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Manual 2100-574
Page 14 of 23
FIGURE 1
MD4000-B CONTROLLER CONNECTIONS
1-STAGE (H**A/H**L SERIES) AIR CONDITIONERS
WITH (ECONWMT) ECONOMIZERS
System
Type
Model
Series
MD4000-B
Newer ECONWMT Economizer —
No Communication Board
MD4000-BC Newer ECONWMT Economizer
with CB4000 Communication Board
A/C with 1-Stage Compressor H**A / H**L 1 2
TABLE 1
HOOK-UP DIAGRAM SELECTION TABLE — REFERENCE FIGURE 1 SHOWN
2
E
F
2
3
E
F
3
CU, AND SILVER MUST
NOTE: ALL SENSORS ARE
POLARITY SENSITIVE. COPPER
LEAD MUST CONNECT TO
LEAD TO AG
4
R
UNIT 2
4
MD4000
CONTROLLER
REM 2
REM 1
LOCAL
AG
H2
H1
CU
AG
CU
AG
CU
F2
F1
C
W
Y1
MAIN BOARD
HUMIDITY
TERMINAL BLOCK
R
C
Y
F
A
4
5
6
Y2
G
MD4000 UNIT 1
TERMINAL BLOCK
8
6
5
4
A
F
Y
C
R
9
G
Y2
Y1
8
9
MD4000 UNIT 2
BOARD
1
BLUE/WHITE
ADVANCE
W
C
G2
G1
SMOKE
COPPER
SILVER
COPPER
SILVER
COPPER
SILVER
ALARM
GEN RUN ALARM/
1
3
FIRE/
JUMPER
REMOVE
UNIT 2
UNIT 1
NUMBER 8612-023
SENSORS, BARD PART
25 FOOT TEMPERATURE
C
OPEN ON ALARM
NOTE: DC BACK-UP POWER
OPERATE ON DC POWER ONLY
+
"NO" CONTACTS - CLOSE ON RISE
_
FIRE/SMOKE
OR CONTROLLER WILL NOT
48VDC
OPTIONAL
48VDC
2
ALARM (NC)
ECON FAIL
ALARM (NC)
ECON FAIL
DIRTY FILTER
ALARM (NC)
ALARM (NC)
OPTIONAL FIELD INSTALLED
JUMPER
30
27
MD4000
DIRTY FILTER
HUMIDITY CONTROLLER
OPTIONAL FIELD INSTALLED
TERMINAL BLOCK
2 COMP RUN ALARM
"NC" CONTACTS -
ALARM CIRCUIT
MUST BE CONNECTED AS SHOWN
R
R
41
42
43
44
45
46
7
8
6
5
4
A
F
Y
C
R
9
3
10
2
E
G
Y2
Y1
IS POLARITY SENSITIVE AND
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
30
15
ORANGE
ECON SHUTDOWN
W
10
1
LOCKOUT ALARM
LOCKOUT ALARM
41
42
43
44
45
46
47
48
46
45
44
43
42
41
DISPLAY 1
1 2 34
321
DISPLAY 2
4
ORANGE15
10
28
26
9
NO
27
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
42
43
44
45
46
47
48
NC CONTACTS
OPEN ON ALARM
NC CONTACTS
OPEN ON ALARM
REMOVE
3
2
MIS-3092 A
1
3
THE "E" AND "F" CONNECTION FOR EMERGENCY
VENTILATION ARE AVAILABLE
A/C UNITS
ALARM - REQUIRES "J" CONTROL MODULE IN
REFRIGERANT PRESSURE LOCKOUT
USE SHIELDED CABLE OR EQUIVALENT.
CONNECT SHIELD AT SPYDER ONLY