Rheem RHPL-HM2421JC, Installation Instructions Manual

22

CONVENTIONAL THERMOST

A

T WIRING

The RHPL-series of air handlers are factory configured to for proper airflow. The cooling
airflow (CAF) is fixed and the DIP switch settings have no effect on airflow. The factory
setting is: 

IMPORTANT: The DIP switches are active only when using conventional a 24VAC ther-
mostat.  If using the Comfort Control

2

System™, refer to Section 5.13 for adjusting air-

flows.

*5.14 COOLING AIRFLOW ADJUSTMENTS WITH SINGLE STAGE
CONDENSING UNITS 

The  (-)HPL-  series  of  air  handlers  can  be  used  with  select  single-stage  condensing
units.  Refer  to  the  Engineering  Specifications  Sheets  to  determine  the  required  airflow
for your particular combination. Refer to Table 6 to determine the air-flows available for
each (-)HPL- air handler. Reference Figures 14-17 for proper wiring of the system. 

5.15 HEATING AIRFLOW ADJUSTMENT 

The RHPL-series of air handlers are factory configured to for proper airflow. The heat
pump airflow (PAF) is fixed and the DIP switch settings have no effect on airflow. The
factory setting is: 

IMPORTANT: The DIP switches are active only when using conventional a 24VAC ther-
mostat.  If  using  the  Comfort  Control

2

System™,  refer  to  Section  5.14  for  adjusting  air-

flows. 

TABLE 7

AIRFLOW SETTINGS WHEN USING TRADITIONAL 24VAC THERMOSTAT

FIGURE 19

DIP SWITCH SETTING FOR HEAT PUMP AIRFLOW

9

The (-)HPL-series of air handlers are factory configured to for proper airflow.  The cooling 

airflow (CAF) is fixed and the DIP switch settings have no effect on airflow.  The factory setting 

is: 

Cooling Airflow 

2-ton 3-ton 4-ton 5-ton 

Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 

CFM 

625 775 900 1200 1200 1625 1375 1675 

Table X.X – Airflow settings when using traditional 24VAC thermostat 

IMPORTANT:

  The DIP switches are active only when using conventional a 24VAC 

thermostat.  If using serial communications, refer to section 5 for adjusting airflows. 

6.5 Heating Airflow Adjustment 

Figure X – DIP switch setting for heat pump airflow 

The (-)HPL-series of air handlers are factory configured to for proper airflow.  The heat pump 

airflow (PAF) is fixed and the DIP switch settings have no effect on airflow.  The factory setting 

is:  

Heating Airflow 

2-ton 3-ton 4-ton 5-ton 

Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 

CFM 

625 775 900 1200 1200 1625 1375 1675 

Table X.X – Airflow settings when using traditional 24VAC thermostat 

IMPORTANT:

  The DIP switches are active only when using conventional a 24VAC 

thermostat.  If using serial communications, refer to section 5 for adjusting airflows. 

6.6 Airflow Adjustment (TRIM) 

TABLE 6

AIRFLOW SETTINGS WHEN USING TRADITIONAL 24VAC THERMOSTAT

RHPL-HM2421

RHPL-HM3621

RHPL-HM4824

RHPL-HM6024

CFM

Y1

625

775

900

1200

1200

1625

1375

1675

Y2

Y1

Y2

Y1

Y2

Y1

Y2

Cooling Airflow (also see Section 5.14)*

RHPL-HM2421

RHPL-HM3621

RHPL-HM4824

RHPL-HM6024

CFM

Y1

625

775

900

1200

1200

1625

1375

1675

Y2

Y1

Y2

Y1

Y2

Y1

Y2

Heating Airflow