Rheem 97MDV060 Series Installation Instructions Manual page 75

MODEL DATA CARD
When both Mode dipswitches are set to the "ON" position,
the furnace operates as normal to a modulating heat call
("W1" with PWM signal on "V/W2") with the firing rate ad-
justed by the PWM signal.
Continuous Fan Speed; SW12
One dipswitch (SW12) is to be provided for legacy contin-
uous fan adjustment.
Selections are as follows:
*SW12 = OFF = 500 CFM for ½ HP
700 for 3/4HP
SW12 = ON = 800 CFM for ½ HP
1200 for 3/4HP
Gas Heat Rise (Airflow) Adjustment; SW13, SW14,
SW15 & SW16
Four dipswitches are to be provided to adjust the low and
high heating temperature rise by changing the airflow. The
switches are to be labeled "HEAT ADJ" (SW13 & SW14),
"+/-" (SW15) and "2F/4F"(SW16). These switches will ad-
just the temperature rise by changing the airflow only
when SW13 and SW14 are NOT set to OFF/OFF. SW13
and SW14 will select the method of temperature rise ad-
justment as follows:
Selection SW13
A OFF
B ON
C OFF
D ON
SW15 ("+/-") is mapped as follows:
SW15 OFF = Positive Temperature Rise Adjustment
SW15 OFF = (Airflow is Reduced)*
SW15 ON = Negative Temperature Rise Adjustment
SW15 OFF = (Airflow is Increased)
SW16 ("2F/4F") is mapped as follows:
SW16 OFF = 2 Deg F Temperature Rise Adjustment*
SW16 ON = 4 Deg F Temperature Rise Adjustment.
Additionally, the adjustment to the low-end will affect a lin-
ear adjustment to the entire range of heating airflow ex-
cept at the 100% rate. The adjustment to the range will be
such that the 40% heating rate will be adjusted up or down
as specified by the dipswitch settings, the 100% heating
rate may also be adjusted up or down and all points in be-
tween will fall on a line created by the adjusted 40% heat-
ing airflow rate and the adjusted (or unadjusted) 100%
heating airflow rate.
Further, for communicating systems, the above selections
(made with dipswitches SW13, SW14, SW15, and SW16
in legacy mode) can be made via the Econet control cen-
ter.
INTEGRATED FURNACE CONTROL
SW14 Description
OFF No Adjustment*
OFF Adjust High Heat Only
ON Adjust Low Heat Only
ON Adjust BOTH Low
and High Heat
Together by the
same amount.
Heat Blower Off Delay; SW17
One dipswitch (SW17) is to be provided for heat blower off
delay selection.
SW17 = Off 90 second*
SW17 = On 120 second
Efficiency or Comfort Select; SW18
SW 18 will select between comfort heat (off –factory set-
ting) and efficiency heat (on).
SW18 = Off Comfort = Target Temp rise = +10°F
above mid Rise*
SW18 = On Efficiency = Target Temp rise = mid-rise
(as specified on rating label).
*Factory Setting
Bias/Termination; S4
For current installations, all three of the dipswitches in
bank S4 must be in the "OFF" position.
If not, the system may not be able to communicate.
13. MODEL DATA CARD CONNECTOR (P6)
There is a factory-installed model data card which is
plugged into the furnace control and wire-tied to the
furnace. At no time should this card be removed from the
furnace except during replacement of the card itself.
MODEL DATA CARD
A model data card is defined as an electronic card that
carries a copy of the furnace model data.The furnace
control receives model-specific data from the model data
card. Replacement model data cards with the appropriate
furnace model data for any given model can be ordered
from the Replacement Parts division. In the event that the
original model data card is lost, the original furnace control
has been replaced and there is no furnace model data, the
replacement model data card must be ordered and
installed into the connector at P6 to give the furnace valid
furnace model data. The furnace will not operate properly
without the correct furnace model data. When no furnace
model data is present either on the model data card or on
the furnace microprocessor a "d1 " (NO MODEL DATA)
fault code will be displayed at both the thermostat active
fault screen and at the furnace control (I.F.C.) seven-
segment displays.
If the original model data card is lost, it should be replaced
even if there is valid furnace model data on the IFC
microprocessor. The valid furnace model data on the IFC
microprocessor should only be considered as a backup to
the model data card.
14. DUAL SEVEN-SEGMENT DISPLAY AND FAULT
CODES (U38)
NOTE: Verify display orientation is correct before
interpreting fault codes. Otherwise the fault codes maybe
upside down.
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