Lennox TSA024S4N41T, TSA030S4N41M, TSA024S4N41M, TSA030S4N41T, TSA036S4N41M Installation Instructions Manual
...
INSTALLATION
2010 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs AND HFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
INSTRUCTIONS
T−Classt TSA*S4 Units
M and T Voltages
AIR CONDITIONER
506663−01
11/10
Supersedes 506418−01
TABLE OF CONTENTS
Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Unit 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Unit Parts Arrangement 2. . . . . . . . . . . . . . . . . . .
Model Number Identification 3. . . . . . . . . . . . . . . . . . . . . .
General Information 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Gauge Set and Service Valves 3. . . . . . . . . . .
Recovering Refrigerant from Existing System 5. . . . . . .
New Outdoor Unit Placement 6. . . . . . . . . . . . . . . . . . . . .
New or Replacement Line Set 7. . . . . . . . . . . . . . . . . . . . .
Brazing Connections 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Line Set and Indoor Coil 12. . . . . . . . . . . . . . . .
Installing Indoor Metering Device 13. . . . . . . . . . . . . . . .
Leak Test Line Set and Indoor Coil 14. . . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil 15. . . . . . . . . . . . .
Electrical Connections 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge 20. . . . . . . . . . .
Unit Start−Up 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Performance Checklist 27. . . . . . . . . . . . . .
Litho U.S.A.
IMPORTANT
This unit must be matched with an indoor coil as specified in Lennox Engineering Handbook. Coils previously charged with HCFC−22 must be flushed.
NOTICE TO INSTALLER
UNIT PLACEMENT
It is critical for proper unit operation to place outdoor unit on an
elevated surface as described in Unit Placement section on page 6.
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 9 to avoid damaging the service valve’s internal seals.
11/10 506663−01
*2P1110* *P506663-01*
Shipping and Packing List
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1 Assembled outdoor unit
1 Liquid line filter drier
Outdoor Unit
This outdoor unit is designed for use with HFC−410A
refrigerant only. This unit must be installed with an
approved indoor air handler or coil. See the Lennox
TSA*S4 Engineering Handbook for approved indoor
component matchups.
This outdoor unit is designed for use in thermal expansion
valve (TXV) systems only.
Page 1
Unit Dimensions − Inches (mm)
A
OUTDOOR COIL FAN
COMPRESSOR
A
Discharge Air
B
SUCTION AND LIQUID LINE
OPTIONAL UNIT STAND-OFF KIT
SIDE VIEW
CONNECTIONS
(4) (FIELD−INSTALLED)
SIDE VIEW
Model Number A B
TSA024S4N41T and M 24−1/4 (616) 25−1/4 (641)
TSA030S4N41T and M 24−1/4 (616) 29−1/4 (743)
TSA036S4N41M 28−1/4 (724) 29−1/4 (743)
TSA036S4N41T 24−1/4 (616) 29−1/4 (743)
TSA048S4N41T and M 28−1/4 (724) 37−1/4 (925)
TSA060S4N41T and M 28−1/4 (724) 33−1/4 (845)
Typical Unit Parts Arrangement
CONTROL
DUAL RUN CAPACITOR
(C12) (T−VOLTAGE)
SINGLE RUN CAPACITOR
(C12) (M−VOLTAGE)
GROUND LUG
CONTACTOR (K1)
LOCATION
OR
TWO−POLE
(M−VOLTAGE)
CUTOUT FOR HIGH
VOLTAGE CONDUIT
ONE POLE
(T−VOLTAGE)
NOTE: PLUMBING LAYOUT MAY
VARY SLIGHTLY BETWEEN
MODEL SIZES.
HIGH PRESSURE
SWITCH (S4)
CRANKCASE HEATER
THERMOSTAT (S40)
LIQUID LINE
SERVICE VALVE
SUCTION LINE
SERVICE VALVE
Figure 1. Typical Unit Parts Arrangement
506663−01 11/10
Page 2
Model Number Identification
TSA M1036 S 44 N
T = T−Class Product Line
S = Split−System Air Conditioner
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
IMPORTANT
This model is designed for use in expansion valve
systems only. An indoor expansion valve approved for
use with HFC−410A refrigerant must be ordered
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.
