Bryant 502A - Manual

Cancels: II 502A-24-1 II 502A-36-1
12/15/05
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
I. Step 1 — Receive and Inspect Unit . . . . . . . . . . . . . 1
II. Step 2 — Protect Unit from Damage . . . . . . . . . . . . 1
III. Step 3 — Provide Unit Support. . . . . . . . . . . . . . . . . 1
IV. Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 4
V. Step 5 — Make Piping Connections. . . . . . . . . . . . . 4
VI. Step 6 — Install Ductwork. . . . . . . . . . . . . . . . . . . . . 4
VII. Step 7 — Make Electrical Connections . . . . . . . . . . 4
VIII. Splitting Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IX. Field Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . 5
X. Thermostat Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
XI. Step 8 — Fan Speed . . . . . . . . . . . . . . . . . . . . . . . . . 5
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions such as 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 and on tags and labels
attached to unit.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available.
NOTE: Ensure voltage on unit agrees with voltage listed on
the unit rating plate.
GENERAL
The 502A036,048, and 060 units are single-package, indoor,
horizontally mounted air conditioners of 3, 4 and 5 tons
capacity, respectively.
These units can be mounted as factory-shipped single-
package units or can be separated and mounted as a split
system. If unit is split, the condenser section can be mounted
horizontally.
All units are designed to be ducted on both the condenser
and evaporator sides. Centrifugal blowers are used to ensure
quiet air delivery to the conditioned space. Sound level
requirements should be determined before final unit instal-
lation site is chosen.
Unit servicing is relatively simple since access to the con-
denser and evaporator motors, blowers, belt, and pulley is
gained through removable swing doors located on bottom of
unit. These doors may also be used for cleaning of condenser
coils. Unit side panels provide access to control box and pres-
sure switches.
Refrigeration cycle components (e.g., compressor, filter
drier, etc.) can be serviced upon removal of the base unit
from the space.
INSTALLATION
The 502A units are intended for indoor installation only.
I. STEP 1 — RECEIVE AND INSPECT UNIT
Unpack and check unit against shipping order. Inspect care-
fully for concealed shipping damage. If unit is damaged or
incomplete, file claim with transportation company and
advise Bryant immediately.
II. STEP 2 — PROTECT UNIT FROM DAMAGE
To maintain warranty, unit must be protected against theft
and vandalism and stored indoors at all times.
III. STEP 3 — PROVIDE UNIT SUPPORT
Refer to Fig. 1 and 2 for unit dimensions and component
locations. Refer to Table 1 for unit sizes and weights.
Each unit requires the following field-supplied items:
4 — threaded suspension rods ( 3 /
8
-in.-16 SAE Grade 1
minimum)
4 — washers
4 — locknuts
Install the 4 field-supplied rods by suspending them from a
suitable ceiling support. Locate rods to mate with 4 outside
corner rigging holes shown in Fig. 1 and 3.
The ceiling and ceiling supports of existing buildings may
require reinforcements; follow all applicable codes.
WARNING: Before performing service or main-
tenance operations on unit, turn off main power switch
to unit. Electrical shock can cause personal injury.
WARNING: Determine building alterations required
to run piping, wiring, and ductwork. Follow dimensional
drawings carefully for ductwork, piping locations,
electrical wiring, and overall unit dimensions. Read all
installation instructions before starting installation.
installation, start-up and
service instructions
CEILING PAC ™ HORIZONTAL INDOOR
SINGLE PACKAGE COOLING UNITS
502A
Sizes 036-060
3 to 5 Tons