The Adapter Board used in Symbio 700 Voyager III units has no control logic on it. It is merely traces that go from Point A to Point B, C, etc. Its purpose is to make wire harness connections easier. The Adapter Board distributes power and IMC communications to various modules. It also provides tie-in points for compressor safeties, pass through for condenser fan contactors, and supplies power for compressor contactors and the VHR relay on MZVAV units.
Below (and attached) is the schematic for the Adapter Board. Listed below is the function of each connector used in Voyager III units.
J1 - Not used.
J2 - Output to the VHR relay on MZVAV units. 24 VAV power supplied from J8 connector on Adapter Board via a relay on the Symbio 700 (P8) through J17 on the Adapter board.
J3 - Not used.
J4 - IMC and 24 VAC power for the FOM/IOM. The 24 VAC is sourced from J15 on the Adapter Board.
J5 - Output to the compressor contactors and feedback from the compressor proving switches from J20 on Adapter Board via Symbio 700 P8, P9, and P10
J6 - Not used
J7 - 24 VAC output for Reheat Pumpout Solenoid on the SMC
J8 - 24 VAC supply input for CC3 coil, CCM, and RHP. from TNS2
J9 - Compressor 3 safeties.
J11 - Compressor 2 safeties
J13 - Compressor 1 safeties
J14 - Not used
J15 - 24 VAC supply input for IOM/FOM from TNS4,
J16 - Condenser Fan Request from Symbio 700
J17 - VHR request from Symbio 700 relay output on P6.
J18 - IMC Communications to the Symbio 700 and 24 VAC in from TNS1.
J19 - 24 VAC Power and IMC to the SMC from J8 on Adapter Board.
J20 - Compressor Request and Contactor Proving from/to Symbio 700 P8, P9, and P10
J21 - Not Used.
J22 - Output to Condenser Fan Contactors. Fed from J16 on Adapter Board via relays on Symbio 700 P7. 24 VAC fed from J25 on Adapter Board.
J23 - Not used.
J24 - 24 VAC output to Symbio 700 P7 for condenser fan control from J25 on Adapter Board.
J25 - 24 VAC input for CC1 and CC2 contactor coils and condenser fan contactor coils from TNS3.
J26 - Not used
J27 - Not used
See attachments for pictorial representations of various functions.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.