Bryant 574B Installation Instructions Manual Download Page 1

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Installation Instructions

574B

SINGLE--PACKAGED GAS FURNACE/AIR CONDITIONER

SYSTEM WITH PURON

REFRIGERANT

2--5 NOMINAL TONS (SIZES 024--060) 1 & 3 PHASE

NOTE

: Read the entire instruction manual before starting the

installation.

NOTE

: Installer: Make sure the Owner’s Manual and Service

Instructions are left with the unit after installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RECEIVING AND INSTALLATION

2--12

. . . . . . . . . . . . . . . .

Check Equipment

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identify Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspect Shipment

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Unit Support

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Roof Curb

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ground Mount

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Fabricate Ductwork

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Clearances

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rig and Place Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect Condensate Drain

. . . . . . . . . . . . . . . . . . . . . . . . . .

Install Flue Hood

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Gas Piping

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Duct Connections

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Units for Downflow (Vertical)

Discharge

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Electrical Connections

. . . . . . . . . . . . . . . . . . . . . . .

High--Voltage Connections

. . . . . . . . . . . . . . . . . . . . . . .

Special Procedures for 208--V Operation

. . . . . . . . . . . . .

Control Voltage Connections

. . . . . . . . . . . . . . . . . . . . . .

Easy Select

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heat Anticipator Setting

. . . . . . . . . . . . . . . . . . . . . . . . .

Transformer Protection

. . . . . . . . . . . . . . . . . . . . . . . . . .

PRE--START--UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP

15--22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check for Refrigerant Leaks

. . . . . . . . . . . . . . . . . . . . . . . .

Unit Sequence of Operation

. . . . . . . . . . . . . . . . . . . . . . . .

574B Sequence of Operation

. . . . . . . . . . . . . . . . . . . . . .

Start--Up Heating & Make Adjustments

. . . . . . . . . . . . . . .

Checking Heating Control

. . . . . . . . . . . . . . . . . . . . . . . .

Check Gas Input

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjust Gas Input

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Burner Flame

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Airflow and Temperature Rise

. . . . . . . . . . . . . . . . . . . . .

Limit Switches

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Auxiliary Limit Switch (Rollout)

. . . . . . . . . . . . . . . . . .

Start--Up Cooling & Make Adjustments

. . . . . . . . . . . . . . .

Checking Cooling Control Operation

. . . . . . . . . . . . . . .

Checking and Adjusting Refrigerant Charge

. . . . . . . . . .

Indoor Airflow and Airflow Adjustments

. . . . . . . . . . . .

MAINTENANCE

22--26

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Filter

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Evaporator Blower and Motor

. . . . . . . . . . . . . . . . . . . . . . .

Flue Gas Passageways

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Induced Draft (Combustion Air) Blower

. . . . . . . . . . . . . . .

C99088B

Fig. 1 -- Unit 574B

Limit Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Burner Ignition

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Burners

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Condenser Coil, Evaporator Coil, & Condensate

Drain Pan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Condenser Fan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Controls and Wiring

. . . . . . . . . . . . . . . . . . . . . .

Refrigerant Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Input

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Evaporator Airflow

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Puron

Items

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due

to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this

equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations

must be performed by trained service personnel. When working
on this equipment, observe precautions in the literature, on tags,

and on labels attached to or shipped with the unit and other safety

precautions that may apply.
Follow all safety codes. Installation must be in compliance with

local and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read

these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.

Summary of Contents for 574B

Page 1: ...y Limit Switch Rollout 19 Start Up Cooling Make Adjustments 19 Checking Cooling Control Operation 19 Checking and Adjusting Refrigerant Charge 22 Indoor Airflow and Airflow Adjustments 22 MAINTENANCE 22 26 Air Filter 23 Evaporator Blower and Motor 23 Flue Gas Passageways 23 Induced Draft Combustion Air Blower 23 C99088B Fig 1 Unit 574B Limit Switch 23 Burner Ignition 23 Main Burners 23 Condenser C...

Page 2: ...IPMENT Inspect for shipping damage while unit is still on shipping pallet If unit appears to be damaged or is torn loose from its anchorage have it examined by transportation inspectors before removal Forward claim papers directly to transportation company Manufacturer is not responsible for any damage incurred in transit Check all items against shipping list Immediately notify the nearest equipme...

Page 3: ...S in mm Between units power entry side 42 1066 8 Unit and ungrounded surfaces power entry side 36 914 Unit and block or concrete walls and other grounded surfaces control box side 42 1066 8 LEGEND CG Center of Gravity COND Condenser EVAP Evaporator NEC National Electrical Code REQ D Required Note Dimensions are in in mm C99017 UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN MM A CENTER ...

Page 4: ...and Ventilation of the National Fuel Gas Code ANSI American National Standards Institute Z223 1 or applicable provisions of local building code In Canada follow sections 7 2 7 3 or 7 4 or Can CGA Canadian Gas Association B149 Installation Codes or applicable provisions of local building code IMPORTANT Do not restrict outdoor airflow An air restriction at either the outdoor air inlet or the fan dis...

