Manual 2100-484E
Page 6 of 22
Note: All alarm relays are dry contacts rated 1A @
24VAC, 120VAC or 150VDC.
DC3002/3003 CONTROLLER CONNECTIONS
Located on Main Controller Board
Unit #1 C – 24VAC common
R – 24VAC hot
G – fan (Form A, NO)
Y1 – 1st-stage cool (Form A, NO)
Y2 – 2nd-stage cool (Form A, NO)
W – heat (Form A, NO)
Unit #2 C – 24VAC common
R – 24VAC hot
G – fan (Form A, NO)
Y1 – 1st-stage cool (Form A, NO)
Y2 – 2nd-stage cool (Form A, NO)
W – heat (Form A, NO)
Unit #3 C – 24VAC common
(DC3003 only R – 24VAC hot
and located on G – fan (Form A, NO)
Internal Alarm Y1 – 1st-stage cool (Form A, NO)
Board) Y2 – 2nd-stage cool (Form A, NO)
W – heat (Form A, NO)
F1-F2 Fire/smoke interface
Shipped with jumper installed (a)
48Vdc Back-up power input
-24Vdc or –48Vdc
-20V to –56V range
Local Main sensor, 12-inch leads
CU – copper, AG – silver
Polarity sensitive
Rem 1 Optional remote indoor sensor
CU – copper, AG – silver
Polarity sensitive
Out Optional outdoor sensor (b)
CU – copper, AG – silver
Polarity sensitive
Gen Generator interface G1-G2
Shipped with jumper installed (a)
H1-H2 Humidity controller input
Requires optional controller
Field installed
(a) These connections require either jumper or Normally
Closed (NC) relay contact at the Fire/Smoke and Generator
interface for Controller to function.
(b) Required connection if field installed DC Fan is to be used
for free cooling and no economizers are installed in HVAC
units.
DC3002/3003 CONTROLLER CONNECTIONS
Located on Internal Alarm Board AB3002
DC3002 Inputs
Lockout 1 2,3 – input from HVAC #1
Lockout 2 2, 3 – input from HVAC #2
Y Unit 1 signals when comp. #1 is active
Y Unit 2 signals when comp. #2 is active
DC3002 Alarm Outputs
Smoke/Fire Form C (SPDT)
Lockout 1 Form C (SPDT)
Refrigerant alarm HVAC #1
Lockout 2 Form C (SPDT)
Refrigerant alarm HVAC #2
Power Loss 1 Form C (SPDT)
Power loss HVAC #1
Power Loss 2 Form C (SPDT)
Power loss HVAC #2
Low Temp Form C (SPDT)
Low temperature alarm
High Temp 1 Form C (SPDT)
High temperature alarm #1
High Temp 2 Form C (SPDT)
High temperature alarm #2
Controller Form C (SPDT)
Controller failure alarm
DC3002 Control Outputs
Econ 1 E, F - Form A (NO)
See note (c )
Econ 2 E, F - Form A (NO)
See note (c )
DC Fan Form C (SPDT)
Pilot relay for DC Fan control
2nd Stage Form C (SPDT)
2nd-stage cooling alarm
(c ) Make these connections to terminals E & F in HVAC 1
and 2 respectively if desired to have economizers open for
emergency ventilation at High Temp Alarm #2 setpoint
condition.
DC3003 Inputs
Everything from DC3002 plus:
Lockout 3 2,3 – input from HVAC #3
DC3003 Alarm Outputs (on AB3003 Internal Alarm Board)
Everything from DC3002 plus:
Lockout 3 Form C (SPDT)
Refrigerant alarm HVAC # 3
Power Loss 3 Form C (SPDT)
Power loss HVAC #3
DC3003 Control Outputs
Econ 3 E, F - Form A (NO)
See note (c )
CONTROLLER INPUT/OUTPUT SPECIFICATIONS