Bryant 549B Series Installation, Start-Up And Service Instructions Manual Download Page 31

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Table 21 — Fan Performance 549B102 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

LEGEND

*Motor drive range: 860 to 1080 rpm. All other rpms require field-

supplied drive.

NOTES:
1. Boldface

indicates a field-supplied drive is required.

2. Maximum continuous bhp is 4.20.
3. See page 21 for general fan performance notes.

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.2

0.4

0.6

0.8

1.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

2500

462

0.37

348

541

0.50

467

614

0.64

594

681

0.78

728

744

0.93

868

2600

474

0.41

381

551

0.54

505

622

0.68

635

688

0.83

773

750

0.98

916

2700

486

0.45

417

561

0.58

545

630

0.73

679

695

0.88

820

756

1.04

967

2800

498

0.49

456

571

0.63

587

639

0.78

725

702

0.93

870

762

1.09

1020

2900

510

0.53

497

581

0.68

632

648

0.83

774

710

0.99

922

768

1.15

1076

3000

523

0.58

541

592

0.73

680

657

0.88

825

718

1.05

977

775

1.22

1135

3100

536

0.63

587

603

0.78

730

666

0.94

879

726

1.11

1035

783

1.28

1196

3200

549

0.68

637

614

0.84

783

676

1.00

936

735

1.17

1096

790

1.35

1260

3300

562

0.74

689

626

0.90

839

686

1.07

996

743

1.24

1159

798

1.42

1328

3400

575

0.80

744

637

0.96

898

696

1.14

1059

752

1.31

1226

806

1.50

1398

3500

588

0.86

802

649

1.03

961

707

1.21

1125

762

1.39

1296

815

1.58

1472

3600

601

0.93

864

661

1.10

1026

717

1.28

1194

771

1.47

1369

823

1.66

1548

3700

614

1.00

929

673

1.17

1095

728

1.36

1267

781

1.55

1445

832

1.75

1629

3800

628

1.07

997

685

1.25

1167

739

1.44

1343

791

1.64

1525

841

1.84

1712

3900

641

1.15

1069

697

1.33

1243

750

1.53

1423

801

1.72

1608

850

1.93

1799

4000

655

1.23

1144

709

1.42

1322

761

1.61

1506

812

1.82

1695

860

2.03

1890

4100

668

1.31

1223

722

1.51

1405

773

1.71

1593

822

1.92

1786

870

2.13

1984

4200

682

1.40

1305

734

1.60

1492

784

1.80

1683

833

2.02

1880

880

2.23

2082

4300

696

1.49

1392

747

1.70

1582

796

1.91

1777

844

2.12

1979

890

2.34

2184

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

1.2

1.4

1.6

1.8

2.0

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

2500

804

1.09

1013

861

1.25

1164

915

1.41

1319

967

1.59

1479

1017

1.76

1642

2600

809

1.14

1065

864

1.31

1219

918

1.48

1378

969

1.65

1541

1018

1.83

1708

2700

813

1.20

1119

869

1.37

1277

921

1.54

1439

972

1.72

1606

1021

1.90

1776

2800

819

1.26

1176

873

1.43

1337

925

1.61

1503

975

1.79

1673

1023

1.98

1847

2900

824

1.32

1235

878

1.50

1400

929

1.68

1569

978

1.87

1742

1026

2.06

1920

3000

830

1.39

1298

883

1.57

1466

934

1.76

1638

982

1.95

1815

1029

2.14

1996

3100

837

1.46

1363

889

1.65

1534

938

1.83

1710

986

2.03

1891

1033

2.23

2075

3200

843

1.53

1431

894

1.72

1606

944

1.91

1785

991

2.11

1969

1037

2.31

2157

3300

850

1.61

1502

901

1.80

1680

949

2.00

1863

996

2.20

2051

1041

2.40

2242

3400

858

1.69

1576

907

1.88

1758

955

2.09

1944

1001

2.29

2135

1046

2.50

2331

3500

865

1.77

1653

914

1.97

1838

961

2.18

2029

1007

2.38

