Bryant 574B Installation Instructions

1
Installation Instructions
574B
SINGLE--PACKAGED GAS FURNACE/AIR CONDITIONER
SYS TEM WITH P URO NE REFRIGERANT
2--5 NOMINAL TONS (S IZES 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 1........................
INTRODUCTION 2..................................
RECEIVING AND INSTALLATION 2--12................
Check Equipment 2.................................
Identify Unit 2...................................
Inspect Shipment 2................................
Provide Unit Support 2..............................
Roof Curb 2.....................................
Slab Mount 2....................................
Ground Mount 2.................................
Field Fabricate Ductwork 2...........................
Provide Clearances 4................................
Rig and Place Unit 4................................
Connect Condensate Drain 7..........................
Install Flue Hood 8..................................
Install Gas Piping 9.................................
Install Duct Connections 9............................
Configuring Units for Downflow (Vertical)
Discharge 9.....................................
Install Electrical Connections 11.......................
High--Voltage Connections 11.......................
Special Procedures for 208--V Operation 11.............
Control Voltage Connections 12......................
Easy Selectt 12..................................
Heat Anticipator Setting 14.........................
Transformer Protection 14..........................
PRE--START--UP 14..................................
START--UP 15--22....................................
Check for Refrigerant Leaks 15........................
Unit Sequence of Operation 15........................
574B Sequence of Operation 15......................
Start--Up Heating & Make Adjustments 15...............
Checking Heating Control 15........................
Check Gas Input 15...............................
Adjust Gas Input 16...............................
Check Burner Flame 16............................
Airflow and Temperature Rise 19.....................
Limit Switches 19................................
Auxiliary 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 Coil, Evaporator Coil, & Condensate
Drain Pan 24......................................
Condenser Fan 24..................................
Electrical Controls and Wiring 25......................
Refrigerant Circuit 25................................
Gas Input 26.......................................
Evaporator Airflow 26...............................
PuronR Items 26...................................
TROUBLESHOOTING 27.............................
START--UP CHECKLIST 27...........................
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.

Bryant 574B Specifications

General

Brand	Bryant
Model	574B
Category	Gas Heater
Language	English