York 10 SEER Installation Instruction page 9

9. Tightening couplings.
a. Tighten indoor coil couplings with wrenches; using
wrench on stationary fitting of coupling and liquid
line fitting at coil while nut is being tightened. See
Figure 9. Tighten the nut until the coupling bottoms
out.
b. Then tighten an additional 1/6 turn to complete the
knife edge seal.
c. Tighten outdoor unit couplings, with wrenches using
a wrench on the stationary fitting of the coupling
while nut is being tightened. Tighten the nut until the
coupling bottoms out.
d. Then tighten an additional 1/6 turn to complete the
knife edge seal.
FIGURE 9 : QUICK CONNECT COUPLING
CONNECTION
10. Check for leaks.
a. After the line set connections have been made they
should be checked for leaks.
b. If the valves were kept clean and lubricated per
instruction no leaks should be found.
c. Use leak detect solution or soap solution for leak
testing. An electronic leak detector is recom-
mended.
Unitary Products Group
ELECTRICAL WIRING
To prevent electrical shock, open remote disconnect
so electrical supply to outdoor unit is shut off. Con-
tactor does not open both sides of the 208/230 volt
electrical circuit.
POWER SUPPLY
All wiring must comply with N.E.C. and local codes. See rat-
ing plate and product data sheet for volts, frequency, phase,
maximum fuse size and minimum branch circuit ampacity.
Refer to the wiring diagram inside the unit control box cover
before connecting to power supply.
1. The 208/230 volt single phase line voltage service wiring
for the outdoor unit must include a disconnect switch
located within sight of the outdoor unit.
2. Use the correct size fuse or circuit breaker as listed on
the unit rating plate and data sheet. If using nonmetallic-
sheathed cable (NM or NM-B) ampacities shall be that of
60° C conductors per N.E.C 336-26.
3. Wiring connections. - Two are provided in the control
box:
a. One for low voltage wiring.
b. One entrance for high voltage L1 and L2.
The adjustable High Voltage Conduit Plate is factory installed
for 1/2" conduit connections. For 3/4" conduit, remove the
screw holding the plate in place and adjust the location of the
holes. For 1" conduit, remove the conduit plate and discard.
Re-install screw to maintain the integrity of the unit structure,
regardless of the conduit being used. See Figures 10, 11 &
12.
4. Power connection to the unit is facilitated by screw termi-
nals, L1 and L2 on the outdoor unit contactor. See Fig-
ures 10, 11 & 12.
5. Ground the outdoor unit using the ground lug provided.
Unless the outdoor unit is grounded through proper wir-
ing to the service entrance ground, a suitable separate
ground should be provided at the outdoor unit.
6. Use copper conductors only.
Casing or cabinet must be permanently grounded in
accordance with National Electric Code or other
applicable local codes.
035-15713-003 REV. A (0500)
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