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Section 11 - W7220 JADE™ Economizer Module
The W7220 is a full function economizer used
to provide a totally integrated control
system.The JADE™ Economizer System is an
expandable economizer control system, which
includes a W7220 Economizer Module
(controller) with an LCD and keypad. The
W7220 can be configured with optional
sensors.The W7220 Economizer Module can
be used as a standalone economizer module
wired directly to a commercial set back space
thermostat and sensors to provide outdoor air
dry-bulb economizer control.
The W7220 Economizer Module can be
connected to optional Sylk Bus sensors for
single or differential enthalpy control. The
W7220 Economizer Module provides power
and communications on the Sylk Bus for the
Sylk Bus sensors.
The W7220 Economizer Module automatically
detects sensors by polling the Sylk Bus to
determine which sensors are present. If a
sensor loses communications after it has been
detected, the W7220 Economizer indicates a
device fail error on its LCD.
System Components
The JADE™ Economizer System includes an
Economizer Module, 20k mixed air sensor,
damper actuator, an optional CO
either a 20k outdoor air temperature sensor or
Sylk Bus sensors for measuring Outdoor Air
and return air enthalpy, temperature, and
humidity.
Economizer Module
This is the core of the JADE™ Economizer
System and includes the user interface for the
system. The W7220 Economizer Module
provides the basic inputs and outputs to
provide simple economizer control. When
used with the optional Sylk Bus sensors, the
Economizer Module provides more advanced
economizer functionality.
63-8594-02 Honeywell Economizers
W7220 Components
Sylk Bus Sensors (optional)
The Sylk Bus Sensor is a combination
temperature and humidity sensor which is
powered by and communicates on the Sylk
Bus to the JADE™ economizer. Up to three
sensors may be configured with the JADE™
Economizer Module.
CO
A CO
Sylk Bus) can be added for Demand Control
Ventilation (DCV).
JADE™ will be in the "set up" mode
for the first 60 minutes after
powered. If a sensor for OA air or
Sylkbus device (sensor, actuator) is
disconnected during the set up
mode, the JADE™ will not alarm that
failure. The MA sensor is a system
"critical" sensor, if the MA sensor is
removed during the set up mode, the
JADE™ will alarm. After 60 minutes
the JADE™ controller will change to
operation mode and all components
removed or failed will alarm in the
operation mode.
Sensor Location and Mounting
sensor, and
2
The JADE™ Economizer W7220 uses digital
sensors for control. The C7250 temperature
sensors (MA
sensor is required for all applications and is
mounted in the mixed air section of a rooftop
unit either directly to the sheet metal using self
tapping sheet metal screws or in the air stream
using the duct mounting kit. Duct mount kit is
part number 50053060-001. Optional OA, RA
and DA
withthe W7220 on the two-wire
communication bus and can either be wired
using a two pin header or using a side
connector.
106
Sensor (optional)
2
sensor (non-communicating or non-
2
a
b
and OA
) are 20k NTC. A MA
d
Sylkbus sensors communicate
c
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