508133-01 Page 1 of 25Issue 2140
INSTALLATION INSTRUCTIONS
4HP18V Units
(R410A Refrigerant)
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
(P) 508133-01
*P508133-01*
Table of Contents
Application ...................................................................1
General ........................................................................2
Installation ...................................................................2
Refrigerant Piping ........................................................4
Electrical - Circuit Sizing and Wire Routing ...............13
Thermostat Control and Low Voltage Control Wiring 13
Outdoor Unitary Control.............................................17
Unit Operation ...........................................................19
Start-Up .....................................................................20
Maintenance ..............................................................22
Homeowner Information ............................................22
Start-Up and Performance Checklist .........................25
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
qualied service personnel should install or service
this equipment. Installation and service performed by
unqualied 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
Application
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
Certied Products. Refer to http://www.ahridirectory.org.
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.
IMPORTANT
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