Commercial Air Conditioner
Model: heat pump, 10SEER UNITS
32
A. First
TURN OFF ELECTRICAL POWER
to the outdoor unit
B. Remove the top with the outdoor fan attached.
C. Flush water through the coil from the inside out.
NOTE: Do not to get water on any controls or other electrical devices. If anything electrical gets
wet, dry it thoroughly before energizing.
There are commercial coil cleaning solvents. Follow the solvent manufacturer’s instructions when using
Normally the solvent is sprayed onto the coil. Allow several minutes for the solvent to dissolve any
organic matter .Wash away the solvent and any dissolved matter with water from a garden hose.
NEVER USE A WEATHER COVER OVER THE OUTDOOR UNIT
. The unit is designed to operate
outdoors. A cover traps moisture in the unit causing rust and corrosion .There is the added danger of
starting the system with the cover on. This prevent air flow through the outdoor coil causing dangerous
system pressure .Compressor damage result.
INDOOR COIL MAINTENANCE
Inspect the indoor coil at least once a year for cleanliness and clean as necessary.
1. The coil can be cleaned when dry . If it is coated with lint or dirt ,blow compressed air or
nitrogen(NEVER USE REFRIGERNAT )through the supply air side of the coil fins. Place a sheet of
metal or cardboard under the return air side of the coil to catch any debris before it gets into the air
handler.
2. If the coil is coated with oil or grease ,clean with a mild detergent and water solution. Rinse
thoroughly with clear water .Be careful not to get water into the air handler.
3. After cleaning the coil, inspect the drain pan and condensate line .Remove any debris from the pan
and flush with clear water.
4. Use high pressure water to clear any clog in the condensate line.
WARNING: DO NOT USE CAUSTIC HOUSEHOLD DRAIN CLEANERS IN THE CONDENSATE PAN
OR NEAR THE INDOOR COIL .THESE DRAIN CLEANERS QUICKLY DAMAGE THE INDOOR COIL.
10. SERVICE AND TROUBLESHOOTING
WARNING
：
THE ABILITY TO PROPERLY PERFORM SERVICE ON THIS EQUIPMENT REQUIRES
CERTAIN EXPERTISE
，
MECHANICAL SKILLS
，
TOOLS AND TEST EQUIPMENT .IF YOU DO NOT
POSSESS THESE,DO NOT ATTEMPT TO PERFORM ANY MAINTENANCE ON THIS EQUIPMENT
OTHER THAN THOSE PROCEDURES RECOMMENDED IN THE USER’S MANUAL.
A FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THE
EQUIPMENT, SERIOUS TO THE EQUIPMENT ,SERIOUS PERSONAL INJURY ,OR DEATH.
The HVAC industry ,like the auto industry, is faced with increasing government imposed efficiency
regulations. New and more sophisticated mechanical means for achieving higher efficiencies have been
engineered.. The use of test equipment is now more critical than ever.
In the servicing and troubleshooting section is information on compressors and other components and
their test procedures. There are troubleshooting charts, charging charts, wiring diagrams and service
analyzer charts. Included is list of suggested test equipment.
Use this information to service and understand the installation ,operation and troubleshooting of the
current families of air conditioning. The procedures in this section are of necessity ,generic in content.
Each product family incorporates some of these components .Be aware of this is a guide compiled from
numerous sources. It can not take into consideration all conditions found in all installations.
Note:
Upon arrival at the job site, inspect the installation. Make sure the installation was done according
to the manufacturer’s
Installation and Operation instruction Manual. Have a copy of the manual in
case it was not left on the job site.
REFRIGERANT RECOVERY
Refrigerant system using chlorofluorocarbon (CFC) and Hydrochlorofluorocarbon (HCFC) refrigerant
have been subjected to increase regulation, due to
the clean air Act of 1990.
This act prohibits the
unrestricted release of refrigerant into the air .Proper charging of refrigerant system may require
removing some refrigerant when the system is overcharged. How does one comply with the act and also
provide the service that the customer needs? By recovering the excess refrigerant.
Recovery
means to pump the special holding container .
Recycling
means to run the refrigerant through
a filtering system to remove most particles and moisture.
Reclaiming
means to chemically reprocess
the refrigerant to return it to its original purity.
Recovering and recycling
refrigerant is possible with the aid of mechanical devices made for the
purpose .The recovery system is a compressor –driven pump assembly, which removes refrigerant from
