Indoor Unit; Torque Requirements For Caps And Fasteners; Indoor Unit Installation; Unit Placement Considerations - Lennox MPA024S4S-*P Installation Instructions Manual

Indoor Unit

Torque Requirements for Caps and
Fasteners
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. "Table 1. Torque
Requirements" 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 factory-torqued from 9 ft.-lbs.
(12 N) 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 C-08-1
for further details and information.
CEILING APPLICATIONS
3/4
(19)
SIDE VIEW
(Service Clearance
CEILING AND FLOOR APPLICATIONS
WALL
24
(610)
FRONT VIEW
FLOOR APPLICATIONS
Figure 5. Indoor Unit Clearances - Inches (mm)
DROP CEILING
SUPPLY
59 (1499)
AIR
Unit Flush with Wall
SUPPLY
AIR
59 (1499)
(Service Clearance
Front of Unit)
SIDE VIEW
Table 1. Torque Requirements
Parts
Service valve cap
Sheet metal screws
Machine screws #10
Compressor bolts
Gauge port seal cap

Indoor Unit Installation

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
7
WALL
24
(610)
Recommended Torque
U.S.
8 ft.-lb.
16 in.-lb.
27 in.-lb.
7 ft.-lb.
8 ft.-lb.
CAUTION
Newton-Meter- N
11
2
3
10
11