Bryant 701A - Manual (Page 12)

to be routed into the low-voltage splice box (located below right
side of control box). Stripped yellow wire is located in connection
box. Route leads through hole in bottom of control box and make
low-voltage connections (See Fig. 10). Secure all cut wires, so that
they do not interfere with operation of unit.
E. TRANSFORMER PROTECTION
The transformer is of the energy-limiting type. It is set to
withstand a 30-second overload or shorted secondary condition.
PRE-START-UP
WARNING: Failure to observe the following warnings
could result in serious personal 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 electrical power to unit.
b. Relieve and reclaim 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.
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 refrig-
erant leak. Leak test all refrigerant tubing connections
using electronic leak detector, halide torch, or liquid-
soap solution. If a refrigerant leak is detected, see Check
for Refrigerant Leaks section.
c. Inspect all field- and factory-wiring connections. Be sure
that connections are completed and tight.
d. Ensure electrical wiring does not contact refrigerant
tubes or sharp metal edges.
e. Inspect coil fins. If damaged during shipping and han-
dling, carefully straighten fins with a fin comb.
Verify the following conditions:
a. Make sure that condenser-fan blade is correctly posi-
tioned in fan orifice. Leading edge of condenser-fan
blade should be 1/2 in. maximum from fan orifice (See
Fig. 11).
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain trap is filled with water
to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
START-UP
A. CHECK FOR REFRIGERANT LEAKS
Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
1. Locate leak and make sure that refrigerant system pressure
has been relieved and reclaimed from both high- and
low-pressure ports.
2. Repair leak following accepted practices. NOTE: Install a
filter drier whenever the system has been opened for repair.
3. Add a small charge of R-22 refrigerant vapor to system and
leak-test unit.
4. Recover refrigerant from refrigerant system and evacuate to
500 microns if no additional leaks are not found.
5. Charge unit with R-22 refrigerant, using a volumetric-
charging cylinder or accurate scale. Refer to unit rating
plate for required charge. Be sure to add extra refrigerant to
compensate for internal volume of filter drier.
Fig. 10—High- and Control-Voltage Connections
C99010rev2
POWER
SUPPLY
FIELD-SUPPLIED
FUSED DISCONNECT
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
GND
CONTROL BOX
SPLICE BOX
LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)
Y
G
R
C
YEL(Y)
GRN(G)
RED(R)
BRN(C)
THERMOSTAT
(TYPICAL)
LEGEND
Field Control-Voltage Wiring
Field High-Voltage Wiring
Fig. 11—Fan Blade Clearance
C99009
FAN GRILLE MOTOR
1/8" MAX BETWEEN
MOTOR AND FAN HUB
MOTOR SHAFT
1/2˝
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