smoke detector
• Controls expansion module (used for interface to build-
ing management systems, not typically needed on system
with Carrier Comfort Network
®
[CCN] devices)
• Plugged filter sensor
• Motormaster
®
V low ambient head pressure control
FIELD-FABRICATED WIND BAFFLES
In areas with prevailing winds of more than 5 mph and
where temperatures drop below 32°F, wind baffles must be
field fabricated to ensure proper cooling cycle operation at
low-ambient temperatures with Motormaster V controls. Baf-
fles are not needed on size 060 units with MCHX (microchan-
nel heat exchangers). See Fig. 42 for baffle details. Use 20-
gage galvanized sheet metal, or similar corrosion-resistant ma-
terial for the baffles. Use field-supplied screws to attach baffles
to unit. Screws should be
1
/
4
-in. diameter or larger. Screws
should not be more than
1
/
2
inch in length. Drill required screw
holes for mounting baffles.
Fig. 41 — Pressure Transducer Locations
a48-6983
AUXILIARY
CONTROL PANEL
PRE
SS
URE TRAN
S
DUCER
S
(IN
S
IDE OF PANEL)
IMPORTANT: Carrier recommends the installation of
field-fabricated wind baffles on all vertically oriented
condenser coils when operating in environments with
prevailing winds of more than 5 mph and where tem-
peratures drop below 32°F. See the Motormaster
accessory installation guide for instructions.
WARNING
To avoid the possibility of electrical shock, open all discon-
nects before installing or servicing this accessory.
CAUTION
To avoid damage to refrigerant coils, electrical compo-
nents, and wiring use extreme care when drilling screw
holes and screwing in fasteners.
