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COOLING
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
This system uses R-410A refrigerant, which has higher
pressures than R-22 and other refrigerants. No other
refrigerant may be used in this system. Gauge set, hoses, and
recovery system must be designed to handle R-410A
refrigerant. If unsure 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 2-row. Composite 2-row coils are 2 single-row coils fabri-
cated 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 removal of
harmful residues will greatly increase the life of the coil and ex-
tend 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-metallic
bristle brush may be used. In either case, the tool should be ap-
plied in the direction of the fins. Coil surfaces can be easily dam-
aged (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 water rinse.
PERIODIC CLEAN WATER RINSE
A periodic clean water rinse is very beneficial for coils that are ap-
plied in coastal or industrial environments. However, it is very im-
portant that the water rinse is made with a very low velocity water
stream to avoid damaging the fin edges. Monthly cleaning as de-
scribed below is recommended. Rinsing coils in the opposite di-
rection of airflow is recommended.
ROUTINE CLEANING OF COIL SURFACES
Periodic cleaning with Totaline
cleaner is essential to extend the life of coils. This cleaner is avail-
able from Replacement Components Division as P/N P902-0301
for a one gallon container, and P/N P902-0305 for a 5 gallon con-
tainer. It is recommended that all coils, including standard alumi-
num, pre-coated, copper/copper or e-coated coils be cleaned with
the Totaline environmentally balanced coil cleaner as described be-
low. Coil cleaning should be part of the unit's regularly scheduled
maintenance procedures 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
®
environmentally balanced coil
Totaline environmentally balanced coil cleaner is nonflammable,
hypo-allergenic, non-bacterial, and a USDA accepted biodegrad-
able 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 strongly discouraged since
coil and unit durability could be affected.
Two-Row Condenser Coils
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. 18.
Top Panel
Remove screws
from all sides
of top panel
Center
Post
Compressor
Access Panel
Condenser Coil
Corner Post
Fig. 18 — 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. 19.
Compressor
Access
Panel
Fig. 19 — Top Panel Position
4.
Remove the compressor access panel to access the lower
coil clip. The condenser coil corner post may also be
remove.
5.
Remove the screws from both sides of the upper and lower
coil retaining clips on the hairpin end of the coil tube
sheets. See Fig. 20.
6.
Remove the upper and lower retaining clips.
12
Remove
Screws
Condenser
Fan
Condenser
Coil
Top Panel
Support
(Field-
Supplied)
Center
Baffle
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