Bryant 576b installation instructions Control Voltage Connections, Power Wiring Connections

the current within 10%. Use the formula shown in Table 4, Note 2, to determine the percent voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such opera- tion would invalidate any applicable warranty.

4.Insulate low-voltage wires for highest voltage con- tained within conduit when low-voltage control wires are run in same conduit as high-voltage wires.

5.Do not damage internal components when drilling through any panel to mount electrical hardware, con- duit, etc.

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v terminal on the transformer and connecting it to the 200-v terminal on the transformer.

Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use factory- supplied splices or UL (Underwriters’ Laboratories) approved copper/aluminum connector.

When installing units, provide a disconnect per NEC. All field wiring must comply with NEC and local requirements.

Install field wiring as follows:

1.Install conduit through side panel openings.

2.Install power lines to terminal connections as shown in Fig. 5.

B.Control Voltage Connections

Install an accessory thermostat assembly according to instal- lation instructions included with the accessory. Locate ther- mostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals to low-voltage connections on unit (shown in Fig. 6) as described in Steps 1 through 4 below.

NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG

LEGEND

C— Contactor

NEC — National Electrical Code

Field Wiring

Factory Wiring

Splice Connection (Factory Supplied)

Fig. 5 — Power Wiring Connections

insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

1.Connect thermostat wires to screw terminals of low voltage connection board.

2.Pass the control wires through the hole provided in the corner post. See Fig. 7.

3.Feed wire through raceway built into the corner post and into the 24-v thermostat connection board. The 24-v thermostat connection is located on the left side of the low voltage connection compartment. The race- way provides the UL required clearance between the high- and low-voltage wiring.

4.Total combined amperage draw of the field-installed liquid line solenoid valve and indoor fan contactor must not exceed 22 va. If the specified va must be exceeded, use a remote relay to switch the load.

					LEGEND
AHA —		Adjustable Heat Anticipator	LLSV	—	Liquid Line Solenoid Valve	Terminal (Marked)
C	—	Contactor, Compressor	LPS	—	Low-Pressure Switch
						Spice
CB	—	Circuit Breaker	TB	—	Terminal Block
						Factory Wiring
CC	—	Cooling Compensator	TC	—	Thermostat-Cooling
						Field Control Wiring
CLO —		Compressor Lockout	TDR	—	Time-Delay Relay
						To Indicate Common Potential Only,
HPS —		High-Pressure Switch	TH	—	Thermostat-Heating
						Not To Represent Wiring
IFC	—	Indoor (Evaporator) Fan Contactor	TRAN —		Transformer
→		Fig. 6 — Typical Control Wiring Connections (569C Shown)
801					—6—