American Standard 4A7A5 Installer's Manual page 4

INSTALLER'S GUIDE
10. The gas valve can now be opened. For a ball type gas valve,
open the gas valve by removing the shut-off valve cap and turning
the valve stem 1/4 turn counterclockwise, using 1/4" Open End or
Adjustable wrench. See Figure 4. For brass gas line service valve
opening, follow 8 and 9 on page 3. See Figure 5.
11. The gas valve is now open for refrigerant flow. Replace valve
stem cap to prevent leaks. Again, these caps MUST BE RE-
PLACED to prevent leaks. Replace valve stem and pressure tap
cap finger tight, then tighten an additional 1/6 turn. See Figure 4.
If refrigerant lines are longer than fifteen (15) feet and/or a
different size than recommended, it will be necessary to adjust
system refrigerant charge upon completion of installation. See
page 6 or unit Service Facts.
E. ELECTRICAL CONNECTIONS
WARNING:
this equipment, ALWAYS exercise basic safety precau-
tions to avoid the possibility of electric shock.
1. Power wiring and grounding of equipment must comply with
local codes.
2. Power supply must agree with equipment nameplate.
3. Install a separate disconnect switch at the outdoor unit.
4. Ground the outdoor unit per local code requirements.
5. Provide flexible electrical conduit whenever vibration trans-
mission may create a noise problem within the structure.
6. The use of color coded low voltage wire is recommended to
simplify connections between the outdoor unit, the thermostat
and the indoor unit.
Table 1 — NEC Class II Wiring
WIRE SIZE
18 AWG
16 AWG
14 AWG
7. Table 1 defines maximum total length of low voltage wiring
from outdoor unit, to indoor unit, and to thermostat.
8. Mount the indoor thermostat in accordance with instruction
included with the thermostat. Wire per appropriate hookup
diagram (included in these instructions).
PAGE 4
When installing or servicing
24 VOLTS
MAX. WIRE LENGTH
150 FT
225 FT.
300 FT.
F. COMPRESSOR START-UP
After all electrical wiring is complete, SET THE THERMOSTAT
SYSTEM SWITCH IN THE OFF POSITION SO COMPRESSOR
WILL NOT RUN, and apply power by closing the system main
disconnect switch. This will activate the compressor sump heat
(where used). Do not change the Thermostat System Switch until
power has been applied for one (1) hour. Following this procedure
will prevent potential compressor overload trip at the initial
start-up.
G. OPERATIONAL AND CHECKOUT PROCEDURES
Final phases of this installation are the unit Operational and
Checkout Procedures which are found in this instruction on
page 8. To obtain proper performance, all units must be operated
and charge adjustments made in accordance with procedures
found on page 6 and in the Service Facts.
IMPORTANT: Perform a final unit inspection to be sure that
factory tubing has not shifted during shipment. Adjust tubing if
necessary so tubes do not rub against each other when the unit
runs. Also be sure that wiring connections are tight and wire
routing is secure.
H. SEACOAST SALT SHIELD
BAYSEAC001 (Seacoast Kit) is available for application on units
installed within one (1) mile of salt water, including seacoasts
and inland waterways.
I. TROUBLESHOOTING
TROUBLESHOOTING CHART — WHAT TO CHECK
SYSTEM FAULTS
REFRIGERANT CIRCUIT
Liquid Pressure Too High
Liquid Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback TXV System
I.D. Coil Frosting
Compressor Runs Inadequate or No Cooling
ELECTRICAL
Compressor & O.D. Fan Do Not Start P P
Compressor Will Not Start But O.D. Fan Runs P S P
O.D. Fan Won't Start P P
Compressor Hums But Won't Start P P
Compressor Cycles on IOL P S P
I.D. Blower Won't Start P S
P - Primary Causes S - Secondary Causes
P P S P
S P
S P P
S
P
S P P S
S P P P
P P S
P P S S
P P S P S P S S S
S P P
Pub. No. 11-AC24D1-1
S S S
S S S S
S P
S P S
S S
P S
S P S
S S