2223

1051

2.60

2422

3600

873

1.86

1733

921

2.06

1922

967

2.27

2116

1012

2.48

2314

1056

2.70

2516

3700

881

1.95

1816

928

2.16

2010

974

2.37

2207

1019

2.58

2409

1062

2.80

2615

3800

889

2.04

1904

936

2.25

2100

981

2.47

2302

1025

2.69

2507

1068

2.91

2716

3900

898

2.14

1995

944

2.35

2195

988

2.57

2399

1032

2.80

2608

1074

3.03

2821

4000

907

2.24

2089

952

2.46

2293

996

2.68

2501

1038

2.91

2713

1080

3.14

2930

4100

916

2.35

2187

960

2.57

2395

1004

2.80

2607

1046

3.03

2822

1087

3.26

3042

4200

925

2.45

2289

969

2.68

2500

1011

2.91

2716

1053

3.15

2935

1094

3.39

3159

4300

934

2.57

2395

978

2.80

2610

1020

3.03

2828

1061

3.27

3052

1101

3.52

3279

Bhp

—

Brake Horsepower Input to Fan

Watts —

Input Watts to Motor

Summary of Contents for 549B Series

Page 1: ...riate accessory kit listed in Fig 1 available from your local distributor Attach the accessory thru the bottom ser vice connections to the basepan in accordance with the acces sory installation instructions Connections must be installed before the unit is set on the roof curb IMPORTANT The gasketing of the unit to the roof curb is critical for a watertight seal Install the gasket supplied with the...

Page 2: ...12 7 1 2 NPT 12 7 CRBTMPWR002A01 11 4 31 7 CRBTMPWR003A01 1 2 12 7 NPT 3 4 19 NPT 1 2 NPT 12 7 CRBTMPWR004A01 3 4 19 NPT 11 4 31 7 NOTES 1 Roof curb accessory is shipped disassembled 2 Insulated panels 1 in thick polyurethane foam 13 4 lb density 3 Dimensions in are in millimeters 4 Roof curb 16 gage steel 5 Attach ductwork to curb flanges of duct rest on curb 6 Service clearance 4 ft on each side...

Page 3: ...the transportation agency Keep the unit upright and do not drop it Spreader bars are not required if top crating is left on the unit Rollers may be used to move the unit across a roof Level by using the unit frame as a reference See Table 1 and Fig 4 for additional information Operating weight is shown in Table 1 and Fig 4 Lifting holes are provided in the base rails as shown in Fig 4 and 5 Refer ...

Page 4: ...Continuous Bhp Standard 2 90 2 90 3 70 High Static 4 20 4 20 5 25 Motor Frame Size Standard 56 56 56 High Static 56 56 56 Nominal Rpm Standard 1725 1725 1725 High Static 1725 1725 1725 Fan Rpm Range Standard 730 950 840 1085 860 1080 High Static 860 1080 860 1080 830 1130 Motor Bearing Type Ball Ball Ball Maximum Allowable Rpm 2100 2100 2100 Motor Pulley Pitch Diameter Min Max in Standard 3 4 4 4 ...

Page 5: ... 5 Fig 5 Base Unit Dimensions ...

Page 6: ...s from rated heater voltage heater kW will vary accordingly 2 To determine heater kW at voltages other than those shown in table use the following formula Heater kWnew Heater kW rated x unit power distribution voltage rated heater voltage 2 As an example For a 16 kW heater rated at 240 v with a power distribution voltage of 215 v kWnew 16 kW 215 240 2 kWnew 12 8 kW rating at 215 v WARNING Unit cab...

Page 7: ...03 414 425 439 441 457 460 3 60 414 508 10 0 62 0 0 7 4 8 16 5 27 8 33 0 41 7 50 0 19 8 33 4 39 7 50 2 60 1 28 7 53 5 70 5 78 3 91 5 88 8 30 60 80 80 100 100 30 53 69 76 88 99 170 189 203 209 220 230 UNIT 549B NOMINAL VOLTAGE V Ph Hz VOLTAGE RANGE COMPRESSOR each OFM each IFM ELECTRIC HEAT POWER SUPPLY MINIMUM UNIT DISCONNECT SIZE Min Max RLA LRA FLA FLA kW FLA MCA MOCP FLA LRA 090 208 230 3 60 18...

