Rheem RGFG Installation Instructions Manual page 56

FIGURE 43
DIPSWITCH BANK S1 HEAT AIRFLOW ADJUSTMENT
S5
S5-1 = ODD "ON" or "OFF" select. This
switch will ignore the input from the 24
volt terminal labeled "HUM STAT" during
cooling when in the "OFF" position.
However, the "HUM STAT" input is
always read in the heating mode to turn
on and off the humidifier relay.
When in the "ON" position, the dehumidi-
fication feature will become active and it
will be necessary to install a humidistat to
the "HUM STAT" terminal as discussed
and shown in wiring diagrams in the sec-
tion of this manual titled "HUMIDIFICA-
TION AND DEHUMIDIFICATION" of this
document. Failure to install a humidistat
to the "HUM STAT" terminal with dip-
switch SW2-1 in the "ON" position will
cause the cooling speed airflow to be
reduced to the dehumidification speed.
S5-2 - For most cooling operation, leave
dip switch SW2-4 in the "OFF" position.
This will enable the furnace operation
with most two-stage, non-communicat-
ing cooling equipment. Actual SEER
values will vary and depend on the
equipment combina tion. Consult the
specifications sheets and installation
instructions of the cooling equipment
purchased for a listing of the SEER rat-
ings for a specific combination.
56
Placing S5-2 in the "ON" position will
establish the low (Y1) cooling airflow at
½ of the max cool (Y2) airflow. This
setting will be useful with cooling sys-
tems where two compressors are used
to control two cooling stages (one com-
pressor for first stage and two com-
pressors for second stage).
S1
Dipswitch bank S1 is used to fine-tune
the airflow in the heating mode. The
switches of bank S1 can be set to
adjust either the minimum heat rate air-
flow or the maximum heat rate airflow
or both. Also, every firing rate in
between these points will be adjusted
accordingly.
S1 will allow for airflow adjustments at
high altitude, improper temperature
probe locations, or no temperature
probe applications. If the temperature
rise range needs adjustment, the tech-
nician must use separate temperature
probes to determine the rise range and
adjust the airflow using S1's dip switch-
es until the rise range is as close as
possible to the target temperature rise
(65°F or 55°F – adjusted at dipswitch
SW1-3).
NOTE: All dip switches on S1 will be
shipped in the "OFF" position.
See Figure 43 for Heating
Adjustment Selections.