START-UP
Before starting unit, check the following and correct as necessary:
•
Is unit solidly supported?
•
Is fan adjusted for speed and pulley alignment?
•
Are pulleys, motor, and bearings securely mounted?
•
Are there any loose parts that will rattle or vibrate?
•
Is condensate drain pan pitched for correct drainage?
•
Are coil baffle plates tight against coil to prevent air bypass?
•
Are all panels securely fastened?
•
Are all electrical connections correct and tight?
•
Is TXV bulb located on suction tube per Fig Face-Split Coil Suction and Liquid Line Piping (Typical)?
•
Is the capillary tube to the bulb free of kinks and not subject to pinching?
•
Is the bulb well secured to the suction tube with strap?
Also refer to condensing unit or outdoor heat pump section instructions before starting a split system. A split system
start-up checklist is provided at the end of these instructions.
SERVICE
Inspection and maintenance should be performed at regular intervals and should include the following:
•
Complete cleaning of cabinet, fan wheel, cooling coil, condensate pan and drain, heating coils, and return-air
grille (if present).
•
Inspection of panels and sealing of unit against air leakage.
•
Adjustment of fan motor, belt, bearings, and wheels.
•
Cleaning or replacement of filters.
•
Testing for cooling/heating system leaks.
•
Checking of all electrical connections.
Most unit service can be performed by removing one or both of the unit’s side panels. Coil cleaning or removal or
insulation cleaning may require removal of a rear, top, or bottom panel, depending on the unit’s orientation. When
service is completed, replace unit panels.
Panels -
Panels are fastened to unit frame with sheet metal screws. Fan and coil compartment must be sealed tightly
after service to prevent air from bypassing the cooling coil.
Fan Motor Lubrication -
Fan motor supplied with unit is permanently lubricated and requires no further lubrication.
Fan Shaft Bearings -
Bearings on size 07-12 units are sealed, permanently lubricated bearings that require no further
lubrication. Size 14-16 units have pillow—block bearings (Fig. Fan Shaft, Bearings, and Fan Wheel (Typical) that must
be lubricated with suitable bearing grease approximately every 3 months. See below for suitable lubricants.
Manufacturer
Lubricant
Mobil
Mobilplex EP No. 2
Sunoco
Prestige 42
Texaco
Multifak 2
Texaco
Regal AFB - 2*
*Preferred lubricant, contains rust and oxidation inhibitors.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before performing service or maintenance operations on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one power switch.
WARNING
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