Lennox CBX25UH Series Installation And Service Procedure page 8

7. The air handler access panels have knockouts over the
circuit breaker opening. Knock out both plates to
accommodate the circuit breaker levers. If installing a
heat element assembly with circuit breakers, remove
the knockouts but do not install the access panel until
all electrical connections have been completed.
IMPORTANT - To remove knockouts, knock them out in the
same direction the punch did. Always start with the smallest
knockout and work outward to the knockout for the
appropriately-sized hole.
WARNING
Foil face insulation must be cut to eliminate the possibility
for any frayed foil to coming in contact with any main or
low voltage connections. Insulation must be kept a
minimum of 1/2" away from any electrical connection.
CHANGING CIRCUIT BREAKER ORIENTATION
The air handler comes from the factory setup for horizontal
left-hand discharge which will require no change in the
circuit breaker orientation. However, if the air handler is
installed in a horizontal right-hand discharge position, the
breaker will need to be rotated 180º so that the UP position
of the breaker is the ON position. The circuit breaker
orientation change is required by UL 1995, Article 26.18 (25
September 2005).
1. The factory default configuration for the two circuit
breakers is horizontal left-hand discharge which will
UPFLOW AND HORIZONTAL
LEFT (FACTORY DEFAULT)
2. Locate the one clip which is located on the right side
Figure 9. Circuit Breaker Orientation
Page 8
require no change (see figure 9). To change the
applicable circuit breakers orientation for right-hand
discharge, proceed to step 2.
(see arrow) of each breaker (see figure 8). The clip
secures the circuit breaker to the mounting bracket.
Pull the clip to release the breaker from the mounting
bracket.
NOTE - There may be only one clip securing
each circuit breaker.
CIRCUIT
BREAKER
Figure 8. Circuit Breaker Clip
HORIZONTAL RIGHT
BREAKER(S)
MOUNTING
BRACKET
CLIP