2022
WARNING
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector mainte
nance), disable power to blower, remove fan belt where
applicable, and ensure all controllers and thermostats are
set to the “OFF” position before
performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools, etc.,
away from moving part
s.
Table Of Contents
Dimensions Page 2.................................
Parts Arrangements Page 3.........................
Shipping and Packing List Page 4....................
General Page 4....................................
Safety Page 4.....................................
Unit Support Page 5................................
Duct Connection Page 6............................
Rigging Unit For Lifting Page 6.......................
Condensate Drains Page 6..........................
Gas Piping Page 8.................................
Pressure Test Gas Piping Page 9.....................
High Altitude Derate Page 10.........................
Download Mobile Service App Page 10.................
Electrical Connections - Power Supply Page 10.........
Electrical Connections - Control Wiring Page 11.........
Blower Operation and Adjustments Page 13............
Direct Drive Start-Up Page 15.........................
Cooling Start-Up Page 18............................
INSTALLATION
INSTRUCTIONS
LGT/LCT092H
LGT/LCT102H
LGT/LCT120H
LGT/LCT150H
(7.5 Ton)
(8.5 Ton)
(10 Ton)
(12.5 Ton)
PACKAGED UNITS
508287-01
10/2022
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier.
Prognostic & Diagnostic Sensors Page 24..............
Gas Heat Start-Up Page 26...........................
Heating Operation and Adjustments Page 27............
Electric Heat Start-Up Page 27........................
Cooling Operation Page 28...........................
Modulating Hot Gas Reheat Page 29...................
Service Page 31....................................
Field-Installed Accessories Page 37...................
Unit Controller Parameter Settings Page 37.............
Use this QR code to download the mobile service app. Follow the prompts
to pair the app with the unit control system and configure the unit. Refer to the
“Download Mobile App” section in this manual and the Setup Guide provided
with this unit. The QR code is also available in the unit control area.
The app can be downloaded from the appropriate iOS or Android store.
Look for the following icon.
Attention!
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