Honeywell Design and Application Technical Reference Manual page 118

Design and application guide for economizer controls
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Section 11 - W7220 JADE™ Economizer Module
MA TEMP
SENSOR
20K NTC
MA
MA
S-BUS
S-BUS
CO2
IAQ (2-10V)
SENSOR
IAQ COM
IAQ 24V
2-10 VDC
(OPTIONAL)
ACT (2-10V)
ACT COM
ACT 24V
TR
TR1
IN
+
-
IN
1
Fig. 8. Economizer with Sylk Bus sensors for enthalpy configuration with Honeywell
63-8594-02 Honeywell Economizers
2
W7220 ECONOMIZER CONTROLLER MODULE
M7215
OUTSIDE AIR
TEMP/HUMIDITY (ENTHALPY)
SYLKBUS SENSOR
RETURN AIR
TEMP/HUMIDITY (ENTHALPY)
SYLKBUS SENSOR
M7215 black motor.
24 VAC
IN THIS CONFIGURATION, AN OPTIONAL DISCHARGE AIR TEMP/HUMIDITY
1
(ENTHALPY) SYLKBUS SENSOR CAN BE ADDED FOR ADVANCED CONTROL
AS SHOWN IN THE LOWER LEFT OF THIS FIGURE.
2
DO NOT USE THE C7250
20K NTC SENSOR
CONFIGURATION.
3
WHEN USING A HEAT PUMP THERMOSTAT OR A PROGRAMMABLE THERMOSTAT,
THERMOSTAT TERMINALS MAY DIFFER: W1 MAY BE LABELED O OR B AND W2
MAY BE LABELED W.
4
WHEN USING A HEAT PUMP WITH DEFROST FEEDBACK, ADD AN ISOLATION
RELAY BETWEEN O AND C.
112
ROOF TOP UNIT
O/B
Y1
W1
OCC
Y2
4
1K1
AUX2-I
OCC
E-GND
AUX1-0
Y2I
Y2O
Y1I
Y1O
1K1
C R
R(+)
C(-)
3
THERMOSTAT
WITH THE OA TERMINAL IN THIS
G
W2
M32565C

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