At the beginningof eachcoolingseason,the system
shouldbecheckedasfollows:
OUTDOORUNIT
1, Cleanandinspectoutdoorcoil(maybeflushedwitha
waterhose).Ensurepowerisoffbeforecleaning,
2, Outdoorunitfanmotoris pre-lubricatedandsealed.
Nofurtherlubricationisneeded.
3,Visuallyinspectallconnectinglines,jointsandcoilsfor
evidenceofoilleaks.
4, Checkallwiringforlooseconnections,
5, Checkforcorrectvoltageatunit(unitoperating),
6, Checkampdrawonoutdoorfanmotor,
UNITNAMEPLATE: ACTUAL:
7, Inspectdrainholesin coil compartmentbaseand
cleanifnecessary,
NOTE - If insufficient heating or cooling occurs, the unit
should be gauged and refrigerant charge should be
checked.
INDOOR COIL
1. Clean coil if necessary.
2. Check connecting lines, joints and coil for evidence of
oil leaks,
3. Check condensate line and clean if necessary,
INDOOR UNIT
1, Clean or change filters,
2, Blower motors are prelubricated and permanently
sealed, No more lubrication is needed,
3, Adjust blower speed for cooling, Measure the pressure
drop over the coil to determine the correct blower CFM
Refer to the unit information service manual for pressure
drop tables and procedure.
4, Belt Drive Blowers - Check belt for wear and proper
tension,
5, Check all wiring for loose connections.
6. Check for correct voltage at unit, (blower operating)
7, Check amp draw on blower motor.
UNIT NAMEPLATE: ACTUAL:
OPTIONAL ACCESSORIES
Refer to the Engineering Handbook for optional
accessories that may apply to this unit, The following may
or may not apply:
kWARNING
IMPORTANT
NOTE - A white residue may appear on the coil guards and
grilles on outdoor units, The residue is a non-toxic
byproduct of manufacturing the flexible coating. It can be
removed by wiping the coil guard with a cloth.
9 PINS USED ON -048
AND _060; 6 PINS ALL
OTHERS
PUSH Pli'
MESH SCREEN
Figure 34. Cleaning debris from mesh
Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each
cooling season, the system should be checked as follows:
1, Make sure power is off before cleaning. Clean and
inspect outdoor coil, The coil may be flushed with a
water hose,
2, The outdoor coil is protected by an inner mesh screen
and a wire cage (see figure 34), If debris has collected
between the mesh screen and the coil and cannot be
dislodged by spraying unpressurized water from
inside coil surface to the outside, the mesh may be
removed by first removing the top of the unit which will
allow for removal of the wire cage,
3, Then, using pliers to grip the head of the push pins, pull
straight out to extract the push pins along one side of
the coil. If necessary, remove the push pins along the
back of the unit; it is usually unnecessary to fully
remove the inner mesh screen,
4. Drape the mesh screen back and wash the coil. When
all the debris has been removed from the coil, reinstall
the mesh screen by positioning it in its original position
Page19
13ACD SERIES
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