Page 8: ...99 427 437 448 462 464 480 460 3 60 414 508 10 0 62 0 0 7 7 4 16 5 27 8 33 0 41 7 50 0 19 8 33 4 39 7 50 2 60 1 31 3 56 1 73 1 80 9 94 1 96 4 35 60 80 90 100 100 33 56 72 79 91 102 181 201 215 221 231 241 UNIT 549B NOMINAL VOLTAGE V Ph Hz VOLTAGE RANGE COMPRESSOR each OFM each IFM ELECTRIC HEAT POWER SUPPLY MINIMUM UNIT DISCONNECT SIZE Min Max RLA LRA FLA FLA kW FLA MCA MOCP FLA LRA 090 208 230 3 ...

Page 9: ... following formula to determine the per cent of voltage imbalance Voltage Imbalance Example Supply voltage is 460 3 60 AB 452 v BC 464 v AC 455 v Determine maximum deviation from average voltage AB 457 452 5 v BC 464 457 7 v AC 457 455 2 v Maximum deviation is 7 v Determine percent of voltage imbalance Voltage Imbalance 100 x 1 53 This amount of phase imbalance is satisfactory as it is below the m...

Page 10: ...s For units with electric heat set heat anticipator settings as shown in Table 4 VI STEP 6 ADJUST FACTORY INSTALLED OPTIONS A Disconnect Switch The optional disconnect switch is non fused The switch can be locked in place for safety purposes The disconnect has a maximum rating of 80 amperes and cannot be used if rooftop electrical rating exceeds 80 amperes B Manual Outdoor Air Damper The outdoor a...

Page 11: ...ECT SWITCH OPTIONAL RACEWAY HOLE IN END PANEL COMPRESSOR NO 1 CONVENIENCE OUTLET LEGEND NOTE Underlined letter indicates active thermostat output when con figured for A C operation Fig 7 Low Voltage Connections With or Without Economizer or Two Position Damper Field Wiring Fig 8 Typical Field Control Wiring Raceway Fig 9 Defrost Board SCREWS SIDE MANUAL OUTDOOR AIR ADJUSTMENT SCREWS DAMPER BLADE F...

Page 12: ... IMPORTANT If the power exhaust accessory is to be installed on the unit the hood shipped with the unit will not be used and must be discarded Save the aluminum filter for use in the power exhaust hood assembly 3 The indoor coil access panel will be used as the top of the hood Remove the screws along the sides and bottom of the indoor coil access panel See Fig 17 4 Swing out indoor coil access pan...

Page 13: ... determine when the EconoMi er IV can be used for free cooling The sensor is factory installed on the EconoMi er IV in the outdoor air stream See Fig 14 The operating range of temperature measurement is 40 to 100 F Supply Air Temperature SAT Sensor The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan See Fig 24 This sensor is factory installed The operating ...

Page 14: ...e Minimum Pos Fully Closed DCV Max Middle DCV Set Middle Enthalpy C Setting NOTES 1 620 ohm 1 watt 5 resistor should be removed only when using differential enthalpy or dry bulb 2 If a separate field supplied 24 v transformer is used for the IAQ sensor power supply it cannot have the secondary of the transformer grounded 3 For field installed remote minimum position POT remove black wire jumper be...

Page 15: ...e of changeover control turn the enthalpy set point potentiom eter fully clockwise to the D setting See Fig 25 Outdoor Enthalpy Changeover For enthalpy control accessory enthalpy sensor part num ber HH57AC078 is required Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location See Fig 14 When the outdoor air enthalpy rises above the ...

Page 16: ...ntrol is not being used the min imum position potentiometer should be used to set the occu pied ventilation position The maximum demand ventilation position should be turned fully clockwise Adjust the minimum position potentiometer to allow the minimum amount of outdoor air as required by local codes to enter the building Make minimum position adjustments with at least 10 F temperature difference ...

Page 17: ...24 75 24 80 27 80 27 85 29 90 32 95 35 100 38 APPROXIMATE DRY BULB TEMPERATURE F C A A B B C C D D R E L A T I V E H U M I D I T Y HIGH LIMIT CURVE TR1 24 Vac COM TR 24 Vac HOT 1 2 3 4 5 EF EF1 _ P1 T1 P T N EXH 2V 10V EXH Set Set 2V 10V 2V 10V DCV DCV Free Cool B C A D SO SR SR SO AQ1 AQ DCV Min Pos Open Max N1 0 1000 2000 3000 4000 5000 6000 2 3 4 5 6 7 8 800 ppm 900 ppm 1000 ppm 1100 ppm RANGE ...

