Bryant 549B Installation, Start-Up And Service Instructions Manual

IMPORTANT — READ BEFORE INSTALLING
1. Read and become familiar with these installation
instructions before installing this unit. (See Fig. 1.)
2. Be sure the installation conforms to all applicable
local and national codes.
3. These instructions contain important information for
the proper maintenance and repair of this equipment.
Retain these instructions for future use.
CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

I. Locate the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
II. Unit Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
III. Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IV. Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
V. Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
VI. Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-38
I. Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
II. Heating Section Start-Up and Adjustments . . . . . . . . . . 21
III. Cooling Section Start-Up and Adjustments . . . . . . . . . . . 22
IV. Indoor Airflow and Airflow Adjustments . . . . . . . . . . . . . . 24
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
I. Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-41
I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
II. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
III. Blower Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
IV. Outdoor Fan Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 39
V. Economizer Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
VI. Current Lockout Relay (CLO) . . . . . . . . . . . . . . . . . . . . . . . 40
VII. High-Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
VIII. Loss-of-Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
IX. Freeze-Stat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
X. Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
XI. Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-46
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Recognize safety information. This is the safety-alert symbol
( ). When you see this symbol on the unit and in instruc-
tions or manuals, be alert to the potential for personal injury.
Understand the signal words — DANGER, WARNING, and
CAUTION. These words are used with the safety-alert sym-
bol. Danger identifies the most serious hazards which will
result in severe personal injury or death. Warning indicates
a condition that could result in personal injury. Caution is
used to identify unsafe practices which would result in minor
personal injury or product and property damage.
installation, start-up and
service instructions
SINGLE PACKAGE ROOFTOP
HIGH-EFFICIENCY HEAT PUMP UNITS
Cancels: II 549B-36-1
Page
WARNING: Before performing service or mainte-
nance operations on unit, turn off main power switch
to unit. Electrical shock could cause personal injury.
1. The power supply (volts, hertz, and phase) must cor-
respond to that specified on unit rating plate.
2. The electrical supply provided by the utility must be
sufficient to handle load imposed by this unit.
3. Refer to Locate the Unit section on page 3 and Fig. 2
for locations of electrical inlets, condensate drain,
duct connections, and required clearances before set-
ting unit in place.
4. This installation must conform with local building
codes and with NEC (National Electrical Code) or
NFPA (National Fire Protection Association) 54 TIA-
54-84-1. Refer to Provincial and local plumbing or
wastewater codes and other applicable local codes.
5. Approved for outdoor installation on wood flooring or
on class A, B, or C roof covering materials.
Unit is shipped in the vertical airflow configuration (see
Fig. 1). To convert to horizontal discharge, remove horizontal
duct opening covers. Using the same screws, install covers on
duct openings in basepan of unit with the insulation side
down. Seals around duct openings must be tight.
All units can be connected into existing duct systems that are
properly sized and designed to handle an airflow of 300 to
500 cfm per each 12,000 Btuh of rated cooling capacity.
NOTE: When installing any accessory item, see the manufac-
turer's installation instructions packaged with the accessory.
A qualified installer or agency must use only factory-
authorized kits or accessories when modifying this unit.
DuraPac Plus Series
Sizes 036-072
3 to 6 Tons
II 549B-36-2
Fig. 1 — Typical Unit
INSTALLATION
549B
2/15/01