Lennox XC15 Series Installation Instructions Manual page 5

Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch. See figure 6.
Typical Field Wiring Diagram
GND
L1
L2
208−230/60/1
READ
WARNING AND
NOTE
WARNING! − ELECTRIC SHOCK HAZARD. Can cause INJURY
or DEATH. Unit must be grounded in accordance with national
and local codes.
NOTE − For use with copper conductors only. Refer to unit rating
plate for minimum circuit ampacity and maximum over-current
protection size.
Figure 6
2. Ground unit at unit disconnect switch or to earth
ground.
3. Connect conduit to the unit via the bottom hole using
a proper conduit fitting.
NOTE − Units are approved for use only with copper
conductors. 24V, Class II circuit connections are
made in the low voltage junction box. Refer to figure 7
for field wiring diagram. A complete unit wiring dia-
gram is located on the back side of the access panel.
NOTE − For proper voltages, select thermostat wire
gauge per the following chart:
Wire run length
less than 100' (30m)
more than 100' (30m)
4. Install room thermostat (ordered separately) on an in-
side wall approximately in the center of the conditioned
area and 5 feet (1.5 m) from the floor. It should not be
installed on an outside wall or where it can be affected
by sunlight, drafts or vibrations.
5. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit. See figure 7.
6. LSOM L Terminal Wiring Connect L terminal of the
room thermostat to the L (Brown) field wire connec-
tion.
7. LSOM Installation Verification
dures are described in System Operation under Sys-
tem Operation Monitor (see Page 16).
NOTE − Wiring the module incorrectly will cause false
LED codes. Table 8 (see page 17) describes LED op-
eration when the module is incorrectly wired and the
action required to correct the problem.
Typical Wiring Diagram
Figure 7
Page 5
AWG # Insulation type
18
color coded, temperature color−coded, temperature
º º
rating 35 C minimum
16
Verification proce-
XC15 SERIES