Page 18: ...output for minimum or base ventilation Base ventilation is the ventilation required to remove contaminants during unoccupied periods The following equation may be used to determine the percent of outside air entering the building for a given damper position For best results there should be at least a 10 degree difference in outside and return air temperatures TO Outdoor Air Temperature OA Percent ...

Page 19: ...loosening fan motor mounting nuts See Fig 31 and 32 3 Loosen the movable pulley flange setscrew see Fig 33 4 Screw the movable flange toward the fixed flange to increase speed and away from the fixed flange to decrease speed Increasing fan speed increases the load on the motor Do not exceed the maximum speed specified in Table 1 5 Set the movable flange at the nearest keyway of the pulley hub and ...

Page 20: ...e motor and electrical testing on these units ensures that the full horsepower range of the motors can be utilized with confidence Using fan motors up to the horsepower ratings shown in this table will not result in nuisance tripping or premature motor failure Unit warranty will not be affected UNIT 549B INDOOR FAN MOTOR UNIT VOLTAGE MAXIMUM ACCEPTABLE CONTINUOUS BHP MAXIMUM ACCEPTABLE OPERATING W...

Page 21: ...fected For additional informa tion on motor performance refer to Fan Motor Performance Table 8 2 Values include losses for filters unit casing and wet coils See Tables 10 and 11 for FIOP accessory static pressure information 3 Use of a field supplied motor may affect wire sizing Contact your Bryant representative to verify 4 Interpolation is permissible Do not extrapolate UNIT 549B MOTOR PULLEY TU...

Page 22: ...2 15 2004 3100 646 1 15 1071 711 1 41 1313 770 1 68 1568 824 1 97 1835 875 2 27 2114 3200 663 1 25 1162 726 1 51 1411 784 1 79 1672 837 2 09 1944 888 2 39 2229 3300 679 1 35 1259 741 1 62 1514 798 1 91 1781 851 2 21 2060 900 2 52 2351 3400 696 1 46 1361 756 1 74 1623 812 2 03 1896 864 2 34 2181 913 2 66 2478 3500 713 1 58 1469 772 1 86 1737 827 2 16 2017 878 2 48 2308 926 2 80 2610 3600 729 1 70 1...

Page 23: ...72 1 86 1737 827 2 16 2017 878 2 48 2308 926 2 80 2610 3600 729 1 70 1583 787 1 99 1857 841 2 30 2144 892 2 62 2441 939 2 95 2749 3700 746 1 83 1703 803 2 13 1985 856 2 44 2277 906 2 77 2580 953 3 10 2894 3750 755 1 89 1766 811 2 20 2051 864 2 52 2346 913 2 84 2653 959 3 18 2969 AIRFLOW CFM EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts R...

Page 24: ... 4000 697 1 37 1281 753 1 58 1474 804 1 79 1666 852 1 99 1857 897 2 20 2048 4100 712 1 47 1370 766 1 68 1567 817 1 89 1764 864 2 10 1960 909 2 31 2155 4200 726 1 57 1462 780 1 79 1665 830 2 00 1866 876 2 22 2067 920 2 43 2268 4300 741 1 67 1559 794 1 89 1767 843 2 12 1973 889 2 34 2179 932 2 56 2384 AIRFLOW CFM EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp ...

Page 25: ...1567 817 1 89 1764 864 2 10 1960 909 2 31 2155 4200 726 1 57 1462 780 1 79 1665 830 2 00 1866 876 2 22 2067 920 2 43 2268 4300 741 1 67 1559 794 1 89 1767 843 2 12 1973 889 2 34 2179 932 2 56 2384 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 2500 791 1 06 988 837 1 19 1112 881 1 33 1236 922 1 46 1362 962 1 60 1...