Page 5: ... A BTyp Supply opening B x C Long Support D 445 16 Return opening B X C Insulate d deck pan Short Support CTyp C00076 UNIT SIZE ODS CATALOG NUMBER A IN MM B IN MM C IN MM D IN MM 574B024 036 CPRFCURB006A00 8 203 11 279 16 1 2 419 28 3 4 730 CPRFCURB007A00 14 356 11 279 16 1 2 419 28 3 4 730 574B042 060 CPRFCURB008A00 8 203 16 3 16 411 17 3 8 441 40 1 4 1022 CPRFCURB009A00 14 356 16 3 16 411 17 3 8...

Page 6: ...41 156 Corner Weight 4 177 188 201 Fig 5 574B Corner Weights A 1226 3 48 28 914 1371 36 54 927 57 36 52 PLACE RIGGING STRAPS IN BASEPAN SLOT BELOW HANDHOLDS BEFORE RIGGING SEAL STRIP MUST BE IN PLACE BEFORE PLACING UNIT ON ROOF CURB DUCTS B C99015 UNIT 574B MAXIMUM SHIPPING WEIGHT A B lb kg in mm in mm 024 372 169 22 0 558 5 14 50 368 3 030 372 169 22 0 558 5 14 50 368 3 036 410 186 22 0 558 5 15 ...

Page 7: ...ution to prevent damage when moving the unit Unit must remain in an upright position during all rigging and moving operations The unit must be level for proper condensate drainage therefore the ground level pad or accessory roof curb must be level before setting the unit in place When a field fabricated support is used be sure that the support is level and properly supports the unit Lifting point ...

Page 8: ...nect a drain tube using a minimum of 3 4 in PVC or 3 4 in copper pipe all field supplied at the outlet end of the 2 in trap Do not undersize the tube Pitch the drain tube downward at a slope of at least 1 in for every 10 ft of horizontal run Be sure to check the drain tube for leaks 1 MIN 2 MIN TRAP OUTLET C99013 Fig 7 Condensate Trap Step 7 INSTALL FLUE HOOD The flue hood assembly is shipped in t...

Page 9: ...n 1 2 in follow recommendations of national codes 3 Apply joint compound pipe dope sparingly and only to male threads of joint when making pipe connections Use only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and or national codes Never use Teflon tape 4 Install sediment trap in riser leading to heating section See Fig 8 This drip leg functions as a tra...

Page 10: ...afety checks and power up unit NOTE The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of nonresidence type air conditioning and ventilating systems NFPA 90A or residence type NFPA 90B and or local codes and ordinances Adhere to the following criteria when selecting sizing and installing the duct system 1 Units are shipped for horiz...

Page 11: ...ate for maximum fuse circuit breaker size and minimum circuit amps ampacity for wire sizing The field supplied disconnect switch box may be mounted on the unit over the high voltage inlet hole when the standard power and low voltage entry points are used See Fig 2 and 3 for acceptable location See unit wiring label and Fig 11 for reference when making high voltage connections Proceed as follows to...

Page 12: ... AC HP SIZE SELECT SYSTEM SIZE INSTALLED Factory selected air conditioner size should correspond to capacity of unit installed Installer should verify air conditioner size to ensure that airflow delivered falls within proper range for the size unit installed This applies to all operational modes c SYSTEM TYPE SELECT SYSTEM TYPE INSTALLED Factory selected on 574B for AC Air conditioner For Gas Heat...

Page 13: ...on ACCESSORY INSTALLATION a AUXILIARY TERMINALS The AUX and HUM terminals on the Easy Select Board are tied directly to the G terminal and provide a 24 v signal whenever the G terminal is energized See Fig 12 During Super dehumidify mode the G signal is not present and the auxiliary terminals are not energized If the installation includes the use of this operating mode do not use these terminals t...

Page 14: ...ing tubing stubs when necessary Oil can ignite when exposed to torch flame WARNING Proceed as follows to inspect and prepare the unit for initial startup 1 Remove access panel 2 Read and follow instructions on all WARNING CAUTION and INFORMATION labels attached to or shipped with unit 3 Make the following inspections a Inspect for shipping and handling damages such as broken lines loose parts disc...

Page 15: ...rcuit R to W W1 The unit delivers the selected gas heat airflow The IGC will control a 45 sec blower On delay and a 45 sec Off delay Step 3 START UP HEATING AND MAKE ADJUSTMENTS UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed Complete the required procedures given in the Pre Start Up section before starting the unit Do not jumper any saf...

Page 16: ...just gas input 1 Remove cover screw over regulator adjustment screw on gas valve 2 Turn regulator adjustment screw clockwise to increase gas input or turn regulator adjustment screw counterclockwise to decrease input Manifold pressure must be between 3 4 and 3 6 in wc Unsafe operation of the unit may result if manifold pressure is outside this range Personal injury or unit damage may result FIRE A...

