Cleaveland Controls RFS-4150 Краткое руководство по эксплуатации
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Печатать страницу·Cleveland Controls
Di-".ision~of
UniControl Inc.
Model·
RFS-4150
/
AIR PRESSURE SENSING SWITCH WITH ADJUSTABLE SET POINT
APPLICATION
•'
Model RFS-4150 is a general purpose prov-
ing switch designed for HVAC and Energy
Management -applicatipns. This switch can
be used to sense positive, negative, or dif-
ferential air pressure.
GENERAL DESCRIPTION &
OPERATION
The plated
hotJsiog_contains_a__dlapbLagm~<L~
__ -------,
calibration spring, and a snap-acting switch.
The sample line connections located on
each side of the diaphragm accept
o/is", W',
and
7'\s"
flexible tubing. Various electrical
connections are available.
MOUNTING {FIG. 1)
Select a mounting location which is free
from vibration. The Model RFS-4150 must
be mounted with the diaphragm in any verti-
cal plane in order to maintain the specified
operating set point. Avoid mounting with the
sample line connections in the "up" position.
The standard model is
surface~mounted
via
th~
two round holes (0.14" dia.) or two of the
four slots (o/is" wide) on the zinc-plated strap
bracket.The mounting holes and slots are
3-Va" apart. Custom mounting configurations
are available.
Figure 1: Mount with the diaphragm in
any vertical plane.
-
-~,-~
·~
\1)
AIR SAMPLING CONNECTION
{FIG. 2)
Tri-barbed sample line connectors suitable to
accept flexible tubing are situated on either
side of the diaphragm as shown in Figure
2. The tri-barbed connectors accept ·o/is",
Y..", and
o/;s" ID flexible tubing. For sample
lines up to 10 feet in length,
11s"
ID tubing
is acceptable. For lines up to 20 feet, use
Y.."
ID tubing.
Locate the sampling probe a minimum of
Figure 2
INLET
Positive Only
Lower Negative
Higher Positive
NLETL
Negative Only
Higher Negative
Lower Positive
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~---
- - -
- - - - - - +
source. Install the sampling probe as close
to the center of the airstream as possible.
Refer to Figure 2 to identify the high pres-
sure inlet (H) and the low pressure inlet
(L).
Select one of the five application options
listed below, and connect the sample lines
as recommended.
HIGH
PRESSURE
LOW
PRESSURE
0
N.C. N.O.