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Edge Programable Thermostat
Fig. 39 — Typical Rooftop Unit with Humidi-MiZer Adaptive Dehumidification System with
®
EconoMi$er
X (Factory-Installed Option)
PRODUCT DESCRIPTION — The EconoMi$er X system
is an expandable economizer control system, which includes a
W7220 economizer module (controller) with an LCD and key-
pad (See Fig. 40). The W7220 can be configured with optional
sensors.
Fig. 40 — W7220 Economizer Module
The W7220 economizer module can be used as a stand-
alone economizer module wired directly to a commercial set-
back space thermostat and sensors to provide outside air dry-
bulb economizer control.
The W7220 economizer module can be connected to op-
tional sensors for single or differential enthalpy control. The
W7220 economizer module provides power and communica-
tions for the sensors.
The W7220 economizer module automatically detects sen-
sors by polling to determine which sensors are present. If a
sensor loses communications after it has been detected, the
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®
Edge
Pro Thermidistat Device
THERMOSTAT
Humidi-MiZer™ FIOP
*Connection not required.
W7220 economizer controller indicates a device fail error on
its LCD.
SYSTEM COMPONENTS — The EconoMi$er X system in-
cludes an economizer module, 20k mixed air sensor, damper
actuator, and either a 20k outdoor air temperature sensor or S-
Bus enthalpy sensors.
Economizer Module — The module is the core of the
EconoMi$er X system. The module is mounted in the unit's
control box, and includes the user interface for the system. The
W7220 economizer module provides the basic inputs and out-
puts to provide simple economizer control. When used with the
optional sensors, the economizer module provides more ad-
vanced economizer functionality.
S-Bus Enthalpy Control Sensors — The sensor is a combi-
nation temperature and humidity sensor which is powered by
and communicates on the S-Bus. Up to three sensors may be
configured with the W7220 economizer module.
CO
Sensor (optional) — The sensor can be added for De-
2
mand Controlled Ventilation (DCV).
SPECIFICATIONS
W7220 Economizer Module — The module is designed for
use with 2 to 10 Vdc or bus communicating actuator. The mod-
ule includes terminals for CO
an Outdoor Dry Bulb sensor. Enthalpy and other options are
available with bus sensors.
User Interface — Provides status for normal operation, setup
parameters, checkout tests, and alarm and error conditions with
a 2-line 16 character LCD display and four button keypad.
Electrical
Rated Voltage — 20 to 30 Vac RMS, 50/60 Hz
Transformer — 100 va maximum system input
Nominal Power Consumption (at 24 Vac, 60 Hz) — 11.5
VA without sensors or actuators
24
Unit CTB
X*
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W2
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sensor, Mixed Air sensor, and
2
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