Rheem RHPL-HM4824JC - Electric Heat Airflow Settings

5.8 ELECTRIC HEAT AIRFLOW
The RHPL-series of air handlers are factory programmed to provide adequate airflow for
the maximum electric heat (auxiliary heat) allowed for a given model. Airflow adjustment
for lower KW heater applications is accessible via the Comfort Control
2
System thermo-
stat or via a service tool. Refer to their instructions to access the “Heating Airflow
Adjustment” menu.
5.9 COOLING MODE DEHUMIDIFICATION
The serial communicating control is shipped with “On Demand Dehumidification” (ODD)
turned OFF. On Demand Dehumidification may be activated from the serial communicating
thermostat when the serial communicating thermostat has an on-board humidity sensor.
IMPORTANT: On Demand Dehumidification is accessible via the serial communicating
thermostat or via a service tool. Refer to their instructions to access the ODD airflow
adjustment menu.
5.10 COOLING DELAY PROFILES
The RHPL air handler is factory configured with optimum ON/OFF delays to maximize
energy efficiency and comfort. In certain situations, the installer may choose an alternate
profile to tweak the system operation for the building load and to maximize comfort. The
alternate profiles are defined below:
IMPORTANT: On Demand Dehumidification, ODD, is the preferred method to maximize
comfort with little or no loss of energy efficiency. If using ODD, do NOT use any of the
alternate profiles. Only use the factory default profile. Use of the alternate profiles with
ODD will decrease energy efficiency with no gain in comfort.
Profile A – Factory default profile.
Profile B – Quiet Start profile
The Quiet Start profile is configured to bring the blower up to 50% airflow for 30 seconds
before advancing to 100% airflow. This helps to minimize the blower noise at system
startup.
Profile C – Humid profile
The humid profile is configured to run the blower at 80% airflow for about the first four
minutes of system operation to remove more moisture from the conditioned space.
18
Comfort Control
2
System™ CONTROL WIRING
On Delay
Air Handler
Delay Duration
(second)
% Rated Airflow Off Delay (seconds)
RHPL-HM2421 No Delay N/A 45
RHPL-HM3621 No Delay N/A 45
RHPL-HM4824 No Delay N/A 45
RHPL-HM6024 No Delay N/A 45
On Delay
Air Handler
Delay Duration
(second)
% Rated Airflow Off Delay (seconds)
RHPL-HM2421 30 50 15
RHPL-HM3621 30 50 15
RHPL-HM4824 30 50 15
RHPL-HM6024 30 50 15
On Delay
Air Handler
Delay Duration
(second)
% Rated Airflow Off Delay (seconds)
RHPL-HM2421 255 80 0
RHPL-HM3621 255 80 0
RHPL-HM4824 255 80 0
RHPL-HM6024 255 80 0
TABLE 4
ELECTRIC HEAT AIRFLOW FOR THE RHPL- AIR HANDLERS
TABLE 5
ODD TERMINAL
INDOOR INPUT TO “ODD”
AMBIENT TERMINAL
CONDITION (FROM HUMIDISTAT)
HIGH HUMIDITY Ø VAC
LOW HUMIDITY 24 VAC
Air Handler
Model
Above
15KW:
15KW and
below:
RHPL-HM2421JC 800 CFM 600 CFM
RHPL-HM3621JC 1200 CFM 600 CFM
RHPL-HM4824JC 1600 CFM 800 CFM
RHPL-HM6024JC 1800 CFM 800 CFM