XCI SmartZone SPC Instructions

SmartZone
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.

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.
TM

Specifications

Mounting
Set Point
Range
Field Adj.
Operate Range
Field Adj.
Release Range
Field Adj.
Operate Range
Approx. Switching
Differential
Measured Media
Maximum Pressure
Operating
Temperature
Electrical
Rating
Contact
Arrangement
Sample Line
Connections
Approval
Pitot Tube (Included)
Mount with the diaphragm in any
vertical plane. (See Figure 3)
0.05 ± 0.02" w.c. to 2.0"w.c.
0.07"w.c. to 2.0"w.c.
0.04"w.c. to 1.9"w.c.
0.07"w.c. to 2.0"w.c.
Progressive, increasing from
0.02 ± 0.01"w.c. at minimum set
set point to 0.1w.c. at maximum
set point.
Air or combustion by-products
that will not degrade silicone
½ psi (0.03 bar)
-40ºF to 180ºF (-40ºC to 82ºC)
300VA pilot duty at 115 to
277 VAC, 15 Amps non-inductive
277 VAC @ 60Hz
SPDT
¼" Barbed connectors for
flexible tubing
UL, FM, CSA, CE