88
11. COMMUNICATING ECM MOTOR COMMUNICA-
TIONS (CONTROL) CONNECTION (P4)
This connector sends and receives messages to and
from the blower motor through a single peer-to-peer
network. The blower motor does not communicate on
the same communications buss as the furnace, con-
denser (or heat-pump) and thermostat. Further, a dif-
ferent communications protocol is used.
12. DIPSWITCHES; S1, S2 AND S3
NOTES:
1. There is a protective cover over the dipswitches
that must be penetrated to change the dipswitch
position. Use a pen or similar tool to penetrate the
cover and change the position. This is normal and
penetration of the protective cover will not damage
the dipswitch.
INTE
GRATE
D FURNACE
CONTROL
H
U
M
I
D
I
F
I
C
A
T
I
O
N
/
D
E
H
U
M
I
D
I
F
I
C
A
T
I
O
N
Communicating Furnace
F
IGURE 48
W
IRING FOR OPTIONAL DE-HUMIDIFICATION AND HUMIDIFICATION WITH OPTIONAL HUMIDIFIER (HUMIDIFIER WITH INTERNAL
P
OWER SUPPLY). NOTE: FOR USE WITH NON-COMMUNICATING SYSTEMS.
ST-A1194-57-00
FIGURE 49
HUMIDISTAT USED TO CONTROL DEHUMIDIFICATION IN COOLING ONLY (NO HUMIDIFIER)
NOTE: FOR USE WITH NON-COMMUNICATING THERMOSTATS.
ST-A1194-58-00
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