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A. Belt Drive Motors
Fan motor pulleys are factory set for speed shown in Tables
1a and 1b.
NOTE: Before adjusting fan speed, make sure the new fan
speed will provide an air temperature rise range as shown in
Tables 1a and 1b.
To change fan speed:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting nuts. See
Fig. 32.
3. Loosen movable pulley flange setscrew (see Fig. 33).
4. Screw movable flange toward fixed flange to increase speed
and away from fixed flange to decrease speed. Increas-
ing fan speed increases load on motor. Do not exceed maxi-
mum speed specified in Tables 1a and 1b.
5. Set movable flange at nearest keyway of pulley hub and
tighten setscrew. (See Tables 1a and 1b for speed change
for each full turn of pulley flange.)
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from
mounting.
To adjust belt tension:
1. Loosen fan motor mounting nuts.
2. Slide mounting plate away from fan scroll for proper belt
tension (13 mm [
1
⁄
-in.] deflection with one finger) and
2
tighten mounting nuts.
3. Adjust bolt and nut on motor to secure motor in fixed
position.
B. Ventilation (Continuous Fan)
Set fan and system selector switches at ON and OFF posi-
tions, respectively. Indoor-fan operates continuously to pro-
vide constant air circulation.
Fig. 32 — Belt Drive Motor Mounting
Fig. 33 — Indoor-Fan Pulley Adjustment
CARE AND MAINTENANCE
To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic mainte-
nance must be performed on this equipment. This combina-
tion heating/cooling unit should be inspected at least once each
year by a qualified service person.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
WARNING: The ability to properly perform mainte-
nance on this equipment requires certain expertise, me-
chanical skills, tools, and equipment. If you do not pos-
sess these, do not attempt to perform any maintenance
on this equipment other than those procedures recom-
mended in the User's Manual. FAILURE TO HEED THIS
WARNING COULD RESULT IN SERIOUS PERSONAL
INJURY AND POSSIBLE DAMAGE TO THIS
EQUIPMENT.
The minimum maintenance requirements for this equipment
are as follows:
1. Inspect air filters each month. Clean or replace when
necessary.
2. Inspect cooling coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.
3. Inspect blower motor and wheel for cleanliness and check
lubrication each heating and cooling season. Clean and
lubricate (if required) when necessary.
4. Check electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service when necessary.
5. Check and inspect heating section before each heating
season. Clean and adjust when necessary.
6. Check and clean outdoor inlet screens, if needed.
—24—
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