ECONOMIZER
KEY
A6
A7 OUTDOOR AIR TEMP SENSOR RT26 OR OUTDOOR AIR
A62 ENTHALPY SENSOR A7 MAY BE USED.
B7 FOR DIFFERENTIAL ENTHALPY SENSING USE OUTDOOR
J10 ENTHALPY SENSOR A7 AND RETURN AIR ENTHALPY SENSOR A62.
J104 REFER ALSO TO MAIN UNIT WIRING DIAGRAM SECTION C.
J105 PROGRAMMABLE, USE FOR SYSTEM ALARM OUTPUT.
P3 FOR DIFFERENTIAL TEMPERATURE SENSING USE
P4 RT26 & RT27 SENSORS.
P104 PROGRAMMABLE, USE FOR POWER EXHAUST FAN 2 OUTPUT.
P105
RT26 WIRING DIAGRAM3/31
RT27
538242-01
DESIGNATES OPTIONAL WIRING
CLASS II FIELD WIRIN
D1 REV 0
Supersedes New Form No.
538242-01
JACK - ECONOMIZER MOTOR
ACCESSORIES
SIEMENS CONTROL ECONOMIZER (B &C-BOX)
COMPONENT
CONTROL - ECONOMIZER
SENSOR - OUTDOOR ENTHALPY
SENSOR - INDOOR ENTHALPY
MOTOR - DAMPER ECONOMIZER
SENSOR - OUTDOOR AIR TEMP
SENSOR - RETURN AIR TEMP
JACK - SENSOR OUTDOOR
JACK - SENSOR RETURN AIR
PLUG - ECONOMIZER MOTOR
PLUG - ECONOMIZER
PLUG - SENSOR OUTDOOR
PLUG - SENSOR RETURN AIR
MAT
COM
OAT
OAH
COM
AUX-
A1
RAT
RAH
S-COM
S-24V
VFD
0-10
COM
ACT-
FB
ACT
2-10
ACT-
COM
ACT-
24V
+
AUX2-
O
COM
COM
OCC
Y2O
C
R
AUX2-
I
AUX1-
O
AUX1-
I
Y2I
Y1O
Y1I
14
5
8
9
15
3
13
12
2
1
7
6
1
2
3
4
5
11
10
4
24VAC
COMMON
ACT2-10
ACT-FB
J104
B7
3
7
8
9
P3
J10
RT26
A7
A6
(POL224)
P4
2
1
3
4
5
1
2
1
2
3
4
5
A62
4
3
RED
BLACK
GRAY
PINK
1
2
3
4
1
2
2
3
3
4
P104
J104
P104
J105
P105
4
5
J104
P104
5
RT27
5
6
3
4
6
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