Bryant 549J Series Installation Instructions Manual page 21

Inputs
Point Name
G Fan
Y1 Cool 1
Y2 Cool 2
W1 Heat 1
W2 Heat 2
R Power
C Common
DFT1
DFT 2
Outputs
Point Name
IFO Fan On
OF OD Fan On
RVS1
RVS2
COMP 1
COMP 2
HEAT 2
COM
Configuration
Point Name
Select Jumper
2 Compressor
Speed- - Up Configuration
Point Name
Speed --- Up Jumper
Speed --- Up Jumper
Jumper for 1- -3 seconds: Factory Test, defrost runs for 9 seconds
Jumper for 5- -20 seconds: Forced Defrost, defrost runs for 30 seconds if DFT2 is open
Defrost — The defrost control mode is a time/temperature
sequence. There are
continuous run period and the test/defrost cycle period.
The temperature component is provided by Defrost
Thermostat 1 and 2 (DFT1 and DFT2 [08- - 09 only])
mounted on the outdoor coil.
The continuous run period is a fixed time period between the
end of the last defrost cycle (or start of the current Heating
cycle) during which no defrost will be permitted. This period
can be set at 30, 60, 90 or 120 minutes by changing the
positions of DIP switches SW1 and SW2 (see Fig. 30 and
Table 6). The default run periods are 30 minutes for unit size
07 and 90 minutes for unit sizes 08- - 09.
Shorting the jumpers for a period of 5 to 20 secs bypasses
the remaining continuous run period and places the unit in
a Forced Defrost mode. If the controlling DFT is closed
when this mode is initiated, the unit will complete a
normal defrost period that will terminate when the
Switch No.
1 2
1
J
0
J
30 minutes
Table 5 – 549J Defrost Board I/O and Jumper Configurations
Type of I/O Connection Pin Number
DI, 24Vac
DI, 24Vac
DI, 24Vac
DI, 24Vac
DI, 24Vac
24Vac
24Vac
DI, 24Vac DFT--- 1 to DFT--- 1
DI, 24Vac DFT--- 2 to DFT--- 2
Type of I/O Connection Pin Number
DO, 24Vac
DO, 24Vac
DO, 24Vac P3--- 7 to P3--- 5
DO, 24Vac P3--- 6 to P3--- 4
DO, 24Vac
DO, 24Vac
DO, 24Vac
24Vac
Type of I/O Connection Pin Number
24Vac
24Vac
Type of I/O Connection Pin Number
two time components: The
Table 6 – Dip Switch Position
1 2
1
J
0
J
60 minutes
Unit Connection
P2--- 3
P2--- 5
P2--- 4
P2--- 7
P2--- 6
P3--- 1 CONTL BRD--- 8
P3--- 2 CONTL BRD--- 4
Unit Connection
P3--- 9
OF
P3--- 10 FPT --- REHEAT--- 6
P3--- 8
E--- HEAT HC --- 1 (TB4--- 1)
P3--- 3 HC --- 1 (TB4--- 3)
Unit Connection
P1--- 1
P1--- 3
Unit Connection
JMP17
JMP18
controlling DFT opens or the 10 minute defrost cycle limit
is reached. If the controlling DFT is open when this mode
is initiated, the Defrost cycle will run for 30 secs. Both
modes end at the end of the Defrost cycle.
Fig. 30 - - DIP Switch Settings — Defrost Board
1 2
1 1
0 0
J J
90 minutes
21
Note
CTB--- G
CTB--- Y1
CTB--- Y2
CTB--- W1
CTB--- W2
Note
REHEAT--- 2
OFR
Energize in COOL
Energize in COOL
REHEAT--- 8
Note
Use for 549J*07/08/09D
Note
1 2
1
J J
0
120 minutes
C09283
3
On
Off
J
Fan Delay