Lennox 2SHP13 Series User manual

506875-01 Page 1 of 23Issue 1139
Installation and servicing of air conditioning equipment
can be hazardous due to internal refrigerant pressure
and live electrical components. Only trained and
qualified service personnel should install or service
this equipment. Installation and service performed by
unqualified persons can result in property damage,
personal injury, or death.
WARNING
Sharp metal edges can cause injury. When installing
the unit, use care to avoid sharp edges.
WARNING
Risk of electrical shock. Disconnect all remote power
supplies before installing or servicing any portion of the
system. Failure to disconnect power supplies can result
in property damage, personal injury, or death.
WARNING
The equipment covered in this manual is to be installed by trained and experienced service and
installation technicians. Improper installation, modification, service, or use can cause electrical
shock, fire, explosion, or other conditions which may cause personal injury, death, or property
damage. Use appropriate safety gear including safety glasses and gloves when installing this
equipment.
WARNING
TABLE OF CONTENTS
INSTALLATION .....................................................2
START-UP .......................................................... 11
OPERATION ...................................................... 15
MAINTENANCE .................................................17
HOMEOWNER INFORMATION ........................ 18
WIRING DIAGRAM ............................................ 21
WARRANTY ......................................................23
These instructions must be read and understood completely before attempting installation.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
2SHP13 Series
with Dry Nitrogen Holding Charge
Split System Heat Pump
*P506875-01*
(P) 506875-01

Page 2 of 23 506875-01Issue 1139
INSTALLATION
Torque Table
Table 1
Compressor Bolts 90 in. lbs.
#10 Machine Screws 28 in. lbs.
#8 Machine Screws 16 in. lbs.
Sheet Metal Screws 16 in. lbs.
Service Port Caps 8 ft. lbs.
Stem Caps 8 ft. lbs.
Fastener Torque
Figure 1
Installation Clearances
* A service clearance of 30" must be maintained on one of the
sides adjacent to the control box. Clearance to one of the other
three sides must be 36". Clearance to one of the remaining two
sides may be 12" and the final side may be 6".
Aclearance of 24" must be maintained between units.
48" clearance required on top of unit. Maximum soffit overhang is
36".
General
This heat pump, which will also be referred to in this
instruction as the outdoor unit, uses HCFC-22
refrigerant.
This outdoor unit is intended as a replacement outdoor
component for use in residential systems which include
an existing indoor coil which is functioning properly. It is
NOT intended for new installations.
•shipped from the factory with nitrogen holding charge
that must be purged from the unit;
•designed for use with HCFC-22 refrigerant only;
•designed for use in systems that use check / thermal
expansion valve (H2TXV). See the 2SHP13 product
specification sheet for approved check / expansion
valve match ups and application information.
Important: The heat pump must have properly matched
system components including indoor unit and refrigerant
metering device. Mismatched equipment may have an
impact on the operation, performance, reliability, and
warranty of the heat pump system.
Inspection of Shipment
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Take special care to examine
the unit inside the carton if the carton is damaged. Any
concealed damage discovered should be reported to the
last carrier immediately, preferably in writing, and should
include a request for inspection by the carrier’s agent.
If any damages are discovered and reported to the carrier
DO NOT INSTALL THE UNIT, as claim may be denied.
Check the unit rating plate to confirm specifications
are as ordered.
Location of Unit
Outdoor units operate under a wide range of weather
conditions; therefore, multiple factors must be considered
when positioning the unit. The unit must be positioned to
give adequate clearances for sufficient airflow and
serviceing. Refer to Figure 1 for installation clearances.
•Place a sound-absorbing material, such as Isomode,
under the unit if it will be installed in a location or
position that will transmit sound or vibration to the
living area or adjacent buildings.
•Install the unit high enough above the ground or roof
to allow adequate drainage of defrost water and prevent
ice buildup.
•In heavy snow areas, do no locate the unit where drifting
snow will occur. The unit base should be elevated
above the depth of average snows.
NOTE: Elevation of the unit may be accomplished by
constructing a frame using suitable materials. If a support
frame is constructed, it must not block drain holes in unit
base.
•When installed in areas where low ambient
temperatures exist, locate unit so winter prevailing
winds do not blow directly into outdoor coil.

