Bryant 551J Factory-Option Thru-Base Connections, Units without Thru-Base Connections, Thermostat

NOTICE

Convenience Outlet Utilization

Maximum Intermittent use : 15 Amps 2 to 3 Hours

Maximum Continuous use : 8 Amps 24/7

				50HJ542739	3.0
						A9225
		Fig. 20 - Convenience Outlet Utilization Notice Label
		Duty Cycle: the unit-powered convenience outlet has a duty
		cycle limitation. The transformer is intended to provide
		power on an intermittent basis for service tools, lamps, etc; it
		is not intended to provide 15-amps loading for continuous
		duty loads (such as electric heaters for overnight use).
		Observe a 50% limit on circuit loading above 8-amps.
551J	j	Convenience outlet usage rating:
		Continuous usage: 8 amps maximum
		Intermittent usage: up to 15 amps maximum for
			up to 2 hours maximum
		Test the GFCI receptacle by pressing the TEST button on
		the face of the receptacle to trip and open the receptacle.
		Check for proper grounding wires and power line phasing
		if the GFCI receptacle does not trip as required. Press the
		RESET button to clear the tripped condition.
		Factory-Option Thru-Base Connections —
		This service connection kit consists of a 1/2-in electrical
		bulkhead connector and a 3/4-in electrical bulkhead
		connector, all factory-installed in the embossed (raised)
		section of the unit basepan in the condenser section. The
		3/4-in bulkhead connector enables the low-voltage control
		wires to pass through the basepan. The 1/2-in electrical
		bulkhead connector allows the high-voltage power wires
		to pass through the basepan. See Fig. 21.

LOW VOLTAGE

CONDUIT

CONNECTOR

HIGH VOLTAGE

CONDUIT

CONNECTOR

C08637

Fig. 21 - Thru-Base Connection Fittings

Check tightness of connector lock nuts before connecting electrical conduits.

Field-supplied and field-installed liquid tight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage through appropriate conduits. Connect the power conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). A

hole must be field cut in the main control box bottom on the left side so the 24-v control connections can be made. Connect the control power conduit to the unit control box at this hole.

Units without Thru-Base Connections —

1.Install power wiring conduit through side panel open- ings. Install conduit between disconnect and control box.

2.Install power lines to terminal connections as shown in Fig. 15.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. See Table 4. On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 5, Note 2 to determine the percent of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Bryant warranty.

Field Control Wiring —

The 551J unit requires an external temperature control device. This device can be a thermostat emulation device provided as part of a third-party Building Management System.

Thermostat —

Install a Bryant-approved accessory thermostat according to installation instructions included with the accessory. For complete economizer function, select a two-stage cooling thermostat. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24-v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24-v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

Using unit-mounted convenience outlets: Units with unit-mounded convenience outlet circuits will often require that two disconnects be opened to de-energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de-energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.

For wire runs up to 50 ft. (15 m), use no. 18 AWG (American Wire Gage) insulated wire [35_C (95_F) minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated wire [35_C (95_F) minimum]. For over 75 ft. (23 m), use no. 14 AWG insulated wire [35_C (95_F) minimum]. All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

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