Carrier Air Conditioner Condenser Coils, Cooler Head Bolt Tightening Sequence Typical Tube Sheet

3.Apply torque in one-third steps until required torque is reached. Load all bolts to each one-third step before pro- ceeding to next one-third step.

4.No less than one hour later, retighten all bolts to required torque values.

5.After refrigerant is restored to system, check for refriger- ant leaks with soap solution or Halide device.

6.Replace cooler insulation.

Condenser Coils

COIL CLEANING — For standard aluminum, copper and pre-coated aluminum fin coils, clean the coils with a vacuum cleaner, fresh water, compressed air, or a bristle brush (not wire). Units installed in corrosive environments should have coil cleaning as part of a planned maintenance schedule. In this type of application, all accumulations of dirt should be cleaned off the coil.

Do not use high-pressure water or air to clean coils — fin damage may result.

CLEANING E-COATED COILS — Follow the outlined pro- cedure below for proper care, cleaning and maintenance of E-coated aluminum or copper fin coils:

Coil Maintenance and Cleaning Recommendations — Rou- tine 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 extend the life of the unit.

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 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 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 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 applied in coastal or industrial environments. However, it is very important that the water rinse is made with very low velocity water stream to avoid damaging the fin edges. Monthly cleaning as described below is recommended.

Routine Cleaning of Coil Surfaces — Monthly cleaning with Enviro-Shield™ Coil cleaner is essential to extend the life of coils. It is recommended that all coils, including standard aluminum, pre-coated, copper/copper or E-coated coils are cleaned with the Enviro-ShieldCoil Cleaner as described below. Coil cleaning should be part of the units regularly scheduled maintenance procedures to ensure long life of the coil. Failure to clean the coils may result in reduced durability in the environment.

Enviro-ShieldCoil Cleaner is non-flammable, hypoaller- genic, non-bacterial, USDA accepted biodegradable and 100% ecologically safe agent that will not harm the coil or surround- ing components such as electrical wiring, painted metal surfac- es or insulation. Use of non-recommended coil cleaners is strongly discouraged since coil and unit durability could be affected.

SIZES 080,090* WITH 18-BOLT HEADS

SIZES 080,090* WITH 14-BOLT HEADS SIZES 100,110* WITH 22-BOLT HEADS SIZES 100,110* WITH 16-BOLT HEADS

	SIZES 170,190*
SIZES 130,150*	SIZE 210*

*And associated modular units.

Fig. 27 — Cooler Head Bolt Tightening Sequence (Typical Tube Sheet)

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