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11-24 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013
11.6.11 Separate Setpoints
The Separate Setpoints strategy for AHU allows a Cut
In/Cut Out setpoint to be set up for each heat and cool
stage instead of just one cool and one heat setpoint set up
for each stage (Normal strategy). Dehumidification con-
trol can be performed while cont
rolling with separate set-
points.
11.6.12 AHU Zone Control
Unlike MultiFlex RTU rooftop controller applications,
AHU applications are not required to be grouped into
Zone applications (AHUs are usually large enough to be
“zones” in and of themselves).
However, if desired, you may associate an AHU Con-
trol application with a Zone application.
The AHU will
then use the Zone’s Temperature Control setpoints, occu-
pancy state, summer/winter state, and econo
mization and
dehumidification enable signals. More information on
Zone control is available in Section 11.7, Zo
ne Control.
11.6.13 Hardware Overview
To set up an AHU for control by an E2, numerous tem-
perature and humidity sensors for several different appli-
cations must be connected to th
e I/O Network, as well as
fan and cool proof checking devices, economization
checking devices, curtailment devices, and all of the heat-
ing, cooling, and dehumidification outputs.
Listed below are wiring instru
ctions for some of the
inputs and outputs that are part of a typical AHU setup.
Table 11-10
- Suction Group Inputs
Inputs Sensor Type
Wiring
Instr
uctions
Space Temperature Temperature See Table 9-1 on
page 9-3
Space Humidity Humidity See Table 9-1 on
page 9-3
Supply Air Temp Temperature See Table 9-1 on
page 9-3
Return Air Temp Temperature See Table 9-1 on
page 9-3
Outdoor Air Temp Temperature Set up as Out-
door Air Provider
in Global
Data
(see
Section
10.17
).
Outdoor Air Humid Humidity Set up as Out-
door Humidity
Provider in
Global Data (see
Section 10.17).
Curtailment Device Digital Set up as Curtail-
ment in Global
Dat
a (see
Sec-
tion 10.17
).
Fan Proof Digital See Table 9-1 on
page 9-3
Fan Proof Reset Digital See Table 9-1 on
page 9-3
VS Inverter Alarm Digital See Table 9-1 on
page 9-3
Enthalpy Switch
(Indo
or and/or Out-
door)
Digital See Table 9-1 on
page 9-3
Dewpoint Probe (for
Economization)
Dewpoint See Table 9-1 on
page 9-3
Mixed Air Temp (ana-
log economizers only)
Temperature See Table 9-1 on
page 9-3
Inputs Sensor Type
Wiring
Instructions
Table 11-10 - Suction Group Inputs