User Guide

Lennox
®
S30 Installer Quick Start Guide
508294-01 July 2022
Scan QR Code for S30
Installation and Setup Guide
Step 1
Mounting the Smart Hub
Mount the smart hub to a vertical surface such
as a wall stud or roof truss web, or to a
horizontal surface such as a floor or ceiling
joist, or a roof rafter.
NOTE: To ensure reliable connectivity, do not
mount to a metal surface, air handler, furnace
or ductwork.
1/4”
A
B
D
KEYHOLE
THROUGH-HOLE
C
Terminals
(screw type)
+
-
COMMBUS
A B
R i+ I- C
ACC1 ACC2
+
-
COMMBUS
A B
R i+ I- C
ACC1 ACC2
Step 2
A. Use sub-base as a template to mark the desired
mounting hole locations on the wall.
B. Pull about three inches (75mm) of thermostat wire
through the opening and remove the outer thermostat
wire jacket.
Step 3
Running Wire and Mounting Sub-base
Making Wiring Connections and Attaching Thermostat
NOTE: For detailed wiring on different equipment
configurations, please reference the S30
Installation and Setup Guide. Shielded wiring
is highly recommended for all communication
connections.
Indoor Unit Controller
Outdoor Unit
Smart Hub
R i+ I- C
ACC1 ACC2
18 or 22AWG
shielded
18AWG
unshielded
18 or 22AWG
shielded
18 or 22AWG
shielded
18AWG
unshielded
-12V+12V A B
HD Display
Sub-base
+
-
COMMBUS
A B
18 AWG
unshielded
Shielded wire needs to be
connected to a common (C)
terminal.
Install HD display with UP arrow pointing
up when attaching to sub-base.
HD display sub-base
(REAR VIEW)
Install sub-base with arrow
pointing up.
Seal wire hole in wall to prevent
cold or hot air from affecting the internal
temperature sensor of the HD display.
Make connections to smart hub screw
terminals using wiring diagram in step 3.
Use smart hub as template to mark required
mounting holes on vertical surface.
Secure smart hub to
wall with
field-provided
fasteners.
Front
Back
Strip 1/4” insulation
back from end of
each control wire.
HD Display Sub-base
(FRONT INTERIOR VIEW)
IMPORTANT
Use 1-pair, 18AWG unshielded thermostat cable (field-provided) for power terminals
(R, C, 12+ and 12-). We highly recommend using 18 - 22AWG shielded thermostat cable
for communications terminals (I+, I-, A and B) which will help eliminate any noise interference.
Be careful not to bend the four connection pins protruding from the back side of the HD
display. DO NOT lay display down on side with pins. Damaged pins could cause power and
communication issues between the HD display and smart hub.
IMPORTANT
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 a service agency.
WARNING
C
Do not overtighten lower
mounting screw, doing so
may damage smart hub.
WARNING
C
Cut shield (drain) wire off
at this end
Cut shield
(drain) wire
off at this end
Cut shield (drain) wire
off at this end
Shield (drain) wire MUST
be connected to indoor unit
common terminal.