Fig. 19 — Duct Flange Installation
START-UP
Before starting unit, check the following and correct as nec- essary:
•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?
Also refer to condensing unit instructions before starting a split system. A split system
Fan Shaft Bearings — Bearings on size
Table 7 — Lubricant Data
MANUFACTURER | LUBRICANT |
Mobil | Mobilplex EP No. 2 |
Sunoco | Prestige 42 |
Texaco | Multifak 2 |
Texaco | Regal |
*Preferred lubricant because it contains rust and oxidation inhibitors.
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
•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 insu- lation 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.
Fig. 20 — Fan Shaft, Bearings, and Fan Wheel
(Typical)
25