Trane Odyssey Series - Air Handler to Condenser Connections; Air Handler Changes

SS-SVN016A-EN
25
Air Handler to Condenser Connections
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Table 13. Pairing G (preferred) air handler to condenser writing
Cond. Required/
Optional
Air Handler
Connection
Condenser
Connection
Purpose
Instructions
1 Required LTB2-R (AB) J15-1 24VAC 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-B1 (AB) J15-2 Ground
3 Required LTB2-G (AB) J18-1 Low fan speed
4 Optional LTB2-W1 (UC) J21-3 Electric Heat
5 Optional LTB2-W2 (UC) J21-5 Electric Heat
6
Optional
LTB2-CD
(UC) J16-2
EDC
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%.
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Table 14. Pairing G twisted pair wiring
Cable Required/
Optional
Air Handler
Connection
Condenser
Connection
Purpose
Instructions
1 Required
(a)
(VFD) 68 (AB) J16-1 Modbus +
(VFD) 69 (AB) J16-2 Modbus -
No connect (AB) J15-3 Shield Connect shield only at condenser to ground
terminal. At air handler, tape shield back onto
cable.
(a)
Remove and isolate wires from VFD terminals 12, 18, 27, 53, and 55 and from fan run relay terminals 2 and 4.
Air Handler Changes
1. The following VFD re-programming (TR-150) is required:
• Reference 1 Source – [11] Local Bus Reference
• Terminal 18 Digital Input – [0] No Operation
• Terminal 27 Digital Input – [0] No Operation
• Control Site – [2] Control Word Only
• Control Source – [1] FC Port
• Control Timeout Time – 15.0 sec
• Control Timeout Function – [2] Stop
• Protocol – [2] Modbus RTU
• Address – 2
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