Carrier R-410A manual Start-Up, Service, Electrical Shock Hazard

Fig. 19 — Duct Flange Installation

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?

Also refer to condensing unit 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 in- tervals 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.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause 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.

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 — Size 25-30 units have pillow- block bearings (Fig. 20) that must be lubricated with suitable bearing grease approximately every 3 months. See Table 7 for suitable lubricants.

Table 7 — Lubricant Data

MANUFACTURER	LUBRICANT
Mobil	Mobilplex EP No. 2
Sunoco	Prestige 42
Texaco	Multifak 2
Texaco	Regal AFB-2*

*Preferred lubricant, contains rust and oxidation inhibitors.

Fig. 20 — Fan Shaft, Bearings, and Fan Wheel (Typical)

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