Pre-Start-Up; Start-Up; Installation - Bryant 580G Installation, Start-Up And Service Instructions Manual

Fig. 32 — Low Ambient Kit Sensor Location

PRE-START-UP

WARNING: Failure to observe the following warn-
ings could result in serious personal injury:
1. Follow recognized safety practices and wear pro-
tective goggles when checking or servicing refrig-
erant 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 have been disconnected.
4. Remove and reclaim refrigerant from system be-
fore touching or disturbing anything inside termi-
nal box if refrigerant leak is suspected around
compressor terminals.
5. Never attempt to repair soldered connection while
refrigerant system is under pressure.
6. Do not use torch to remove any component. Sys-
tem contains oil and refrigerant under pressure.
To remove a component, wear protective goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Remove and reclaim refrigerant from system.
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

start-up:

1. Remove all access panels.
2. Read and follow instructions on all WARNING, CAU-
TION, and INFORMATION labels attached to, or shipped
with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections
and on unit base. Detecting oil generally indicates
a refrigerant leak. Leak-test all refrigerant tubing
connections using electronic leak detector, halide torch,
or liquid-soap solution.
c. Inspect all field- and factory-wiring connections. Be
sure that connections are completed and tight.
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that condenser-fan blades are correctly
positioned in fan orifices. Blades should clear fan
motor and fan orifice ring.
b. Make sure that return-air filters and outdoor-air
inlet screens are in place.
c. Make sure that the condensate trap is filled with
water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
5. Loosen the compressor holddown bolts until sideways
movement of the washer under each holddown bolt can
be obtained. Do not loosen completely as bolts are self-
locking and will maintain adjustment. Open compres-
sor valves.
6. Make sure refrigerant service port caps are tight. Each
refrigerant system has one suction port located in the
top of the compressor motor casing. All units also have
one service port on the liquid line valve and one on the
compressor discharge valve.
7. Crankcase heaters are energized as long as there is
power to the unit, except when the compressors are
operating.
IMPORTANT: Unit power must be on for 24 hours prior to
start-up. Otherwise, damage to compressor may result.
8. Ensure that the suction, discharge, and liquid line serv-
ice valves are open. Damage to the compressor could
result if they are left closed.
9. Check Direct Digital Controls DIP (dual-in-line pack-
age) switch configuration. The Direct Digital Control
(DDC) board must be configured for each applica-
tion. The DDC board is configured through the DIP
switches located on the board. There are 8 DIP switches
which configure 8 different applications of the DDC. See
Table 4. DIP switch 1 is on the left of the block. DIP
switch 8 is on the right of the block. To open a DIP
switch, push the switch up with suitable tool (small-
blade screwdriver). To close a DIP switch, push the switch
down. Factory settings are shown in Table 5.
The DIP switch configurations for the unit control soft-
ware are as follows:
• DIP switch 1 should be set to closed (CV operation)
• DIP switch 2 should be set to closed (thermostat)
• DIP switch 3 is used to enable expansion board
operation
• DIP switch 4 is used to field test the unit
• DIP switch 5 is used to specify the type of power
exhaust
—20—