Unit Operation With Two-Stage Cooling; Cooling Airflow Adjustments - Rheem RRPL-B Installation Instructions Manual

FIGURE 30

COOLING AIRFLOW ADJUSTMENTS

O
N
38
TABLE 8
LED FLASH CODES
Interface board
D. UNIT OPER TION WITH TWO-ST GE COOLING
The RRRL unit provides distinct airflows for two-stage cooling. (See Figure 28.) Unit opera-
tion is defined as:
• Y1 – First Stage Cooling
• Y2 – Second Stage Cooling
A 24VAC signal provides input for the cooling stages.
NOTE: A 24VAC input to the Y2 terminal overrides the input to the Y1 terminal. (Both must be
energized to enable 2nd stage cooling.)
E. COOLING IRFLOW DJUSTMENTS
3 4 3 4 3 4
O O
N N
A B C
SELECTION
A
B
C
D
Cooling airflow may be adjusted +10% or –10% from nominal airflow using switches 3 & 4.
Refer to Figure 33 for switch positions to achieve the desired adjustments in airflow.
NOTE: Continuous fan speed is NOT affected by switches 3 & 4.
IMPORTANT: The use of On Demand Dehumidification overrides the cooling airflow adjust-
ments when high humidity is detected by a dehumidifying thermostat or humidistat when con-
nected to the ODD terminal as shown in Figure 28. Refer to the Cooling Mode
Dehumidification section for more information.
DIP switch
settiings
• Flashes 12 times
1200 CFM
• Illuminate dimly 10 seconds, repeat sequence
• Flashes 6 times
600 CFM
• Illuminate dimly 10 seconds, repeat sequence
• Flashes 9 times, flash once for
950 CFM
• Illuminate dimly 10 seconds, repeat sequence
TABLE 9
TWO-STAGE OPERATION
Y1
INPUT
NONE
24 VAC
24 VAC
NONE
3 4
O
N
D
SWITCH 3
POSITION
OFF
ON
OFF
ON
LED Output
1
/ second
2
Y2 COOLING
INPUT OPERATION
NONE OFF
NONE 1 ST STAGE
24 VAC 2 ND STAGE
24 VAC OFF
SWITCH 4
POSITION ADJUSTMENT
OFF
OFF
ON
ON
COOLING
AIRFLOW
NONE
10%
-10%
NONE