Lennox Elite Series Installation Instructions Manual page 6

NOTE - It may be necessary to bypass the low pressure
switches if equipped to ensure complete refrigerant
evacuation.
3. When the low side system pressures reach 0 psig,
close the suction line valve,
4. Check gauges after shutdown to confirm that the
valves are not allowing refrigerant to flow back into the
low side of the system.
Perform the following task at the existing outdoor unit:
• Disconnect line set at the service valves,
• Disconnect electrical service at the disconnect switch.
• Remove old outdoor unit,
A CAUTION
See Unit Dimensions on page 3 for sizing mounting slab,
platforms or supports. Refer to figure 7 for mandatory
installation clearance requirements.
CONTROL PANEL
ACCESS LOCATION
* SEE NOTES BELOW THIS FIGURE FOR FURTHER DETAILS.
Figure 7. Installation Clearances
NOTES:
• Service clearance of 30 in. (762 mm) must be
maintained on one of the sides adjacent to the control
box.
• Clearance to one of the other three sides must be 36
in, (914 mm).
• Clearance to one of the remaining two sides may be
12 in, (305 mm) and the final side may be 6 in, (152
mm).
• 48 in. (1219 mm) clearance required on top of unit.
• A clearance of 24 in. (610 mm) must be maintained
between two units,
POSITIONING CONSIDERATIONS
Consider the following when positioning the unit:
• Some localities are adopting sound ordinances based
on the unit's sound level registered from the adjacent
property, not from the installation property. Install the
unit as far as possible from the property line,
• When possible, do not install the unit directly outside
a window, Glass has a very high level of sound
transmission, For proper placement of unit in relation
to a window see the provided illustration in figure 8.
INSTALL UNIT AWAY
FROMWINDOWS--------' II --
IIIIIH Ills
Figure 8. Outside Unit Placement
PLACING UNIT ON SLAB
When installing unit at grade level, the top of the slab
should be high enough above grade so that water from
higher ground will not collect around the unit. The slab
should have a slope tolerance as described in figure 9,
NOTE - If necessary for stability, anchor unit to slab as
described in Stabilizing Unit on Uneven Surfaces on page
7,
INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE OF 2
DEGREES (OR 2 INCHES PER 5 FEET [50 MM PER 1.5 M]) AWAY FROM BUILDING
STRUCTURE.
iL
BUILDING
STRUCTURE
_-r
MOUNTING
SLAB --T-
GROUNDLEVEL
Figure 9. Slab Mounting at Ground Level
ELEVATING THE UNIT (SMALL-BASE UNITS)
If additional elevation is necessary, raise the unit by
extending the length of the unit support feet. This may be
done by cutting four equal true-cut lengths of Schedule
(SCH) 40, 4" (101.6mm) piping to the height required as
illustrated in figure 10.
505329M 04/08
Page 6