Vol ta ge
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
Part Load Capability
N = No part load, single stage compressor
Refrigerant Type
4 = R−410A
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.
See the Lennox Service and Application Notes #C−08−1
for further details and information.
IMPORTANT
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.
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 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 SET
When checking the system charge, only use a manifold
gauge set that features low loss anti−blow back fittings.
Page 3
TSA*S4 SERIES
Manifold gauge set 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 psig on the high side and a low
side of 30" vacuum to 250 psig with dampened speed to
500 psi. Gauge hoses must be rated for use at up to 800
psig of pressure with a 4000 psig burst rating.
OPERATING SERVICE VALVES
The liquid and vapor line service valves are used for
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.
Each valve is equipped with a service port which has a
factory−installed valve stem. Figure 2 provides information
on how to access and operating both angle and ball service
valves.
Operating Angle Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use a service wrench with a hex−head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve sizes) to back
the stem out counterclockwise as far as it will go.
SERVICE PORT CAP
SERVICE PORT CORE
TO INDOOR
UNIT
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
SERVICE PORT
CORE
TO OUTDOOR UNIT
ANGLE−TYPE SERVICE VALVE
(BACK−SEATED OPENED)
When service valve is OPEN, the service port is
open to linE set, indoor and outdoor unit.
Operating Ball Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use an appropriately sized wrenched to open. To open valve,
rotate stem counterclockwise 90°. To close rotate stem
clockwise 90°.
TO INDOOR UNIT
TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT
SERVICE PORT
CORE
CAP
TO OUTDOOR
UNIT
BALL (SHOWN
CLOSED)
VALV E
STEM
STEM CAP
STEM CAP
ANGLE−TYPE SERVICE VALVE
(FRONT−SEATED CLOSED)
WHEN SERVICE VALVE IS CLOSED, THE SERVICE PORT IS OPEN
TO
THE LINE SET AND INDOOR UNIT.
To Access Service Port:
A service port cap protects the service port core from contamination and
serves as the primary leak seal.
1. Remove service port cap with an appropriately sized wrench.
2. Connect gauge set to service port.
3. When testing is completed, replace service port cap and tighten as
follows:
With torque wrench: Finger tighten and
torque cap per table 1.
Without torque wrench: Finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:
9
10
8
11
12
7
6
With Torque Wrench: Finger tighten and
then torque cap per table 1.
Without Torque Wrench: Finger tight-
en and use an appropriately sized
wrench to turn an additional 1/12 turn
clockwise.
10
9
12
11
8
7
6
1/6 TURN
1
2
3
4
5
1/12 TURN
1
2
3
4
5
NOTE A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque.
Figure 2. Angle and Ball Service Valves
506663−01 11/10
Page 4
Recovering Refrigerant from Existing System
RECOVERING
REFRIGERANT FROM SYSTEM
DISCONNECT POWER
Disconnect all power to the existing outdoor unit at the service
1
disconnect switch or main fuse box/breaker panel.
SERVICE
DISCONNECT
SWITCH
RECOVERING REFRIGERANT
Remove existing refrigerant using one of the following procedures:
3
IMPORTANT Some system configurations may contain higher than normal refrigerant charge due to either large internal coil volumes,
and/or long line sets.
CONNECT MANIFOLD GAUGE SET
Connect a gauge set, clean recovery cylinder and a recovery
2
machine to the service ports of the existing unit. Use the
instructions provided with the recovery machine to make the
connections.
MANIFOLD GAUGES
RECOVERY MACHINE
LOW
CLEAN RECOVERY
CYLINDER
OUTDOOR UNIT
HIGH
METHOD 1:
Us this method if the existing outdoor unit is not equipped with shut−off valves, or if the unit is not operational and you plan to use the existing to
flush the system.
Remove all refrigerant from the existing system. Check gauges after shutdown to confirm that the entire system is completely void of refrigerant.
