Lennox 2SHP13 Series User Manual

# 48306B006 Page 5
Installing Refrigerant Line
During the installation of an air conditioning system, it is
important to properly isolate the refrigerant line to prevent
unnecessary vibration. Line set contact with the structure
(wall, ceiling, or floor) may cause objectionable noise
when vibration is translated into sound. As a result, more
energy or vibration can be expected. Close attention to
line set isolation must be observed.
Following are some points to consider when placing and
installing a high-efficiency outdoor unit:
Placement
Be aware that some localities are adopting sound ordi-
nances based on how noisy the unit is at the neighbor’s
home, not at the original installation. Install the unit as far as
possible from the property line. When possible, do not
install the unit directly outside a bedroom window. Glass
has a very high level of sound transmission. Figure 5
shows how to place the outdoor unit and line set to reduce
line set vibration.
Line Set Isolation
Illustrations on the pages 6 and 7 demonstrate procedures
which ensure proper refrigerant line set isolation. Figure 6
shows how to install line sets on horizontal runs. Figure 7
shows how to make a transition from horizontal to vertical.
Figure 8 shows how to install line sets on vertical runs.
Brazing Connection Procedure
1. Cut ends of refrigerant lines square (free from nicks
or dents). Debur the ends. The pipe must remain
round; do not pinch end of line.
2. Before making line set connections, use dry nitrogen to
purge the refrigerant piping. This will help to prevent
oxidation and the introduction of moisture into the system.
3. Use silver alloy brazing rods (5% or 6% silver alloy for
copper-to-copper brazing or 45% silver alloy for
copper-to-brass or copper-to-steel brazing) which are
rated for use with HCFC-22 refrigerant.
4. Remove the Schrader core assemblies before brazing
to protect them from damage due to extreme heat.
Replace the cores when brazing is complete.
5. Wrap a wet cloth around the valve body and copper tube
stub to protect them from heat damage during brazing.
Wrap another wet cloth underneath the valve body to
protect the base paint.
6. Braze the line set to the service valve. Quench the joints
with water or a wet cloth to prevent heat damage to the
valve core and opening port. The tube end must stay
bottomed in the fitting during final assembly to
ensure proper seating, sealing, and rigidity.
7. Install the factory-supplied fixed orifice (or thermal
expansion valve which is sold separately and which is
approved for use with HCFC-22 refrigerant) in the
liquid line at the indoor coil.
Refrigerant Metering Device
2SHP13 units are designed for use with either fixed orifice
or TXV systems. Refer to the appropriate following section
for information on installing the chosen refrigerant meter-
ing device.
Fixed Orifice Systems
2SHP13 units are shipped with a fixed orifice refrigerant
metering device. Replace the existing indoor unit fixed
orifice with the orifice supplied with this unit. Place the
supplied fixed orifice sticker on the indoor cabinet after
installation. See Table 3 on page 7 for the proper fixed
orifice size for each unit. In nonstandard applications, the
provided fixed orifice may not be appropriately sized.
Install the fixed orifice as shown in Figure 9 on page 7. Do not
twist cap tubes when loosening the seal nut from the orifice
housing. Use wrench to back up the distributor.
Outside Unit Placement
and Installation
Figure 5
Install unit away
from windows
Two 90° elbows installed in lineset
will reduce lineset vibration

Lennox 2SHP13 Series Specifications

General

Brand	Lennox
Model	2SHP13 Series
Category	Heat Pump
Language	English