Bryant 524J 07 Installation, Start-Up And Service Instructions Manual

5 24 J 07 -1 6
P a ck a ge d A ir -Ha nd l in g Un i ts
wi th R -4 10 A Re fr ig er a nt
6 0 Hz
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Refrigerant Piping Access . . . . . . . . . . . . . . . . . . . . . . . . . 13
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
• DISCHARGE CONNECTIONS
• RETURN CONNECTIONS
• OUTDOOR-AIR INLET CONNECTIONS
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adjusting TXV for Superheat . . . . . . . . . . . . . . . . . . . . . . 24
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Individual Fan Wheel Adjustment . . . . . . . . . . . . . . . . . . 25
Fan Shaft Position Adjustment . . . . . . . . . . . . . . . . . . . . . 25
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . . . . . 26
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
START-UP CHECKLIST. . . . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install,
repair, or service air-conditioning equipment.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No.
Installation, Start-up and
Service Instructions
Page
Printed in U.S.A. Form II524J-7-16-02 Rev. A
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit, and other safety precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for
personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the safety-
alert symbol. DANGER identifies the most serious hazards
which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices,
which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or
operation.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury
or death.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lock(s)
and lockout tag(s). Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit rating
plate. Unit may have more than one power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service
equipment or components
equipment.
Pg 1
on R-410A refrigerant
1-22 Replaces: II524J-7-16-01