METHOD 2:
Use this method if the existing outdoor unit is equipped with manual shut−off valves, and you plan to use new refrigerant to flush the system.
The following devices could prevent full system charge recovery into the outdoor unit:
Outdoor unit’s high or low−pressure switches (if applicable) when tripped can cycle the compressor OFF.
Compressor can stop pumping due to tripped internal pressure relief valve.
Compressor has internal vacuum protection that is designed to unload the scrolls (compressor stops pumping) when the pressure ratio meets
a certain value or when the suction pressure is as high as 20 psig. (Compressor suction pressures should never be allowed to go into a vacuum.
Prolonged operation at low suction pressures will result in overheating of the scrolls and permanent damage to the scroll tips, drive bearings and
internal seals.)
Once the compressor can not pump down to a lower pressure due to one of the above system conditions, shut off the vapor valve. Turn OFF the
main power to unit and use a recovery machine to recover any refrigerant left in the indoor coil and line set.
Perform the following task:
A Start the existing system in the cooling mode and close the liquid line valve.
B Use the compressor to pump as much of the existing HCFC−22 refrigerant into the outdoor unit until the outdoor system is full. Turn the outdoor unit
main power OFF and use a recovery machine to remove the remaining refrigerant from the system.
NOTE It may be necessary to bypass the low pressure switches (if equipped) to ensure complete refrigerant evacuation.
C When the low side system pressures reach 0 psig, close the vapor line valve.
D Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system.
Figure 3. Refrigerant Recovery
Page 5
TSA*S4 SERIES
CLEARANCE ON ALL SIDES INCHES (MILLIMETERS)
MINIMUM CLEARANCE
ABOVE UNIT
6 (152)
12 (305)
MINIMUM CLEARANCE BETWEEN
DETAIL A
Install unit away
from windows .
36 (914)
TWO UNITS
30 (762)
LINE SET
CONNECTIONS
24 (610)
ACCESS PANEL
Figure 4. Installation Clearances
NOTES:
Clearance to one of the other three
sides must be 36 inches (914mm).
Clearance to one of the remaining
two sides may be 12 inches
(305mm) and the final side may be
6 inches (152mm).
DETAIL B
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.
STRUCTURE
48 (1219)
DISCHARGE AIR
Two 90° elbows
installed in line set will
reduce line set vibration.
Figure 5. Placement, and Slab Mounting
New Outdoor Unit Placement
See Unit Dimensions on page 2 for sizing mounting slab,
platforms or supports. Refer to figure 4 for mandatory
installation clearance requirements.
POSITIONING CONSIDERATIONS
CAUTION
In order to avoid injury, take proper precaution when lifting heavy objects.
506663−01 11/10
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
GROUND LEVEL
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 5.
Page 6
PLACING OUTDOOR UNIT ON SLAB
When installing a unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground would not collect around the unit as
illustrated in figure 5.
Slab may be level or have a slope tolerance away from the
building of not more than two degrees, or 2 inches per 5
feet (51 mm per 1524 mm) as illustrated in figure 5.
Slab may be level or have a slope tolerance away from the
building of not more than two degrees, or 2 inches per 5
feet (51 mm per 1524 mm) as illustrated in figure 5.
INSTALLING OUTDOOR UNIT ON ROOF
Install the unit at a minimum of 4 inches (102 mm) above
the surface of the roof. Ensure the weight of the unit is
properly distributed over roof joists and rafters. Redwood
or steel supports are recommended.
New or Replacement Line Set
This section provides information on new installation or
replacement of existing line set. If a new or replacement
line set is not required, then proceed to Brazing
Connections on page 9.
If refrigerant lines are routed through a wall, seal and
isolate the opening so vibration is not transmitted to the
building. Pay close attention to line set isolation during
installation of any HVAC system. When properly isolated
from building structures (walls, ceilings. floors), the
refrigerant lines will not create unnecessary vibration and
subsequent sounds.
Also, consider the following when placing and installing a
high−efficiency air conditioner:
REFRIGERANT LINE SET
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (braze connections) to the indoor unit
coil (flare or braze connections). Use Lennox L15 (braze,
non−flare) series line set, or use field−fabricated refrigerant
lines as listed in table 2.
