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Table 2: Controls, Settings, and Functions (continued)
Symbol
Description
Static pressure
sensor duct #2
SPS2
Static pressure
sensor: building
(space) pressure
S1
System switch
ON-OFF-AUTO
S7
switch
McQuay IM 987
Function
Converts static pressure
signals to voltage signals
and sends them to
MicroTech III controller
Converts static pressure
signals to voltage signals.
Shuts off entire control circuit
(except crankcase heaters)
Used to manually switch unit
Reset
Location
Setting
Main control
N/A
N/A
box
Main control
N/A
N/A
box
Main control
N/A
N/A
box
Main control
N/A
N/A
box
Introduction
Range
Differential
0–5" wc
(0–1245.4 Pa)
N/A
1–6 V (dc) out
-025–0.25" wc
(-62.3–62.3
N/A
Pa)
1–5 V (dc) out
N/A
N/A
N/A
N/A
Part no.
049545007
049545006
001355000
13
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