Page 26: ...2099 882 2 49 2320 926 2 72 2541 968 2 96 2760 4700 800 2 14 1991 849 2 38 2219 895 2 62 2445 939 2 86 2670 980 3 10 2895 4800 815 2 26 2111 863 2 51 2344 909 2 76 2575 952 3 01 2805 993 3 25 3034 4900 829 2 40 2235 877 2 65 2473 922 2 91 2709 965 3 16 2944 1005 3 41 3178 5000 844 2 54 2365 891 2 80 2608 936 3 06 2849 978 3 31 3089 1018 3 57 3328 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 ...

Page 27: ...09 2 76 2575 952 3 01 2805 993 3 25 3034 4900 829 2 40 2235 877 2 65 2473 922 2 91 2709 965 3 16 2944 1005 3 41 3178 5000 844 2 54 2365 891 2 80 2608 936 3 06 2849 978 3 31 3089 1018 3 57 3328 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 3000 836 1 42 1322 881 1 57 1467 923 1 73 1613 963 1 89 1761 1001 2 05 190...

Page 28: ...888 660 1 23 1151 727 1 53 1422 787 1 82 1702 841 2 13 1991 3300 596 1 03 957 672 1 32 1228 738 1 61 1506 797 1 92 1792 851 2 24 2088 3400 609 1 10 1030 684 1 40 1308 749 1 71 1593 808 2 02 1887 861 2 35 2188 3500 622 1 19 1106 696 1 49 1392 760 1 81 1685 818 2 13 1985 872 2 46 2294 3600 635 1 27 1187 708 1 59 1481 771 1 91 1781 829 2 24 2088 882 2 58 2403 3700 649 1 36 1272 720 1 69 1573 783 2 02...

Page 29: ...872 2 46 2294 3600 635 1 27 1187 708 1 59 1481 771 1 91 1781 829 2 24 2088 882 2 58 2403 3700 649 1 36 1272 720 1 69 1573 783 2 02 1881 840 2 35 2195 892 2 70 2517 3750 655 1 41 1316 726 1 74 1621 789 2 07 1932 845 2 41 2250 897 2 76 2575 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 2250 806 1 60 1494 856 1 87 ...

Page 30: ... 709 1 42 1322 761 1 61 1506 812 1 82 1695 860 2 03 1890 4100 668 1 31 1223 722 1 51 1405 773 1 71 1593 822 1 92 1786 870 2 13 1984 4200 682 1 40 1305 734 1 60 1492 784 1 80 1683 833 2 02 1880 880 2 23 2082 4300 696 1 49 1392 747 1 70 1582 796 1 91 1777 844 2 12 1979 890 2 34 2184 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts...

Page 31: ...5 773 1 71 1593 822 1 92 1786 870 2 13 1984 4200 682 1 40 1305 734 1 60 1492 784 1 80 1683 833 2 02 1880 880 2 23 2082 4300 696 1 49 1392 747 1 70 1582 796 1 91 1777 844 2 12 1979 890 2 34 2184 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 2500 804 1 09 1013 861 1 25 1164 915 1 41 1319 967 1 59 1479 1017 1 76 16...

Page 32: ...00 751 1 91 1778 798 2 13 1984 844 2 35 2195 889 2 59 2412 932 2 82 2633 4800 765 2 02 1885 812 2 25 2095 856 2 48 2310 900 2 71 2531 942 2 95 2756 4900 779 2 14 1996 825 2 37 2210 869 2 61 2430 912 2 85 2654 953 3 09 2883 5000 793 2 26 2112 838 2 50 2330 881 2 74 2554 923 2 98 2782 965 3 23 3014 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Wat...

Page 33: ...5 856 2 48 2310 900 2 71 2531 942 2 95 2756 4900 779 2 14 1996 825 2 37 2210 869 2 61 2430 912 2 85 2654 953 3 09 2883 5000 793 2 26 2112 838 2 50 2330 881 2 74 2554 923 2 98 2782 965 3 23 3014 AIRFLOW Cfm EXTERNAL STATIC PRESSURE in wg 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 3000 830 1 39 1298 883 1 57 1466 934 1 76 1638 982 1 95 1815 1029 2 14 19...

Page 34: ... is located on the hot gas tube coming out of the compressor The second is located on the suction tube going into the compressor Large black plas tic caps with O rings inside identify these valves No field access to these valves is available at this time Ensure that the plastic caps remain on the valves and are tight or the possibility of refrigerant leakage could occur VII COMPRESSOR ROTATION It ...

