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The (-)HPL-series air handler is shipped with "On Demand Dehumidification" (ODD) turned
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
The RHPL-series air handler is shipped with "On Demand Dehumidification" (ODD)
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
turned OFF. On Demand Dehumidification is used in conjunction with a traditional
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.
24VAC thermostat equipped with an on-board humidity sensor. Activate ODD by turn-
ODD is turned ON, the thermostat sends a 24VAC signal to the ODD input of the air handler.
The (-)HPL-series air handler is shipped with "On Demand Dehumidification" (ODD) turned
ing DIP switch 7 ON. ODD operation is controlled by the indoor humidity sensed at the
Operation is:
Operation is:
thermostat. Operation is:
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
Normal Humidity (humidity BELOW the thermostat set point):
Normal Humidity (humidity BELOW the thermostat set point):
Normal Humidity (humidity BELOW the thermostat set point):
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):
High Humidity (humidity ABOVE the thermostat set point):
High Humidity (humidity ABOVE the thermostat set point):
High Humidity (humidity ABOVE the thermostat set point):
High Humidity (humidity ABOVE the thermostat set point):
The (-)HPL air handler is programmed to provide maximum efficiency and optimum humidity
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
The RHPL air handler is programmed to provide maximum efficiency and optimum
removal. When high humidity is detected, the air handler reduces cooling airflow defined in
Table X.X.
humidity removal. When high humidity is detected, the air handler reduces cooling air-
Table X.X.
flow defined in Table 9.
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 9
Table X.X.
ODD AIRFLOW REDUCTION
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
IMPORTANT: The DIP switches are active only when using conventional a 24VAC
IMPORTANT: The DIP switches are active only when using conventional a 24VAC ther-
thermostat. If using serial communications, refer to section 5 for adjusting airflows.
mostat. If using the Comfort Control
(Refer to Section 5.9.)
N N O O T T E E : : ODD airflow adjustments are active for cooling operation only. They are
ignored when the heat pump is in heating mode or when electric heat is activated.
TABLE 10
SELECTION C EXPLANATION: ON DEMAND DEHUMIDIFICATION
SWITCH 7
ODD
POSITION
INPUT
NONE
ON
24VAC
5.19 COOLING DELAY PROFILES
Cooling delay profiles are not available when the RHPL air handler is controlled using a
conventional 24VAC thermostat. These profiles are available only when the air handler
is wired for the Comfort Control
Cooling Delay Profiles wiring.
5.20 AIR HANDLER DIAGNOSTIC CODES
Descriptions of the air handler Comfort Control
These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT: Air handler diagnostic codes are available at the thermostat when the
system is wired for Comfort Control
Figure X – On Demand Dehumidification DIP Switch
Figure X – On Demand Dehumidification DIP Switch
Figure X – On Demand Dehumidification DIP Switch
Normal Humidity
Normal Humidity
A 24VAC signal is applied to
A 24VAC signal is applied to
the ODD terminal
the ODD terminal
Normal Humidity
A 24VAC signal is applied to
the ODD terminal
High Humidity
High Humidity
No signal applied to the ODD
No signal applied to the ODD
terminal
terminal
High Humidity
No signal applied to the ODD
terminal
Air Handler
Air Handler
2-ton
2-ton
3-ton
3-ton
Air Handler
4-ton
4-ton
5-ton
5-ton
2-ton
Table X.X – ODD Airflow Reduction
3-ton
Table X.X – ODD Airflow Reduction
4-ton
5-ton
Table X.X – ODD Airflow Reduction
2
System™, refer to Section 5.17 for adjusting airflows.
COOLING AIRFLOW - CFM
RHPL-HM2421
RHPL-HM3621
Y1
Y1
Y2
500
625
725
625
775
900
1200
2
System™. Refer to Section 5.10 for Comfort Control
2
.
Result
Result
Full rated airflow is delivered
Full rated airflow is delivered
by the blower
by the blower
Result
Full rated airflow is delivered
by the blower
Result
Result
Airflow is reduced by a preset
Airflow is reduced by a preset
amount to increase latent
amount to increase latent
capacity
capacity
Result
Airflow is reduced by a preset
amount to increase latent
capacity
Cooling Airflow
Cooling Airflow
Reduction
Reduction
85%
85%
Cooling Airflow
80%
80%
Reduction
85%
80%
RHPL-HM4824
RHPL-HM6024
Y2
Y1
Y2
950
950
1300
1100
1200
1625
1375
2
diagnostic codes are provided below.
11
11
11
Y1
Y2
1350
1675
2
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