IMPORTANT
Mineral oils are not compatible with HFC−410A. If oil
must be added, it must be a Polyol ester oil.
The compressor is charged with sufficient Polyol ester oil
for line set lengths up to 50 feet. Recommend adding oil to
system based on the amount of refrigerant charge in the
system. No need to add oil in system with 20 pounds of
refrigerant or less. For systems over 20 pounds − add one
ounce of every five pounds of refrigerant.
Recommended topping−off POE oils are Mobil EAL
ARCTIC 22 CC or ICI EMKARATE RL32CF.
MATCHING WITH NEW OR EXISTING INDOOR COIL
AND LINE SET
The RFC1−metering line consisted of a small bore copper
line that ran from condenser to evaporator coil. Refrigerant
was metered into the evaporator by utilizing
temperature/pressure evaporation effects on refrigerant in
the small RFC line. The length and bore of the RFC line
corresponded to the size of cooling unit.
If the TSA*S4 is being used with either a new or existing
indoor coil which is equipped with a liquid line which served
as a metering device (RFCI), the liquid line must be
replaced prior to the installation of the TSA*S4 unit.
Typically a liquid line used to meter flow is 1/4" in diameter
and copper.
LIQUID LINE FILTER DRIER INSTALLATION
The filter drier (one is shipped with each TSA*S4 unit) must
be field installed in the liquid line between the outdoor unit’s
liquid line service valve and the indoor coil’s metering
device (fixed orifice or TXV) as illustrated in figure 6. This
filter drier must be installed to ensure a clean,
moisture−free system. Failure to install the filter drier will
void the warranty. A replacement filter drier is available
from Lennox. See Brazing Connections on page 9 for
special procedures on brazing filter drier connections to
the liquid line.
BRAZE CONNECTION POINTS
NOTE − When installing refrigerant lines longer than 50
feet, contact Lennox Technical Support Product
Applications for assistance or Lennox piping manual. To
obtain the correct information from Lennox, be sure to
communicate the following points:
Model (TSA*S4) and size of unit (e.g. −060).
Line set diameters for the unit being installed as listed
in table 2 and total length of installation.
Number of elbows and if there is a rise or drop of the
piping.
Page 7
LIQUID
LINE
OUTDOOR
UNIT
LIQUID LINE
SERVICE VALVE
LINE
LIQUID LINE
FILTER DRIER
Figure 6. Typical Liquid Line Filter Drier Installation
TSA*S4 SERIES
Table 2. Refrigerant Line Set Inches (mm)
Model
Liquid Line Vapor Line Liquid Line Vapor Line L15 Line Sets
TSA024S4N4 3/8 in. (10 mm) 3/4 in. (19 mm) 3/8 in. (10 mm) 3/4 in. (19 mm) L15−41 15 ft. − 50 ft. (4.6 m − 15 m)
TSA036S4N4
TSA048S4N4
3/8 in. (10 mm) 7/8 in. (22 mm) 3/8 in. (10 mm) 7/8 in. (22 mm) L15−65 15 ft. − 50 ft. (4.6 m − 15 m)
TSA060S4N4 3/8 in. (10 mm) 1−1/8 in. (29 mm) 3/8 in. (10 mm) 1−1/8 in. (29 mm) Field Fabricated
NOTE Some applications may required a field provided 7/8" to 1−1/8" adapter
Field Connections Recommended Line Set
INSTALLATION
Line Set Isolation The following illustrations are
examples of proper refrigerant line set isolation:
REFRIGERANT LINE SET TRANSITION
FROM VERTICAL TO HORIZONTAL
ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
NON−CORROSIVE
METAL SLEEVE
AUTOMOTIVE
MUFFLER-TYPE HANGER
STRAP LIQUID LINE TO
VAPOR LINE
LIQUID LINE
VAPOR LINE − WRAPPED
IN ARMAFLEX
REFRIGERANT LINE SET INSTALLING
HORIZONTAL RUNS
To hang line set from joist or rafter, use either metal strapping material
or anchored heavy nylon wire ties.
