SS-SVN016A-EN
11
Air Handler to Condenser Connections
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Table 5. Pairing C or 3 air handler to condenser wiring
Cond. Required/
Optional
Air Handler
Connection
Condenser
Connection
Purpose
Instructions
1 Required (RB) J10-1 LTB1-R 24VAC If the air handler and condensing units have
separate low voltage power, these conductors
can be omitted, but isolation relays are
needed on the remaining Control Wire
conductors.
2 Required (RB) J10-2 LTB1-B1 Ground
3 Required (RB) J5-5 LTB1-Y1 Compressor 1
4 Optional (RB) J5-6 LTB1-Y2 Compressor 2
5 Optional (RB) J5-1 LTB1-B2 EDC This conductor is optional and is only needed if
compressor protection at low evaporator
temperatures is desired.
Evaporator Defrost Control
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1. If the EDC switch in the air handler will be utilized for low evaporator compressor protection,
the factory wire landed on relay board J8-1 must be cut and moved to terminal relay board
J10-2.
2. Move wire from terminal “H” to terminal “L” on EDC switch to enable normally closed switch
operation. This step is required.
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