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©2023 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION INSTRUCTIONS FOR COMBINATION TEMPERATURE / HUMIDITY (RH)
SENSOR KIT (21W06 AND 101046) USED WITH LG/LC/SG/SC UNITS
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
CAUTION
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
Electrostatic discharge can affect electronic
components. Take precautions during unit
installation and service to protect the unit's
electronic controls. Precautions will help
to avoid control exposure to electrostatic
discharge by putting theunit, the control
and the technician at the same electrostatic
potential.
Neutralize electrostatic charge by touching
hand and all tools on an unpainted unit
surface before performing any service
procedure.
Shipping and Packing List
1 - Sensor (A37)
2 - Screws
Cable Applications
Wire runs of 50' (15m) or less:
Use three separate shielded cables containing 20AWG
minimum, twisted pair conductors with overall shield (Belden
type 8762 or 88760 [plenum] or equivalent). Connect cable
shield drain wires as shown in Figure 1.
CONTROLS
KITS AND ACCESSORIES
505196M
11/2023
Supersedes 03/2023
Wire runs of 150' (46m) or less:
Use three separate shielded cables containing 18AWG
minimum, twisted pair conductors with overall shield (Belden
type 8762 or 88760 [plenum] or equivalent). Connect cable
shield drain wires as shown in Figure 1.
COMBINATION TEMPERATURE /
HUMIDITY (RH) SENSOR KIT
Figure 1. Field Wiring
[150 ft. (46m) or Shorter Runs]
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Summary of Contents for Lennox 21W06
- Page 1 HUMIDITY (RH) SENSOR KIT Dallas, Texas, USA Supersedes 03/2023 INSTALLATION INSTRUCTIONS FOR COMBINATION TEMPERATURE / HUMIDITY (RH) SENSOR KIT (21W06 AND 101046) USED WITH LG/LC/SG/SC UNITS Wire runs of 150’ (46m) or less: WARNING Use three separate shielded cables containing 18AWG...
- Page 2 Wire runs over 150 feet (46m): Use a local, isolated 24VAC transformer such as Lennox cat #18M13 (20VA minimum) to supply power to sensor as shown in figure 2. Use three shielded cables containing 20AWG minimum, twisted pair conductors with overall shield [Belden type 8762 or 88760 (plenum) or equivalent].
- Page 3 (A55), or by measuring the sensor output voltage Relative The current ZAT reading (when enabled) displays on the humidity should correspond to the sensor (A37) output system overview screen of the Lennox CORE Service App. ® voltage listed in table 1. For example: if indoor air relative...
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