Bryant 558F installation instructions VII. Adjust EVAPORATOR-FAN Speed

Page 31

VII. STEP 7 — ADJUST EVAPORATOR-FAN SPEED

Adjust evaporator-fan speed to meet jobsite requirements.

Table 6 shows fan rpm at motor pulley settings, Table 7 shows motor efficiencies and Table 8 gives accessory static pressure drop. Table 9 shows motor performance. Refer to Tables 10-29 to determine fan speed settings. Fan motor pul- leys are factory set for speed shown in Tables 1A and 1B.

To change fan speed:

1.Shut off unit power supply and install lockout tag.

2.Loosen belt by loosening fan motor mounting plate nuts (see Fig. 34 and 35).

3.Loosen movable pulley flange setscrew (see Fig. 36).

4.Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease fan speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Tables 1A and 1B.

5.Set movable flange at nearest flat of pulley hub and tighten setscrew (see Tables 1A and 1B for speed change for each full turn of pulley flange).

To align fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting plate.

To adjust belt tension (see Fig. 34 and 35):

1.Loosen fan motor mounting plate nuts.

2.Units 090,091,102,103 — Slide motor mounting plate away from fan scroll for proper belt tension (1/2-in. deflection with 8 to 10 lb of force) and tighten mount- ing nuts (see Fig. 34).

MOTOR MOUNTING

PLATE NUTS

Fig. 34 — Typical Belt-Drive Motor

Mounting for Sizes 090,091,102,103

Units 120,121,150,151 — Slide motor mounting plate downward to tighten belt tension (1/2-in. deflection with 5 to 10 lb of force). Secure motor mounting plate nuts. See Fig. 35.

3.Adjust bolt and nut on mounting plate to secure motor in fixed position.

4.Check pulley alignment and realign pulleys if necessary.

Fig. 35 — Typical Belt-Drive Motor

Mounting for Sizes 120,121,150,151

Fig. 36 — Evaporator-Fan Pulley Adjustment

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Contents Safety Considerations ContentsII. Field Fabricate Ductwork IV. RIG and Place Unit III. Install External Trap for Condensate DrainPositioning Roof Curb Details ‘‘C’’ ‘‘A’’558F Base Unit Dimensions 558F090,102,120,150 Base Unit Dimensions 558F091,103,121,151 558F Unit Size Physical Data 558F090,102,120,150 UnitsAshrae 90.1-1999 Compliant Units Physical Data 558F091,103,121,151 UnitsField Control Wiring Field Power SupplyMake Electrical Connections Voltage Compressor OFM Electric Power Disconnect Nominal Type FLA Size 150 Voltage Compressor 103 151 Type FLA 17.0 17.1 31.4 136 34.0 34.1 52.7 51.0 51.2 60.8 150 44.9 234/234 017 10.4 21.7 25.0 006 49.1 277/277 017 10.4 21.7 25.0 006 61.0 364/364 017 10.4 21.7 25.0 012 Convenience Outlet Conduit InstallationDamper Panel with Manual Outdoor-Air Damper Installed EconoMi$er IV Component Locations Barometric Flow Capacity EconoMi$er IV Sensor Usage EconoMi$er IV Control ModesOutside Air Temperature Changeover Set Points Enthalpy Changeover Set Points Page CO2 Sensor Standard Settings Typical Belt-Drive Motor Mounting for Sizes 090,091,102,103 VII. Adjust EVAPORATOR-FAN SpeedAccessory/FIOP Static Pressure* in. wg Fan Rpm at Motor Pulley SettingsEvaporator-Fan Motor Efficiency General FAN Performance Notes Evaporator Fan Motor Data519 518 External Static Pressure in. wgRpm Bhp Watts 511 492550 629 624 832 511 492 591 680 660 885519 518 597 709 666 916 534 571 611 768 678 982550 629 624 832 690 1051 750 1285 805 1533 511 492 591 680 660 885 722 1106 779 1342519 518 597 709 666 916 727 1140 784 1378 534 571 611 768 678 982 739 1210 795 1453679 504 468 584 653 654 855646 663663 1162 726 1411 784 1672 837 1944 504 468 584 653 654 855 716 1074 774 1307630 985 696 1220 756 1469 811 1731 646 1071 711 1313 770 1568 824 1835570 712 638 869 532 559 604 702 668 846545 607 615 755 678 903 557 658 627 810570 712 638 869 699 1026 755 1184 806 1343 532 559 604 702 668 846 726 990 779 1136545 607 615 755 678 903 735 1052 788 1202 557 658 627 810 689 963 745 1117 797 12711162 4154 1134 37011144 3847 1153 3999753 1474 804 1666 852 1857 726 1299 779 1481 828 1662683 739 1385 792 1572 840 1758794 1767 739 1385 792 1572753 1474 804 1666 780 1665495 503 581 715 465 402 555 596471 421 560 618 483 461 571 665495 503 581 715 654 937 465 402 555 596 629 802471 421 560 618 634 828 483 461 571 665 644 881495 503 581 715 654 937 717 1171 775 1416 465 402 555 596 629 802 694 1021 753 1252471 421 560 618 634 828 699 1050 757 1283 483 461 571 665 644 881 708 1109 766 1348943 2241 459 384 550 575 625 778662 1361 675 1454689 1553 757 1877 818 2207 873 2543 924 2886 459 384 550 575 625 778 690 994 748 1221662 1361 732 1670 794 1985 851 2307 903 2635 675 1454 745 1771 806 2093 862 2422 913 2758516 647 590 776 655 911 484 506 562 625 630 752494 550 571 672 638 802 505 597 581 723 647 855516 647 590 776 655 911 714 1055 768 1207 484 506 562 625 630 752 691 888 747 1035494 550 571 672 638 802 699 941 754 1089 505 597 581 723 647 855 706 996 761 1146639 1402 701 1570 757 1741 809 1917 604 1155 669 1312 728 1473 782 1639616 1233 680 1395 738 1559 791 1728 627 1316 690 1481 747 1648 800 1821709 1322 761 1506 812 1695 628 997 685 1167 739 1343 791 1525 841 1712641 697 1243 750 1423 801 1608 850 1799747 1582 796 1777 628 997 685 1167 739 1343 791 1525697 1243 750 1423 801 1608 734 1492 784 1683START-UP Unit Preparation Internal WiringVI. Refrigerant Service Ports PRE-START-UPVIII. Cooling Safety ReliefXII. Operating Sequence Condensate Drain Service CleaningEvaporator Coil Condenser CoilManual OUTDOOR-AIR Damper VI. Economizer AdjustmentII. Lubrication III. Evaporator FAN Belt InspectionXI. Replacement Parts To Use Cooling Charging ChartsVIII. HIGH-PRESSURE Switch IX. LOSS-OF-CHARGE SwitchCooling Charging Chart 558F120 Cooling Charging Chart 558F091 II. ECONOMI$ER IV Troubleshooting Troubleshooting Unit TroubleshootingDifferential Enthalpy DCV Demand Controlled Ventilation and Power ExhaustEconoMi$er IV Troubleshooting Completion EconoMi$er IV PreparationTypical Unit Wiring Schematic Cooling Service Analysis Demand Control Enthalpy EconoMi$er IV Input/Output LogicTerminal† Index Call for Free Catalog Service TrainingCopyright 2005 Bryant Heating & Cooling Systems Catalog no Page III. START-UP Electrical START-UP ChecklistTemperatures Preliminary Information
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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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