Comfort-Aire HBH Series 6-10 Tons - Manual (Page 9)

Heat Controller, Inc. HBH SERIES IOM Manual
8
Field Conversion of Air Discharge
Step 1
Step 2
Step 3
Step 4
Move motor clips to
other side on bracket
Remove motor
and blower sheave
Loosen 2 motor slide nuts, raise
slide assembly, remove belt.
Remove blower panel
and access panel
Remove (3x) per slide
1/4-20 UNC bolts
Return air
Step 5
Step 6
Rotate entire blower housing ASM to rest at back end of the unit. Locate
housing holes and bolt down using previous 1/4-20 UNC bolts (3x) ea. side.
Motor motor, motor sheave,
blower sheave and belt
Step 7
Step 8
Put blower panel
and access panel back on
Front
Return air
Front
Return air
Adjusting bolt - used
to raise or lower motor
slide assembly.
Remove 4
motor bolts
Step 1
Step 2
Step 3
Step 4
Move motor clips to
other side on bracket
Remove motor
and blower sheave
Loosen 2 motor slide nuts, raise
slide assembly, remove belt.
Remove blower panel
and access panel
Remove (3x) per slide
1/4-20 UNC bolts
Return air
Step 5
Step 6
Rotate entire blower housing ASM to rest at back end of the unit. Locate
housing holes and bolt down using previous 1/4-20 UNC bolts (3x) ea. side.
Motor motor, motor sheave,
blower sheave and belt
Step 7
Step 8
Put blower panel
and access panel back on
Front
Return air
Front
Return air
Adjusting bolt - used
to raise or lower motor
slide assembly.
Remove 4
motor bolts
Figure 4: Left Return Side Discharge to Back
Figure 4 Continued on Following Page
Step 1
Step 2
Step 3
Step 4
Move motor clips to
other side on bracket
Remove motor
and blower sheave
Loosen 2 motor slide nuts, raise
slide assembly, remove belt.
Remove blower panel
and access panel
Remove (3x) per slide
1/4-20 UNC bolts
Return air
Step 5
Step 6
Rotate entire blower housing ASM to rest at back end of the unit. Locate
housing holes and bolt down using previous 1/4-20 UNC bolts (3x) ea. side.
Motor motor, motor sheave,
blower sheave and belt
Step 7
Step 8
Put blower panel
and access panel back on
Front
Return air
Front
Return air
Adjusting bolt - used
to raise or lower motor
slide assembly.
Remove 4
motor bolts
� WARNING! �
WARNING! To avoid possible injury or death due to
electrical shock, open the power supply disconnect switch
and secure it in an open position during installation or
conversion.
WARNING!
! !
Overview - Horizontal units can be field converted
between straight (side) and back (end) discharge using
the instructions below.
Note: It is not possible to field convert return air between left
or right return models due to the necessity of refrigeration
copper piping changes.
Preparation - Field conversion must be completed on
the ground. If the unit is already hung it should be taken
down for the field conversion. Place in a well-lighted area.
Conversion should only be attempted by a qualified service
technician.
Side to Back Discharge Conversion
1. Remove back panel and side access panel
2. Loosen 2 motor slide nuts, raise motor slide
assembly and remove belt and motor sheave.
3. Remove blower sheave. Remove motor bolts and
carefully remove motor.
4. Remove 2 motor clips and reattach to opposite side.
5. Unbolt (3 per side) complete housing assembly.
6. Rotate complete assembly into new position. Locate
over mounting holes in base, reattach using 3 bolts
per side.
7. Mount motor, motor sheave, blower sheave and
belt. Make sure wires are not pinched and not over
sharp edges. Adjust motor downward to tighten belt.
Raise or lower motor slide assembly with adjusting
bolt and retighten 2 slide nuts. Check for correct
tension (See Tensioning V-Belt Drives page). Rewire
motor (at contactor) for correct rotation. Spin blower
wheel to insure wheel is not obstructed.
8. Replace 2 panels.
Back to Side Discharge Conversion - If the discharge is
changed from back to side, use above instruction noting that
illustrations will be reversed.
Left vs. Right Return - It is not possible to field convert
return air between left or right return models due to the
necessity of refrigeration copper piping changes. However,
the conversion process of side to back or back to side
discharge for either right or left return configuration is the
same. In some cases, it may be possible to rotate the entire
unit 180 degrees if the return air connection needs to be on
the opposite side. Note that rotating the unit will move the
piping to the other end of the unit.