V. STEP 5 — MAKE ELECTRICAL CONNECTIONS

WARNING: Unit cabinet must have an uninter- rupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code) ANSI (American National Standards Institute) / NFPA (National Fire Protection Association) 70-latest year and local electrical codes. Failure to follow this warning could result in the installer being liable for personal injury of others.

A. Field Power Supply

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

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.

551B090-120, 208/230-3-60

551B090-150, 460-3-60

When installing units, provide a disconnect per the NEC.

All field wiring must comply with the NEC and local require- ments. In Canada, electrical connections must be made in accordance with CSA (Canadian Standards Association) C22.1 Canadian Electrical Code Part One.

Install field wiring as follows:

1.Install conduit through side panel openings. For units without electric heat, install conduit between discon- nect and control box.

2.Install power lines to terminal connections as shown in Fig. 8.

3.For units with electric heat, refer to Accessory Instal- lation Instructions.

During operation, voltage to compressor terminals must be within range indicated on unit nameplate (see Table 2). On 3-phase units, voltages between phases must be balanced within 2%, and the current within 10%. Use the formula shown in Table 2, Note 2 on page 10 to determine the per- centage 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.

See Table 3 for electric heater and single point box usage.

551B150, 208/230-3-60

LEGEND

C— Contactor

COMP(S) — Compressor

IFC

— Indoor (Evaporator) Fan Contactor

NEC

—

National Electrical Code

OFC

— Outdoor (Condenser) Fan Contactor

TB

—

Terminal Block

Terminal Block Connection

Field Wiring Factory Wiring Splice Connection (Factory-Supplied)

551B090-150, 575-3-60

Fig. 8 — Power Wiring Connections

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Bryant 551B installation instructions Make Electrical Connections, Field Power Supply, Ifc, Nec, Ofc
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551B specifications

The Bryant 551B and 551C are two highly efficient air conditioning units designed to provide optimal comfort in residential settings. Known for their reliability and performance, these models are part of Bryant's esteemed line of heating and cooling solutions.

One of the standout features of the Bryant 551B is its two-stage cooling system, which allows for better humidity control and increased comfort. This ensures that homeowners can enjoy consistent temperatures while reducing energy consumption. The unit operates quietly, thanks to its noise-reducing technology, making it an ideal choice for bedrooms and living spaces.

On the other hand, the Bryant 551C builds upon this foundation with its variable-speed compressor. This technology allows the unit to adjust its cooling output according to the specific needs of the home. This results in seamless operation and even greater energy efficiency. Both models also incorporate Bryant's advanced control capabilities, which allow users to monitor and adjust settings remotely via smart devices, adding a layer of convenience and modernity to home climate control.

With an emphasis on durability, both the 551B and 551C feature a galvanized steel cabinet that protects against weather-related damage. The powder coat finish further enhances their resistance to rust and corrosion, ensuring a long lifespan and minimal maintenance.

Another significant characteristic of these units is their excellent Seasonal Energy Efficiency Ratio (SEER) ratings. The 551B boasts a SEER rating of up to 16, while the 551C takes it even further with ratings exceeding 20. This efficiency not only translates to lower energy bills for homeowners but also contributes to a reduced carbon footprint, making these units environmentally friendly options.

Both models are also designed to operate with eco-friendly refrigerants, aligning with modern energy standards and regulations aimed at reducing greenhouse gas emissions.

In summary, the Bryant 551B and 551C are exemplary choices for homeowners looking for reliable, efficient, and high-performing air conditioning solutions. With features such as two-stage and variable-speed compressors, advanced smart technology, and robust construction, these models stand out in the competitive HVAC market. They promise a comfortable indoor environment along with significant energy savings, making them a wise investment for the future.
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