Model Number Identification; General Information; Operating Gauge Set And Service Valves - Lennox T?Class TSA*S4 Units Installation Instructions Manual

Model Number Identification

T = T−Classt Product Line
S = Split−System Air Conditioner
IMPORTANT
This model is designed for use in expansion valve
systems only. An indoor expansion valve approved for
use with HFC−410A
separately, and installed prior to operating the system.
CAUTION
Physical contact with metal edges and corners while
applying excessive force or rapid motion can result in
personal injury. Be aware of, and use caution when
working near these areas during installation or while
servicing this equipment.

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.

Operating Gauge Set and Service Valves

These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
TORQUE REQUIREMENTS
When servicing or repairing heating, ventilating, and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 1 lists torque values for
fasteners.
T S A
Brand/Family
Unit Type
Major Design Sequence
A = 1st Generation
B = 2nd Generation
024 = 2 Tons
030 = 2.5 Tons
0036 = 3 Tons
048 = 4 Tons
060 = 5Tons
Cooling Efficiency
S = Standard Efficiency
refrigerant must be ordered
036 S 4 N 4 1 M
Part Load Capability
N = No part load, single stage compressor
Refrigerant Type
4 = R−410A
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.
See the Lennox Service and Application Notes #C−08−1
for further details and information.
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. Table 1 provides
torque values for fasteners.
Table 1. Torque Requirements
Parts
Service valve cap
Sheet metal screws
Machine screws #10
Compressor bolts
Gauge port seal cap
USING MANIFOLD GAUGE SET
When checking the system charge, only use a manifold
gauge set that features low loss anti−blow back fittings.
Page 3
Voltage
M = 380/420V−3 phase 50hz
T = 220/240V−1 phase 50hz
Minor Design Sequence
1 = 1st Revision
2 = 2nd Revision
3 = 3rd Revision
Coil Type
4 = Four−sided
IMPORTANT
IMPORTANT
Recommended Torque
8 ft.− lb.
16 in.− lb.
28 in.− lb.
90 in.− lb.
8 ft.− lb.
11 NM
2 NM
3 NM
10 NM
11 NM
TSA*S4 SERIES