EZ Zone/Meridian
Upgrade
17
036-21423-001 Rev. A (0602)
Meridian Basic Wiring
Figure 2: New Meridian Basic Controller Wiring
Figure 2 below depicts the wiring schematic that should
be used for the Meridian Basic System upgrade as de-
scribed in Example 1 on pages 8 and 9 of this manual.
Be sure to pay strict attention to all warnings and cau-
tions listed on the schematic.
Warning:
See Figure 11 in this manual for
important wiring instructions
regarding Honeywell
Economizer Actuators
Zone Manager
Feedback (BK)
Close (GR)
Open (YL)
Gnd (WH)
Notes:
1.)24 VAC Must Be Connected So
That All Ground Wires Remain
Common.
3.)All Communication Wiring To Be 18
Ga. Minimum, 2 Conductor Twisted
Pair With Shield. Belden #82760 Or
Equivalent.
4.)For Individual Component Wiring See
Specific Component Wiring Diagram.
5.)It Is Recommended That All
Controllers Address Switches Are
Set Before Installation.
2.)All Wiring To Be In Accordance With
Local And National Electrical Codes
and Specifications.
RS-485
Communications To Zone
Controllers
Return Air Temp.
Sensor
Supply Air Temp.
Sensor
Line
Voltage
HV
AC
Unit
24VAC Only
Red
Blk
To Relief / Exhaust Fans
Grn
Static
Pick-up
Static
Pressure
Sensor
Splice As
Required
LO
HI
GND
24VAC
Belimo Actuator Wiring Shown.
Consult Factory For Other
Models Of Economizer Actuators.
Some Actuators Require Isolation
Transformers In Order To Prevent
Damage To The Controller Board.
WARNING!
Use Extreme Care When Wiring
Economizer Actuators
Never Connect Or Disconnect
Wiring With Power Applied!
Never Apply Power If The
Gnd ( 1 Com ) Terminal On The
Actuator Is Not Connected.
See Note 1 &2
Outdoor Air Temp.
Sensor
Aux3
Forced
Occupied
Mode
Aux1
Economizer
Disable
Aux2
Filter
Alarm
Auxiliary Inputs
( Dry Contacts )
R
G
Y1
Y2
W1
W2
Economizer Actuator
133 IN-LB
AF24-SR
1 COM
2 +
3 Y1
4 Y2
5 U
BELIMO
Actuator Wiring
Interface
Bypass Air Damper
Actuator
C
9
8
7
CABLE
R6
R5
HEAT 2
SW1
W2
W1
Y2
HEAT2
HEAT1
COOL2
COOL1
FAN
HEAT 1
COOL 2
COOL 1
C 1992
1
16
32
B
NET
2
4
8
ADD
COMM DRIVER
RS-485
75176
MADE IN U.S.A.
D17
D18
D19
D20
D21
D22
D23
D24
0
*
#
D
R
SH
T
COMM
C1
C2
+
P1
RIBBON
GND
06/11/95 03:48PM FRI
Auto-Zone COOL MODE
G
Y1
V6
V5
CLOSE
V4
V3
OPEN
GND
FDBK
FAN
CLOSE
OPEN
+
REC
+
GND
NE5090
4
5
6
KEYPAD
1
2
3
B
A
NO ALARM(S)
OCCUPIED
LCD DISPLAY
&
+
+
24VAC
TB2
POWER
+
+
+
ADJUST
5.11V
PJ1
+
+
PRESSURE
SENSOR
JACK
+5V
SIG
BUSS
EXP
TB2
A2
G
OUTPUTS
ANALOG
A1
N.O.
CONTACTS
EXHAUST
AUX3
GND
GND
AUX2
AUX1
ANALOG
SAT
OAT
RAT
INPUTS
+12V
TB12
BYPASS
BYPASS
Local Loop
Address Switch Must Always Be Set
To Address 0 on Zone Manager Board
As Shown
Zone Manager
Address Switch
These Switches Must Be
In The OFF Position
As Shown
ADD
1
2
4
8
16
32
B
NET
ADD
32
B
NET
16 8 4
1
2
OFF
>
OFF
>
RockerDown
RockerDown
75
90
60
45
