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Manual 2100-574
Page 15 of 23
FIGURE 2
MD4000-BC CONTROLLER CONNECTIONS
1-STAGE (H**A/H**L SERIES) AIR CONDITIONERS
WITH (ECONWMT) ECONOMIZERS
AND WITH ALARM BOARD & CB4000 COMMUNICATION BOARD
2
E
F
2
3
E
F
3
C
3
2
1
3-3
2-3
1-3
NC
NO
CU, AND SILVER MUST
NOTE: ALL SENSORS ARE
POLARITY SENSITIVE. COPPER
LEAD MUST CONNECT TO
LEAD TO AG
NO
NUMBER 8612-023
DIRTY FILTER
48
CB4000
4
CONTROLLER
REM 2
REM 1
LOCAL
AG
H2
H1
CU
AG
CU
AG
CU
F2
9
27
F1
C
W
Y1
Y2
G
R
C
Y
F
_
FIRE/SMOKE
A
4
5
ECON FAIL
8
9
8
6
5
4
A
F
6
C
R
9
C
R
2
47
46
G
Y2
HUMIDITY
BOARD
ADVANCE
G2
G1
SMOKE
COPPER
SILVER
COPPER
Y1
ALARM (NC)
GEN RUN ALARM/
ECON FAIL
W
C
UNIT 1
W
SILVER
COPPER
1
2 COMP RUN ALARM
ALARM
45
UNIT 2
46
OPTIONAL FIELD INSTALLED
OPEN ON ALARM
NOTE: DC BACK-UP POWER
FIRE/
"NO" CONTACTS - CLOSE ON RISE
+
27
BLUE/WHITE
Y
ALARM (NC)
48VDC
OR CONTROLLER WILL NOT
30
48VDC
OPTIONAL
OPERATE ON DC POWER ONLY
ALARM (NC)
SILVER
44
43
42
10
TERMINAL BLOCK
ECON SHUTDOWN
3
REMOVE
JUMPER
1
HUMIDITY CONTROLLER
ALARM CIRCUIT
MUST BE CONNECTED AS SHOWN
JUMPER
R
R
41
42
43
44
45
46
7
8
6
5
4
A
F
Y
C
R
9
3
10
2
E
4
OPTIONAL FIELD INSTALLED
"NC" CONTACTS -
IS POLARITY SENSITIVE AND
REMOVE
SPYDER ECON
AC UNIT 1
YELLOW/RED
RED/WHITE
BLACK/WHITE
BLUE
YELLOW
YELLOW/WHITE
PURPLE
BLUE/WHITE
BROWN/WHITE
R
C
NO
9
26
28
DIRTY FILTER
G
30
ALARM (NC)
Y2
15
25 FOOT TEMPERATURE
ORANGE
LOCKOUT ALARM
LOCKOUT ALARM
41
42
43
44
45
46
47
48
UNIT 2
45
44
43
42
41
DISPLAY 1
1 2 34
321
DISPLAY 2
4
ORANGE15
10
28
26
Y1
SENSORS, BARD PART
1
UNIT 1
SPYDER ECON
RED/WHITE
BLACK/WHITE
BLUE
YELLOW
YELLOW/WHITE
PURPLE
BROWN/WHITE
YELLOW/RED
AC UNIT 2
1
E
2
3
10
G
Y2
Y1
8
W
6
5
4
R
7
9
A
F
C
Y
41
NC CONTACTS
OPEN ON ALARM
NC CONTACTS
OPEN ON ALARM
3
3
VENTILATION ARE AVAILABLE
A/C UNITS
THE "E" AND "F" CONNECTION FOR EMERGENCY
ALARM - REQUIRES "J" CONTROL MODULE IN
2
MIS-3093
1
REFRIGERANT PRESSURE LOCKOUT
USE SHIELDED CABLE OR EQUIVALENT.
CONNECT SHIELD AT SPYDER ONLY
MD4000
MD4000 UNIT 2
TERMINAL BLOCK
MD4000 UNIT 1
TERMINAL BLOCK
MD4000
MAIN BOARD