1800-3000 USER MANUAL SECTION 4
52
OUTDOOR INSTALLATION (SHELTERED)
Many times a compressor must be installed outside
due to available space or other jobsite conditions.
When this is necessary, there are certain items that
should be incorporated into the system to help
ensure trouble-free operation. The unit must be
purchased with a TEFC motor. The standard
machine has NEMA 4 rated controls, which are
watertight.
The compressor should be on a concrete pad, which
is designed to drain water away from it. If the
concrete pad is sloped, then the compressor must be
mounted so that it is level. The base or skid must be
sealed where it contacts the concrete pad.
A weatherhood option should be selected to prevent
direct rain and snow from falling on the unit. If local
weather conditions can be extreme such that direct
rain or snow may fall on the unit, it should be in a fully
enclosed room or building.
If installed under a shelter, air-cooled machines must
be positioned in a way that prevents air recirculation
(i.e., hot exhaust being allowed back to the system
air inlet).
In installations that include more than one
compressor, hot air exhaust should not be directed
toward the fresh air intake of the second unit or an air
dryer.
A standard machine installed outside must not be
started or run if the ambient temperature in and
around the compressor drops or may drop below
35˚F (1.7˚C)
.
For installation in a below freezing climate, a low
ambient option with heat tracing and a separator/
sump tank heater must be installed.
4.3 SERVICE AIR PIPING
Review carefully the total air system before installing
a new compressor. Items to consider for the total air
system include liquid carryover, pipe sizing, and the
use of an auxiliary receiver tank. The installation of a
drip leg or multiple drip legs, installation of a line
filter(s) and the installation of isolation valve or
valves. These considerations are important to ensure
a safe and effective system. See Figure 4-1
.
NOTE
Variable speed drive compressors are
NEMA 12 rated and must not be installed
outside or exposed to the elements.
NOTE
Compressors with integral dryers can be
damaged by ambient temperatures below
freezing. The dryer electrical system is
Nema 12 rated and should not be installed
outdoors or in an unheated space, subject
to freezing temperatures.
NOTE
Compressors with integral dryers can be
damaged by ambient temperatures below
freezing. The dryer electrical system is
NEMA 12 rated and should not be
installed outdoors or in an unheated
space, subject to freezing temperatures.
NOTE
Discharged air contains a very small
amount of compressor lubricating oil, and
care should be taken to ensure that this
oil would not interfere with downstream
equipment. Downstream filters (available
from Sullair) can remove any liquid carry-
over.
To Next Page
Loading...
