SmartZone
TM
SPC (Static Pressure Controller)
Air Pressure Sensing Switch
For use with POC and RPOC Dampers
Adjustable Air Switch Set Point Range
GENERAL DESCRIPTION
The
SPC
is a static pressure switch designed to sense positive pressure
in the plenum for the purpose of controlling modulating bypass position.
The plated housing contains a diaphragm, a calibration spring and a
snap-acting SPDT switch. The barbed sample line connections located on
each side of the diaphragm accept flexible tubing. The enclosure cover
guards against accidental contact with the live switch terminal screws and
the set point adjusting screw. The enclosure cover will accept a ½"
conduit connection.
Pitot tube
(air-probe) for mounting in plenum and 12 inches of flexible ¼”
I.D. poly tubing included with each SPC.
Specifications
Mounting
Mount with the diaphragm in any
vertical plane. (See Figure 3)
Set Point
0.05 ± 0.02" w.c. to 2.0"w.c.
Range
Field Adj.
0.07”w.c. to 2.0"w.c.
Operate Range
Field Adj.
0.04”w.c. to 1.9"w.c.
Release Range
Field Adj.
0.07”w.c. to 2.0"w.c.
Operate Range
Approx. Switching
Progressive, increasing from
Differential
0.02 ± 0.01”w.c. at minimum set
set point to 0.1w.c. at maximum
set point.
Measured Media
Air or combustion by-products
that will not degrade silicone
Maximum Pressure
½ psi (0.03 bar)
Operating
-40ºF to 180ºF (-40ºC to 82ºC)
Temperature
Electrical
300VA pilot duty at 115 to
Rating
277 VAC, 15 Amps non-inductive
277 VAC @ 60Hz
Contact
SPDT
Arrangement
Sample Line
¼” Barbed connectors for
Connections
flexible tubing
Approval
UL, FM, CSA, CE
Mounting
Select a mounting location which is free from vibration. The
SPC
must be mounted with the diaphragm in any vertical plane
in order to obtain the lowest specified operating set point. Avoid
mounting with the sample line connections in the "up" position.
Surface mount via the two 3/16" diameter holes in the integral
mounting bracket. The mounting holes are 3-7/8" apart. (See
Figure 3
)
Air Sample Connection
The
SPC
is designed to accept flexible tubing by means of
barbed 1/4” slip-on connections. A 12” piece of ¼” ID Flexible
tubing is included with the SPC as well as a Pitot Tube for
mounting in the plenum. Locate the sampling probe a minimum
of 2 feet downstream from the air source. Install the sampling
probe as close to the center of the airstream as possible. Do not
allow supply pressure to blow directly into the Pitot Tube.
Connect the provided flexible tubing to the
High-Pressure Inlet
as shown in
Figure 2
.
Pitot Tube (Included)