8 FEET (2.43 METERS)
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
FLOOR JOIST OR
ROOF RAFTER
TAPE OR
WIRE TIE
FLOOR JOIST OR
ROOF RAFTER
NON−CORROSIVE
METAL SLEEVE
STRAP THE VAPOR LINE TO THE JOIST
OR RAFTER AT 8 FEET (2.43 METERS)
INTERVALS THEN STRAP THE LIQUID
LINE TO THE VAPOR LINE.
WIRE TIE (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIE
8 FEET (2.43 METERS)
IMPORTANT Refrigerant lines must not contact structure.
REFRIGERANT LINE SET INSTALLING
VERTICAL RUNS (NEW CONSTRUCTION SHOWN)
NOTE Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or greater
than 20 psig.
IMPORTANT Refrigerant lines must not contact wall
OUTSIDE WALL
WOOD BLOCK
BETWEEN STUDS
VAPOR LINE WRAPPED
WITH ARMAFLEX
OUTSIDE
WALL
PVC
PIPE
FIBERGLASS
INSULATION
VAPOR LINE
SLEEVE
CAULK
LIQUID
LINE
NOTE Similar installation practices should be used if line set is
to be installed on exterior of outside wall.
LIQUID LINE
WIRE TIE
INSIDE WALL
STRAP
NON−CORROSIVE
METAL SLEEVE
WIRE TIE
WOOD BLOCK
WIRE TIE
STRAP
506663−01 11/10
Figure 7. Line Set Installation
Page 8
IMPORTANT
If this unit is being matched with an approved line set
or indoor unit coil which was previously charged with
mineral oil, or if it is being matched with a coil which
was manufactured before January of 1999, the coil
and line set must be flushed prior to installation. Take
care to empty all existing traps. Polyol ester (POE) oils
are used in Lennox units charged with HFC−410A
refrigerant. Residual mineral oil can act as an
insulator, preventing proper heat transfer. It can also
clog the expansion device, and reduce the system
performance and capacity.
Failure to properly flush the system per the
instructions below will void the warranty.
CAUTION
Brazing alloys and flux contain materials which are
hazardous to your health.
Avoid breathing vapors or fumes from brazing
operations. Perform operations only in well−ventilated
areas.
Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and flux.
IMPORTANT
Brazing Connections
Use the procedures outline in figures 8 and 9 for brazing
line set connections to service valves.
IMPORTANT
Polyol ester (POE) oils used with HFC−410A
refrigerant absorb moisture very quickly. It is very
important that the refrigerant system be kept closed
as much as possible. DO NOT remove line set caps
or service valve stub caps until you are ready to make
connections.
WARNING
Danger of fire. Bleeding the refrigerant
charge from only the high side may result
in pressurization of the low side shell and
suction tubing. Application of a brazing
torch to a pressurized system may result
in ignition of the refrigerant and oil
mixture − Check the high and low
pressures before applying heat.
WARNING
When using a high pressure gas such as
dry nitrogen to pressurize a refrigeration
or air conditioning system, use a
regulator that can control the pressure
down to 1 or 2 psig (6.9 to 13.8 kPa).
Connect gauge set low pressure side to vapor line
service valve and repeat procedure starting at
paragraph 4 for brazing the liquid line to service port
valve.
IMPORTANT
Allow braze joint to cool before removing the wet rag
from the service valve. Temperatures above 250ºF can
damage valve seals.
IMPORTANT
Use silver alloy brazing rods with 5% minimum silver
alloy for copper−to−copper brazing. Use 45% minimum
alloy for copper−to−brass and copper−to−steel brazing.
WARNING
Fire, Explosion and Personal Safety
Hazard.
Failure to follow this warning could
result in damage, personal injury or
death.
Never use oxygen to pressurize or
purge refrigeration lines. Oxygen,
when exposed to a spark or open
flame, can cause fire and/or an explosion, that could result in property
damage, personal injury or death.
Page 9
TSA*S4 SERIES
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