506875-01 Page 3 of 23Issue 1139
•Locate unit away from overhanging roof lines which
would allow water or ice to drop on, or in front of, coil
or into unit.
Slab Mounting
When installing a unit at grade level, install on slab high
enough above grade so that water from higher ground will
not collect around the unit (see Figure 2). Slab should
have a slope tolerance away from the building of 2° or 2"
per 5'. This will prevent ice from building up under the
unit during a defrost cycle. Refer to following roof mounting
section for barrier construction if unit must face prevailing
winter winds.
Figure 2
Slab Mounting
Discharge Air
Mounting Slab
Ground Level
Building
Structure
Roof Mounting
Install unit at a minimum of 6" above surface of the roof to
avoid ice buildup around the unit. Locate the unit above a
load bearing wall or area of the roof that can adequately
support the unit. Consult local codes for rooftop
applications.
If unit coil cannot be mounted away from prevailing winter
winds, a wind barrier should be constructed (see Figure
3). Size the barrier at least the same height and width as
the outdoor unit. Mount barrier 24" from the sides of the
unit in the direction of the prevailing winds.
Electrical Wiring
All field wiring must be done in accordance with the
National Electrical Code (NEC) recommendations,
Canadian Electrical Code (CEC) and CSA Standards, or
local codes, where applicable.
Unit must be grounded in accordance with national
and local codes. Failure to ground unit properly can
result in personal injury or death.
WARNING
Line voltage is present at all components when unit is
not in operation on units with single pole contractors.
Disconnect all remote electric power supplies before
opening access panel. Unit may have multiple power
supplies. Failure to disconnect all power supplies could
result in personal injury or death.
WARNING
Figure 3
Wind Barrier Construction
Refer to the furnace or blower coil Installation Instructions
for additional wiring application diagrams and refer to unit
rating plate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch. Any excess high voltage
field wiring should be trimmed or secured away from
the low voltage field wiring.
2. Ground unit at unit disconnect switch or to an earth
ground. To facilitate conduit, a hole is in the bottom
of the control box. Connect conduit to the control box
using a proper conduit fitting. Units are approved for
use only with copper conductors. 24V Class II circuit
connections are made in the low voltage junction box.
A complete unit wiring diagram is located inside the
unit control box cover (see also pages 20 and 21 of
this instruction).

Page 4 of 23 506875-01Issue 1139
Thermostat Designations
(Some connections may not apply. Refer to
specific thermostat and indoor unit.)
Without Auxiliary Heat
With Auxiliary Heat
Do not connect C (common) connection between indoor unit and
thermostat except when required by the indoor thermostat. Refer
to thermostat installation instructions. C (common) connection
between indoor unit and outdoor unit required for proper operation.
Figure 4
3. Install room thermostat on an inside wall that is not
subject to drafts, direct sunshine, or other heat
sources.
4. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit (see Figure 4).
5. Do not bundle any excess 24V control wire inside
control box. Run control wire through installed wire
tie and tighten wire tie to provide low voltage strain
relief and to maintain separation of field-installed low
and high voltage circuits.
Refrigerant Piping
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (sweat connections) to the indoor
coil (flare or sweat connections).
Select line set diameters from Table 2 to ensure that oil
returns to the compressor. Size vertical suction riser to
maintain minimum velocity at minimum capacity.
Recommended line length is 50' or less. If more than 50'
line set is required, contact Technical Services at (800)
515-3501. Table 2 shows the diameters for line sets up
to 100' although vertical lift applications and trapping
requirements need to be reviewed with Technical Services
for line sets over 50'.
Refrigerant Line Set Diameters (in.)
For installations eceeding 50’, contact Technical
Services at [phone].
Table 2

506875-01 Page 5 of 23Issue 1139
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
ordinances 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.
Figure 5
Outside Unit Placement and Installation
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 metering
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 distributor cap tubes when loosening the
seal nut from the orifice housing. Use wrench to back up
the distributor.

