Cooling; Routine Cleaning Of Coil Surfaces; Periodic Clean Water Rinse; Condenser Coil Maintenance And Cleaning Recommendation - Carrier 50FC Series Service And Maintenance Instructions

COOLING

WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
This system uses Puron ®
sures than R-22 and other refrigerants. No other refrigerant
may be used in this system. Gage set, hoses, and recovery
system must be designed to handle Puron refrigerant. If un-
sure about equipment, consult the equipment manufacturer.
Condenser Coil
The condenser coil is fabricated with round tube copper hairpins
and plate fins of various materials and/or coatings (see Model
Number Nomenclature in Appendix A to identify the materials
provided in this unit). The coil may be one-row or composite-
type two-row. Composite two-row coils are two single-row coils
fabricated with a single return bend end tubesheet.
Condenser Coil Maintenance and Cleaning
Recommendation
Routine cleaning of coil surfaces is essential to maintain proper
operation of the unit. Elimination of contamination and remov-
al of harmful residues will greatly increase the life of the coil
and extend the life of the unit. The following maintenance and
cleaning procedures are recommended as part of the routine
maintenance activities to extend the life of the coil.
REMOVE SURFACE LOADED FIBERS
Surface loaded fibers or dirt should be removed with a vacuum
cleaner. If a vacuum cleaner is not available, a soft non-metal-
lic bristle brush may be used. In either case, the tool should be
applied in the direction of the fins. Coil surfaces can be easily
damaged (fin edges can be easily bent over and damage to the
coating of a protected coil) if the tool is applied across the fins.
NOTE: Use of a water stream, such as a garden hose, against a
surface loaded coil will drive the fibers and dirt into the coil. This
will make cleaning efforts more difficult. Surface loaded fibers
must be completely removed prior to using low velocity clean wa-
ter rinse.

PERIODIC CLEAN WATER RINSE

A periodic clean water rinse is very beneficial for coils that are
applied in coastal or industrial environments. However, it is
very important that the water rinse is made with a very low ve-
locity water stream to avoid damaging the fin edges. Monthly
cleaning as described below is recommended. Rinsing coils in
the opposite direction of airflow is recommended.
refrigerant which has higher pres-

ROUTINE CLEANING OF COIL SURFACES

Periodic cleaning with Totaline
coil cleaner is essential to extend the life of coils. This cleaner
is available from Replacement Components Division as part
number P902-0301 for a one gallon container, and part number
P902-0305 for a 5 gallon container. It is recommended that all
coils, including standard aluminum, pre-coated, copper/copper
or e-coated coils be cleaned with the Totaline environmentally
balanced coil cleaner as described below. Coil cleaning should
be part of the unit's regularly scheduled maintenance proce-
dures to ensure long life of the coil. Failure to clean the coils
may result in reduced durability in the environment.
Avoid use of:
• coil brighteners
• acid cleaning prior to painting
• high pressure washers
• poor quality water for cleaning
Totaline environmentally balanced coil cleaner is nonflamma-
ble, hypo-allergenic, non-bacterial, and a USDA accepted bio-
degradable agent that will not harm the coil or surrounding
components such as electrical wiring, painted metal surfaces,
or insulation. Use of non-recommended coil cleaners is strong-
ly discouraged since coil and unit durability could be affected.
One-Row Condenser Coil (50FC 04 units only)
Wash coil with commercial coil cleaner. It is not necessary to
remove top panel.
Two-Row Condenser Coils (50FC 05-07 units)
Clean coil as follows:
1. Turn off unit power, tag disconnect.
2. Remove all screws from the top panel except the screws
securing the condenser fan to the top panel. See Fig. 15.
TOP PANEL
REMOVE SCREWS
FROM ALL SIDES
OF TOP PANEL
CENTER
POST
COMPRESSOR
ACCESS PANEL
CONDENSER COIL
CORNER POST
Fig. 15 — Location of Screws and Coil Corner Post
3. Lift and rotate the top panel at the condenser fan end and
rotate the panel 90 degrees. Support the top panel so it
remains level while resting on the condenser fan as shown
in Fig. 16.
10
environmentally balanced
®
REMOVE
SCREWS
CONDENSER
FAN
CONDENSER
COIL