Page 17: ...17 A07012 Fig 18 208 230 1 60 Wiring Diagram Unit 574B 574B ...

Page 18: ...18 A07013 Fig 19 208 230 3 60 Wiring Diagram Unit 574B 574B ...

Page 19: ...ners and pilot The blower motor continues to run until LS resets When the air temperature at the limit switch drops to the low temperature setting of the limit switch the switch closes and completes the R control circuit The electric spark ignition system cycles and the unit returns to normal heating operation AUXILIARY LIMIT SWITCH ROLLOUT The function of the switch is to close the main gas valve...

Page 20: ...52 49 46 44 524 132 127 122 117 112 3612 56 53 50 47 45 534 134 129 124 119 114 3681 56 54 51 48 45 8 Add Charge if the measured temperature is higher than the table value 5 Interpolate if the Outdoor ambient temperature lies in between the table values Extrapolate if the temperature lies beyond the table range 2 Measure the Liquid line temperature by attaching a temperature sensing device to it 3...

Page 21: ...1610 Table 9 574B Gas Heating ECM Airflow Small Cabinet EASY SELECTt BOARD SETTING CFM 700 800 1100 1250 Unit Size External Static Pressure in wc 0 0 0 4 0 4 0 7 0 7 1 0 0 0 0 4 0 4 0 7 0 7 1 0 0 0 0 4 0 4 0 7 0 7 1 0 0 0 0 4 0 4 0 7 0 7 1 0 Gas Heat Size 024 040 855 770 710 060 1020 890 835 030 040 880 840 805 060 1030 970 910 036 060 1035 995 955 090 1170 1110 1025 Table 10 574B Gas Heating ECM ...

Page 22: ...usted properly ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before making any indoor wiring adjustments shut off gas supply Then disconnect electrical power to the unit WARNING Airflow can be changed by changing the selection pins on the Easy Select circuit board MAINTENANCE To ensure continuing high performance and to minimize the possibility of ...

Page 23: ...r Blower section 2 Remove the 3 screws holding the blower housing to the flue collector box cover See Fig 23 3 Remove the 12 screws holding the flue collector box cover See Fig 24 to the heat exchanger assembly Inspect the heat exchangers 4 Clean all surfaces as required using a wire brush COMBUSTION AIR BLOWER Clean periodically to assure proper airflow and heating efficiency Inspect blower wheel...

Page 24: ...and condensate drain line when inspecting the coils Clean the drain pan and condensate drain by removing all foreign matter from the pan Flush the pan and drain tube with clear water Do not splash water on the insulation motor wiring or air filter s If the drain tube is restricted clear it with a plumbers snake or similar probe device Ensure that the auxiliary drain port above the drain tube is al...

Page 25: ...y from the motor end 1 8 in of motor shaft will be visible See Fig 15 6 Ensure that setscrew engages the flat area on the motor shaft when tightening 7 Replace grille ELECTRICAL CONTROLS AND WIRING Inspect and check the electrical controls and wiring annually Be sure to turn off the gas supply and then the electrical power to the unit Remove access panel to locate all the electrical controls and w...

Page 26: ...f possible for most troubleshooting techniques Refrigerants present additional safety hazards FIRE EXPLOSION HAZARD Failure to follow this warning could result in personal injury death or property damage Wear safety glasses and gloves when handling refrigerants Keep torches and other ignition sources away from refrigerants and oils WARNING The scroll compressor pumps refrigerant throughout the sys...

Page 27: ...ate with Puron S Puron refrigerant cylinders are rose colored S Recovery cylinder service pressure rating must be 400 psig DOT 4BA400 or DOT BW400 S Puron systems should be charged with liquid refrigerant Use a commercial type metering device in the manifold hose when charging into suction line with compressor operating S Manifold sets should be 700 psig high side and 180 psig low side with 550 ps...

Page 28: ...etermine cause and correct Defective run start capacitor overload or start relay Determine cause and replace Defective thermostat Replace thermostat Faulty condenser fan 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 se...

Page 29: ...in three minutes after blower off delay timing in heat ing mode Ensure unit is fired on rate ensure temperature rise is correct Ensure unit s external static pressure is within application guide lines Limit switch faults LED 2 flashes High temperature limit switch is open Check the operation of the indoor evaporator fan motor Ensure that the supply air temperature rise is in accordance with the ra...

Page 30: ...MP SUPPLY AIR ___________ GAS HEAT SUPPLY AIR ___________ ELECTRIC HEAT SUPPLY AIR ___________ PRESSURES GAS INLET PRESSURE ___________IN WG GAS MANIFOLD PRESSURE ___________IN WG REFRIGERANT SUCTION ___________PSIG SUCTION LINE TEMP ___________ REFRIGERANT DISCHARGE ___________PSIG DISCHARGE TEMP ___________ VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GAS HEAT TEMPERATURE RISE TEMPERATURE RIS...

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