Odyssey A2L R-454B Simplified Pairing H Wiring

Overview

These instructions cover wiring the Odyssey air handler for electromechanical operation with a Symbio condenser.   

For pairing applications where control is provided by the thermostat, wiring between the air handler and
condenser is reduced to a single cable for both condenser cooling and heat pump applications. In these
applications, the thermostat provides control of the split system. The Symbio™ 700 accepts the Y1, Y2
(optional), O (heat pump only), and Limit/Shed (compressor disable) inputs from the thermostat/AHU.

Some features will be lost or limited when wiring the unit with Pairing H. 

Features lost or limited:

• Test mode on the condenser will not bring on the indoor fan.
• Equipment Shutdown Input will shut down only the condenser and will not turn off the supply fan, since the thermostat controls it.
• Without the Indoor Options Module, the Symbio 700 (heat pump only) cannot turn on electric heat in defrost mode. You can still energize electric heat using the Relay Board J5 terminals W1 and W2.
• Zone sensors will not be used

Condenser: Odyssey R-454B Condenser with Symbio 700 controls

Air Handler: Odyssey R-454B air handler with 15th digit = C or modified Odyssey R454B air handler with model number 15th digit = D

Air Handling Unit Modifications if the Symbio Air Handling Unit was selected as Single Zone VAV (Digit 15=D):

Note: If the Symbio air handling unit was selected for 2-speed operation (Digit 15=C), the necessary VFD wiring
and VFD programming steps were completed in the factory.

See the article below for the modification instructions:

Odyssey Symbio A2L R454B Air Handler Conversion from Digit 15 = D to Digit 15 = C 

How many wires do I need?

1- Up to 8 wires in between the air handler and condenser

1 - Up to 8 wires in between the air handler and thermostat

1- Optional Communication Wire for IMC Communication 

• Recommended Symbio Communication Wire Article: Symbio Communication Wire

Cooling Only Wiring Diagrams:

Heat Pump Wiring Diagrams:

Indoor Options Module Wiring Diagrams:

The Indoor Options Module can be added to enable the Symbio 700 to turn on electric heat in defrost mode for a heat pump.

Update the Symbio configuration when you add the Indoor Options Module. Change the Secondary Heat to Electric and add the applicable stages. 

See this article for assistance changing the configuration: Symbio™ 700 - How to configure or edit configurations using the Mobile Phone App