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4
22 3/8 (569 mm)
HOOD
DIVIDER
OUTSIDE
AIR
CLEANABLE
ALUMINUM
FILTER
BAROMETRIC
RELIEF
FILTER
CAP
FILTER
C08634
Fig. 3 -- Filter Installation
To remove the filter, open the spring clips. Re--install the
filter by placing the frame in its track, then closing the
spring clips.
Manual Outside Air Hood Screen
This inlet screen is secured by a retainer angle across the
top edge of the hood. (See Fig. 4.)
C07156
Fig. 4 -- Screens Installed on Outdoor--Air Hood
(Sizes 7-1/2 to 12-1/2 Tons Shown)
To remove the screen, loosen the screws in the top retainer
and slip the retainer up until the filter can be removed.
Re-install by placing the frame in its track, rotating the
retainer back down and tighten all screws.
SUPPLY FAN (BLOWER) SECTION
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on the fan system, shut off all unit power and tag--out
the unit disconnect switch. Do not reach into the fan
section with power still applied to unit.
!
WARNING
Supply Fan (Belt--Drive)
The supply fan system consists of a forward--curved
centrifugal blower wheel on a solid shaft with two
concentric type bearings, one on each side of the blower
housing. A fixed--pitch driven pulley is attached to the fan
shaft and an adjustable--pitch driver pulley is on the
motor. The pulleys are connected using a “V” type belt.
(See Fig. 5.)
C07087
Fig. 5 -- Belt Drive Motor Mounting
Belt
Check the belt condition and tension quarterly. Inspect the
belt for signs of cracking, fraying or glazing along the
inside surfaces. Check belt tension by using a spring-force
tool (such as Browning’s Part Number “Belt Tension
Checker” or equivalent tool); tension should be 6-lbs at a
5/8-in. deflection when measured at the centerline of the
belt span. This point is at the center of the belt when
measuring the distance between the motor shaft and the
blower shaft.
NOTE
: Without the spring--tension tool, place a straight
edge across the belt surface at the pulleys, then deflect the
belt at mid--span using one finger to a 1/2-in. deflection.
Adjust belt tension by loosening the motor mounting plate
front bolts and rear bolt and sliding the plate toward the
fan (to reduce tension) or away from fan (to increase
tension). Ensure the blower shaft and the motor shaft are
parallel to each other (pulleys aligned). Tighten all bolts
when finished.
48TC
Summary of Contents for WeatherMaker 48TC*D08
Page 10: ...10 COOLING CHARGING CHARTS C08669 Fig 10 Cooling Charging Charts D08 48TC ...
Page 11: ...11 COOLING CHARGING CHARTS C08670 Fig 11 Cooling Charging Charts D12 48TC ...
Page 12: ...12 COOLING CHARGING CHARTS C09151 Fig 12 Cooling Charging Charts D14 Circuit A 48TC ...
Page 13: ...13 COOLING CHARGING CHARTS C09152 Fig 13 Cooling Charging Charts D14 Circuit B 48TC ...
Page 37: ...37 C08665 Fig 43 Typical PremierLinkt System Control Wiring Diagram 48TC ...
Page 45: ...45 C07129 Fig 60 RTU MP Multi Protocol Control Board 48TC ...
Page 46: ...46 C09163 Fig 61 Typical RTU MP System Control Wiring Diagram 48TC ...
Page 67: ...67 C09156 Fig 84 48TC Typical Unit Wiring Diagram Power D08 208 230 3 60 48TC ...
Page 68: ...68 C09157 Fig 85 48TC Typical Unit Wiring Diagram Control D08 208 230 3 60 48TC ...