Page 35: ...ed W2 will be energized with 24 v and the heater contactor s HC will be energized which will energize the electric heater s When the space thermostat is satisfied W2 will be deener gized first and the electric heater s will be deenergized Upon a further rise in space temperature W1 will be deenergized and the reversing valve solenoids RVS1 and RVS2 will be energized C Cooling Units With EconoMi er...

Page 36: ...g mounting screws Refer to Accessory Economizer or Two Position Damper Installation Instructions for more details 3 Slide filters out of unit 4 Clean the coil using a commercial coil cleaner or dish washer detergent in a pressurized spray canister Wash both sides of the coil and flush with clean water For best results backflush toward the return air section to remove foreign material 5 Flush the c...

Page 37: ...y Refer to Table 1 VII LOSS OF CHARGE SWITCH Located on the outdoor liquid line is a low pressure switch which functions as a loss of charge switch This switch con tains a Schrader core depressor This switch opens at 7 psig and closes at 22 psig No adjustment is necessary Refer to Table 1 VIII FREEZESTAT Located on the hair pin end of the indoor coil is a bimetal temperature sensing switch This sw...

Page 38: ...djust the refrigerant charge while the unit is operating in the Heating mode If the charge amount is believed to be incorrect recover refrigerant and weigh in the amount listed on the unit rating plate X TYPICAL WIRING Refer to Fig 41 for a typical unit wiring diagram XI REPLACEMENT PARTS A complete list of replacement parts may be obtained from any Bryant distributor Fig 38 Cooling Charging Chart...

Page 39: ... Gage C Contactor Compressor CAP Capacitor CB Circuit Breaker CLO Compressor Lockout COMP Compressor Motor DFT Defrost Thermostat EQUIP Equipment FPT Freeze Up Protection Thermostat FU Fuse GND Ground HC Heat Contactor HPS High Pressure Switch HR Heater Relay IFC Indoor Fan Contactor IFM Indoor Fan Motor IFMOVL Indoor Fan Motor Overload Switch LPS Low Pressure Switch Terminal Block Terminal Econ 2...

Page 40: ...ne cause and replace Defective thermostat Replace thermostat Faulty outdoor fan cooling or indoor fan heating motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Compressor Operates Continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Low refrigerant charge Locate lea...

Page 41: ...Ensure terminals AQ and AQ1 are open The LED for both DCV and Exhaust should be off The actuator should be fully closed 3 Connect a 9 v battery to AQ positive node and AQ1 negative node The LED for both DCV and Exhaust should turn on The actuator should drive to between 90 and 95 open 4 Turn the Exhaust potentiometer CW until the Exhaust LED turns off The LED should turn off when the potentiometer...

Page 42: ...ulation is based on the greater of DCV and supply air sensor signals between minimum position and either maximum position DCV or fully open supply air signal Modulation is based on the greater of DCV and supply air sensor signals between closed and either maximum position DCV or fully open supply air signal INPUTS OUTPUTS Demand Control Ventilation DCV Enthalpy Y1 Y2 Compressor N Terminal Outdoor ...

Page 43: ...Indoor air quality sensor 16 Indoor coil 4 Cleaning 36 Indoor fan motor Lubrication 37 Motor data 20 Performance 22 33 Pulley adjustment 20 Pulley setting 4 21 Speed 4 Low pressure switch 4 37 Manual outdoor air damper 10 12 Mounting Compressor 34 Unit 3 4 Non fused disconnect switch 10 Operating sequence Cooling 35 Defrost 36 EconoMi er IV 35 Heating 35 Outdoor air hood 12 13 Outdoor air temperat...

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Page 45: ......

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Page 48: ... EDGES CHECK THAT RETURN INDOOR AIR FILTERS ARE CLEAN AND IN PLACE VERIFY THAT UNIT INSTALLATION IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND SETSCREW TIGHTNESS CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS VERIFY CORRECT ROTATION OF SCROLL COMPRESSORS VERIFY INSTALLATION OF ECONOMI ER IV HOOD IF EQUIPPED III START UP ELECTRICAL TEMPERATURES PR...

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