II. LUBRICATION

A. Compressors

Each compressor is charged with correct amount of oil at the factory.

B. Fan-Motor Bearings

Fan-motor bearings are of the permanently lubricated type. No further lubrication is required. No lubrication of condenser-fan or evaporator-fan motors is required.

III. EVAPORATOR FAN BELT INSPECTION

Check condition of evaporator belt or tension during heating and cooling inspections or as conditions require. Replace belt or adjust as necessary. Refer to Step 7 — Adjust Evaporator- Fan Speed on page 31 for proper adjustment procedures and belt tension.

IV. CONDENSER-FAN ADJUSTMENT (Fig. 40)

1.Shut off unit power supply, lockout and tag the disconnect.

2.Remove condenser-fan assembly (grille, motor, motor cover, and fan) and loosen fan hub setscrews.

3.Adjust fan height as shown in Fig. 40.

4.Tighten setscrews.

5.Replace condenser-fan assembly.

V. MANUAL OUTDOOR-AIR DAMPER

If outdoor-air damper blade adjustment is required, see Manual Outdoor-Air Damper section on page 22.

VI. ECONOMIZER ADJUSTMENT

Refer to Optional EconoMi$er IV section on page 23.

VII. REFRIGERANT CHARGE

A. Checking and Adjusting Refrigerant Charge

The refrigerant system is fully charged with R-22 refriger- ant, tested, and factory-sealed. Unit must operate in Cooling mode a minimum of 10 minutes before checking charge.

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R-22 charge.

A superheat charging chart is attached to the outside of the service access panel. The chart includes the required suction line temperature at given suction line pressures and outdoor ambient temperatures.

An accurate superheat, thermocouple-type or thermistor- type thermometer, and a gage manifold are required when using the superheat charging method for evaluating the unit charge. Do not use mercury or small dial-type thermometers because they are not adequate for this type of measurement.

CAUTION: When evaluating the refrigerant charge, an indicated adjustment to the specified fac- tory charge must always be very minimal. If a substan- tial adjustment is indicated, an abnormal condition exists somewhere in the cooling system, such as insuf- ficient airflow across either coil or both coils.

Proceed as follows:

1.Remove caps from low-pressure and high-pressure service fittings.

2.Using hoses with valve core depressors, attach low- pressure and high-pressure gage hoses to low- pressure and high-pressure service fittings, respectively.

3.Start unit in Cooling Mode and let unit run until sys- tem pressures stabilize.

4.Measure and record the following:

a.Outdoor ambient-air temperature (F db).

b.Evaporator inlet-air temperature (F wb).

c.Suction-tube temperature (F) at low-side service fitting.

d.Suction (low-side) pressure (psig).

5.Using “Cooling Charging Charts” compare outdoor- air temperature (F db) with the suction line pressure (psig) to determine desired system operating suction line temperature. See Fig. 41-48.

6.Compare actual suction-tube temperature with

desired suction-tube temperature. Using a tolerance of ± 3° F, add refrigerant if actual temperature is more than 3° F higher than proper suction-tube tem-

perature, or remove refrigerant if actual temperature is more than 3° F lower than required suction-tube temperature.

558F

FAN HEIGHT

‘‘A’’, in.

 

208/230 V

2.75

460 and 575 V

3.50

Fig. 40 — Condenser Fan Adjustment

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Bryant 558F II. Lubrication, III. Evaporator FAN Belt Inspection, Manual OUTDOOR-AIR Damper, VI. Economizer Adjustment
Page 56 Page 58

558F specifications

The Bryant 558F is a highly efficient and versatile gas furnace designed to provide reliable heating for residential spaces. Known for its exceptional performance and advanced technology, the 558F caters to homeowners looking for comfort, efficiency, and sustainability in their heating solutions.

One of the primary features of the Bryant 558F is its two-stage heating capability. This system allows the furnace to operate at different levels of output, optimizing energy consumption based on the heating demands of the home. By operating at a lower stage most of the time, the 558F can maintain consistent indoor temperatures while using less energy, leading to reduced utility bills.

The furnace is also equipped with aVariable Speed ECM blower motor. This feature provides enhanced air distribution and comfort by allowing for more precise control over airflow. The variable speed operation ensures that the furnace can adjust to the heating needs of the space without the constant on-off cycling, promoting quieter operation and better efficiency.

In terms of efficiency ratings, the Bryant 558F boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%. This high rating indicates that the furnace converts a significant portion of its fuel into usable heat, making it an environmentally friendly choice. With lower greenhouse gas emissions, homeowners not only benefit from cost savings but also contribute to reducing their carbon footprint.

Additionally, the furnace incorporates advanced combustion technology, including a durable heat exchanger designed for longevity and efficiency. This component is vital for maximizing heat transfer while minimizing heat loss, contributing to the overall performance of the unit.

The Bryant 558F is compatible with the manufacturer's Infinity System control, providing homeowners with a user-friendly interface to manage their heating system effectively. This compatibility allows for the integration of smart home technology, enabling remote access and programmable settings for added convenience.

Installation and maintenance of the Bryant 558F are straightforward, thanks to its compact design and thoughtful layout. Homeowners can find peace of mind knowing that service and upkeep are manageable, prolonging the life of the furnace.

In summary, the Bryant 558F gas furnace combines efficiency, advanced technology, and reliability to provide exceptional indoor comfort. With its two-stage heating, variable speed blower motor, and high AFUE rating, the 558F stands out as an optimal heating solution for modern homes seeking both performance and sustainability.
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