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506083−01 03/08
Unit Dimensions − Inches (mm)
SIDE VIEW
SUCTION AND LIQUID LINE
CONNECTION
DISCHARGE AIR
SIDE VIEW
OUTDOOR COIL FAN
COMPRESSOR
A
B
A
OPTIONAL UNIT STAND-OFF KIT (4)
(FIELD INSTALLED)
Model Numbers
A
B
TSA036H4N41
28−1/4 (718)
37−1/4 (946)
TSA042H4N41
28−1/4 (718)
29−1/4 (743)
TSA048H4N41
28−1/4 (718)
37−1/4 (946)
TSA060H4N41
32−1/4 (819)
33−1/4 (845)
WARNING
This product and/or the indoor unit it is matched
with may contain fiberglass wool.
Disturbing the insulation during installation,
maintenance, or repair will expose you to fiberglass
wool dust. Breathing this may cause lung cancer.
(Fiberglass wool is known to the State of California
to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
General Information
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. Table 1 shows
torque values for fasteners.
Table 1. Torque Requirements
Parts
Recommended Torque
Service valve cap
8 ft.− lb.
11 NM
Sheet metal screws
16 in.− lb.
2 NM
Machine screws #10
28 in.− lb.
3 NM
Compressor bolts
90 in.− lb.
10 NM
Gauge port seal cap
8 ft.− lb.
11 NM
USING MANIFOLD GAUGE SETS
When checking the system charge, only use a manifold
gauge set that features low loss anti−blow back fittings.
See figure 1 for a typical manifold gauge connection setup
for charging.
Manifold gauge sets used with HFC−410A refrigerant
systems must be capable of handling the higher system
operating pressures. The gauges should be rated for use
with pressures of 0 − 800 on the high side and a low side of
30" vacuum to 250 psi with dampened speed to 500 psi.
Gauge hoses must be rated for use at up to 800 psi of
pressure with a 4000 psi burst rating.
OPERATING SERVICE VALVES
IMPORTANT
Only use Allen wrenches of sufficient hardness
(50Rc − Rockwell Harness Scale minimum). Fully
insert the wrench into the valve stem recess.
Service valve stems are factory−torqued (from 9
ft−lbs for small valves, to 25 ft−lbs 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.
The liquid and suction line service valves are used for
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.
