Brazing Connections - Lennox CBA25UHV-018 Unit Information

1 5/8 (41) TOP VIEW
11 3/8
(289)
1 5/8 (41)
20 (508)
1 5/8 (41)
22 5/8 (575) -018/024
24 5/8 (625) -030, 036
26 5/8 (676) -042, 048, 060
13 1/2 (343)
5/8 (16)
OPENING
SIDE VIEW
FIGURE 19. Downflow Combustible Base Dimensions

Brazing Connections

WARNING
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.
IMPORTANT
To prevent the build-up of high levels of nitrogen when
purging, it must be done in a well-ventilated area. Purge
low-pressure nitrogen (1 to 2 psig) through the refrigerant
piping during brazing. This will help to prevent oxidation
and the introduction of moisture into the system.
23-1/4 (591)
SUPPLY AIR OPENING
INCHES (MM)
3 (76)
Page 22
WARNING
Danger of explosion!
Can cause equipment damage, injury, or
death.
When using a high pressure gas such as
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).
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.
WARNING
When using a high pressure gas such as
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).
TABLE 5. CBA25UHV Refrigerant Connections and
Line Set Requirements
Liquid Vapor
Model
Line
-018/ 3/8ʺ
024 (10mm) (19mm)
-030 3/8ʺ
-036 (10mm) (19mm)
-042 3/8ʺ
-048 (10mm) (22mm)
3/8ʺ
-060
(10mm) (22mm)
NOTE - Some applications may require a field-provided 7/8ʺ
to 1-1/8ʺ adapter.
NOTE - When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and Fab-
rication Guidelines, CORP. 9351-L9, or contact Lennox
Technical Support Product Applications for assistance.
L15 Line Sets
Line
3/4ʺ L15 line set sizes are
dependant on unit
match-up. See Product
3/4ʺ
Specifications (EHB) for
outdoor unit to determine
7/8"
correct line set sizes
7/8"
Field fabricated