Page 6 of 23 506875-01Issue 1139
Figure 7
Refrigerant Line Sets: Transition from Vertical to Horizontal
Anchored
Heavy Nylon
Wire Tie
Wall
Stud
Metal Sleeve Vapor Line Wrapped
in Armaflex
–
Liquid Line
Wall
Stud
Automotive
Muffler-Type
Hanger
Strap Liquid
Line to Vapor
Line
Metal Sleeve
Vapor Line Wrapped
in Armaflex
–
Liquid Line
Strap Liquid
Line to Vapor
Line
Figure 6
Refrigerant Line Sets: Installing Horizontal Runs
To hang line set from joist or rafter,
use either metal strapping material
or anchored heavy nylon wire ties.
Strapping Material
(around vapor line only)
8’
8’
Tape or Wire Tie
Strap the vapor line to the joist or rafter
at 8 intervals then strap the liquid line
to the vapor line.
’
Floor Joist or
Roof Rafter
Metal Sleeve
Floor Joist or Roof Rafter
Tape or Wire Tie
Wire Tie
(around vapor line only)

506875-01 Page 7 of 23Issue 1139
Figure 8
Refrigerant Line Sets: Installing Vertical Runs (new construction shown)
Outside Wall
Wood Block
Between Studs
IMPORTANT: Refrigerant
lines must not contact wall.
Vapor Line Liquid Line
Wire Tie
Inside Wall
Strap
Sleeve
Wire Tie
Wire Tie
Strap
Wood Block
Sleeve
Vapor Line Wrapped
with Armaflex
Liquid Line
Caulk
PVC Pipe Fiberglass
Insulation
Outside Wall
IMPORTANT:
Refrigerant
lines must not
contact structure.
NOTE: Similar installation practices
should be used if line set is to be
installed on exterior of outside wall.
Metering Device Installation
Figure 9
If necessary, remove R22 flow control device (fixed
orifice/thermal expansion valve) from existing line
set before installing R-410A approved orifice or
expansion valve.
Fixed Orifice Data
Table 3

Page 8 of 23 506875-01Issue 1139
Expansion Valve Systems
Expansion valves equipped with Chatleff-type fittings are
available from the manufacturer. See Table 4 for proper
TXV for each unit.
To install an expansion valve (see Figure 9 on page 7):
1. Separate the distributor assembly and remove the
piston orifice and used teflon seal. Insert nozzle end
of the expansion valve along with a new teflon seal
into the distributor and tighten to 20 – 30 ft. lbs. Use
backup wrench on all wrench flats. Overtightening
will crush the teflon seal and may cause a leak.
2. Attach liquid line portion of distributor assembly along
with new teflon seal to the inlet of the expansion valve.
Tighten to 20 – 30 ft. lbs. Use backup wrench on all
wrench flats. Overtightening will crush the teflon
seal and may cause a leak.
3. Connect the external equalizer line to the equalizer
port on the suction line and tighten to 8 ft. lbs.
4. Strap the superheat sensing bulb to the suction
header. If installing an expansion valve on an indoor
coil that previously used a fixed orifice, be sure to
remove the existing fixed orifice. Failure to remove a
fixed orifice when installing an expansion valve to the
indoor coil will result in improper operation and damage
to the system.
Manifold Gauge Set
When checking the unit charge, use a manifold gauge
set that is equipped with “low loss” hoses. Do not use a
manifold gauge set with anything other than a “low loss”
hose
.
Liquid and Suction Line Service Valves
The liquid line and suction line service valves (see Figure
10) and service ports are used for leak testing, evacuating,
charging, and checking charge.
Each valve is equipped with a service port which has a
factory-installed Schrader valve. Aservice port cap
protects the Schrader valve from contamination and serves
as the primary leak seal.
To Access the Schrader Port:
1. Remove the service port cap with an adjustable
wrench.
2. Connect gauge to the service port.
3. When testing is completed, replace service port cap.
Tighten finger tight, then an additional 1/6 turn.
To Open Liquid or Suction Line Service Valve:
1. Remove stem cap with an adjustable wrench.
2. Use a service wrench with a hex-head extension to
back the stem out counterclockwise as far as it will
go. Use a 3/16" hex head extension for liquid line
service valves and a 5/16" extension for suction line
service valves.
3. Replace the stem cap. Tighten finger tight, then
tighten an additional 1/6 turn.
Table 4
TXV Data
Figure 10
Service Valve

