Electrical Connections - Lennox T?Class TSA*S4 Units Installation Instructions Manual

Electrical
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).
Refer to the furnace or air handler installation instructions
SIZE CIRCUIT AND INSTALL DISCONNECT SWITCH
Refer to the unit nameplate for minimum circuit ampacity, and maximum
fuse or circuit breaker (HACR per NEC). Install power wiring and properly
sized disconnect switch.
SERVICE
DISCONNECT
SWITCH
NOTE Units are approved for use only with copper conductors.
Ground unit at disconnect switch or to an earth ground.
WARNING
Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and
local codes.
Line voltage is present at all components when unit is not in operation on units with single-pole contactors.
Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power
supplies.
506663−01 11/10
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
24VAC TRANSFORMER
Use the transformer provided with the furnace or air
handler for low-voltage control power (24VAC − 40 VA
minimum)
INSTALL THERMOSTAT
Install room thermostat (ordered separately) on an inside wall
approximately in the center of the conditioned area and 5 feet (1.5m) from
the floor. It should not be installed on an outside wall or where it can be
MAIN FUSE BOX/
affected by sunlight or drafts.
BREAKER PANEL
THERMOSTAT
NOTE
panel.
Page 16
5 FEET
(1.5M)
24VAC, Class II circuit connections are made in the control