Carrier 38AQ Specifications download pdf (Page 26)

Coil Cleaning and Maintenance--This section dis-

cusses the cleaning and the maintenance of standard coils and

E-Coated coils. Routine cleaning of coil surfaces is essential to

minimize contamination build-up and remove harmful residue.

Inspect coils monthly and clean as required.

CLEANING STANDARD COILS -- Standard coils can be

cleaned with a vacuum cleaner, washed out with low velocity

water, blown out with compressed ail; or blushed (do not use

wire brush). Fan motors _u'e dripproof but not waterproof. Do

not use acid cleaners.

Clean coil annually or as required by location or outdoor air

conditions. Inspect coil monthly and clean as required. Fins are

not continuous through coil sections. Dirt and debris may pass

through first section and become trapped, restricting condenser

airflow. Use a flashlight to determine if dirt or debris has

collected between coil sections.

Clean coils as follows:

1. Turn off unit powel:

2. Remove screws holding rear corner posts and top cover

in place. Pivot top cover up 12 to 18 in. (300 to 450 mm)

and support with a board or other adequate rigid support.

See Fig. 24.

3. Remove clips securing tube sheets together at the return

bend end of the coil. Carefully spread the ends of the coil

rows apart by moving the outer sections. See Fig. 25.

4. Using a water hose or other suitable equipment, flush

down between the sections of coil to remove dirt and

debris.

5. Clean the lemaining surfaces in the normal mannel:

6. Reposition outer coil sections. Reinstall clips which se-

cure tube sheets, and replace top cover and rear corner

posts.

7. Restore unit powel:

CLEANING AND MAINTAINING E-COATED CO[LS --

Routine cleaning of condenser coil surfaces is essential to main-

tain proper operation of the unit. Elimination of contamination

and removal of harmlul residue will greatly increase the life of

the coil and extend the life of the unit. The following mainte-

nance and cleaning procedures gue recommended as Dul of the

routine maintenance activities to extend the life of the coil.

TOP

COVER

RIGID

SUPPORT

Fig. 24 -- Pivot and Support Top Cover

SPREAD

OUTER COIL

SECTIONS

OLFi3NARD

Fig. 25 -- Coil Cleaning (Typical)

Remove Surface Loaded Fibers -- Debris such as dirt and

fibel;s on the surface of the coil should be removed with a

vacuum cleanel: If a vacuum cleaner is not available, a soil

brash may be used. The cleaning tool should be applied in the

direction of the fins. Coil surfaces can be easily damaged (fin

edges bent over) 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 fibel.'s and dirt into the coil.

This will make cleaning efforts more difficult. Surface debris

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 applied in coastal or industri_fl

environments. Howevek it is very important that the water

rinse is made with very low velocity water stream to avoid

damaging the tin edges. Monthly cleaning is recommended.

Routine Cleaning of E-Coated Coil Surfaces -- Monthly

cleaning with Environmentally Sound Coil Cleaner is essential

to extend the life of coils. It is recommended that all coils includ-

ing stan&trd aluminum, pre-coated, copper/coppek or E-coated

coils be cleaned with the Environmentally Sound Coil Cleaner

as described below. Coil cleaning should be Du-t of the regularly

scheduled maintenance procedures of the unit to ensure long life

of the coil. Failure to clean the coils may result in reduced dura-

bility in the environment.

Environmentally Sound Coil Cleaner is non-bacterial,

biodegra&tble and will not harm the coil or sunounding compo-

nents such as electric_d wiring, painted metal surfaces or insula-

tion. Use of non-recommended coil cleaners is strongly discour-

aged since coil and unit durability could be affected.

The following field supplied equipment is required for coil

cleaning:

• 21/2 gallon (9.5 liter) garden sprayer

• water rinse with low velocity spray nozzle

Environmentally Sound Coil Cleaner Application Instructions

-- Perform the following procedure to clean the coil.

NOTE: Wear proper eye protection such as safety glasses

during mixing and application.

1. Remove all surface debris and dirt from the coil with a

vacuum cleaner

2. Thoroughly wet finned surfaces with clean water _md a

low velocity garden hose, being careful not to bend tins.

3. Mix Environment_dly Sound Coil Cleaner in a 21/2 g_dlon

(9.5 liter) garden sprayer according to the instructions

included with file cleaner. The optimum solution temper-

ature is 100 F (37.8 C).

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Carrier 38AQ Specifications Page 26

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