6
Multiple Outdoor Units
Height of
Wall (C)
Unit
Height (A)
118 (2997)
(Minimum
)
Unit to
Wall (B
)
24 (610)
(Minimum)
60 (1500)
(Minimum
)
10 (254
)
(Minimum
)
10 (254
)
(Minimum
)
AIR
FLOW
AIR
FLOW
CLEARANCE NOTES FOR MULTIPLE UNITS:
If the height of the wall (C) is less than or equal to the height of the smallest unit (A), the distance from the unit to the wall (B) must be a minimum of 10 inches (254 mm).
If 1/2 the height of the unit (A) is less than the height of the wall (C), the distance from the unit to the wall (B) must be a minimum of 12 inches (305 mm).
If the height of the wall (C) is greater than the height of the unit (A), the distance from the unit to the wall (B) must be a minimum of 20 inches (508 mm).
Figure 10. Multiple Outdoor Unit Clearances - Inches (mm)
Torque Requirements for Caps and
Fasteners
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. “Table 2. Torque
Requirements” on page 6 provides torque values for
fasteners.
IMPORTANT
Only use Allen wrenches of sufficient hardness (50Rc -
Rockwell scale minimum). Fully insert the wrench into
the valve stem recess.
Service valve stems are factorytorqued from 9 ft.lbs.
(12 N*m) for small valves, to 25 ft.lbs. (34 N) for large
valves) to prevent refrigerant loss during shipping and
handling. Using an Allen wrench rated at less than 50Rc
risks rounding or breaking off the wrench, or stripping
the valve stem recess.
See the Lennox Service and Application Notes C081
for further details and information.
Table 2. Torque Requirements
Parts
Recommended Torque
U.S.
Newton-Meter- N
Service valve cap
8 ft.lb.
11
Sheet metal screws
16 in.-lb.
2
Table 2. Torque Requirements
Parts
Recommended Torque
U.S.
Newton-Meter- N
Machine screws #10
27 in.-lb.
3
Compressor bolts
7 ft.-lb.
10
Gauge port seal cap
8 ft.lb.
11
Indoor Unit Installation
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
Unit Placement Considerations
AVOID
Do not install the unit in the following locations:
• Areas exposed to petrochemicals or petrochemical
products.
• Areas exposed to salt or other corrosive materials or
caustic gases.
• Areas exposed to extreme voltage variations (such as
factories).
• Tightly enclosed areas that may impede service of the
unit.
