1
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507644-03 10/2021
Supersedes 507644-02
This manual must be left with the
owner for future reference.
M0STAT64Q-2 Indoor Unit
Programmable Controller
(22U20)
©2021 Lennox Industries Inc.
Dallas, Texas, USA
IMPORTANT
Frequent changes to operating mode may
cause system malfunction. Allow at least
one minute between mode changes to
allow the system to stabilize.
WARNING
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal injury or
loss of life.
Installation and service must be performed
by a licensed professional HVAC installer
(or equivalent) or service agency.
Shipping and Packing List
Package 1 of 1 catalog number 22U20 contains:
1 – Wired Controller
1 – Lithium battery
3 – Screws (mount to wall)
2 – Screws (mount to J-box)
2 – Plastic spacers (J-box)
1 – Connection Cable A with connector for all indoor
units
1 – Connection Cable B with connector for MMDA/B,
MCFA/B, M22A and M33A/B/C indoor units
1 – Connection Cable C with connector for MWMA/B
indoor units
1 – Connection Cable D for MWMC indoor unit
1 – Installation and operation manual
Specications
Input voltage 5 VDC
Ambient temperature 23~110°F (-5~43°C)
Ambient humidity RH40%~RH90%
To Next Page
Need help?
General
