Sensor Connections; Figure 7: Existing Ez Zone Master Controller Sensor Wiring; Figure 8: New Meridian Zone Manager Sensor Wiring - York EZ Zone Upgrade Manual

036-21423-001 Rev. A (0602)

Sensor Connections

PRESSURE
SENSOR
TB12
ANALOG
INPUTS
+V
+V
1
2
3
4
5
6
7
8
G
G
To Bypass
Actuator Feedback

Figure 7: Existing EZ Zone Master Controller Sensor Wiring

Splice As
Required
Static
Pressure
Sensor
LO HI
PJ1
ANALOG
R7 INPUTS
D2 R8
+12V
D3
D4
SAT
D5
R9
RAT
D6
R10
D8
OAT
AUX1
AUX2
AUX3
GND
GND
TB3
EXHAUST
CONTACTS
N.O.
TB4
ANALOG
OUTPUTS
A1
A2
G
TB5

Figure 8: New Meridian Zone Manager Sensor Wiring

Upgrade
Splice As
Required
Static
Pressure
Sensor
LO HI
Static
Pick-up
Supply Air
Sensor
Static
Pick-up
Supply Air Temp.
Sensor
Return Air Temp.
Sensor
Outdoor Air Temp.
Sensor
EZ Zone/Meridian
The EZ Zone Master Controller sensor connec-
tions are located on the right side of the board.
Only a supply air temperature sensor and the
bypass actuator feedback are connected here.
The Meridian Zone Manager includes terminals
for connecting the following sensors:
•
Supply Air Temperature
•
Return Air Temperature
•
Outside Air Temperature
The terminals are marked SAT, RAT, and OAT
for ease of wiring. Auxiliary input terminals
AUX1, AUX2 and AUX3 are used for Econo-
mizer Disable, Dirty Filter Alarm and Forced
Occupied Mode. Bypass damper feedback has
been relocated (see next page).
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