Bryant 604D--A Special Procedures for 208-VOperation, Control Voltage Connections, 604D-- --A

604D-- -- A

Special Procedures for 208-V Operation

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing or servicing system, always turn off main power to system and install lockout tag. With disconnect switch open, move black wire from transformer (3/16 in.) terminal marked 230 to terminal marked 200. This retaps transformer to primary voltage of 208 vac.

Control Voltage Connections

NOTE: Do not use any type of power-stealing thermostat. Unit control problems may result.

Use no. 18 American Wire Gage (AWG) color-coded, insulated (35°C minimum) wires to make the control voltage connections between the thermostat and the unit. If the thermostat is located more than 100 ft (30.5 m) from the unit (as measured along the control voltage wires), use no. 16 AWG color-coded, insulated (35° C minimum) wires.

Standard Connections

Locate the eight (nine on 3-phase) low voltage thermostat leads in 24 volt splice box. See Fig. 9 for connection diagram. Run the low-voltage leads from the thermostat, through the control wiring inlet hole grommet (Fig. 2 and 3), and into the low-voltage splice box. Provide a drip loop before running wires through panel. Secure and strain relief all wires so that they do not interfere with operation of unit. A gray wire is standard on 3-phase units for connection to an economizer.

If an accessory electric heater is installed, low voltage leads from heater must be connected to factory supplied control leads from Indoor Fan Board P4 connector. Factory wires are provided for electric heat staging W1 and W2 (W2 and W3 on IFB). If room thermostat has only one stage of supplemental heat, connect white and violet wires shown in Fig. 9 to second stage heat field wire.

Some electric heaters have four control wires (plus common wire). Consult unit wiring diagram and electric heater wiring diagram for additional details.

Transformer Protection

The transformer is of the energy-limiting type. It is set to withstand a 30-second overload or shorted secondary condition. If an overload or short is present, correct overload condition and check for blower fuse on Interface Fan Board. Replace fuse as required with correct size and rating.

Accessory Electric Heaters Installation

Electric heaters may be installed with the 604D--A units per instructions supplied with electric heater package. See unit rating plate for factory-approved electric heater kits.

TRAP

OUTLET

1-in. (25 mm) min.

2-in. (51 mm) min.

A09052

Fig. 10 - Condensate Trap

10