Rheem 97MDV060 Series Installation Instructions Manual page 72

11. COMMUNICATING ECM MOTOR
COMMUNICATIONS (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,
condenser (or heat-pump) and thermostat. Further, a
different communications protocol is used.
12. DIPSWITCHES
Seven-Segment Display Orientation; SW1
As the control will be applied in a multi-position furnace, a
means of changing the orientation of the seven-segment
display is required. This dipswitch is to be labeled SW1.
Factory setting of the SW1 dipswitch is OFF. The factory
setting display orientation is with the control placed with
the low voltage terminal block T2 is on the left side.
Cool Blower-Off Delay; SW2 & SW3
A means of selecting the cooling speed blower "off" delay
time is provided. In legacy mode, dipswitches are required
to select the delay time. These dipswitches are labeled
SW2 and SW3. The following table defines the settings:
Selection SW2
A* OFF
B ON
C OFF
D ON
Note: Factory setting = 30 seconds
Cooling Airflow Selection; SW4 & SW5
SW4 and SW5 are used to select cooling airflow in legacy
mode. The value used for each selection is specified
below.
FIGURE 52
HUMIDISTAT USED TO CONTROL DEHUMIDIFICATION IN COOLING ONLY (NO HUMIDIFIER)
NOTE: FOR USE WITH NON-COMMUNICATING THERMOSTATS.
72
SW3 Selection
OFF 30 seconds
OFF 45 seconds
ON 60 seconds
ON 0 seconds
HUMIDISTAT
HUMIDISTAT (24V)
(CONTACTS OPEN
(24V)
WHEN HUMIDITY
(CONTACTS
IS ABOVE SET POINT)
OPEN
WHEN
HUMIDITY IS
ABOVE SET
POINT)
ST-A1194-81-00
ST-A1194-81
HIGH COOL SELECTIONS:
SW4 SW5
OFF* OFF
ON OFF
OFF ON
ON ON
LOW COOL SELECTIONS:
The following CFM's will be used for low-stage legacy
cooling unless dipswitch SW9 is in the ON position - in
which case the low cooling airflow becomes 50% of the
high cooling airflow.
SW4 SW5
OFF* OFF
ON OFF
OFF ON
ON ON
*Factory Setting
Airflow dipswitches are to be used to determine airflow
when a legacy (24 VAC) call is placed on the thermostat
inputs of the control. Communicated calls will have CFM
requirements as part of the call (when a legacy condenser
is attached to a communicating furnace the airflow de-
mand will be transmitted from the communicating thermo-
stat as the installer will configure the cooling airflow
requirements for the non-communicating condenser at the
thermostat and the airflow requirements for the condenser
will be stored, at and transmitted from, the thermostat).
1
2
R
C
HUM STAT
W1
W2
G
Y1
Y2
B
S1
S2
L1
SA1 SA2 OAT1 OAT2
HUM HUM EAC
S3
SWITCH #S2-8 MUST BE IN "ON" POSITION (NOTE: FACTORY
SWITCH #S2-8 MUST BE IN "ON POSITION
(NOTE: FACTORY POSITION IS "OFF").
POSITION IS "OFF"). TURNING THIS SWITCH "OFF" WILL DISABLE
TURNING THIS SWITCH "OFF" WILL DISABLE
DEHUMIDIFICATION OPERATION WITH A NON-COMMUNICATING
DEHUMIDIFICATION OPERATION WITH A
THERMOSTAT
NON-COMMUNICATING THERMOSTAT
½ HP Blower ¾ HP Blower
(56 & 70 KBTU) (84, 98 &112 KBTU)
1050 CFM 1750 CFM
875 CFM 1400 CFM
700 CFM 1225 CFM
525 CFM 1050 CFM
½ HP Blower ¾ HP Blower
(56 & 70 KBTU) (84, 98 &112 KBTU)
788 CFM 1313 CFM
656 CFM 1050 CFM
525 CFM 919 CFM
394 CFM 788 CFM