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Lennox International Inc
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Household Appliance
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Heat Pump
Lennox International Inc
4HP18LT manual
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Contents
Main
INSTALLATION AND MAINTENANCE INSTRUCTIONS
4HP18LT Series
Split System Heat Pump
WARNING
INST ALLA TION
36 * 36 *
Fastener Torque
Stem Caps 8 ft. lbs.
Service Port Caps 8 ft. lbs.
Page
Page
1/2
36,000 3/8 3/8 3/8 1/2
1/2
48,000 60,000 1/2
Install unit away from windows
CAUTION
Refrigerant Line Sets: Transition from Vertical to Horizontal
Refrigeraant Line Sets: Installing Vertical Runs (new construction shown)
Flushing Connections
TXV Data
MODEL PART NUMBER 4HP18LT- 24 4HP18LT - 36
H4TXV01 H4TXV02 4HP18LT - 48, -60 H4TXV03
Page
WARNING WARNING
WARNING
Page
START-UP
CAUTION
IMPORTANT
Page
=
_
Page
OPERATION
Flash Codes
Flash Codes (cont.)
Miswired Module Troubleshooting
MAINTENANCE
WARNING
HOMEOWNER INFORMATION
WARNING
Page
Start-Up and Performance Checklist
506470-01 Issue 1007 Page 27
Wire Diagram
S6
K1
SR
CONTACTOR