Rheem RHPL-HM2421JC - Airflow Adjustment (Trim); Electric Heat Airflow

5.16 AIRFLOW ADJUSTMENT (TRIM)
Cooling and heat pump airflow can be adjusted +/-10% to suit the installation. To adjust
the airflow, set DIP switches 5 & 6 per Table 8:
IMPORTANT: The DIP switches are active only when using conventional a 24VAC ther-
mostat. If using the Comfort Control
2
System™, refer to Section 5.15 for adjusting air-
flows.
NOTE: Airflow adjustment is active for cooling and heat pump operation only. They are
ignored when electric heat is activated.
5.17 ELECTRIC HEAT AIRFLOW
The RHPL-series of air handlers are shipped with the “Low KW airflow” feature turned
OFF. Activate lower airflow feature for lower KW electric heater applications by turning DIP
switch 8 ON.
IMPORTANT: The DIP switches are active only when using a conventional 24VAC ther-
mostat. If using the Comfort Control
2
System™, refer to section 5.8 for low KW heat air-
flow adjustment.
5.18 COOLING MODE DEHUMIDIFICATION
TABLE 8
AIRFLOW ADJUSTMENT SELECTION TABLE
23
ELECTRIC HEAT AIRFLOW FOR THE RHPN AIR HANDLERS
FIGURE 20
DIP SWITCH SETTING FOR AIRFLOW ADJUSTMENTS
10
Figure X – DIP switch setting for airflow adjustments
Cooling and heat pump airflow can be adjusted +/-10% to suit the installation. To adjust the
airflow, set DIP switches 5 & 6 per Table X.X:
Airflow Adjustments DIP Switch Settings
2-ton 3-ton 4-ton 5-ton
Position Switch
5
Switch
6
Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2
A OFF OFF 625 775 900 1200 1200 1625 1375 1675
B ON OFF 700 850 1000 1325 1325 1800 1525 1850
C OFF ON 575 700 800 1075 1075 1475 1250 1500
D ON ON 625 775 900 1200 1200 1625 1375 1675
Table X.X – Airflow Adjustment Selection Table.
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
NOTE: Airflow adjustment is active for cooling and heat pump operation only. They are
ignored when electric heat is activated.
6.7 Electric Heat Airflow
The (-)HPL-series of air handlers are factory programmed to provide adequate airflow for
electric heat (auxiliary heat). Airflow for electric heat is fixed and cannot be field adjusted.
Electric Heat Airflow Thermostat
Input
2-ton 3-ton 4-ton 5-ton
W1 or W2 800 CFM 1200 CFM 1600 CFM 1800 CFM
6.8 Cooling Mode Dehumidification
CONVENTIONAL THERMOSTAT WIRING
RHPL-HM2421JC 800 CFM 600 CFM
RHPL-HM3621JC 1200 CFM 600 CFM
RHPL-HM4824JC 1600 CFM 800 CFM
RHPL-HM6024JC 1800 CFM 800 CFM
Air Handler
Model
Above
15KW:
15KW and
below:
RHPL-HM2421
RHPL-HM3621
RHPL-HM4824
RHPL-HM6024
Position Switch
5
Switch
6
Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2
A OFF OFF 625 775 900 1200 1200 1625 1375 1675
B ON OFF 700 850 1000 1325 1325 1800 1525 1850
C OFF ON 575 700 800 1075 1075 1475 1250 1500
D ON ON 625 775 900 1200 1200 1625 1375 1675
DIP Switch Settings
Airflow Adjustments
10
Figure X – DIP switch setting for airflow adjustments
Cooling and heat pump airflow can be adjusted +/-10% to suit the installation. To adjust the
airflow, set DIP switches 5 & 6 per Table X.X:
Airflow Adjustments DIP Switch Settings
2-ton 3-ton 4-ton 5-ton
Position Switch
5
Switch
6
Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2
A OFF OFF 625 775 900 1200 1200 1625 1375 1675
B ON OFF 700 850 1000 1325 1325 1800 1525 1850
C OFF ON 575 700 800 1075 1075 1475 1250 1500
D ON ON 625 775 900 1200 1200 1625 1375 1675
Table X.X – Airflow Adjustment Selection Table.
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
NOTE: Airflow adjustment is active for cooling and heat pump operation only. They are
ignored when electric heat is activated.
6.7 Electric Heat Airflow
The (-)HPL-series of air handlers are factory programmed to provide adequate airflow for
electric heat (auxiliary heat). Airflow for electric heat is fixed and cannot be field adjusted.
Electric Heat Airflow Thermostat
Input
2-ton 3-ton 4-ton 5-ton
W1 or W2 800 CFM 1200 CFM 1600 CFM 1800 CFM
6.8 Cooling Mode Dehumidification
10
Figure X – DIP switch setting for airflow adjustments
Cooling and heat pump airflow can be adjusted +/-10% to suit the installation. To adjust the
airflow, set DIP switches 5 & 6 per Table X.X:
Airflow Adjustments DIP Switch Settings
2-ton 3-ton 4-ton 5-ton
Position Switch
5
Switch
6
Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2
A OFF OFF 625 775 900 1200 1200 1625 1375 1675
B ON OFF 700 850 1000 1325 1325 1800 1525 1850
C OFF ON 575 700 800 1075 1075 1475 1250 1500
D ON ON 625 775 900 1200 1200 1625 1375 1675
Table X.X – Airflow Adjustment Selection Table.
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
NOTE: Airflow adjustment is active for cooling and heat pump operation only. They are
ignored when electric heat is activated.
6.7 Electric Heat Airflow
The (-)HPL-series of air handlers are factory programmed to provide adequate airflow for
electric heat (auxiliary heat). Airflow for electric heat is fixed and cannot be field adjusted.
Electric Heat Airflow Thermostat
Input
2-ton 3-ton 4-ton 5-ton
W1 or W2 800 CFM 1200 CFM 1600 CFM 1800 CFM
6.8 Cooling Mode Dehumidification
88
FIGURE 21
ON DEMAND DEHUMIDIFICATION DIP SWITCH
11
Figure X – On Demand Dehumidification DIP Switch
The (-)HPL-series air handler is shipped with “On Demand Dehumidification” (ODD) turned
OFF. On Demand Dehumidification is used in conjunction with a traditional 24VAC thermostat
equipped with an on-board humidity sensor. Activate ODD by turning DIP switch 7 ON. When
ODD is turned ON, the thermostat sends a 24VAC signal to the ODD input of the air handler.
Operation is:
Normal Humidity (humidity BELOW the thermostat set point):
Normal Humidity Result
A 24VAC signal is applied to
the ODD terminal
Full rated airflow is delivered
by the blower
High Humidity (humidity ABOVE the thermostat set point):
High Humidity Result
No signal applied to the ODD
terminal
Airflow is reduced by a preset
amount to increase latent
capacity
The (-)HPL air handler is programmed to provide maximum efficiency and optimum humidity
removal. When high humidity is detected, the air handler reduces cooling airflow defined in
Table X.X.
Air Handler Cooling Airflow
Reduction
2-ton 85%
3-ton
4-ton
5-ton
80%
Table X.X – ODD Airflow Reduction
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
thermostat. If using serial communications, refer to section 5 for adjusting airflows.