Conventional 24Vac Thermostat Control Wiring Connections - Rheem ECONET RP2024BJVCA Installation Instructions Manual

4.9 Control Wiring (cont.)
IMPORTANT:
system requires continuous 18 AWG thermostat
wire. Do not use phone cord to connect indoor
and outdoor units. This will damage the
controls.
The EcoNet™ control system requires four (4)
control wires for unit operation:
• R 24 VAC
• C 24 VAC common
• Data wire E1 Communications
• Data wire E2 Communications
The EcoNet™ enabled air handler or furnace is
equipped with a 24-volt, 40 or 50 VA transformer
for proper system operation. See the wiring
diagram below for low voltage wiring connections.
EcoNet™
Control Center
E1 E2 R C
Indoor
Unit
BR/W
E1
PR
E2
R
R
BR
C
These wires need to be connected to each device
(Control Center, indoor air handler or furnace, and
outdoor unit).
Once all devices are connected, apply the line
voltage to the indoor and outdoor units.
When all devices are powered, the EcoNet™
Control Center should detect the indoor and
outdoor units within 45 seconds.
Once the system is powered and all components
are communicating with each other, the airflow
settings will be automatically configured in the air-
handler or furnace.
All adjustments for indoor airflow are made at the
EcoNet™ Control Center from this point. Items
that can be changed are airflow trim adjustment,
on-demand dehumidification, cooling and heating
airflow and electric heat airflow. The Control
Center also has a wide range of fault and history
information. To access any of the control center
menus press the settings, status, or service icons
at the bottom of the touch screen. Refer to the
air handler or furnace installation manual and
the EcoNet™ Control Center installation manual
for further details on setting up the system and
available adjustment options.
The EcoNet™ control
Outdoor
Unit
E1
E2
R
C
4.0 INSTALLATION
4.9.4 Conventional 24VAC
Thermostat Control Wiring
Connections
The (-)P20**B series of heat pumps allow the
installer to use conventional 24 VAC control wiring
and a conventional thermostat for limited unit
operation. The system will operate as a single
stage system at nominal capacity.
IMPORTANT:
of unit installation and operation is by the EcoNet™
Communicating System which allows access to
the fault history of the system. This diagnostic
information is not available at the thermostat when
the (-)P20 unit is using a conventional thermostat.
Thermostat control wiring requires a minimum of
five (5) wires for proper unit operation:
R – 24 VAC
C – 24 VAC common
Y1 – Nominal capacity operation
B – Heat pump operation
W – Supplemental Heat During Defrost Cycle
The following figures show the typical control
wiring diagrams with (-)P20 heat pumps using
a conventional 24VAC thermostat. Cooling and
heat pump airflow levels will need to be adjusted
for homeowner comfort once the system is
operational. Use DIP switches on the air-handler or
furnace control board.
WIRE COLOR CODE
BK – BLACK GY – GRAY
BR – BROWN O – ORANGE
BL – BLUE PR – PURPLE
G – GREEN R – RED
TYPICAL SINGLE-STAGE THERMOSTAT:
(-)P20 HEAT PUMP WITH AIR-HANDLER
USING A THERMOSTAT WITH DEHUMIDIFICATION
ST-A1286-02
The preferred method
W – WHITE
Y – YELLOW
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