Lennox 508172-01 Thermistor Replacement Kit Instruction Manual

508172-01 Thermistor Replacement Kit
Instruction Manual

508172-01 Thermistor Replacement Kit

INSTALLATION INSTRUCTIONS FOR THERMISTOR KITS USED ON LGM/LCM036-300 PACKAGED UNITS

Shipping and Packing List
Package 1 of 1 contains:
4- Thermistors with wire harnesses

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

CAUTION

As with any mechanical equipment, contact with sharp sheet metal edges can result in a personal in­ jury. Take care while handling this equipment and wear gloves and protective clothing.
Check the packaging for shipping damage. Contact the last carrier immediately if any shipping damage is found.

Application

Units are equipped with factory-installed thermistors located at different points on the refrigerant circuit. The thermistors provide the Unit Controller with constant temperature readings. These temperatures are used as feedback in certain modes of unit operation. In addition, the Unit Controller uses these temperatures to initiate alarms such as loss of condenser or evaporator airflow and loss of charge.
Each thermistor must be specifically placed for proper unit operation and to initiate valid alarms. See tables 1 through 6 for proper locations and kit application.
Note – Four thermistors are provided in each kit but not all thermistors are used in each application.

TABLE 1
036, 048

TABLE 2
060, 074

TABLE 3
092, 102, 120, 150

TABLE 4
156, 180

TABLE 5
210

TABLE 6
240, 300

PACKAGED UNITS KITS
508172-01
4/2022
Supersedes 5/2021
©2022