OM-APEX E V1.06
November 19, 2012
Page 14
APEX CBT
INSTALLATION INSTRUCTIONS cont.
MOVE BYPASS HANDLE SYSTEM FROM LEFT TO RIGHT SIDE FURNACE
In some installations it is necessary to move the bypass handle system from the left (default) to the right side of
the furnace. Th
is is possible by unbolting the system on the left and reinstalling on the right (Th
e round plate on
the right makes place for the bypass handle but need to be installed on the left aft er the change-over). Make sure
to adjust the handle position and latch so proper seal is achieved on bypass door. Reroute wiring. Fig. 7 shows
the correct mounting of the handle latches when moved to right side.
PRESSURE LOSS
Before any changes are made to the existing furnace system you must establish the working parameters of that
system. You can then insure that addition of the add-on has not degraded the operation of the original system,
and correct air fl ow will be maintained. Change all fi lters in the system to insure maximum free air fl ow. Using
an accurate manometer check the static pressure at the end of a typical duct near the exit to the house. Check the
static pressure in the plenum above the existing furnace also.
Pressure drop = Static pressure at furnace -(minus) static pressure at duct exit
Record the pressure drop of the original system.
Addition of the add-on furnace will add airfl ow resistance in the system. Aft er installation is complete measure
the pressure drop in the same run measured before add-on installation. If the air fl ow has diminished the blower
speed should be adjusted to compensate. When using a belted blower the pulley size should be changed or
adjusted to speed up the blower. If the pulley size is adjusted measure the blower motor current to insure that
it is still within the motor plate specifi cation. It may be necessary to replace the motor with a more powerful
motor. If a direct drive blower is used change to a higher motor speed. Do not change the blower size.
Fig. 7
Fig. 6
Summary of Contents for APEX CBT
Page 5: ...OM APEX E V1 06 November 19 2012 Page 5 APEX CBT APPLIANCE DIMENSIONS ...
Page 7: ...OM APEX E V1 06 November 19 2012 Page 7 APEX CBT CERTIFICATION LABEL ...
Page 33: ...OM APEX E V1 06 November 19 2012 Page 33 APEX CBT BRICK LAYOUT ...
Page 40: ...OM APEX E V1 06 November 19 2012 Page 40 APEX CBT NOTES ...
