12
• The additional transformer might be a secondary
transformer or a wall plug (
Table 4. 24VAC Transformers
Cat#
Size
Description
10P17
40VA
120/208/240VAC, 24 VAC
10P87
50VA
12P61
75VA
18M13
40VA
Plug-in Wall Transformer
120 VAC, 24 VAC
Lennox
Smart Air Quality
Monitor
R
C
DUCT
120/240 VAC
CONTINUOUS POWERED
24VAC TRANSFORMER
(FIELD-PROVIDED)
Lennox
Smart Air Quality
Monitor
R
C
DUCT
CONTINUOUS POWERED
24VAC WALL TRANSFORMER
ADAPTER
(FIELD-PROVIDED)
Lennox Cat#
18M13
Figure 3. Separate or Plug-in Transformers
Using Indoor Unit 24VAC Transformer
Use the provided three wire split connectors to
power the SAQM from the thermostat power
connections.
Lennox Communicating
Indoor Unit
Lennox S40 Smart
Thermostat
C
i+
i-
R
Lennox
Smart Air Quality
Monitor
R
C
DUCT
Three-wire
Splice Connector
Three-wire
Splice Connector
NOTE: The terminal marked DUCT is not used at this time
Figure 4. Using Indoor Unit Power and Connecting
at Thermostat