Electrical Connections - Johnson Controls RJ H Series Installation Operation & Maintenance

RJ SERIES INSTALLATION MANUAL

Electrical Connections

General
Be sure the available power is the same voltage and phase as that shown on the unit serial plate. Line and low voltage wiring must be
done in accordance with local codes or the National Electric Code, whichever is applicable.
Unit Power Connection
Connect the incoming line voltage wires to L1 and L2 of the contactor as shown in Figure 13C for single-phase unit. Consult the Unit Elec-
trical Data in the Specification Catalog for correct fuse sizes.
Control Box
Accessory Relay
A set of "dry" contacts has been provided to control accessory devices, such as water solenoid valves on open loop installations, electronic
air cleaners, humidifiers, etc. This relay contact should be used only with 24 volt signals and not line voltage power. The relay has both
normally open and normally closed contacts and can operate with either the fan or the compressor. Use DIP switch SW2-3 to cycle the
relay with fan or compressor. The relay contacts are available on terminals #2 and #3 of P3.
208 Volt Operation
All RJ Series 208/230 units are factory wired for 230 volt operation. For 208 volt operation, the red and blue transformer wires must be
switched on terminal strip PS.
CAUTION: When installing a unit with an ECM blower motor in 460/60/3 voltage, a neutral wire is required to allow
proper unit operation.
Figure 13C: 208-230/60/1 control box
POWER WIRING
L1
L2
16