507563-01
Page 1 of 19
Issue 1946
Save these instructions for future reference
INSTALLATION INSTRUCTIONS
4SHP20LX UNITS
(R410A Refrigerant)
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
(P) 507563-01
*P507563-01*
These units are designed for use in residential and light
commercial type buildings. Units should be installed with
approved indoor matches listed in the Air-Conditioning,
Heating and Refrigeration Institute (AHRI) Directory of
Certified Products. Refer to http://www.ahridirectory.org.
Before installation, inspect the unit for shipping damage.
This unit is a variable speed system and can only be
installed with “Comfort Sync” Wi-Fi thermostat and
“Comfort Sync” enabled air handler or furnace.
Table of Contents
General ........................................................................1
Installation ...................................................................2
Refrigerant Piping ........................................................4
Electrical Wiring .........................................................12
Start-Up .....................................................................15
Maintenance ..............................................................16
Homeowner Information ............................................16
This manual must be left with the homeowner for future reference.
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
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
ELECTRICAL SHOCK HAZARD!
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
General
Read this entire instruction manual, as well as the
instructions supplied in separate equipment, before
starting the installation. Observe and follow all warnings,
cautions, instructional labels, and tags. Failure to comply
with these instructions could result in an unsafe condition
and/or premature component failure.
