Special Procedures For 208-V Operation; Control Voltage Connections; Heat Anticipator Setting; Transformer Protection - Bryant 582A Installation, Start-Up, And Operating Instructions Manual

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 complete the high-
voltage connections to the unit.
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
GND
CONTROL BOX
LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)
SPLICE BOX
Fig. 11—High- and Control-Voltage Connections
Single phase units:
1. Run the high-voltage (L1, L2) and ground leads into the
control box.
2. Connect ground lead to chassis ground connection.
3. Connect L1 to pressure lug connection 11 of the compressor
contactor.
4. Connect L2 to pressure lug connection 23 of the compressor
contactor.
Three-phase units:
1. Run the high-voltage (L1, L2, L3) and ground leads into the
control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black and yellow wires connected to the lines
side of the contactor.
4. Connect field L1 to black wire on connection 11 of the
compressor contactor.
5. Connect field wire L2 to yellow wire on connection 13 of
the compressor contactor.
6. Connect field wire L3 to Blue wire from compressor.
B. SPECIAL PROCEDURES FOR 208-V OPERATION
WARNING: Before making any wiring changes, make
sure the gas supply is switched off first. Then switch off
the power supply to the unit and install lockout tag.
Electrical shock can cause serious injury or death.
C. CONTROL VOLTAGE CONNECTIONS
Do not use any type of power-stealing thermostat. Unit control
problems may result.
Use no. 18 American Wire Gage (AWG) color-coded, insulated
(35 C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft from the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded, insulated (35 C
minimum) wires.
POWER
SUPPLY
FIELD-SUPPLIED
FUSED DISCONNECT
WHT(W1)
W
YEL(Y)
Y
THERMOSTAT
GRN(G)
(TYPICAL)
G
RED(R)
R
BRN(C)
C
C99018
STANDARD CONNECTION
Remove knockout hole located in the flue panel adjacent to the
control access panel (See Fig. 2 and 3). Remove the rubber
grommet from the installer's packet (included with unit) and install
grommet in the knockout opening. Provide a drip loop before
running wire through panel.
Run the low-voltage leads from the thermostat, through the inlet
hole, and into unit low-voltage splice box.
Locate five 18-gage wires leaving control box. These low-voltage
connection leads can be identified by the colors red, green, yellow,
brown, and white (See Fig. 11). Ensure the leads are long enough
to be routed into the low-voltage splice box (located below right
side of control box). Route leads through hole in bottom of control
box and make low-voltage connections (See Fig. 11). Secure all
cut wires, so that they do not interfere with operation of unit.
D. HEAT ANTICIPATOR SETTING
The room thermostat heat anticipator must be properly adjusted to
ensure proper heating performance. Set the heat anticipator, using
an ammeter between the W and R terminals to determine the exact
required setting.
NOTE: For thermostat selection purposes, use 0.18 amp for the
approximate required setting. Failure to make a proper heat
anticipator adjustment will result in improper operation, discom-
fort to the occupants of the conditioned space, and inefficient
energy utilization; however, the required setting may be changed
slightly to provide a greater degree of comfort for a particular
installation.
E. TRANSFORMER PROTECTION
The transformer is of the energy-limiting type. It is set to
withstand a 30-sec. overload or shorted secondary condition.
WARNING: Failure to observe the following warnings
could result in serious injury:
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.
3. Do not remove compressor terminal cover until all
electrical sources are disconnected.
4. Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box if
refrigerant leak is suspected around compressor termi-
nals.
5. Never attempt to repair soldered connection while
refrigerant system is under pressure.
6. Do not use torch to remove any component. System
contains oil and refrigerant under pressure. To remove
a component, wear protective goggles and proceed as
follows:
a. Shut off gas supply and then electrical power to unit.
b. Relieve and recover all refrigerant from system using
both high- and low-pressure ports.
c. Cut component connecting tubing with tubing cutter
and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
Proceed as follows to inspect and prepare the unit for initial
startup:
1. Remove access panel.
2. Read and follow instructions on all WARNING, CAU-
TION, and INFORMATION labels attached to, or shipped
with, unit.
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PRE-START-UP