506875-01 Page 9 of 23Issue 1139
To Close Liquid or Suction Line Service Valve:
1. Remove the stem cap with an adjustable wrench.
2. Use a service wrench with a hex-head extension to
turn the stem clockwise to seat the valve. Tighten
firmly.
3. Replace the stem cap. Tighten finger tight, then
tighten an additional 1/6 turn.
Suction Line (Ball Type) Service Valve
Suction line (ball type) service valves function the same
way as the other valves; the difference is in the
construction (see Figure 11).
The ball valve is equipped with a service port with a factory-
installed Schrader valve. Aservice port cap protects the
Schrader valve from contamination and serves as the
primary seal.
Ball Type Service Valve
(Valve Open)
Figure 11
Use adjustable wrench. To open, rotate stem counter-
clockwise 1/4 turn (90°). To close, rotate stem clockwise 1/
4 turn (90°).
Leak Testing
After the line set has been connected to the indoor and
outdoor units, the line set connections and indoor unit
must be checked for leaks.
Using an Electronic Leak Detector
1. Connect the high pressure hose of the manifold gauge
set to the suction valve service port. (Normally the
high pressure hose is connected to the liquid line port;
however, connecting it to the suction ports helps to
protect the manifold gauge set from damage caused
by high pressure.)
2. With both manifold valves closed, connect the cylinder
of HCFC-22 refrigerant. Open the valve on the HCFC-
22 cylinder (vapor only).
3. Open the high pressure side of the manifold to allow
HCFC-22 into the line set and indoor unit. Weigh in a
trace amount of HCFC-22. (A trace amount is a
maximum of 2 oz. of refrigerant or 3 lbs. pressure.)
Close the valve on the HCFC-22 cylinder and the valve
on the high pressure side of the manifold gauge set.
Disconnect the HCFC-22 cylinder.
4. Connect a cylinder of nitrogen with a pressure
regulating valve to the center port of the manifold gauge
set. When using high pressure gas such as
nitrogen for this purpose, be sure to use a
regulator that can control the pressure down to 1
or 2 psig.
5. Adjust nitrogen pressure to 150 psig. Open the valve
on the high side of the manifold gauge set to pressurize
the line set and the indoor coil.
Evacuation
Evacuating the system of noncondensables is critical for
proper operation of the unit. Noncondensables are defined
WARNING
Refrigerant can be harmful if inhaled. Refrigerant must
always be used and recovered responsibly. Incorrect
or irresponsible use of refrigerant can result in personal
injury or death.
WARNING
Never use oxygen to pressurize refrigeration or air
conditioning systems. Oxygen will explode on
contact with oil and could cause personal injury or
death.

Page 10 of 23 506875-01Issue 1139
as any gas that will not condense under temperatures
and pressures present during operation of an air
conditioning system. Noncondensables and water vapor
combine with refrigerant to produce substances that
corrode copper piping and compressor parts.
WARNING
Do not use a compressor to evacuate a system. Avoid
deep vacuum operation. Extremely low vacuums can
cause internal arcing and compressor failure. Danger
of equipment damage. Damage caused by deep
vacuum operation will void warranty.
Use a thermocouple or thermistor electronic vacuum gauge
that is calibrated in microns. Use an instrument that reads
down to 50 microns.
1. Open liquid and suction line service valves on outdoor
unit.
2. Connect the manifold gauge set to the service valve
ports as follows:
•Low pressure gauge to suction line service valve
•High pressure gauge to liquid line service valve
3. Connect micron gauge.
4. Connect the vacuum pump (with vacuum gauge) to
the center port of the manifold gauge set.
5. Open both manifold valves and start vacuum pump.
6. Evacuate the system to a minimum of 500 microns
or lower. During the early stages of evacuation, it is
desirable to close the manifold gauge valve at least
once to determine if there is a rapid rise in pressure.
A rapid rise in pressure indicates a relatively large
leak. If this occurs, the leak testing procedure must
be repeated.
7. When 500 microns or lower is maintained, close the
manifold gauge valves, turn off the vacuum pump, and
disconnect the manifold gauge center port hose from
the vacuum pump. Attach the manifold gauge center
port hose to a nitrogen cylinder with pressure regulator
set to 150 psig and purge the hose. Open the manifold
gauge valves to break the vacuum in the system.
Close the manifold gauge valves.
8. Shut off the nitrogen cylinder and remove the manifold
gauge hose from the cylinder. Open the manifold
gauge valves to release the nitrogen from the system.
9. Reconnect the manifold gauge to the vacuum pump,
turn the pump on, and continue to evacuate the system
until 500 microns is maintained
9. Reconnect the manifold gauge to the vacuum pump,
turn the pump on, and continue to evacuate the system
until 500 microns is maintained within a 20-minute
period after shutting off the vacuum pump and closing
the manifold gauge valves.
10. When the requirements above have been met,
disconnect the manifold hose from the vacuum pump.