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JADE™ ECONOMIZER MODULE
13
63-2700—11
EXH1 and EXH2 wiring:
Relay Digital Output Rating at 30 Vac (maximum powerfrom Class 2 input only): 1.5A run;
3.5A inrush @ 0.45PF (200,000 cycles) or
7.5A inrush @ 0.45PF (100,000 cycles)
If the inrush or FLA amps is above listed limits OR if the fan is a line voltage fan, an external relay will be required.
If no relay is required, the EXH1 or AUX1 out is wired to one side of the fan and the other side is wired to system common
"C" on the W7220 or equipment terminal board. (W7220 powered off the system transformer).
If a relay is required, the coil of the relay would be wired between the EXH1 or AUX1 and the C terminal of the W7220.
Fig. 15. Stand-alone dry-bulb Economizer configuration with Honeywell MS7503 or MS7505 Direct Coupled
Actuator.
ROOF TOP UNIT
Y1O
Y2O
Y1I
Y2I
OCC
24 VAC
E-GND
Y1
G
W2
W1
Y2
O/B
OCC
W7220 ECONOMIZER CONTROLLER MODULE
THERMOSTAT
CO2
SENSOR
2-10 VDC
(OPTIONAL)
MAT
MAT
OAT
OAT
C R
M32564D
IAQ (2-10V)
IAQ COM
IAQ 24V
ACT (2-10V)
ACT COM
ACT 24V
3
OAT TEMP
SENSOR
20K NTC
MS7503 OR MS7505
NOTE THAT THE 20K NTC SENSOR CAN BE MOUNTED IN THE OAT TERMINALS ONLY IN THIS CONFIGURATION
.
WHEN USING A HEAT PUMP THERMOSTAT, THERMOSTAT TERMINALS MAY DIFFER: W1 MAY BE LABELED O
OR B AND W2 MAY BE LABELED W.
WHEN USING A HEAT PUMP WITH DEFROST FEEDBACK, ADD AN ISOLATION RELAY BETWEEN O AND C.
1
1
MA TEMP
SENSOR
20K NTC
R(+)
C(-)
AUX1-0
AUX2-I
2
3
2
3
1K1
1K1