Trane Odyssey Series - Air Handler to Condenser Connections; Symbio 700 Configuration and Settings

SS-SVN016A-EN
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Air Handler to Condenser Connections
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Table 12. Pairing 1 or 2 air handler to condenser wiring
Cond. Required/
Optional
Air Handler
Connection
Condenser
Connection
Purpose
Instructions
1 Required LTB2-B2 (AB) J15-2 Ground It is recommended that the air handler and
condensing unit share low voltage power. If the
air handler and condensing unit have separate
low voltage power, these conductors can be
omitted, but isolation relays are needed on the
remaining control wire conductors.
2 Required LTB2-G (AB) J18-1 Low fan speed
3 Required LTB2-Y2 (UC) J21-6 High fan speed
4 Required LTB2-W1 (UC) J21-3 Electric Heat W1 and W2 are jumped together in the air
handler to activate high fan speed
5 Optional LTB2-Y2 (UC) J21-2 Single compressor High fan speed in cooling
6 Optional LTB2-R (AB) J15-1 24VAC for EDC Power to evaporator defrost (if installed)
7 Optional LTB2-B1 or
LTB2-CD
(UC) J16-2 EDC 2-Speed Fan: Move wire 37M to LTB2-R
If the EDC switch in the air handler will be
utilized for low evaporator compressor
protection, use the Symbio Service and
Installation Mobile Application to edit the
following:
• Go to Tools > Service > Customer
Connection Polarity and change Demand
Limit Input to Reversed.
• Edit Configuration and set Demand
Management to Demand Limit.
• Edit Settings > Refrigeration and set
Cooling Demand Limit Capacity Enable
Setpoint to 0%.
Symbio 700 Configuration and Settings
See “Symbio Service and Installation Mobile Application,” p. 31 for details on editing equipment
configuration. Review and edit the following:
• IInnddoooorr FFaann TTyyppee: When connecting the Symbio Condenser to an electromechanical air
handler with two-speed fan operation, ensure that the Symbio 700 UC indoor fan type
configuration is set to “Single Speed” selection. The air handler relay board will switch the
fan speeds based on thermostat call.
• PPrriimmaarryy HHeeaattiinngg SSoouurrccee: If the air handler has electric heat, configure the Symbio 700 UC
for primary heating source to “Not Installed”, otherwise a Diagnostic for Options Module
Comm Fail will be active. The Symbio 700 will still turn the indoor fan on with a W1 call.
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