Separate Setpoints; Ahu Zone Control; Hardware Overview - Emerson E2 Installation And Operation Manual

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 controlling 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 economization and
dehumidification enable signals. More information on
Zone control is available in Section 11.7, Zone 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 the 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 instructions for some of the
inputs and outputs that are part of a typical AHU setup.
Inputs Sensor Type
Space Temperature Temperature
Space Humidity Humidity
Supply Air Temp Temperature
Return Air Temp Temperature
Outdoor Air Temp Temperature
Table 11-10
- Suction Group Inputs
•
11-24 E2 RX/BX/CX I&O Manual
Outdoor Air Humid
Curtailment Device
Fan Proof
Fan Proof Reset
VS Inverter Alarm
Enthalpy Switch
(Indoor and/or Out-
door)
Dewpoint Probe (for
Economization)
Mixed Air Temp (ana-
log economizers only)
Table 11-10
Wiring
Instructions
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
Set up as Out-
door Air Provider
in Global Data
Section
(see
10.17
).
Inputs Sensor Type
Humidity
Digital
Digital
Digital
Digital
Digital
Dewpoint
Temperature
- Suction Group Inputs
026-1614 Rev 4 5-JAN-2013
Wiring
Instructions
Set up as Out-
door Humidity
Provider in
Global Data (see
Section 10.17
).
Set up as Curtail-
ment in Global
Sec-
Data (see
tion 10.17
).
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3
See Table 9-1 on
page 9-3