Sw3-1 And Sw3-2 - Rheem RGPE series Installation Instructions Manual

In non-communicating systems, the
heating cycle is always initiated by a 24
volt signal on W1. When the controller
senses 24 volts on W1, the following
sequence occurs:
TWO-STAGE FUNCTION SW1-3 = OFF:
After the blower on-delay period, the fur-
nace will respond to the thermostat
demand by adjusting the gas valve
pressure and blower heating speeds to
the "W" signal values. "W1" only = low
gas valve pressure and blower heating
speed. "W2" = high gas valve pressure
and blower heating speed.
SINGLE-STAGE FUNCTION ("W" sig-
nal only) :
(Single-stage function only applies when
switch SW1 is on and a single-stage
thermostat is installed as shown in
Figure 48.)
After the blower on-delay period, the fur-
nace will respond to the thermostat
demand by altering the gas valve pres-
sure and blower speed as follows:
P P h h a a s s e e 1 1 : : 0 to 7 minutes = Low of fur-
nace capacity (gas valve output and
blower speed)
P P h h a a s s e e 2 2 : : After 7 minutes = 100% of fur-
nace capacity (gas valve output and
blower speed)
FIGURE 37
HEAT RISE ADJUST – DIPSWITCHES SW3-1 AND SW3-2
Published
Model Low Temp
Rise Range
(-)GPE-05(-)BMKR 20°-50°F
(-)GPE-07(-)AMKR 20°-50°F
(-)GPE-07(-)BRQR 20°-50°F
(-)GPE-10(-)BRMR 25°-55°F
(-)GPE-12(-)ARMR 30°-60°F
(-)GLE-07(-)AMKR 20°-50°F
(-)GLE-07(-)BRQR 20°-50°F
(-)GLE-10(-)BRMR 25°-55°F
(-)GLE-12(-)ARMR 30°-60°F
N N O O T T E E : : If the call for heat ends during
any phase, the furnace will terminate
immediately at the firing rate of that
phase.
S S W W 2 2 - - 4 4 - For most cooling operation,
leave dip switch SW2-4 in the "OFF"
position. This will enable the furnace
operation with most two-stage, non-
communicating cooling equipment.
Actual SEER values will vary and
depend on the equipment combination.
Consult the specifications sheets and
installation instructions of the cooling
equipment purchased for a listing of the
SEER ratings for a specific combina-
tion.
Placing SW2-4 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).

SW3-1 and SW3-2

HEATING AIRFLOW ADJUSTMENTS
The furnace is shipped from the factory
with low and high fire heating airflows.
These are set from the factory to let the
furnace operate at the mid-point of the
temperature rise range. The tempera-
ture may vary slightly due to furnace
input and voltage variations.
Low Fire
Low 1st Hi
Mid-Rise
Adjustment Adjustment
B- SW3-1,2 = A- SW3-1,2 = C- SW3-1,2 =
ON/OFF OFF/OFF OFF/ON
Approx. Approx. Approx.
Temp Rise Temp Rise Temp Rise
27°F 35°F 43°F
27°F 35°F 43°F
27°F 35°F 43°F
32°F 40°F 48°F
37°F 45°F 53°F
30°F 35°F 45°F
27°F 35°F 43°F
32°F 40°F 48°F
37°F 45°F 53°F
2nd Hi Low
Published
Adjustment Adjustment
D- SW3-1,2 = High Temp B- SW3-1,2 =
ON/ON Rise Range ON/OFF
Approx. Approx.
Temp Rise Temp Rise
45°F 25°-55°F 32°F
50°F 37°F
30°-60°F
50°F 25°-55°F 32°F
55°F 30°-60°F 37°F
60°F 42°F
35°-65°F
50°F 30°-60°F 37°F
50°F 25°-55°F 32°F
55°F 30°-60°F 37°F
60°F 35°-65°F 42°F
The airflow can be slightly adjusted
to the homeowner's taste. This is
done with dipswitches SW3-1 and
SW3-2 of the furnace control board.
There is one adjustment below nom-
inal (heat rise is less than nominal –
air is warmer). Some models do not
have all three adjustments. Figure
37 shows the approximate heat rise
based on the adjustments of dip-
switch SW3-1 and SW3-2.
WARNING
IT IS THE INSTALLER'S RESPON-
SIBILITY TO VERIFY THAT THE
TEMPERATURE RISE DOES NOT
EXCEED THE PUBLISHED RISE
RANGE OF THE FURNACE. THE
RISE RANGE MUST ALWAYS BE
CHECKED AT BOTH LOW AND
HIGH FIRE BEFORE LEAVING
THE JOBSITE. IF THE TEMPERA-
TURE IS OUTSIDE THE SPECI-
FIED RANGE, AN ADJUSTMENT
TO THESE DIPSWITCHES MUST
BE MADE TO CORRECT THE
HEAT RISE.
High Fire
1st Hi
Mid-Rise
Adjustment Adjustment
A- SW3-1,2 = C- SW3-1,2 = D- SW3-1,2 =
OFF/OFF OFF/ON ON/ON
Approx. Approx. Approx.
Temp Rise Temp Rise Temp Rise
40°F 48°F
45°F 53°F
40°F 48°F
45°F 53°F
50°F 58°F
45°F 53°F
40°F 48°F
45°F 53°F
50°F 58°F
2nd Hi
55°F
56°F
55°F
60°F
65°F
60°F
55°F
60°F
58°F
47