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6
DDC KIT
figure #4 - leaving Water Temperature location
Sensor must be on a clean surface of the
metal portion of coil
Wire ties securing sensor to pipe
figure #5 - leaving Water sensor with wire ties
Avoid sharp edges on unit cabinet during
installation
Sensor Insulating tape
figure #6 - sensor with insulating tape
8 733 900 571
Pipe Insulating tape
routing Wire harness
Rout wire harness through unit corner post and
assure wires are inside unit electrical box. Terminate
DDC digital output wires on unit terminal block
according to the provided DDC wiring diagram. On
units with ECM interface board cut provided
terminals and connect wires on ECM control board
as shown on Figure #9
Terminate DAT and LWT sensors according to DDC
wiring diagram.
Terminate DDC digital input 4 wires on Unit
Protection Module (UPM) alarm contact by using the
Dry and Hot contacts of the UPM. Set UPM jumper to
dry and the DIP switch to pulse.
THERMOSTAT
CONNECTION BLOCK
figure #8 - DDC Termination bp-Cp Models
Subject to change without prior notice
routing Wire harness
figure #7 - final sensor installation
FROM DDC CONTROL
BLU
TRANSFORMER
C
C
C
O
Y
R
G
TRANSFORMER
PRIMARY LEADS
POWER
G
LPC2
LPC1
Y
Y
HPC HPC
STATUS
R
UNIT PROTECTION MODULE
FREEZE
NO
YES
TEMP
35F
15F
LOCKOUT
4
2
RESET
R
Y
ALARM
CONT
PULSE
DRY
HOT
TEST
YES
NO
ALR
C
C
DRY HOT
C-GND
GRN
OR
G/Y
WHT
T2
T1
BLK
LEADS FROM
BLOWER MOTOR
COMPRESSOR
CONTACTOR
ORG
OR
RED
R
R
CC
ORG
OR
RED
L2
BLK
L1
Revised 05-11
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